Gm Global Technolgoy Operations, Inc.

Michael B Fleck

Thomas A Spix

Kevin M Luchansky

Steven G Bryde

Anil Kumar Sachdev

Tyson W Brown

Karl R Gilgenbach

Kevin W Herrala

Ronald B Beals

Kenneth James Patton

Michael S Ferrand

Michael D Pepperman

A monolithic rocker arm component includes a first lateral wall defining a first aperture and a first mass reducing feature, an opposing second wall defining a second aperture and a second mass reducing feature, a pushrod receiving member that bridges the first lateral wall and the second lateral wall at a first end of the rocker arm, and a tongue element that bridges the first lateral wall and the second lateral wall at a second end of the rocker arm. The pushrod receiving member routes oil from the first towards the second end. The monolithic rocker arm may have one or more internal regions having lattice structures. Methods for additive manufacturing the monolithic rocker component are also provided.

Mass-efficient rocking component

A universal oil pan die tooling is provided for forming alternative oil pans for alternative internal combustion engines with and without an oil cooler circuit. The die tooling includes a first die member defining a cavity and a second die member having a protruding portion designed to be inserted in the cavity of the first die member to define a mold cavity therebetween that defines a shape of the oil pan. A first die insert is used along with the first die member and the second die member to form oil pans for use with an engine having an oil cooler. An alternative second die insert is used in place of the first die insert along with the first die member and the second die member to form oil pans for use with an engine without an oil cooler.

Oil pan casting with optional oil cooler provisions

In one exemplary embodiment of the invention, an assembly for an internal combustion engine includes a crankshaft, a drive mechanism coupled to the crankshaft and an oil pump actuated by the drive mechanism. The engine also includes a vacuum pump actuated by the drive mechanism, wherein the drive mechanism, oil pump and vacuum pump are disposed in an oil pan and a housing disposed between the oil pump and vacuum pump configured to enclose at least a portion the drive mechanism and restrict a flow of oil from the oil pan into the housing to reduce aeration of the oil during operation of the internal combustion engine.

Pump assembly for internal combustion engine

An engine includes an engine block that defines a drain-back passage and a Positive Crankcase Ventilation (PCV) passage. The drain-back passage and the PCV passage are disposed in fluid communication with each other. A cylinder head is attached to the engine block. The cylinder head defines an oil return passage. The oil return passage is disposed in fluid communication with both the drain-back passage and the PCV passage. A head gasket is disposed between the engine block and the cylinder head, and includes a shelf that extends at least partially over the PCV passage to prevent liquids draining through the oil return passage into the drain-back passage, from entering the PCV passage, while allowing gasses flowing through the oil return passage to enter the PCV passage.

Engine having PCV separator inlet shielded by head gasket geometry

A vertically disposed oil pan baffle includes a body having first and second opposing side walls joined by a third wall, and an opposing fourth wall. Each of the first and second side walls is configured to conform with first and second internal surfaces of an oil pan. A metering opening is formed in one of the third and fourth walls. The metering opening is configured and disposed to control a rate of flow of oil through the vertically disposed oil pan baffle.

Vertically disposed oil pan baffle

An engine assembly includes an engine block at least partially defining a combustion chamber and a crankcase volume. The engine block defines an opening in fluid communication with the crankcase volume. An air-oil separator is mounted to the engine block at the opening and is configured to separate oil from blowby gasses flowing from the crankcase volume through the air-oil separator. A method of venting an engine crankcase volume is also included.

Engine assembly with engine block-mounted air-oil separator and method of ventilating an engine crankcase

An internal combustion engine includes a plurality of PCV ports formed internally within the engine block and the cylinder head. The PCV ports directly connect a crankcase chamber with each of a plurality of intake ports defined by the cylinder head. The blow-by gases that accumulate within the crankcase chamber are directly vented through the internal PCV ports into the intake ports.

Growing community of inventors

Royal Oak, MI, United States of America

Michael B Fleck