What is a Throttle?

Throttle valve is a controllable valve that controls the entry of air into the engine. After the gas enters the intake pipe, it will be mixed with gasoline to become a combustible mixture, which will burn to form work. It is connected to the air filter and the engine block, which is called the throat of a car engine.

Throttle valve is a controllable valve that controls the entry of air into the engine. After the gas enters the intake pipe, it will be mixed with gasoline to become a combustible mixture, which will burn to form work. It is connected to the air filter and the engine block, which is called the throat of a car engine.

Throttle four stroke

There are two types of throttles: traditional cable-type and electronic throttle. The traditional engine throttle control mechanism works through a cable (soft steel wire) or a tie rod. The electronic throttle mainly uses the throttle position sensor to control the opening angle of the throttle according to the energy required by the engine, thereby adjusting the amount of intake air ^[1]

How to clean and prevent:

1. Disassembly and cleaning should be performed;

2. Correct some cleaning errors of the throttle;

3. Formation

Pay attention

If the throttle valve has too much sludge, it may cause the engine to fail to accelerate and increase fuel consumption, which is a major worry for owners. So what to do if the throttle valve is dirty? Cleaning is done, go to 4S shop soon

The composition of the electric throttle valve can be roughly divided into the following parts: throttle valve, electromagnetic driver, potentiometer, controller (with or without direct control by ecu), bypass valve. Its fault characteristics are divided into two categories: hard faults and soft faults. Hard faults refer to mechanical damage, and soft faults refer to dirt, misalignment, etc.

Hard throttle failure

The resistance part of the potentiometer is formed by spraying a layer of carbon film on a polyester substrate. This is actually a very low-level preparation process and the wear resistance is not high. To put it plainly, it is not as good as the potentiometer of our usual home appliances. The sliding contact consists of a row of stainless steel anti-jaws. Note that it is an anti-jaw! This is even worse! In addition, no protective agent is applied on the carbon film, and the falling carbon powder causes poor contact, and lighting is inevitable.

Soft throttle malfunction

Everyone is often troubled by the cleaning of the throttle because the throttle opening is too low most of the time. The air flows through the throttle gap at a high speed (tens to hundreds of meters / second), and the effect of gradually accumulated dust on the air flow exceeds the throttle adjustment capacity ^[1] .