How to installation of a GPS navigation system

Installed GPS, one long distance by car, never disoriented far away confidently, and in the town, able to cope with the electronic map, "Luchi" owners can easily find an alley, even according to the GPS system of navigation routes quickly and unmistakably arrives want to go to a strange place.
GPS positioning satellite signal service is free of charge, and the GPS receiver processing systems as well as the cost of electronic map declining There are already some models equipped with a GPS system, the installation of GPS navigation systems generally require 4000-6000 yuan, while most of the GPS every month to pay the cost 50-100 dollars. Car GPS Navigation Categories
Handheld GPS navigator. The electronic map handheld GPS on the one hand to support the poor, on the other hand its screen is small, less the amount of information displayed is not practical for the owners.
2, the original GPS navigation system. Many luxury cars as well as domestic high-configured version of the car factory GPS navigation system for selection.
3, the deputy factory GPS navigation system. There are many professional manufacturers for the automotive GPS system retrofitting. This GPS device is suitable for those who do not have the original GPS models, performance and after-sales service is also good, and the price is not too high, generally only a few thousand dollars, is currently the most popular.
4, GPS navigation head DIY. If you want the most money, if you are willing to spend the effort to purchase the GPS navigation head connected via Bluetooth or cable with a laptop or handheld computer, composed of a GPS system with Skywalker electronic map, the effect is also very good, and the lowest price, a GPS navigation head only a few hundred dollars, if you do have a Pocket PC or notebook, and the largest single overhead-free. Electronic maps now prices are also declining, the case of promotion as long as a few hundred dollars, and even made a free upgrade, so doing the lowest as little as one thousand yuan can have a professional GPS navigation. Rule # 1, equipped with GPS to save money to shop around and get rid of the GPS is the concept of complex high-tech products, avoid "Aizai.
2 different GPS suppliers biggest difference is that after-sales service, especially the electronic map, the various electronic map accuracy and update speed is the most critical measure of its product is good or bad. Good under the premise of the electronic map, you can consider buying cheap products.

Look at the optimum shift from the engine structure

We all know that the intake and exhaust engine condition and the importance of efficiency, many advanced engine design in this regard is also the brains, such as variable valve timing, variable valve stroke, variable intake manifold length no not in the intake and exhaust conditions to improve the speed range, allow the engine to run in different speed range in the best condition.
Ordinary economy cars, especially the low grade of the European Department of the United States Department of the sedan's engine, basically did not use these three "variable" technology, including the the above Speaking Passat 1.8 engine. Hereinafter from the valve timing, the length of the valve stroke and into the trachea of ​​these three structures to illustrate why the ordinary engine, the shifting speed should be in the vicinity of the maximum torque speed.
Valve timing
The valve timing refers to the opening of the intake and exhaust valve timing is controlled by the rotational angle of the camshaft. The the ordinary engine camshaft angle is fixed, so the valve timing is fixed.
We know, air is inertial, in the moment of the intake valve opening, air and not by the time difference quickly into the cylinder, he needs a very short reaction time, Therefore, in the design of the engine, it will enter the suction (that is, before the stroke of the piston is run down before), advance to open the intake valve, in order to offset the time difference of the intake air in order to obtain a more adequate intake air. In the exhaust stage, the same principle, when the exhaust gas rises to the top of the piston, the exhaust gas is not discharged to the maximum extent, due to the inertia and speed, exhaust emissions, the most amount of time appears to rise to the top of the piston after a very short time. In order to more fully in the exhaust gas, the need to make the exhaust gate delay moment then close after the piston reaches the vertex. This one in advance, a delay, there must be a period of time the intake valve and the exhaust valve is opened at the same time, this phenomenon is called "valve superimposed angle.
The engine at the time of high-speed and low-speed operation, the demand for superimposing angle is not the same. Smaller superimposed a large the superposition angle, high speed, low speed, angle - the angle of an overlay can be suitable for high and low speed. But the ordinary engine valve timing is constant, that is, the valve superimposed angle is fixed. For no special needs of the engine (such as racing engine will be intentionally designed to adapt to the high speed the smaller the superposition angle), valve superimposed angle design tend to take a compromise value, in this compromise speed region superimposed angle is the most appropriate. The most appropriate there is inappropriate, this fixed valve superimposed angle at low speed and high speed, the working state of the engine is not the best. This is not hard to understand why the low conversion file uncomfortable - did not get the best valve superimposed angle, the poor state of the engine work, torque and side effects. Before it comes to older drivers who may not know, he was driving like that all day, not only the power of small, very serious damage to the engine. Passat 1.8 engine is the design of the German superimposed angle of the engine is deliberately designed to be high-speed demand - because almost all of the German car like the high-speed transmission. Opposite the old master, so most of the time this poor high rpm engine to meet the high turn demand valve superimposed angle design at least it is not suitable for low rpm run, let it run low rpm is very unhealthy. It is also understandable why his Passat is always something wrong with it!

