Excessive or insufficient valve clearance can have adverse effects on the performance and lifespan of the engine. The following is a specific analysis of the harm: excessive valve clearance
1. Impact on intake and exhaust efficiency: - Decreased intake valve opening, shortened opening time, resulting in insufficient inflation and decreased engine power- The exhaust valve opening decreases, the opening time is shortened, the exhaust is not smooth, the exhaust gas in the combustion chamber increases, and the engine economy deteriorates.
2. Decreased power performance: Late opening and early closing of valves, insufficient intake, and poor exhaust directly lead to a decrease in engine power.
3. Noise and wear: Excessive valve clearance can lead to increased collision and wear of valve components, and may also generate significant noise.
4. Startup and operation issues: Excessive valve clearance may also affect the engine's startup performance and operational stability. The valve clearance is too small
1. Difficulty in starting: When the valve clearance is too small, the rising and falling speed of the piston will slow down, causing difficulty in starting the engine and prolonging the starting time.
2. Reduced power: - The valves cannot be effectively opened, and the pistons cannot effectively absorb fuel and oxygen, resulting in reduced engine power and weak driving of the car.
3. Noise and wear: Although a small valve clearance itself does not directly generate noise, it may cause air leakage due to loose valve closure, which can lead to other noise problems. At the same time, air leakage can also exacerbate the wear of valves and valve seats.
4. Increased emissions: When the valve clearance is too small, the valve will not be able to effectively control emissions, resulting in increased emissions and affecting the environmental performance of the car.
5. Oil problem: When the valve clearance is too small, the pressure in the high-pressure oil circuit will be too high, which may prevent the oil from entering the piston well and cause the oil to burn out.
The adjustment of valve clearance is crucial for the performance and lifespan of the engine. Excessive or insufficient valve clearance can cause a series of problems, so in practical applications, it is necessary to strictly adjust according to the recommended values of automobile manufacturers. At the same time, regular inspection and maintenance of valve clearances are also important measures to ensure the normal operation of the engine.