International Engine Intellectual Property Company, LLC

Michael D Bartkowicz

Luis Carlos Cattani

Paul Gottemoller

John R Zagone

Martin R Zielke

Qianfan Xin

John L Cagney

Bashar Y Melhem

Antoun Y Calash

Steve Gravante

Timothy J Prochnau

Jim Burke

John Zagone

A system and method for controlling the quantity of compressed air that may enter into an engine cylinder during the intake stroke of a piston during an engine braking event. A control throttle may be positioned to restrict the quantity of compressed air that may enter into the cylinder during the intake stroke. The control throttle may also be positioned downstream of the engine and configured to adjustably restrict the quantity of exhaust gas that may be delivered to a turbine. By restricting the exhaust gas delivered to the turbine, the power generated by the turbine that is used by the compressor to compress intake air may also be reduced. Moreover, by controlling the power available to the compressor, the quantity of compressed intake air may be controlled, which allows for control of the quantity of compressed air that enters into the cylinder during the compression stroke.

Engine braking

In response to activation of a compression release brake when a motor vehicle having a turbocharged internal combustion engine is operating at some elevation above sea level and a turbocharger compressor is operating in a region of an operating map which is creating boost air in an engine intake manifold which would cause the compression release brake to decelerate the vehicle more slowly at that elevation than it would at sea level for the same operating conditions of the vehicle and engine other than altitude, the compression release brake decelerates the vehicle less slowly by causing an exhaust gas recirculation system to reduce at least one of a) mass of exhaust diverted to an intake system of the engine and b) cooling of the diverted exhaust.

Turbocharger operation to increase brake effectiveness

An exhaust gas turbocharger housing () for an engine includes a main turbine housing portion () and a throat portion () defining an exhaust gas passageway () that is in upstream fluid communication with the main turbine housing. The exhaust passageway () communicates exhaust gases (EG) to the main turbine housing portion (). A flow divider () generally bisects the exhaust gas passageway () forming a first inlet passageway (A) and a second inlet passageway (B). A flow hole () is disposed through the flow divider () for permitting the fluid communication of exhaust gas (EG) from the first inlet passageway (A) to the second inlet passageway (B).

Exhaust pulse energy divider

A control system for engine braking for a vehicle powered by a turbocharged engine uses a supercharger to assist a turbocharger compressor to boost turbocharger air flow into the engine cylinders. An engine driven air pumping device draws ambient air, or alternately exhaust gas through the pump inlet, compresses the air, and delivers the compressed air through the pump outlet to the turbocharger compressor inlet or alternately the turbocharger compressor outlet. The increased air flow into the cylinders and out of the cylinder exhaust valves increases retarding power of the vehicle.

Supercharged boost-assist engine brake

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Oswego, IL, United States of America

Michael D Bartkowicz