Valve stroke
The stroke of the valve is determined by the length of the camshaft corner, most of the engine's valve stroke are immutable.
The valve stroke determines for each valve in the intake cross-sectional area, this value in the high engine speed and low speed is the demand is not the same. When the engine in high speed, you need a relatively long stroke of the valve to the large intake cross-sectional area, thereby increasing the speed of the high speed intake, increase power output; When the engine is at low speed, shorter valve stroke, to produce a greater negative pressure.

With the intake valve opening and closing of the air intake manifold inside there will be an oscillation process. , The air inside the intake manifold when the engine air intake flow based on a constant speed to the cylinder in the intake valve closes instantaneously, the air flowing through the intake valve blocking, due to the characteristics of the movement of air, this part of the air to the accumulation of the direction of the intake valve (i.e., compression), and then in the opposite direction to rebound, and so forth, the formation of oscillation.

How to waxing your car

The modern paint the outer layer, also called clear lacquer layer (professional name for the cover smooth paint), and only 0.03 mm thick, like a piece of tissue paper. Some people may tell you: the modern paint without protection. 0.03 mm thick clearcoat in fact stand up to the erosion of the ultraviolet light, acid rain, salt, alkali and other contaminants. No wax protection, starting from the new car, the paint will be hydrogenated, your car will gradually lose its original luster, high-quality car washing, waxing, make your car remain forever young.
Therefore, to keep the car tidy car capacity, waxing is essential. Many owners have a one-sided understanding of, or frequent waxing, or simply do not fight; Some owners believe that, the more expensive the better, Chela rarity in the import car wax use. In fact, these practices are not afraid when. So how car waxing it?
Chela types of choices
Currently, a wide range of car wax on the market. The points both solid and liquid, high-end and mid-range of the other. Well as the selection of domestic and imported.
Various Chela performance, its role and effect is not the same, so must be careful in the selection choose inappropriate not only not protect the body, but to paint color. Normal circumstances, should be based on the role of the characteristics of the wax, the age of the vehicle, the paint colors and driving environment, and other factors considered.
Limousine, the choice of high-grade wax; new car is the best car pre-painted wax polish to protect your gloss and color; Xia Tianyi wax with UV protection; poor driving environment with a prominent protective effect resin wax is more appropriate ; ordinary vehicles, with ordinary pearl or metallic paint series car wax can. Of course, must also be considered in selection of the wax with paint color, generally dark paint choice selection of black, red, green series of car wax, light-colored paint cars silver, white, pearl color series of wax.
To select manufacturers, brand-name products, and depends on the manufacturers instructions. Manufacturers, brand-name products will be clearly labeled use, for example, applies in clearcoat "," suitable for all paint and other instructions. If no instructions are also available on the spot to be a test for simple identification: hand dip wax, rub gently between two fingers, If you do not feel there is any fine granular substance, this wax cause scratches less likely. But does not prove that this is a good wax. Of course, if your car is Putong Qi. Not a big problem with this wax.

The car modified has three "Basic Law"

Pursuit of individual modifications, now become as many owners a stylish car. The Basic car modified car owners close contact, launched special car modification of the three.

Spark plug: commonly known as spark plugs, it is sent to the high-voltage wires (spark plugs line) pulse high voltage discharge, air breakdown spark plug between the two electrodes, the spark is generated in order to ignite the gas mixture within the cylinder.


The basic conditions of the high-performance engines: the spark of a high energy stability, mixing a mixed gas, the high compression ratio, the visible spark plug degree of importance. Change the spark plugs need their own car and habits linked.

Engine: Just like the human heart, the engine is the heart of the car, which is the most important part of the whole car. And modification is the most troublesome, its main modification is to increase its output power modified way: increase the bore, improve the compression ratio, the addition of the valve, and so on, but it must be noted that the modified engine is quite dangerous, a careless will damage the engine, and even lead to serious security incidents.

Negative supercharged speed: it can be installed in the automotive intake manifold, the position of the throttle from computer-controlled, does not affect the original car configuration, and easy to disassemble, even if it is installed in the new car replacement new car can successfully remove continue to use. After installation on your car starts there will be obvious feeling. Start, you can feel very light throttle. Hard acceleration started in acceleration, power lifting are very obvious, its mainly suitable for gasoline as fuel EFI car.

