1. Introduction
enters a throttle valve is controlled to control the air valves of the engine, will be blended into gasoline and a combustible gas mixture enters the gas inlet pipe, so that combustion work. It is then the air filter, then under the engine block, known as the throat of an automobile engine. Traditional throttle cable and electronic throttle two kinds of conventional engine throttle by a cable mechanism (soft steel), or rod, having one end connected an accelerator pedal, and the other end connected to the throttle interlocking plate work. Mainly through the electronic throttle throttle position sensor, according to the required engine power, controlling the opening angle of the throttle valve, thereby adjusting the size of the intake air amount.
the throttle valve
2, the throttle valve cleaning
of the throttle member is today the most important EFI car engine system, he is an upper air filter, the lower portion It is the engine block, throat automobile engine. The car acceleration is flexible, and the throttle cleaning is very related. The throttle should not be removed to clean, owners are much discussed focus.
When the washing
of the throttle is not particularly limited, it is generally clear the idle instability. With the car’s air environment, using the type of oil, air filter replacement interval, driving habits have a relationship. Most people when conditions start to deteriorate (idle instability, cold start the engine shake obvious) was clean, in fact, recommend can find a familiar repair shop, from time to time, the computer connected to the opening of the throttle valve of the query (generally do not have the money ), if the opening degree is within 5 percent, which is not clean, if the percentage exceeds 5, the cleaning.
a Excelle owners ask experts to:
Ask the experts, my car is 1.8 Excelle, I went to clean the throttle 4S requirements, why not be removed to clean 4S , say this not-for-pillow sheet, that is, the intake side of this mess spray carburetor cleaner to complete, but not removed at all clean is not clean, not clean at all because of the back, as well as idling motor must be removed before cleaning clean, remove the nozzle in addition to clean, OK?
Liu Beijing SAIC Angelina Expert response as follows:
Note that the problem:
can not be disassembled when cleaning the throttle, but must take into clean steam sealing site, idle speed motor must be removed to be able to clean, wash nozzle lending and their pros and cons to avoid demolition, repair stations free washable recommended under normal circumstances, to prevent other unnecessary waste occurs, such as the need to replace the removed seals or other responsibilities pad installation, or leakage occurs in the slice responsible for the disassembly process, the gas and so the time delay of the owner.
If the throttle too much sludge may cause poor engine acceleration, increased fuel consumption, vehicle owners is a big worry, then the throttle is dirty how to handle it? Cleaning to become, to the 4S shop will soon be able to get, but do not always have to be cleaned to the 4S shop it? In fact do not, you can get yourself, just do not forget to initialize.
When the throttle valve cleaning, first remove the intake pipe, the throttle valve is exposed, the negative electrode battery removed, the ignition switch is turned off, the throttle flap straightened, the throttle valve to discharge a small amount of “oils cleaning agent “and then spun polyester cloth or a high” nonwoven “careful scrubbing, deep throttle, out of reach of the hand can be clip-rag wipe carefully.
After
After cleaning, then in accordance with the procedure just detached, installed after the throttle to begin initialization, after cleaning the throttle, the initialization is necessary, because the computer when the throttle opening degree is adjusted, there is memory function, as before clogging sludge, in order to ensure the intake air amount, the computer will automatically adjust the degree of opening of the throttle, so that the intake in the normal state.
After the washing, no sludge clogging, also maintained if the throttle valve opening degree before, it will result in excessive intake, the consequences that engine is started jitter, and weak acceleration, It is also possible engine fault lamp lit.
Why do not clean the throttle sometimes after initialization engine can work it? That is because the throttle valve is not dirty, after cleaning, its intake has not changed much. However, after cleaning the throttle changes and can not be observed by the naked eye, so you should do some initialization.
In fact, the initialization is very simple, can be done through a dedicated computer, you can manually do the same, but not as good as hand-made computers faster, sometimesFailure, failure does not matter ah, do it again on the line. Depending on the method of doing initialization of the vehicle, there are two methods: the
The first gear is a second key opening, is fully lit indicating that the instrument block, and then wait 20 seconds, the throttle in the end, after holding 10 seconds, loose throttle, the ignition switch is off, remove the key, initialization is completed.
The second gear is a key to open the second, 30 seconds, then turn off the ignition switch, remove the key. Note that the latter two methods done, must wait for some time before they can try to ignition, typically 15-20 seconds to wait before ignition, fuel is normal to see, whether the engine fault light is off, If unsuccessful, to do the second time, has been successful so far, it can generally be successful, most secondary.
However, depending on the car, reduction method is not the same, some cars must be initialized by the computer to complete, if that is the case it is recommended that car owners will have to shop specialized equipment go clean.
3, failure
How to clean and preventing maintenance problems talk throttle
configuration of the electric throttle valve can be divided into several parts be categorized into: a throttle valve, an electromagnetic actuator, the potentiometer the controller (some not, directly from the ecu tube, wherein the bypass valve failure which two types: hard and soft fault fault fault refers to hard mechanical damage, soft failure refers to dirt, disorders
hard fault potentiometer resistance portions is to spray a layer of carbon on a substrate film made of polyester, which is actually a very low preparation process, durability is not high. to put it plainly, as we normally do not add potentiometer! sliding contacts a row of dots inverse claw fine steel, attention! anti pawl! this is simply worse! Further, the carbon film that is not coated with the protective agent, carbon powder falling cause poor contact, lights are inevitable! once repaired a carbon film is scraped leak, also seventy thousand kilometers, that Zhuer feet owe!
soft fault we are often plagued by cleaning the throttle, because most of the time the throttle opening is too low. air at high speed ( Ten to several hundred m / sec) flowing through the throttle gap, the gradual accumulation of dust on the air flow generatedIt affects more than the ability to regulate the throttle. Cause
4, cleaning errors
should be removed to wash! Some cleaning correction throttle Mistakes!
formed from the main throttle valve fouling oil vapor, followed by particles in the air and water, that is to say in the case considered qualified and remove the empty crankcase ventilation tube, throttle dirty much slower speed. Built crankcase crankshaft, connecting the lower end of oil, the working temperature in this section is about 100 ° ~ 180 °. Oil may be thermally volatilizable, in use, the longer the time, the higher the temperature, the more volatile, how much compressed air cylinder coupled to the crankcase will squeeze through the gap of the piston ring, it is necessary to let go of a gas passage, or end of oil will form a positive pressure (see specific situation “night Walker” related articles). Cause crankcase vent pipe is connected to the throttle on the one hand the requirements of environmental protection, on the other hand the negative pressure of the intake gas extracted from the crankcase. When reaching the cooling oil inlet pipe of steam, which condenses on the oil inlet and the throttle, whereupon the steam entrained soot will be deposited at these sites, since the throttle opening slit maximum air flow, a small space The gas temperature at the end, so it is easy to condense most part.
Accordingly, the throttle depends on how long it will be stolen air quality into account, the use of oil brand, quality, driving road conditions, air temperature conditions, engine operating temperature, driving habits and other aspects. Even on the individual, can not be a fixed number of kilometers to determine a throttle cleaning time, car washing first throttle longest interval, after due crankcase vent tube and continuous intake of hydrocarbon condensate, cleaning frequency It will increase, and different weather also affects the throttle dirty speed.