Introduction to the knowledge of ZTE’s automobile structure and maintenance

The combustible mixture of a gasoline engine is initially ignited by high pressure.Then, the burning flameSpark plugAs the center, it spreads outwards and ignites the mixture in the combustion chamber. This combustion process is normal combustion. If the remaining air-fuel mixture ignites without being ignited before the flame reaches, this kind of combustion is called knocking, which means abnormal combustion. It is not allowed to happen during normal operation. It will cause increased abrasion, shortened service life, and even rapid destruction of various parts of the engine cylinder block. It will also reduce engine power and increase fuel consumption.
The phenomenon of explosion: (1) Knocking will suddenly produce shock waves in the cylinder, which will impact on all sides, causing the engine topiston, Cylinder wall, connecting rod,CrankshaftWhen strong vibration occurs, irregular metal knocking sounds occur; (2) The temperature of the cooling system is too high; (3) The fuel burns incompletely, and there is black smoke in the exhaust gas; (4) The engine power decreases and fuel consumption increases.The following measures can be taken to prevent: (1) reduce the ignition advance angle; (2) use gasoline of a grade (octane number) that meets the regulations; (3) remove carbon deposits in the combustion chamber; (4) if it iscarWhen knocking occurs uphill, shift to low gear in time; (5) When the car starts, do not shift to direct gear prematurely. (6) When the engine is overloaded and exploded, turn offThrottle, Can also play a role in reducing knock.