Using the dashboard develop good habits can fuel economy

With oil prices rising, the vehicle fuel economy is good or bad has become the focus of attention of car buyers. Different models of different levels, different engine displacement, fuel consumption per hundred kilometers, cross-level, cross-displacement does not have much practical significance, after all, to be a B-class car for the use of the public business is even C-Class, the A-class car fuel consumption level is not realistic. Due to different driving habits, but with a car will produce significant fuel consumption differences, sometimes even up to 3 liters / 100 km or more, and therefore develop good driving habits to reduce fuel consumption, the car, the car is more practical reference.
How to develop good driving habits? In addition to often say to avoid hard acceleration, braking, EFI models not neutral slide outside the conventional way, the driver can also be information on the dashboard, to understand the working condition of the vehicle, adjust your driving accordingly in a timely manner, the same can effectively reduce the fuel consumption.
Most of the car manufacturers will give a theoretical fuel consumption, instant uniform driving speed of 90 km fuel consumption, fuel consumption in everyday driving is generally difficult to achieve due to the different air resistance, road friction differences with traffic jams and other reasons, . Through the adjustment of the driving style, the day-to-day driving as much as possible close to the theoretical fuel consumption value is still possible.
Many domestic models, the dashboard information added fuel consumption display function, even as a home-based A-class cars, such as the Peugeot 307, Skoda Octavia models are equipped with this function. Usually most of the people think that the average fuel consumption of the fuel consumption display value, you can understand the value of the fuel consumption of the vehicles in a certain mileage, instantaneous fuel consumption is not too much reference value, and stepped on the accelerator of a slight change in the intensity of the instantaneous fuel consumption change, look tired, start, instantaneous fuel consumption at every turn 30 liters or more people to see frightened.
In fact, instantaneous fuel consumption is not like the above-mentioned as useless, the rational use of the instantaneous fuel consumption change to adjust their driving habits, with the reduction of the instantaneous fuel consumption, average fuel consumption can be followed down? Specifically, until the vehicle starting to achieve relatively stable driving state, by observing the change of the instantaneous fuel consumption, can learn about the intensity of treading the accelerator pedal is moderate, the gearbox in which the gear and speed matches problems, to enhance the driving understanding of the vehicle as well as in developing better driving habits. Any good reasonable driving with speed and transmission gear for a displacement of 2.0L models around, instantaneous fuel consumption as low as 5-6 liters / 100 km, is a very common thing.
Need to be reminded frequently observed driving a vehicle's fuel consumption display, how much will affect traffic safety. To solve this problem, you can display the system through their own modified HUD head, motorists do not have to bow will be able to understand the dashboard.

Effect to buy autocom cd pautomotive additive

Car care products from the role of terms can be roughly divided into the following categories:1 car beauty products2 car cleaning supplies3 car care products 
Main varieties of car care products for the automotive lubricant additives, the United States in the 1920s, the lubricating oil is rarely used additives, from the 1920s, especially the 40-50's newly designed engine and mechanical equipment The conditions are more and more demanding, it requires a lubricant under high load conditions with good high temperature and low temperature performance derives from mineral oil from a refinery in the past, that the lubricant directly from the petroleum refining has been unable to meet these requirements, Therefore, lubricant additives has been a great development, mineral lubricants, chemicals with special features as modified additives, lubricants to be a greater degree of freedom forward, and therefore the application of additives, creating a The new era of modern lubricants. 
Typically, there are five types of lubricating oil additives, detergents, dispersants, viscosity index improvers, antiwear agents, and antioxidants. In order to further improve the performance of the lubricating oil, each company has introduced a new additives such as rust inhibitors, metal deactivators, anti-foaming agents, emulsifiers, demulsifiers, adhesion agents, pour point depressants and synthetic seal expansion agent. Lubricant additives is an indispensable part of modern lubricants Although the amount of small, but they have a decisive role to improve the lubrication performance and meet the requirements of the work under the specific conditions of the various.

 Based on actual use, people tend to want to get the comprehensive performance additives, which requires adding a number of additives that formulation technology or complex technology, manufacturing a variety of additives after suitable preparation process has excellent overall performance and extensive applicability of composite additives to develop a good additive formulations is no easy task, because so far the amount of the additives with performance quantitative relationship has not been established, the use of additives rely mainly on experimental results.

