Diesel Fuel Injector Common Rail Injector 235-2888 /10r-7224 10r7224 Compatible with Caterpillar C9 Engine

The injection pressure of the fuel injected into the cylinder is mainly guaranteed by the injector. The fuel injection pressure refers to the pressure when the needle valve is just opened. The injection pressure of each engine injector is obtained through rigorous calculation and testing to ensure the most efficient work of the injector and the engine. Before the piston reaches the top dead center in the compression stroke, the engine injects fuel into the cylinder and quickly mixes it with high-temperature and high-pressure air to form a combustible mixture, which then burns. This process is extremely short, so there are strict requirements on the injection pressure of the injector
1.1 Harm of too low fuel injection pressure
When the fuel injection pressure is too low, the residual pressure in the high-pressure fuel pipe decreases, and the fuel injection pressure of the fuel injection pump does not reach the maximum. The needle valve of the fuel injector starts to inject fuel, which reduces the maximum fuel injection pressure of the fuel injection pump, reduces the fuel injection speed, spray cone angle and range, and increases the fuel injection volume, resulting in poor atomization and even oil dripping As a result, fuel consumption increases and combustion is not complete. The car has black smoke, carbon deposits, reduced power, difficulty in starting, etc. 1.2 Harm of excessive fuel injection pressure
The residual pressure in the fuel injection pipe increases, and when the fuel injection pressure exceeds the maximum fuel supply pressure of the fuel injection pump, the needle valve of the fuel injector starts to inject fuel. Aggravate the wear of the fuel injection pump and fuel injector, resulting in increased fuel injection leakage loss, reduced fuel injection volume, shortened fuel injection duration, increased fuel injection rate, resulting in engine failure.