Gm Global Technolgoy Operations, Inc.

David W Beiswenger

Gordon R Paddock

Andrew J Makusij

David R Kessler

Ernst L Ranft

An electronic injector drive module mounted on a fuel injection assembly is cooled by fuel flow through the assembly.

Fuel injection apparatus

In a system for delivering secondary air from an air pump to either the exhaust manifold, preferably, closely adjacent to the exhaust ports, or to a converter in the exhaust system of an internal combustion engine, an integral air switching diverter valve assembly having an inlet connected to the air pump, a primary discharge outlet for delivery of air to the exhaust manifold and a secondary discharge outlet for delivery of air to the converter, a valve being mounted in the assembly for movement between a first or converter mode position at which it is normally positioned to allow secondary air flow to the converter while blocking secondary air flow to the exhaust manifold and a second or port mode position to allow secondary air flow to the exhaust manifold while blocking air flow to the converter, the assembly including a differential pressure operated switching diaphragm assembly used to effect movement of the valve between the port and converter modes, a divert timing assembly operative during deceleration to effect switching to the converter mode, and a pressure relief outlet which is operative during the port or converter switching modes to discharge, at a selected pressure, excess secondary air to the atmosphere.

Integral air switching diverter valve

In a system for delivering air from an air pump to an exhaust system and accessories for an internal combustion engine, an air flow control unit has a high pressure relief valve, an outlet open to the exhaust system, a vent open to the atmosphere and an outlet open to the accessories with a check valve therein. A valve member is movable in response to an engine signal between a first position closing the exhaust system outlet and a second position closing the vent; and a low pressure relief valve is included in the vent to maintain a minimum low pressure in the unit when the valve member is in its first position.

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Brockport, NY, United States of America

David W Beiswenger