Robert D Cholvin

US Patent:

45137307, Apr 30, 1985

Filed:

Apr 9, 1984

Appl. No.:

6/598144

Inventors:

Robert L. Cholvin - Santa Monica CA
Charles E. McInerney - Rolling Hills Estates CA
James N. Nancarrow - Torrance CA
Jack L. Gantz - Marina Del Rey CA

Assignee:

The Garrett Corporation - Los Angeles CA

International Classification:

F02D 2302

US Classification:

123564

Abstract:

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.

US Patent:

45151369, May 7, 1985

Filed:

Dec 19, 1983

Appl. No.:

6/562798

Inventors:

Robert L. Cholvin - Santa Monica CA
Charles E. McInerney - Rolling Hills Estates CA
James N. Nancarrow - Torrance CA
Jack L. Gantz - Marina Del Rey CA

Assignee:

The Garrett Corporation - Los Angeles CA

International Classification:

F02D 2302

US Classification:

123564

Abstract:

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.

US Patent:

42839122, Aug 18, 1981

Filed:

Jun 12, 1979

Appl. No.:

6/047843

Inventors:

Robert L. Cholvin - Santa Monica CA

Assignee:

The Garrett Corporation - Los Angeles CA

International Classification:

F02B 3700

US Classification:

60602

Abstract:

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.

US Patent:

44897022, Dec 25, 1984

Filed:

Sep 27, 1982

Appl. No.:

6/424205

Inventors:

Robert L. Cholvin - Santa Monica CA
Charles E. McInerney - Rolling Hills Estates CA
James N. Nancarrow - Torrance CA
Jack L. Gantz - Marina Del Ray CA

Assignee:

The Garrett Corporation - Los Angeles CA

International Classification:

F02D 2300

US Classification:

123564

Abstract:

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.