Gm Global Technolgoy Operations, Inc.

John Byron Davis

Bryan K Pryor

Sean M McGowan

Mark R Claywell

Joel H Pike

Jeremy T Demarest

Jeff Jocsak

Haralabos Triantafyllidis

A gerotor assembly is provided which includes a crankshaft, an inner drive gear, an outer driven gear and a housing defining an oil groove. The inner drive gear defines a plurality of inner gear teeth. The outer driven gear defines a plurality of outer gear teeth operatively configured to engage with the inner gear teeth. The outer drive gear may define a plurality of passageways to form a hydrodynamic film between the outer driven gear and the housing. Alternatively, a high pressure oil pump may feed oil into the oil groove in order to distribute a hydrodynamic film.

Gerotor assembly having an oil groove

An oil pan includes a pan structure forming a primary reservoir, and defining a PCV passage, and a PCV reservoir. The PCV passage includes an inlet for receiving fluid from a PCV drain of an engine block, and an outlet disposed vertically below the inlet of the PCV passage for discharging the fluid received from the PCV drain. The PCV reservoir includes a lower end disposed adjacent the outlet of the PCV passage, and an upper end disposed vertically above the lower end of the PCV reservoir and in fluid communication with the primary reservoir. The PCV passage and the PCV reservoir define a fluid flow path forming a fluid trap at the intersection of the outlet of the PCV passage and the lower end of the PCV reservoir, to keep the outlet of the PCV passage submerged during dynamic operation of the engine.

Oil pan with dedicated drain for positive crankcase ventilation

A fluid pump includes a housing defining a cavity. An end plate is disposed within the cavity and divides the cavity into a gear section and an end section. A gear set is disposed within the gear section and comprises at least one gear rotatable about an axis. The end plate is movable longitudinally along the axis for compressing the gear set. A channel is in fluidic communication with the end section for supplying a fluid to the end section to force the plate toward the gear set.

Lubricating fluid system for a vehicle with self compensation plate

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Hartland, MI, United States of America

John Byron Davis