Phenomenon and solution of knock fault of gasoline engine

Phenomenon and solution of knock fault of gasoline engine

The combustible mixture of gasoline engine is initially ignited by high pressure. Then, the burning flame spreads outward around the spark plug and ignites the mixture in the combustion chamber. This combustion process is normal combustion.

If the mixture left in the room ignites itself before the flame arrives, this combustion is called detonation.

When the engine is running normally, knocking is not allowed, which will lead to increased wear and tear of engine cylinder parts, shortened service life and even rapid destruction, and will also reduce engine power and increase fuel consumption. The phenomenon of knocking

Detonation will suddenly produce shock waves in the cylinder, which will impact in all directions, making the piston, cylinder wall, connecting rod and crankshaft of the engine vibrate strongly and produce irregular metal knocking sound;

The cooling system temperature is too high; Incomplete combustion of fuel and black smoke in exhaust gas; The power of the engine is reduced, which makes the fuel consumption increase. solution

Reduce the ignition advance angle; Use brand gasoline that meets the requirements; Removing carbon deposits in the combustion chamber; If the car knocks uphill, it should be shifted into a low gear in time;

When you are in automatic start, don't shift into direct gear prematurely. When the engine explodes due to excessive load, turning down the throttle can also play a role in reducing knocking.