Douglas J Trombley from 28953 James Dr, Warren, MI 48092, age 71, Phone: (586)5784872

Us Patents

Method And Means For Determining Air Mass In A Crankcase Scavenged Two-Stroke Engine
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US Patent:

49207890, May 1, 1990
Filed:

Sep 19, 1989
Appl. No.:

7/409377
Inventors:

Aparicio J. Gomez - Birmingham MI
Douglas E. Trombley - Warren MI
Kenneth J. Buslepp - Utica MI
Assignee:

General Motors Corporation - Detroit MI
International Classification:

G01M 1500
US Classification:

731182
Abstract:

A method and means are described for determining the mass of air available for combustion within a cylinder of a crankcase scavenged two-cycle engine, without the use of a mass-air flow sensor. This is achieved by estimating the mass of air under compression within a crankcase chamber, prior to its transfer to a cylinder combustion chamber during the engine operating cycle. The estimate for air mass is based upon the polytropic behavior of a portion of the crankcase compression process, and the pressure, volume and temperature of the air at two predetermined engine rotational positions during the polytropic phase of compression. The volume of the air within the crankcase chamber is determined as a function of engine rotational angle, with crankcase air temperature being derived as a function of intake air temperature. Air pressure during the polytropic phase of compression is sensed with a pressure sensor disposed within the crankcase chamber. The estimate for air mass is corrected to account for air leakage and imperfect transference of the air between the crankcase and combustion chambers.

Fuel Injection Timing Control For A Crankcase Scavenged Two-Stroke Engine
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US Patent:

49586092, Sep 25, 1990
Filed:

Dec 18, 1989
Appl. No.:

7/451834
Inventors:

Douglas E. Trombley - Warren MI
Kenneth J. Buslepp - Utica MI
Cathy C. Lillie - Mt. Clemens MI
Marcel R. Wancket - Mt. Clemens MI
Assignee:

General Motors Corporation - Detroit MI
International Classification:

F02D 4104
F02M 5100
US Classification:

123478
Abstract:

A method and apparatus for improving the output torque response of a crankase scavenged, two-stroke engine to a change in throttle position by adjusting the conventional timing of cylinder fuel injection as a function of the position of the throttle and the time rate of change in the throttle position. Preferably, throttle position is measured with a potentiometer connected to the engine air intake throttle, and then filtered with a filter having a first order lag characteristic. Injection timing is advanced based upon a first predetermined schedule as a function of the measured throttle position. The difference between the measured and filtered throttle positions represents an indication of the time rate of change of throttle position and is employed to advance or retard timing in accordance with the second predetermined schedule, depending upon whether the difference is positive or negative, respectively. As a result, a substantially linear relationship is established between the output torque of the engine and the position of the throttle over its entire range of movement, and the amount of time required for the engine to respond to abrupt changes in throttle is reduced.

Internal Combustion Engine Air/Fuel Ratio Compensation
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US Patent:

52898121, Mar 1, 1994
Filed:

Jun 1, 1993
Appl. No.:

8/069464
Inventors:

Douglas E. Trombley - Grosse Pointe MI
Kenneth J. Buslepp - Shelby Township, Macomb County MI
William C. Albertson - Sterling Height MI
Assignee:

General Motors Corporation - Detroit MI
International Classification:

F02M 6702
US Classification:

123533
Abstract:

Engine inlet air/fuel ratio compensation is applied to an internal combustion engine having pneumatic fuel injection, wherein the difference between a value proportional to inlet air pressure and a value proportional to inlet fuel pressure is monitored and a commanded fuel or air quantity adjusted as a predetermined function of the difference.

Idle Control System For A Crankcase Scavenged Two-Stroke Engine
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US Patent:

49553410, Sep 11, 1990
Filed:

Sep 18, 1989
Appl. No.:

7/408868
Inventors:

Douglas E. Trombley - Warren MI
Kenneth J. Buslepp - Utica MI
Assignee:

General Motors Corporation - Detroit MI
International Classification:

F02M 300
F02B 3304
US Classification:

123339
Abstract:

A method and apparatus for controlling the idling rotational speed of a direct fuel injected, crankcase scavenged, two-stroke engine are disclosed. This is accomplished by regulating the timing of engine fuel injection within the rotational cycle of the engine. If the engine idling speed is outside a predetermined range of speeds, containing a target idling speed, the timing of fuel injection is advanced within the rotational cycle of the engine to increse idling speed, or retarded to decrease idling speed. The value by which fuel injection timing is advanced or retarded is determined by the difference between the actual idling speed and the target idling speed. The target idling speed is made a function of engine operation temperature to assure that a cold engine will idle properly when first started. After fuel injection timing is changed, a predetermined period of time is waited before repeating the idle control steps, to allow engine speed to stabilize. The method also provides for advancing fuel injection timing by a relatively large amount in the event that the idling speed falls below a predetermined stalling speed.

