The Garrett Corporation

Robert L Cholvin

Charles E McInerney

James N Nancarrow

Jack L Gantz

A control system is provided for a supercharged diesel engine to control engine air inflow in response to an operator-selected fuel flow and in accordance with a predetermined air-fuel ratio schedule chosen for minimizing undesirable exhaust emissions throughout a broad range of engine operating conditions.

Supercharged diesel engine air inflow control system

A control system is provided for a supercharged diesel engine to control engine air flow in response to an operator-selected fuel flow and in accordance with a predetermined air-fuel ratio schedule chosen for minimizing undesirable exhaust emissions throughout a broad range of engine operating conditions. The control system includes a force-biased relief valve movable between closed and open positions in response to the pressure of air supplied to the engine, wherein the force-bias acting upon the relief valve is altered in response to the operator-selected fuel flow to the engine.

A control system is provided for a supercharged diesel engine to control engine air inflow in response to an operator-selected fuel flow and in accordance with a predetermined air-fuel ratio schedule chosen for minimizing undesirable exhaust emissions throughout a broad range of engine operating conditions. The control system includes a force-biased relief valve for adjusting engine air inflow, wherein the relief valve is movably responsive to the pressure of air supplied to the engine and the force-bias is controlled in accordance with engine fuel flow.

Supercharged diesel engine air flow control system

A pneumatic control for turbochargers includes an evaucated bellows-operated servo valve for controlling the pressure differential across a diaphragm, which in turn controls the position of a turbocharger wastegate valve. Discharge pressure from a turbocharger compressor is applied to both sides of the diaphragm. The bellows-operated servo valve is operable to vent one side of the diaphragm whenever the discharge pressure exceeds a predetermined magnitude resulting in a pressure differential across the diaphragm to control the position of the waste gate valve.

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Santa Monica, CA, United States of America

Robert L Cholvin