With electronic technology andcarThe rapid development of science and technology, as the main air supply part of the launch——Carburetor, Has beenThrottle(Also called throttle valve) instead.When a car has driven hundreds of thousands of kilometers, it is oftenValveDuring the peak period of damage, its failure phenomenon is that the engine idling is easy to stall, the idling speed is unstable, and the idling speed is too high. It is not like the previous carburetor that can be repaired casually. From the perspective of its structure, the entire valve body can only be replaced after it is broken.
The main cause of throttle failure is the idling motor (also called idle speed), the core component of the throttle.motor)damage. The function of the idling motor is to continuously change the idling position signal by receiving the output signal of the ECU according to various idling conditions in the engine, so that the ECU can automatically correct the idling fuel supply to ensure the stable idling of the engine. Once the idle speed motor signal is interrupted or the motor is damaged, the throttle valve of the throttle body enters the mechanical emergency state through the emergency spring. The current maintenance method is to replace the throttle. In fact, the most effective way to repair the throttle is to replace the throttle motor. When the throttle is broken, just replace it with a new motor and it will work normally. This saves resources and reduces expenses.The following ispublicThe throttle of the car series is an example to introduce how to replace the idle speed motor.
From its appearance, it seems that the motor cannot be taken out without destroying it. In fact, it is not so easy, as long as we find its breakthrough. Prepare some corresponding tools, remove the rear cover bolt, take out the back cover, remove the two bolts of the throttle terminal, pull out the terminal a little, and erect it a little. Through careful observation, you will find a small hole next to the terminal. This hole is actually the positioning shaft hole for the transition gear shaft between the throttle idle motor and the throttle idle potentiometer. What we have to do now is to use this small hole to punch out the gear shaft to facilitate the removal of the gear. Find a screwdriver with a higher hardness, polish it to the appropriate size, and punch out the gear shaft so that the intermediate gear can be taken off. The next step is to take out the circuit board covering the motor, but half of it is blocked by the throttle idling potentiometer gear and cannot be taken out completely. It can only be cut off at the position shown in the figure, and then use a small screwdriver to gently pry up the circuit board along the edge of the idle motor. Take the circuit board open aside. Remove the screws of the positioning plate on the motor, take out the positioning plate, and the motor can be taken out. Do some cleaning, prepare a new motor, and install it in the reverse order of disassembly. At this point, our process is all over.
According to the above example, it is not difficult to change a throttle motor.However, in the entire operation process, you must be careful and serious, and you can't be too hasty, because the throttle is a relatively precise part, and the position of the throttlesensorAnd idle positionsensorIt can’t be impacted by any external force, the carbon film inside the throttleresistanceThere can be no scratches. The most important point is that the polarity of the motor cannot be reversed, otherwise all previous efforts will be lost.
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