The car modification Dictionary of approach angle

Approach (APPROACH ANGLE) is in the fully loaded car is stationary, automotive front-end salient points to the front wheel cited tangent and the angle between the ground. Namely, the maximum included angle between the horizontal plane and tangential to the plane of the front tire outer edge (static load), the front axle in any preceding rigid member fixed to the vehicle shall not be in this plane in the bottom. Approach angle greater the car on downhill or cross-country travel, the less prone to "contact" and "knock chin" accident, through the performance of the car, the better.
 
 The departure angle (departure angle) refers to the fully loaded car, when at rest, since the body rear end salient points rearward wheels cited the angle between the tangent line and the road surface, i.e. the horizontal plane and the cutting outer edge of the to last wheel tires of the vehicle (static load) the maximum included angle between the plane, located in the last behind the wheel on a vehicle, any fixed rigid member shall not be below this plane. It is characterized by the car left the hillock, obstructions (such as groove depressions, etc.), the ability to not collide. Departure angle the greater, the car through the better.

    Relative to the approach angle uphill departure angle is applicable when going downhill. The vehicle downhill all the way, the current round has been traveling to the ground, and the rear wheel is still on the ramp, rear bumper will not be on the card in the ramp, the key lies in the departure angle. Departure angle greater the vehicle by the steeper the ramp down, and do not have to worry about the rear bumper is stuck stuck.

The automotive turbine modifications essentials

Turbo system the URBO-Chinese transliteration, the full name should be TURBOCHARGER. At present you can buy the original models equipped with turbocharged system engine is not basically set Xuan Xu steel panic spectrum by Greek leaves interpersonal charm posthumous line diagram Dong the the pipit meteorite Greek Xiu AG's, VW's PASSAT 1.8T, BORA 1.8T; domestic AUDI A6 1.8T A4 1.8T imports TT ALROAD QUATTRO 2.7T (V6 Biturbo); senior there SAAB's 9-3,9-5; As for the top non-BENZ S600 ( 5.5L V12 TWIN-TURBO) is none other than (of course there is a vote of diesel vehicles, but in another chapter of exposition).
Indeed, turbocharged engine thanks to its distinctive works, it has excellent liter power performance, relative to the same power NA car, the same power output data and non-extreme conditions of use, the fuel consumption may not be worse than NA cars. Moreover, its biggest advantage is the upgrade convenience X and original modified with X unnatural aspirated engine comparable to enhance the potential.
Turbocharged engine seems a bit complicated for the average person, but only to understand the principle of the turbo itself, then, TURBO, whether single or double TURBO even 4TURBO the form and purpose of their work, processes and principles is the same. Simple statement of the principle is nothing more than the use of high-temperature, high-speed exhaust gas after an explosion stroke engine, special shape called exhaust banana (DOWN PIPE) flows into the exhaust side of the turbo, and promote the exhaust side of the turbine blades rotate, Meanwhile, the angry end coaxially connected with the exhaust side of the turbine blade compression impeller, interested flowing style angry compression after XX cooler (INTERCOOLER) cooling the compressed gas, Be with a certain pressure of the fresh air and high-density , flowing through the throttle valve and the intake manifold into the cylinder after combustion.

The principle is simple but the turbine body is actually a high-tech products. At present, the world fairly more turbocharger brands, such as modified sector is well familiar HKS, GREDDY, APEXi WETTERAUER, MTM, NEUSPEED, mostly by the three most famous manufacturers: IHI of KKK, GARETTE and MITSUBISHI , HITACHI and other foundry. Domestic refit of the most well-known than the KKK, KKK is actually scale less than GARETTE to, but because the most domestic ownership gasoline turbocharged car: BORA 1.8T K03 is factory produced, so if the inevitable is KKK upgrades involving the VAG cars converted, the preferred, such as K04 or K16.

Details of xenon lights installation knowledge

1, HID system will produce a high voltage (23KV) device (Demolition) full attention. Device operation, please check the product before [the ballast group (Ballast), headlights (Bulb Kit) state, such as wire damage, drooling, terminals destruction, high-voltage wire leakage, immediately suspend operations.HID headlights with ballast (Ballast), Link Terminal, please do not arbitrarily change. Lighting will produce high voltage will cause dangerous bodywork leakage. 
3 Headlamp (Headlight) is lit or just after lights out, hands or skin Do not touch the car wash Do not hit the water directly. Headlamp (Headlight) will produce heat, may cause burns. * Car wash or touch near the headlights (Headlight) parts, please fully cool before operating. 
4, please be sure to check the position of the former light shaft (Beam axis), whether moderate and adjust, as appropriate. Brighter than normal halogen headlights (Halogen bulb), the system, such as the optical axis (Beam axis) does not regulate or deliberately so that the optical axis (Beam axis) facing up, may lead to an accident, please be sure to check adjustment. 
5 Do not look directly into the light is lit. Therefore cause eye pain or impaired vision, near Do not look directly into the lit. 
6 Please note that when the device (6.2 ~ 21V), and the positive and negative electrodes.7 device HID wiring group. 
8, device, pay special attention to the power of positive and negative electrodes are grounded pole, such as the car for the special specifications, the positive electrode is grounded, the ballast (Ballast) contact with the body will produce flashover phenomenon, when such vehicles device to be added equipped with a diode wiring group, otherwise it will be dangerous.

