What is injection timing?
The fuel is injected into the inlet manifold of each cylinder at different timings. The timing at which the injection of the fuel takes place inside the inlet manifold is called the injection timing.
How injection timing works?
For any number of cylinder engine, the injection has done one by one cylinder. In one cylinder, the piston moves up from BDC to TDC during the exhaust stroke. Just before the piston reaches TDC during this exhaust stroke, injection of the fuel takes place into the inlet manifold of this cylinder at about 600 crank angle before TDC. This injected fuel mixes with the air in the air intake chamber. Thus the air-fuel mixture is obtained. In a suction stroke, the intake valve opens and the fuel-air mixture is sucked into the cylinder.
According to the firing order, the injection of the fuel takes place inside the inlet manifolds of the other cylinders at various timings.
The ECU plays the key role in injection timing it calculates the appropriate injection timing for each cylinder. In order to meet the operating condition, the injection valve is kept open for a longer time by ECU. In the case of accelerating condition, the injection valve will be opened for a longer time to supply additional fuel to the engine.
The fuel is injected into the inlet manifold of each cylinder at different timings. The timing at which the injection of the fuel takes place inside the inlet manifold is called the injection timing.
How injection timing works?
For any number of cylinder engine, the injection has done one by one cylinder. In one cylinder, the piston moves up from BDC to TDC during the exhaust stroke. Just before the piston reaches TDC during this exhaust stroke, injection of the fuel takes place into the inlet manifold of this cylinder at about 600 crank angle before TDC. This injected fuel mixes with the air in the air intake chamber. Thus the air-fuel mixture is obtained. In a suction stroke, the intake valve opens and the fuel-air mixture is sucked into the cylinder.
According to the firing order, the injection of the fuel takes place inside the inlet manifolds of the other cylinders at various timings.
The ECU plays the key role in injection timing it calculates the appropriate injection timing for each cylinder. In order to meet the operating condition, the injection valve is kept open for a longer time by ECU. In the case of accelerating condition, the injection valve will be opened for a longer time to supply additional fuel to the engine.