OIL PUMP

摘要

A fluid pump system for an engine includes a transmission acting as a first pump and a second pump. In one embodiment, the first pump is a scavenge pump and the second pump is a pressure pump with the transmission being a gear set for altering a drive ratio between a transmission input drive and an input drive of the second pump, thereby allowing additional control of a speed of the second pump in comparison to the engine. The transmission, acting as a scavenge pump, can provide a scavenge pump function to an oil pan of the engine, returning engine oil that is present there from both normal drain back and acceleration/deceleration forces.

主权项

1. A fluid pump for an engine, comprising:
a first shaft for connecting to a drive mechanism for driving the fluid pump; a first housing including a first fluid input port and a first fluid output port; a transmission positioned in an interior of the first housing; the transmission including:
a first driving gear connected to the first shaft to be driven by the first shaft;a first driven gear, the first driving gear engaging the first driven gear to drive the first driven gear, the first driving gear and first driven gear together having a first drive ratio;the transmission also acting as a first fluid pump for pumping fluid from the first fluid input port through the interior of the first housing and out the first fluid output port; a second housing including a second fluid input port and a second fluid output port; a second fluid pump positioned in an interior of the second housing, the pressure stage pump operatively connected to the transmission to be driven by the transmission at the drive ratio for pumping fluid from the second fluid input port through the interior of the second housing and out the second fluid output port.