Note EFI engine use and maintenance

EFI engine computer control system is more complex, and are very sensitive to the high-voltage and high-temperature use should pay attention to the following points: 1, regardless of whether the engine is in operation, as long as the ignition switch is turned, and never can be disconnected working 12V electrical device. Because in these devices is disconnected, since any of the self-inductance of a coil effect, will produce a high instantaneous voltage, there may be more than 7000V, serious damage to the microcomputer and sensors. The following is a part of the electrical device can not be disconnected: any cable of the battery, the gas mixture control solenoid valve and idle speed control device (stepping motor), the electronic fuel injector, secondary air injection solenoid valve (pump solenoid valve), an ignition means leads, the microcomputer PROM (can be programmed, read-only memory), any wire microcomputer, a blower such as the wire connector and the air conditioning clutch wire 

Jumper starter other vehicles or jump start the car with the other vehicle must disconnect the ignition switch, can disassembly jumper battery cables. Electric horn can not be installed near the microcomputer, because the magnetic field of the magnet in the speaker will damage the circuit components in the computer.Arc welding is used in the body of the vehicle, first disconnect the computer power. Should be particularly careful in place near the computer or sensor body repair job.Disassembly PROM, the operator should make their own the ground (contact body), otherwise, the static electricity from your body may damage the computer circuit. 6, such as wiper leaks should be repaired as soon as possible, so as not to be mounted on the front of the cabin under the siding on the microcomputer damp damage. 7, in addition to the specified otherwise in the test program, can not be tested with a pointer-type ohmic microcomputer and sensor may be used a high impedance meter for testing. 

8, do not use a test light to test any electrical device attached to the microcomputer. To prevent damage to the computer and sensor, unless otherwise noted, should have impedance digital test instrument. 9, the human body electrostatic discharge voltage may reach 10000V. Computer manipulation of digital instrumentation maintenance jobs, or close to this instrument, we must bring the pick-ferrous metal band the First Touchan the wrist and the other head fixed in the fuselage.10, the polarity of the battery can not be reversed, in case the the EFI computer suffered damage. 11, "0" ring seal on the injector disposable parts, and can not be reused after dismantling the injector replaced to ensure a good seal.  

12, the failure of the electronic control system is less. The common failure is often caused by poor wiring, so to ensure clear and reliable contact of each connector, terminal. EFI computer is a high-quality parts, less fault itself, need to check the use of special instruments, generally does not permit the overhaul.

Special road driving precautions

Fog sections
The fog zone driving, first slow, and to enhance the driving track identification and to determine the correct path. Recommend that you follow the signs slowly, or rely on roadside safety zone, open vehicle warning lights, low beam lights and fog lights, and reminded the rear car Note (Do not hit the high beams, so as to avoid the the light curtains phenomenon). If the fog is too heavy to remind you do not force our way through.
Mountainous sections
Weekends sightseeing tour, driving through the mountain roads, we recommend that you: Do not speed too fast, attention should be concentrated; avoid the mountain traffic accident two key. So, to maintain a good physical, concentrate car is very important. Turn try to rely on the outside of traveling. Do not forcibly arresting causing unnecessary danger encountered the rear car overtaking, you may wish to take the initiative to step aside, the road is more spacious slowly and hit a right-turn direction lights, let line
Heavy rain sections
Heavy rain, poor visibility, blurred vision, it is easy to perceive the dangerous condition, the driver will automatically reduce traffic speed. Otherwise difficult to detect a dangerous condition - such as surface water caused by the skidding out of control. Therefore, in order to reduce accidents, driving with his car as far as possible to keep a safe distance and avoid the emergency brake.
Uphill section
The uphill section overtaking the most dangerous. Pay particular attention to the dead line of sight can not see the top of the hill before the top of the hill, and careful slow line, in order to ensure safe and secure.
Downhill section
Downhill section will make people have a feeling of fear: First to worry about hitting the brakes excessively will cause overheating of the brake system malfunction; First worry due to excessive speed downhill, will increase the risk. So you need to focus on the spirit of the car, while taking advantage of the low gears to reduce speed. This will reduce the use of brakes, of course, are less likely to brake failure situation.
Gravel road sections
Gravel sections than other special sections easy traveling, but still can not drive too fast, because the gravel will reduce the coefficient of friction of the tire, resulting in lack of grip, resulting in loss of control slip. So slow in front of the most protection, at the same time should try to avoid hard acceleration and rapid deceleration, the urgent swing and turn. In addition, please pay attention to and the vehicle in front to keep a safe distance, wind and sand to avoid the vehicle in front tire rolled blurred vision, or even hit by sand and gravel.

