Gm Global Technolgoy Operations, Inc.

James O Wilson

Jeffrey Allan Rock

William Henry Pettit

Ronald Jay Pierik

Donald D Stoltman

Kenneth John Dauer

Roman J Press

A valve for an automotive vehicle emission system is provided which includes a valve housing with an inlet communicating the valve housing with an air pump; an outlet fluidly communicating the valve with a catalytic converter, the outlet having a check valve preventing flow from an engine exhaust conduit through the valve to the air pump; an upper diaphragm in the valve housing creating a first chamber in the housing which is fluidly exposed to the inlet; a lower diaphragm in the housing creating a second chamber between itself and the first diaphragm, the lower diaphragm forming a third chamber between itself and the housing generally opposite the first chamber; a sealing wall located within the housing separating the second chamber from the inlet, the sealing wall having a surface forming a valve seat with the lower diaphragm, dividing the inlet from the second chamber; a spring urging the lower diaphragm toward the first chamber; and a valve stem connecting the upper and lower diaphragms wherein the air pressure within the lower chamber causes a generally equal force on the upper diaphragm to move in a first direction as it causes on the lower diaphragm to move in a second direction opposite from the first direction, moving the lower diaphragm away from the sealing wall.

Vehicle emission air injection

A fuel injector has a flat armature/valve controlling fuel flow through an opening in a valve seat. The valve seat comprises a raised annular land with a cylindrical opening extending therethrough to define a substantially cylindrical outlet for the passage of fuel having a substantial flow area.

High volume gaseous fuel injector

An engine timing drive for driving a camshaft and an accessory such as a balance shaft has a transmission member including a fixed phase output for driving the accessory and a variable phase output for driving the camshaft. A preferred embodiment incorporates a planetary cam phaser in a driven sprocket that also carries a fixed phase output gear as an accessory drive.

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Perry, NY, United States of America

James O Wilson