Gm Global Technolgoy Operations, Inc.

Jennifer L Liedtke

Thomas E Wenzel

Alan William Hayman

Ko-Jen Wu

Clyde A Bulloch

Andreas M Lippert

William R Matthes

David L Reuss

Mark Alan Mitchell

Alexandros C Alkidas

Gerald A Silvas

Gerald J Schimelfening

An engine assembly may include an engine block, a fuel pump, and a drive shaft. The engine block may include first and second banks defining first and second sets of cylinders disposed at an angle relative to one another to form a V-configuration. The engine block may include a valley between the first and second banks of cylinders. The fuel pump may be supported by the engine block and located within the valley. The drive shaft may be supported by the engine block and may be drivingly engaged with the fuel pump.

Fuel pump shaft and pump mounting in engine block

An integrated hydraulic valve actuator for use in a camless internal combustion engine. The valve actuator includes a separate bolt-on housing defining a through opening receiving a cylindrical liner. The liner internally defines an internal cylinder providing a riding surface, which coaxially surrounds an outer surface of a tubular boost piston. The boost piston defines an inner cylinder, which provides a riding surface for a drive piston fitted within the inner cylinder of the boost piston. The pistons are axially reciprocable within the liner cylinder. A piston position sensor extends radially into the housing and engages a cam on the drive piston to relay the position of the drive piston to a controller. The actuator is preassembled and the housing is attached to an engine cylinder head or cylinder head supply manifold to operate an associated exhaust or intake valve.

Hydraulic engine valve actuator

A manifold for housing high-pressure oil on a camless engine includes an extruded aluminum body having first and second ends. First, second and third extruded channels are formed in the body and each extends from the first end to the second end of the body. The manifold has a plurality of switching valve mounting bores configured to receive a plurality of switching valves operative to alternately communicate the channels with intake and exhaust valves of an engine to which the manifold is mounted to affect movement of the valves.

Manifold for housing high-pressure oil in a camless engine

A combustion chamber for a swirl flow two valve spark ignition direct injection engine includes a cylinder with a closed end having a wedge shaped combustion chamber recess. A fuel injector extends through the closed end near a shallow side of the wedge recess. A spark plug extends through the closed end at a deeper part of the wedge recess opposite from the injector. A single pair of laterally spaced intake and exhaust valves control intake and exhaust ports opening into the wedge recess. A piston in the cylinder has an outer diameter and includes a head end having a raised pedestal with a shallow upwardly angled face ending at a raised ridge and enclosing a shallow bowl in the head end. The bowl is generally oval with a major dimension generally aligned with a cylinder centerline through the valves.

Combustion chamber for swirl flow two valve spark ignition direct injection engine

An engine includes air-assisted fuel injection including fuel injectors supplying fuel through cylinder head-mounted air injectors. An internal air passage in the cylinder head connects with internal air pockets receiving the injectors and supplying them with air. Seals on the air injectors prevent air leakage from the air pockets. The air temperature in the head is affected by an adjacent coolant passage.

Growing community of inventors

Rochester, MI, United States of America

Jennifer L Liedtke