Solenoid valve SCV control valve 294200-0660 fuel metering valve

The working principle of fuel metering valve

1. When the control coil is not energized, the fuel metering proportional valve is on, which is what we call the normally open solenoid valve, which can provide the maximum flow of fuel to the oil pump. The ECU increases or decreases the oil volume by changing the cross-sectional area of the high pressure oil pump with pulse signal.

2, here we can simply understand the fuel metering unit as an electromagnetic switch, which controls the oil circuit leading to the oil pump. When the switch is not powered on, the amount of oil supplied to the oil pump is the largest, on the contrary, when the solenoid valve is in the zero oil supply position, the supply of the oil pump is led The amount of oil should be zero.

3. Fuel metering unit is a precision component. If the maintenance is not proper or the use of poor quality filter element, it often leads to too much water or impurities in the fuel, which causes the fuel metering valve core to wear or stick, which leads to the engine can not work normally.

          If the fuel metering unit is damaged, the fuel injector injection will be cut off, and the oil inlet metering solenoid valve is completely closed, which can prevent the oil rail pressure from continuing to rise.

        The fuel metering unit is a very precise component, and if you usually use poor quality gasoline filter, it may cause damage to the fuel metering unit. Gasoline filter can filter the moisture and impurities in the gasoline, if the use of inferior gasoline filter, will lead to increased moisture or impurities in the gasoline, which will lead to damage to the fuel metering unit.

       The fuel metering unit is installed in the intake position of the high pressure oil pump. This part can adjust the fuel supply and pressure. This part is controlled by the ecu. If the fuel metering unit is damaged, a fault light will light on the dashboard and the ecu will cut off the fuel injection to the engine. If this failure occurs while driving, a tow truck is required at this time.