Patent ID: 7052252
Filing Date: 2006-05-30
Classification: F04C

Abstract:
1. A fuel pump unit for pumping fuel from a fuel tank to a combustion chamber, comprising: a pump body; a shaft driven gear pump in the pump body adapted to pump fuel from an upstream fuel network to a downstream fuel network; a pump cover mounted to the pump body, the pump cover having a front wall and a sidewall spacing the front wall from the pump body; a local reservoir defined between the pump body and the pump cover; a first inlet side port upstream of the gear pump in fluid communication with the local reservoir, the first inlet side port being defined by the sidewall of the pump cover; a second inlet side port upstream of the gear pump in fluid communication with the local reservoir, the second inlet side port being defined by the pump body; a first outlet side port downstream of the gear pump in fluid communication with the downstream fuel network, the first outlet side port being defined by the pump body; a fuel regulating valve with open and closed positions for controlling flow of the fuel to the downstream network; and a second outlet side port downstream of the gear pump in continuous fluid communication with the downstream fuel network when the fuel regulating valve is in the open position and when the fuel regulating valve is in the closed position, the second outlet side port being defined externally by the pump cover.