Automotive brake system failure promptly resolve

Troubleshooting: Check the height of the brake pedal and the pedal force to meet the technical requirements. With a vacuum gauge to measure the value of the vacuum booster pump vacuum degree standards. To determine vacuum pump and brake master cylinder pressure is normal, then the meter to measure at the wheel cylinder. The results showed: about the difference between zero and start halve the wheel cylinder pressure difference between the vacuum booster vacuum booster and does not start (100Bar - 50Bar), and release the brake, four-wheel rotation flexibility into the oil and the oil return the amount is normal. Remove the friction block measuring a thickness of about 10mm. On the surface of the car braking system as usual, but continued examination revealed that the brake pads and the disk surface is very smooth, the replacement of the friction block and brake disc brake properly.
    Failure Analysis: friction slipping because of what?
    1 friction block material deterioration. Such as: vehicle down the process, prolonged or frequent use of the brake, the friction pad with the brake disc to the sliding friction to produce high temperature, the material of the organic polymer is decomposed under high temperature. Automotive repair and maintenance of network
    2, the brake disc is generally steel, although there are certain metal hardness, but the high temperature is not oxidized, not only the decrease in hardness, and cooling too quickly will be deformed, resulting in rapid wear of the brake disc and the disc surface roughness is reduced, and a deep trench, even if the replacement of the friction disc brake will not improve, and the deformed wheel dynamic imbalance caused jitter body.
    Friction slip case use the brake, the temperature will be higher, and will inevitably lead to brake wheel cylinder temperature increased aging of rubber parts, these are adverse factors affect braking.
    Therefore, for the hydraulic brake system of the vehicle, in addition to the routine inspection, should special attention to the surface roughness of the friction material, it is very important to guarantee the braking effect.

Air suspension system knowledge of car modification

Turning to the air suspension system most people are too distant and too upset, because in our impression that it is either to please the big boss of the high-end car ho's either ultra-running have to deal with deceleration or bad way, or is used to give the opportunity of a wildly luxury SUV. But in fact air suspension system can justifiably claim to be a "simple sound so" guy, it involves something even better than your golf turbo or DSG gearbox is much less, only improve driving comfort is far less urgent and necessary to improve combustion efficiency.
Why use air suspension?
Very simple, because the the ordinary suspension by the coil spring and shock absorber tube system hardware and software, and the high and low and can not be adjusted. Settle down after the length of the coil spring with the elastic coefficient, the height of the body with the suspension hardness characteristics also cured down can not be changed; settle down after the damping of the shock absorber tube, the suspension of the response speed and shock-absorbing characteristics are also not change.
But the problem is that the state of the vehicle with the road is ever-changing, for example, who do not want to run bad road suspension soft and comfortable corner ran a solid sound. Or longer Stingy, when the brakes if the front suspension timely hardens alleviate nod extent accelerated when the rear suspension hardens to reduce the rise of that nice body always on an even keel. To achieve the above, it would require that the entire suspension system, and even separate each wheel suspension can quickly change the damping characteristics.
On the other hand, many vehicles have the flexibility to change the body off the ground distance needs. Habit "affixed to the ground" but sports cars are most afraid of "Road see injustice", another example that require manned cargo of heavy-duty commercial vehicles. Of course, we most likely to imagine that those who need to run on both sides of the suburban off-road vehicles and SUVs. If you have seen our off-road era Scenes users should remember Q7 and Touareg inside, two of them are equipped with adjustable height air suspension system can be said to shine in the day the project inside our today's article a wealth of material.

Car tuning knowledge of the automotive ignition system

1, the ignition system functions

    (1) the battery voltage is 12V, converted into ignition system requires a very high voltage, and allocated to each cylinder.

    (2) in a timely manner to ignite the mixed gas of air and fuel inside the engine cylinder.