Output Torque Matching In A Multi-Speed Electric Vehicle
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US Patent:

56295936, May 13, 1997
Filed:

Dec 14, 1995
Appl. No.:

8/574568
Inventors:

Frederick J. Pollock - Royal Oak MI
Douglas E. Trombley - Grosse Pointe Woods MI
Assignee:

General Motors Corporation - Detroit MI
International Classification:

B60K 2300
H02P 736
US Classification:

318432
Abstract:

In an electrically driven vehicle having an automatic transmission for coupling motor output torque to at least one drivewheel through a selected one of at least a pair of speed ratios, a method of matching the post-shift output torque to the preshift output torque is disclosed whereby undesirable post-shift driveline disturbances such as driveline sag are eliminated and post-shift vehicle performance is not compromised due to changes in output torque.

Engine Idle Speed Control Based Upon Fuel Mass Flow Rate Adjustment
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US Patent:

51633981, Nov 17, 1992
Filed:

Dec 16, 1991
Appl. No.:

7/807352
Inventors:

Kenneth J. Buslepp - Shelby Township, Macomb County MI
Douglas E. Trombley - Grosse Pointe MI
Ronald J. Sikarskie - Warren MI
Assignee:

General Motors Corporation - Detroit MI
International Classification:

F02D 4116
US Classification:

123339
Abstract:

An idle speed regulating system is described for an internal combustion engine operating according to a fuel based control strategy, wherein the amount of fuel delivered the engine is determined directly as a function of the demand for engine output power and the amount of air supplied to the engine is controlled as a function of the quantity of delivered fuel. The system senses the actual idling rotational speed of the engine, derives a desired idling speed for the engine, and reduces the difference between the desired and actual idling speeds by adjusting the flow rate of the quantity of fuel delivered to the engine as a function of the difference between the desired and actual idling speeds. More specifically, the rate of fuel flow is adjusted in accordance with the sum of an open-loop feedforward value, a closed-loop feedback value, and preferably an adaptive learning correction value.

Method And Means For Determining Exhaust Backpressure In A Crankcase Scavenged Two-Stoke Engine
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US Patent:

50519093, Sep 24, 1991
Filed:

Sep 15, 1989
Appl. No.:

7/407984
Inventors:

Aparicio J. Gomez - Birmingham MI
Douglas E. Trombley - Warren MI
Dennis W. Montville - Utica MI
Assignee:

General Motors Corporation - Detroit MI
International Classification:

F02M 4900
US Classification:

36443105
Abstract:

A method and means are described for determining the average backpressure at a cylinder exhaust port in a crankcase scavenged two-cycle engine. The exhaust backpressure is determined by averaging the pressure of air within a crankcase chamber associated with the cylinder, during a portion of the engine operating cycle when the cylinder inlet and exhaust ports are simultaneously open. The overlap interval in port openings creates a channel for airflow between the crankcase chamber and the cylinder exhaust port, and except for an initial portion of the interval assocated with the pressure equalization between the cylinder and its crankcase chamber, the crankcase pressure substantially equals the backpressure appearing at the cylinder exhaust port. In the preferred embodiment of the invention, a pressure sensor is disposed within the crankcase chamber to sample air pressure at specified engine rotational positions during the overlap interval. These samples are then numerically averaged to obtain the average exhaust backpressure, which is used for compensating the amount of air inducted per cylinder per engine cycle to determined the amount of air per cylinder trapped and available for combustion within the engine.

Adaptive Engine Control Responsive To Catalyst Deterioration Estimation
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US Patent:

58571639, Jan 5, 1999
Filed:

Dec 12, 1995
Appl. No.:

8/570883
Inventors:

Douglas Edward Trombley - Grosse Pointe Woods MI
Kenneth James Buslepp - Brighton MI
Aidan Michael Miller - Howell MI
Assignee:

General Motors Corporation - Detroit MI
International Classification:

G06G 770
US Classification:

701101
Abstract:

Control of operation of an internal combustion engine is responsive to an estimate of catalyst deterioration in an engine exhaust gas catalytic treatment device, including ignition timing control, intake air control, and supplemental catalyst heating control. The deterioration estimate is responsive to a catalyst temperature estimate which may be corrected in accord with the estimated deterioration.