초록 ▼

A fuel pressure regulator is provided between the outlet of the fuel pump and an inlet of a jet pump to control the flow of fuel to the jet pump. Desirably, during low voltage conditions in a vehicle, the flow of fuel to the jet pump may be temporarily restricted or terminated to decrease the amount

A fuel pressure regulator is provided between the outlet of the fuel pump and an inlet of a jet pump to control the flow of fuel to the jet pump. Desirably, during low voltage conditions in a vehicle, the flow of fuel to the jet pump may be temporarily restricted or terminated to decrease the amount of fuel diverted from the engine and thereby increase the flow rate of fuel to the engine and improve the performance of the engine. The regulator may also function to bypass fuel delivered from the fuel pump in excess of the engine fuel demand to control the pressure of and limit the maximum pressure of fuel supplied to the engine.

대표청구항 ▼

1. A fuel pressure regulator, comprising:a housing having an inlet constructed to communicate with an outlet of a fuel pump and an outlet constructed to communicate with a jet pump; a valve carried by the housing and having a valve head engageable with a valve seat carried by the housing to prevent

1. A fuel pressure regulator, comprising:a housing having an inlet constructed to communicate with an outlet of a fuel pump and an outlet constructed to communicate with a jet pump; a valve carried by the housing and having a valve head engageable with a valve seat carried by the housing to prevent fluid flow through the outlet when the pressure of fuel at the inlet is below a predetermined threshold pressure and displaceable from the valve seat when the pressure at the inlet is above said predetermined threshold pressure to permit fluid flow from the inlet through the outlet to power the jet pump; a diaphragm yieldably biased against the pressure of fuel at the inlet and which positions the valve head on the valve seat when the pressure of fuel at the inlet is below the threshold pressure and is displaceable by fuel at the inlet above the threshold pressure to permit the valve head to move away from the valve seat and fuel to flow through the outlet; and a bypass outlet of the housing, an opening through the diaphragm in communication with the bypass outlet and a second valve seat surrounding the opening through the diaphragm and constructed to be selectively engaged by the valve head to selectively communicate the inlet with the bypass outlet when the fuel pressure at the inlet is above a second threshold pressure.