    Related reading:
    Talking automotive electronic stability program (ESP)
    Honda SH-AWD four-wheel-drive revolution driven Detailed
    See how Toyota Experts explain the engine speed increases
   

    2, the ignition system to the requirements of

    Engine to the effective operation of the following conditions must be met:

    Enough compression ratio, and a suitable mixing ratio, accurate and powerful ignition.

    Ignition of the basic functions of the system:

    The powerful spark (1) (2) accurate ignition timing (3) durable

    3, the ignition of the basic structure of the system

    Spark plug high-voltage distributor ignition coil controller in advance device

    4, the development of the ignition system

    Traditional ignition system: platinum contacts + cam

    Electronic ignition system: + ignition signal generator

    Computer ignition system: computer control

    The structure and principles of computer ignition system

    First, the computer the ignition system has the advantage

    1, the computer ignition system according to the various engine load situation, control the optimum ignition timing, so that the engine output power, and economy, the acceleration and exhaust emissions and so reach the ideal state;

    2, but the voltage induced as the speed increases will not decrease;

    3 does not use mechanical components, there is no mechanical error generation.

Renault CAN Clip V120 engine modification

Speaking modified appearance (such as the tail, surrounded by large) power (intake / exhaust, ECU) modification have one thing in common - they are all the external parts, and the installation process is relatively simple, mainly performance focused on the optimization of the car's original dynamic performance, the power to reduce or recovering the loss, but it does not "manufacturing power. This one, we will come to power source - the engine of the car, to see how we can realistically and to increase horsepower!
  Engine power conversion - a real modified major surgery.
   Modification of the engine's power is the most complex process in many retrofit projects, is also the most effective and the most expensive one modified, it is no wonder, the engine is basically the most expensive car parts ah. Disregarding the price aside, the internal modification of the engine is the only make the car reborn as the driving force to enhance the effect of the modification project. A people very familiar with the Volkswagen Santana engine, for example, if modified properly, this old section of the engine output power from the original 86hp (1.6 liters) upgrade to 134hp (expand displacement change with high compression pistons and high angle camshaft, etc., back we will go into the details of these parts of the role), if the use of a supercharger intake (Forced Induction) system
    Enhance engine power tips
    Even young children may all know, no fuel in the car it does not move, driving to a gas station in the fuel tank before the fuel is exhausted. The fuel consumption of the car in the majority of cases are generated much horsepower is proportional to an engine at the same time (e.g. 1 minute) can burn more gasoline, it can issue bigger the horsepower. And all of the combustion phenomenon, is injected into the engine cylinder gasoline is the need for oxygen to ignite, so the engine must be inhaled large amounts of air in order to function effectively. Fact a gasoline engine combustion powered, under different operating conditions requires about 12-15 parts of air to support combustion air-fuel ratio AFR this mentioned ECU album, (we remember?), And these air in most cases are within a cylinder, a plurality of pistons in the up-and-down movement of negative pressure generated by suction into the cylinder, because the entire process and there is no external help, therefore, this form of intake air called "naturally The gas - Normally Aspirated ", referred to as NA.

Pay attention to the ADS-1S Scanner power upgrade

With the car modification industry is booming in China, car modification is no longer very strange and distant. Car modification industry is just emerging in China, the technology is not very mature, many owners of car modification process to produce a wide variety of problems, but it can not be resolved, following the author on common misunderstanding of power conversion for everyone introduction. The car in the power upgrade include these aspects: air intake system upgrade, upgrade the exhaust system, ignition system upgrade, several aspects of the fuel supply system upgrade and engine computer upgrade.The intake system upgrade can include the following methods:First method as shown above, the replacement of high-flow air filter, the advantages of doing so is to retain the original car intake manifold, small changes to the intake system, low conversion costs; disadvantage into the air to enhance the effect of limited .The second method is to replace and models to corresponding intake kit, the general kit includes air filter housing, high-flow air filter, and more crude into the trachea Road. The advantage of this approach is the intake air amount is significantly improved and can guarantee a certain quality of the air intake; disadvantage is that high conversion costs and some of the vehicle there is no match the intake packageThe third method is to replace the models corresponding to the intake air kit and mushrooms of an intake air filtration unit. The advantage of this approach is the engine intake air to enhance immediate; drawback is the high cost of modifying difficult to ensure the quality of the design flaws of the intake mushroom intake, particulate impurities in the air may be sucked into the engine causing engine block wear increased. Many do not know how these friends directly installed on their car modified intake mushrooms, conversion would significantly improve performance, but this approach will seriously affect the life of the engine, we must weigh the pros and cons in the modification careful decision.Exhaust system, if you want to upgrade only one way is to replace the exhaust system piping, factory exhaust pipe of a moving vehicle is a certain exhaust resistance, whose role is to produce a certain amount of exhaust back pressure to ensure that the engine in low speed range torque, this exhaust system will greatly limit the performance of the engine in the high speed range, so many owners in a modified exhaust system when the blind pursuit of exhaust resistance is minimized. In fact, this is a wrong view of the exhaust pipe, if there is no resistance, then the working status of the engine in the low speed range will be very bad, If we keep on driving a vehicle in the urban areas, we will find the low-speed performance of the vehicle will be significantly lower, and exhaust resistance smaller exhaust system the greater the noise.

