The oil pressure regulator is installed at one end of the fuel distribution pipe and has two functions: one is to adjust the fuel pressure of the fuel supply system to keep the difference between the system oil pressure and the intake manifold pressure constant (the set value is generally 300kPa) The second is to buffer the pressure pulsation generated by the fuel pump and the pressure fluctuation caused by the intermittent fuel injection of the injector.
The oil pressure regulator is mainly composed of a spring, a valve body, a valve and an aluminum alloy casing. The valve body is fixed on the metal diaphragm, and a ball valve is installed between the valve body and the valve. The ball valve is held up by shrapnel, and a spring with less elastic force is arranged between the ball valve and the valve body to keep the ball valve and the valve in contact. On the aluminum alloy shell, there are oil pipe joints and vacuum pipe joints. The oil inlet joint is connected with the fuel distribution pipe, the oil return joint is connected with the oil return pipe and communicated with the fuel tank, and the vacuum pipe joint is connected with the throttle valve to the intake manifold. Vacuum tube connection.