Function of throttle valve maintenance of throttle

2022-07-22
  • Detail

In fact, the throttle is often referred to as the accelerator, which is controlled by the accelerator pedal to adjust the intake of air. At present, there are mainly two types: mechanical - by stepping on the accelerator pedal, driving the steel cable connected with the throttle under the pedal to open and close the throttle; There is no traditional cable connection between the electronic throttle, accelerator pedal and throttle, but it is controlled by electronic sensors, which has higher control accuracy and improves the phenomenon of throttle hysteresis. Then, let's introduce the function and maintenance of throttle valve

the throttle is actually the accelerator, which is controlled by the accelerator pedal to adjust the intake of air. At present, there are mainly two kinds: mechanical &mdash& mdash; By stepping on the accelerator pedal, drive the steel cable connected with the throttle under the pedal to open and close the throttle; There is no traditional cable connection between the electronic throttle, accelerator pedal and throttle, but it is controlled by electronic sensors, which has higher control accuracy and improves the phenomenon of throttle hysteresis. Then, let's introduce the function and maintenance of throttle valve

function of throttle valve

1. Relieving effect. Release position when the pressure of the action pipe under the action piston drops, the action piston drives the hollow valve rod to move down under the pressure of the brake cylinder and release spring. The upper end of the hollow valve rod leaves the bottom surface of the air supply valve and opens the exhaust valve port. The pressure air of the brake cylinder above the piston is discharged to the atmosphere through the central hole of the air valve rod, and the locomotive is in a release state

2. Pressure maintaining effect. When the pressure of the acting tube under the piston increases, the acting piston and the hollow valve rod move up. First, the upper end of the hollow valve rod is closely attached to the bottom of the air supply valve, and the exhaust valve port is closed. Then, the air supply valve is jacked open to open the air supply valve port

3. Braking effect. In the braking position, as the pressure of the brake cylinder continues to rise, the pressure above the acting piston also gradually increases, the acting piston gradually moves down under the action of the pressure of the brake cylinder above it, the release spring and the spring pressure of the air supply valve, and the opening of the air supply valve gradually decreases

maintenance of throttle valve

the main reason for the formation of throttle valve dirt is oil vapor, followed by particles and moisture in the air, that is, when qualified air filter is used and crankcase vent pipe is removed, the speed of throttle valve dirt will be much slower. The crankcase has a built-in crankshaft, and the lower side is connected to the oil bottom. The working temperature of this part is 100 DEG ~ 180° about. The oil will be heated and volatilized during use. The longer the use time is, the higher the temperature is, the stronger the volatilization is. In addition, the compressed gas of the cylinder will be squeezed into the crankcase through the gap of the piston ring, so there must be a channel to release the gas, otherwise the oil bottom will form positive pressure (for details, please refer to the relevant articles of “ Night Walker &rdquo. The reason why the crankcase vent pipe is connected to the throttle valve is, on the one hand, environmental protection requirements, and, on the other hand, the negative pressure of the intake air is used to extract gas from the crankcase. When the oily steam arrives at the intake pipe, it becomes cold, and the oil in it will condense on the intake port and throttle, and then the carbon deposits in the steam will also be deposited in these parts. Because the gap where the throttle is opened has the largest air flow, small space, and low gas temperature, this part is most easy to condense

therefore, how long the throttle will be dirty depends on the quality of the air filter, the brand and quality of the oil used, the driving road conditions, the air temperature conditions, the engine operating temperature, driving habits and many other aspects. Even for individuals, it is not possible to use a fixed number of kilometers to determine the time of cleaning the throttle valve. The first time a new car cleans the throttle valve, the interval is the longest. Later, due to the continuous condensation of oil and gas in the crankcase vent pipe and intake port, the cleaning frequency will increase, and different weather conditions will also affect the speed of throttle valve fouling

cleaning of throttle valve

1. It can effectively clean and dredge the colloid and carbon deposit of the fuel injection nozzle and keep the fuel system clean

2. It can clean the exhaust gas circulation system, reduce exhaust gas emissions and save fuel, so as to effectively protect the oxygen sensor and three-way catalytic converter

3. It can help prevent knock, unstable idle speed, poor acceleration and other symptoms caused by colloid and carbon deposition

4. It can eliminate carbon deposition in valve seat, lubricate valve and valve guide, improve sealing, restore cylinder pressure and improve power

5. It can blow out the carbon deposit in the combustion chamber, lubricate the upper area of the cylinder, reduce the wear of the piston ring and prolong the service life

editor's summary: that's all for the function and maintenance of throttle valve. I hope it can be helpful to you. If you want to know more about it, you can pay attention to the information

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