What is a vehicle throttle? The car throttle connects the air filter and the engine oil pan, which is called the throat of the engine. Throttle fouling is mainly caused by car oil vapors, followed by particulates and moisture in the air. In other words, when a qualified air filter is applied and the crankcase vent pipe is removed, the efficiency of throttle theft will be slower. many.
Let’s take a look at the solutions to common vehicle throttle failures.
The throttle valve is a controllable valve that manipulates air into a car’s engine. After entering the air intake, the vapor will be mixed with gasoline to form a flammable mixture, which will then ignite the process. It connects to the air filter and the engine oil pan, and is called the throat of the engine. Throttle There are two types of traditional pull-wire and electronic throttle. The actual operation organization of the traditional automobile engine throttle valve is based on the cable (soft wire) or support rod, one end is connected to the accelerator, and the other end is connected to the throttle connection plate. The key of the electronic device throttle valve is based on the throttle valve phase sensor, and the opening angle of the throttle valve is manipulated according to the force required by the automobile engine to adjust the air intake and supply volume.
Throttle classification.
There are four types of electronic throttle valve: hydraulic push rod type, linear solenoid type, servo motor type and DC servo motor type. As everyone knows, because of low precision, the linear electromagnetic induction type is rarely used in vehicles, because the required function loss is large. The DC servo motor type gets rid of the above two conditions, so it is used in vehicles. In addition, the throttle valve needs to be replaced regularly. The key to the length of time is the quality of the air filter, the quality of the car oil, and the real-time road conditions of the car.
Maintenance of the throttle valve.
The main factor of throttle valve contamination is from automobile oil vapor, followed by particulate matter and water in the air, that is, when applying standard air filter device and removing crankcase ventilation pipe, the environmental pollution theft rate of throttle valve will be much slower. The crankcase ventilation is embedded in the engine crankshaft, and the bottom is connected to the oil bottom. The working temperature is about 100°~180°. The oil is heated and evaporated throughout the application. The longer the use time, the higher the temperature, the stronger the volatiles. In addition, the compressed air of the cylinder will be squeezed into the crankcase ventilation according to the gap of the engine piston, so there needs to be a safe channel to release the gas, otherwise the oil bottom will generate positive pressure (see the relevant article of the evening traveler for details. ). The factors that connect the crankcase ventilation pipe to the throttle valve are environmental protection regulations on the one hand, and the extraction of vapours from the crankcase ventilation according to the negative inlet pressure on the other hand. When the oily vapor reaches the intake, it will turn cold, the oil will solidify on the intake and the throttle, and the carbon that is subsequently stirred in the water vapor will also settle in those places, due to the total amount of air in the air gap when the throttle is opened. The flow is the least and the air temperature is the lowest, so this part is most prone to solidification.
Therefore, how long the throttle valve is dirty depends on the quality of the air filter device, the well-known brand of oil used, the quality, safe driving road conditions, air temperature conditions, the temperature of the car engine during operation, and safe driving habits. Even on a personal level, there’s no way to use steady mileage to tell when the throttle is flushed. New cars have the most spacing to clear the throttle for the first time. In the future, due to the continuous solidification of the oil and gas in the crankcase ventilation pipe and the air intake, the cleaning frequency will increase, and different temperatures will also affect the dirty rate of the throttle valve.
Throttle valve common failure.
general
The composition of the electric throttle valve can be roughly divided into one-way throttle valve, electromagnetic induction controller, sensor, control board (some are not, immediately by ECU pipeline, bypass valve. Its problem characteristics are divided into hard common faults and soft faults There are two categories. Hard common faults refer to the destruction of mechanical equipment, and soft faults refer to stains, confusion and so on.
Hard common fault
A part of the resistor of the sensor is a carbon film painted on the polyester substrate, which is actually a very poor preparation and processing technology, and the wear resistance is not high. Straight to the point, it’s not as good as the resistors that everyone usually adds! The rolling contact point is formed by a row of fine rigid anti-claw, be sure to pay attention! It’s an antipaw! This is even worse! In addition, there is no protective film on the carbon film, the falling carbon powder will cause poor contact, and the light source is unavoidable! Once a carbon film is repaired and scratched, there are only more than 70,000 kilometers, and the main foot is also owed!
soft fault
Because most of the time the throttle opening is too low, people are often confused by clearing the throttle. The air passes through the gap of the throttle valve at a very high speed (tens to five hundred meters per second), and the slowly accumulated dust is harmful to the total air flow beyond the adjustment capacity of the throttle valve.