What is the function of injector gasket?
The function of the fuel injector gasket is to better seal the fuel injection nozzle and the cylinder head, and at the same time, it can also protect the plane of the fuel injection nozzle hole in the cylinder head from being easily damaged. Damage to the gasket will cause the cylinder head to be laxly sealed. At this time, only Replace the injector gasket.
A broken fuel injector will cause the fuel injector to not work properly, resulting in serious carbon deposits in the engine cylinder, accelerated wear of the cylinder barrel and piston rings, resulting in unstable idle speed, increased fuel consumption, weak acceleration, difficulty in starting, excessive vehicle emissions, etc., which are serious. or even damage the engine.
Car owners all know that whether the fuel injector is normal will affect the performance of the engine. If the fuel injector is clogged, it will seriously affect the performance of the car.
The cause of clogging is due to carbon deposits in the engine, which are blocked on the fuel injector or due to impurities in the fuel that block the fuel injector passage. After a car has been driven for a period of time, certain deposits will form in the fuel system. The formation of deposits is directly related to the car’s fuel, so car owners should also pay attention to cleaning the fuel injectors.
What is the reason why the car’s fuel injector is stuck?
- The oil is not clean, and there are impurities in the high-pressure oil pipe, which causes the needle valve assembly to not close tightly, and the high-pressure gas in the combustion chamber to flow back, burning out the needle valve assembly. In addition, the dirt on the injector pressure regulating spring, tappet and other parts has moved to the upper part of the injector needle valve through the injector tappet, or the cotton rope and lead wire used to prevent oil leakage on the oil line have entered through the high-pressure oil pipe. The fuel injector will cause the needle valve assembly to become stuck.
- The machine temperature is too high and the fuel injector is poorly cooled, causing the oil delivery valve to become stuck. The oil supply time is too late, the cooling water channel has too much scale or is blocked, the water pump impeller end face is worn, and the engine is overloaded for a long time. overheat.
- The oil outlet valve is worn, causing the injector to drip oil when it stops injecting fuel, causing the injector to burn coke and deposit carbon, causing the injector to become stuck.
- When installing the fuel injector, the gasket is missing or damaged, causing air leakage and causing the local temperature of the fuel injector to be too high and become stuck.
- The fuel injection pressure is too low, causing high-pressure gas to flow back in the combustion chamber.
- Parts manufacturing reasons, such as the injector mounting hole on the cylinder head is too tight with the injector, the gap between the needle valve body and the mounting hole on the cylinder head is too small, the injector mounting hole on the cylinder head is processed too deep, etc.
