When the gas pressure in the intake manifold decreases (the vacuum degree increases), the diaphragm moves up, the opening of the oil return valve increases, the oil return volume increases, the oil pressure in the fuel distribution pipe decreases, and the changed intake manifold is maintained. Constant pressure difference (0.25MPa).
When the gas pressure in the intake manifold increases (the degree of vacuum decreases), the diaphragm moves down, the opening of the oil return valve decreases, the oil return volume decreases, and the oil pressure in the fuel distribution pipe increases, maintaining and changing the intake The constant (0.25MPa) of the air manifold pressure difference.
The output characteristics of the oil pressure regulator reflect the relationship between the oil pressure in the fuel distribution pipe and the intake manifold pressure. The function of the oil pressure regulator is to ensure that the fuel injection volume of the injector is not affected by the negative pressure of the intake manifold and the oil in the fuel supply system. The influence of pressure is only determined by the opening time of the injector valve.