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The difference between the ford vcm ids aspirated and supercharged engine

With oil prices rising, and the increasingly stringent requirements of the national emission standards, more and more small-displacement supercharged engine is developed and fitted to most models, while supercharging technology is also More and more car manufacturers seriously.

  Them over the past 20 years, the turbo technology is widely used in diesel engines, but with the emissions requirements continue to increase, diesel exhaust particles are still difficult to solve problems in this stage of diesel exhaust and turbo systems.

   For the field of car modification, most people today think retrofitting turbocharged naturally aspirated engine is the best way to increase the power. Turbocharger body lower cost, and many stores also more opportunity to come into contact with the modified turbo system that most people are more likely to accept the turbo transformation. And after the installation of the turbo system, the relative power of the original car upgrade really obvious, so many owners will be more willing to own car installation set. Due to the uneven the turbocharger quality level circulation, there is a big brand in Japan, the United States, there are some small label, as well as domestic imitations and "own brand". The price of the kit is very different from 3,5 10000-10000 yuan or less, the owner of the product of choice is also scratching their heads. And various construction techniques and technical capacity of the store is different, so many owners have grave doubts on kit aftermarket car, in the end, after Bahrain How long can, in the end, after Bahrain what damage the engine, in the end to install the product What is the quality, not to mention the owners, even if a lot of their own stores are confused.Resulting in the combustion chamber of high temperature and high exhaust gas temperature due to the difference between the "software" will naturally aspirated engine installed after the turbo, and the increasing phenomenon of knocking and the exhaust valve life will be extremely shortened. In simple terms, to the naturally aspirated engine installation of turbo power squeeze PYLL consideration.Heat, as we all know, caused the biggest problem is the high temperature of the turbocharged engine, supercharged engine will naturally have better cooling capacity. All turbocharged engine with oil nozzle in the piston below will come to each piston cooling. Also a big difference in the design of the cylinder waterways, total waterway length is much longer than the general turbocharged engine cylinder naturally aspirated engine.

What is the technical suspension

Air Suspension (Air suspension), commonly known as "air shock, an active suspension is developed in 1960s. Suspension stiffness and damping can change according to the driving conditions of the car (the state of motion of the vehicle and road conditions, and load, etc.) and dynamic adaptive adjustment of the suspension system is always in the best damping state. For example, the high-speed driving suspension can harden, to improve vehicle stability, low speed for long periods of time, the control unit will think through bumpy roads, the suspension softened to improve ride comfort. 
As we all know, the core components of the suspension shock springs and shock absorbers. The air suspension is also no exception, gas springs and adjustable damping shock absorbers make up the main body of the air suspension. First introduce the gas spring, the gas spring is in a sealed container into the compressed gas, the use of the compressibility of gas to achieve the action of the spring. Such stiffness of the spring is variable, because the role in the load on the spring is increased, the the quantitative gas within the container is compressed, natural increase stiffness; contrary. Load is reduced, the reduction in pressure, the stiffness of the spring naturally reduced. From the classification point of view.  Air spring and oil and gas spring two gas springs, air springs can be divided into the capsule spring and membrane spring. 
There are two types of damping adjustable shock, a hydraulic damper, an inflatable shock absorber. Common hydraulic variable damping shock absorber electromagnetic hydraulic shock absorber, it is detected by the ECU to the need to "harden" makes electromagnetic liquid particles energized by the disorder to the neatly arranged, because the relative particle pole relationship difficult to compress compression, damping, it is hard; Similarly, if it is "softened" ECU cancel energized instructions will let the electromagnetic liquid particles lose their magnetism again, damping becomes smaller, and at this time will be very soft. 

The air suspension system uses sensors to detect cars traveling the state. For example, when the left turn of the vehicle, the body under the action of centrifugal force For tilted to the right, then the ECU will be collected and processed by the data of the various sensors, to issue control instructions to the front and rear solenoid  valves, so that the outer wheel of the air spring pneumatic so that the inside wheel of the air spring is deflated, i.e. opposite to the body roll force, to resist the vehicle body roll.