Gm Global Technolgoy Operations, Inc.

Gary L Nye

Rodney E Baker

Robert Lionel Jacques

James B Hicks

Brian W Geiser

Curt R Danielewicz

Manmeet S Pannu

Cynthia Ann Stuvel

An engine assembly may include an engine structure, a first camshaft housing assembly and a first camshaft assembly. The first camshaft housing assembly may be supported by the engine structure and have a first portion providing a first plurality of bearing support surfaces on a first side and a second portion coupled to the first portion and providing a second plurality of bearing support surfaces on a second side opposite the first side. The first camshaft assembly may be rotationally supported by the first camshaft housing assembly and arranged between the first portion and second portion.

Engine assembly with camshaft housing

A mechanical vacuum pump for an engine includes a flange configured for attachment to a cylinder head of the engine. The flange defines a bore, which is configured for interconnecting an injection air inlet in the cylinder head with an injection air outlet of a secondary air injection valve. The secondary air injection valve is directly mounted to the mechanical vacuum pump, thereby indirectly mounting the secondary air injection valve to the cylinder head of the engine, with the bore communicating fresh air from the secondary air injection valve to the cylinder head.

Mechanical vacuum pump integrated with coupled secondary air injection valve

An engine comprises a cylinder head at least partially defining a dry valley and a cover secured to the cylinder head. The cover defines a first aperture. A boss extends from the cylinder head toward the cover. The boss defines a second aperture. A fastener extends through the first aperture and at least partially through the second aperture to secure the cover to the cylinder head. The fastener defines a passage to fluidly connect the dry valley to an exterior of the engine.

Cylinder head dry valley drain

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Macomb, MI, United States of America

Gary L Nye