The throttle is one of the most important auto parts of the modern EFI engine system, and it is also the focus of the car owners. Whether you go to a 4S shop or a repair shop, there are always people who recommend cleaning the throttle, but spend a few dozen on a few dozen, so that people who don’t understand it can’t decide. I’ll give you a brief introduction. Knowledge about the throttle.
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Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
| The throttle is one of the most important auto parts of the modern EFI engine system, and it is also the focus of the car owners. Whether you go to a 4S shop or a repair shop, there are always people who recommend cleaning the throttle, but spend a few dozen on a few dozen, so that people who don’t understand it can’t decide. I’ll give you a brief introduction. Knowledge about the throttle. 1. What is a throttle? A throttle is a controllable valve that controls the entry of air into the engine. When the air enters the intake pipe and mixes with the gasoline, it becomes a combustible mixture and participates in combustion. The upper part is the air filter and the lower part is the engine block, which can be said to be the throat of the car engine. Whether the acceleration of the car is flexible and whether the idle speed is stable has a certain relationship with the degree of cleanliness of the throttle. Second, the type of throttle Thyristor is divided into two types: pull-wire throttle and electronic throttle. The traditional engine throttle operating mechanism is connected by a cable (throttle cable) or a pull rod, one end is connected to the accelerator pedal, and the other end is connected to the throttle linkage plate. The electronic throttle mainly controls the opening angle of the throttle according to the energy required by the engine through the throttle position sensor, thereby adjusting the amount of intake air. At present, the pull-type throttle has been gradually eliminated, and more advanced electronic throttles are becoming more and more. Third, cleaning the throttle cycle How long the throttle will be dirty depends on the quality of the air filter, the quality of the oil, driving conditions, air temperature, engine operating temperature, driving habits and so on. Even in the case of individuals, it is not possible to determine the time to clean the throttle with a fixed number of kilometers. The new car has the longest throttle interval for the first cleaning. Later, due to the continuous condensation of oil and gas in the crankcase ventilation pipe and the intake port, the frequency of cleaning will increase, and the weather will also affect the speed of throttle fouling. Therefore, it is inaccurate to determine the interval of cleaning the throttle by the number of kilometers. Generally, when there is an idling instability, traveling, accelerating or collecting the vehicle, and extinguishing the fire, it is necessary to consider whether the throttle is dirty. Fourth, the throttle cleaning method The specific cleaning method of the throttle can refer to another article on how to clean the throttle. By the way, some of the repair shops or 4S shops use the method of scrubbing on the spot without dismantling the throttle. After the owner of the car meets this, don't go to the store again. Fifth, how to prevent the throttle from getting dirty too early 1. Try to reduce the time of the car in the same place. 2. Use manual transmission models to avoid high-end low-speed driving, and should shift gears above 2000 rpm. 3. Less traffic jams and more high speed. 4. Air filter should be changed frequently, not to use inferior air filter. 5. Use a suitable oil. Why the cleaning throttle should be initialized For the electronic throttle, the throttle initialization after cleaning is a must. Because the computer adjusts the throttle opening, it has a memory function. Because of the previous blockage of the sludge, in order to ensure the intake air amount, the computer will automatically adjust the opening of the throttle to make the intake air in a normal state. After cleaning, there is no blockage of the sludge. If the throttle valve maintains the previous opening degree, the intake air amount will be too large. If the initialization is not performed after the throttle is cleaned, the operation of the electronic control unit and the idle speed control component may be uncoordinated. The performance is that the idle speed control is inaccurate and unstable, such as the idle speed is high. However, this kind of bad performance is only temporary. This is because the electronic control unit has the function of learning and adapting automatically, but this learning and adaptation process is not as fast and accurate as the initialization. After cleaning the throttle, some models not only need to be initialized, but also clear the original learning value. This is related to the computer software of the model. Seven, the method of manually initializing the throttle The initialization method has two main types depending on the car: Open the second gear, that is, the indicator that the instrument indicates full light, then wait 20 seconds, then step on the throttle, hold it for about 10 seconds, then loosen the throttle, turn off the ignition switch, pull out the key, and the initialization is complete. 2. Turn on the second gear of the key for 30 seconds, then turn off the ignition and pull out the key. It should be noted that after the two methods are completed, they have to wait for a while before they can try to catch fire. Generally, they can wait for 15-20 seconds, then fire them to see if the idle speed is normal. If it is not successful, Do it for the second time until it is successful. However, depending on the model, the method of restoration is different. Some cars must be initialized by computer. If it is the case, it is recommended that the owner send the car to a shop with professional equipment for cleaning. Http://?&fid=54&id=1831 For more information, please pay attention: autohao128 |
Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
During the production of highway painting, put glass bead into paint based on the ratio of 18-25% (weight percentage), so that the highway paint can still keep reflectivity during wear and friction. The ratio is refer to the specification of Communication Industry Standard of the People`s Republic of China No. JT/T280-2004, the standards which is different in different countries and areas.
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The appearance of glass bead should be colorless, loosen and spherical particle, should be clean without impurity, and without agglomeration |
According to the specification of Communication Industry Standard of the People`s Republic of China No.GB/T24722-2009, the granulometry is shown in the table below:
The glass bead can be produced based on the standard of countries or areas, such as EN1423/1424, AASHTO M247, BS6088, JIS R3301 and KS L2521 etc.
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