Michael A Livshiz

US Patent:

6405587, Jun 18, 2002

Filed:

May 8, 2000

Appl. No.:

09/566879

Inventors:

Michael Livshiz - Ann Arbor MI
Scott J. Chynoweth - Fenton MI
Rodney J. Rhodes - Pinckney MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

G01M 1500

US Classification:

731173

Abstract:

A method of controlling the coastdown of a vehicle is provided. A base engine speed reference is determined. A speed of the vehicle is sensed, and a target engine speed is generated from the base engine speed reference and the speed of the vehicle. An actual engine speed is sensed, and a desired throttle position is determined as a difference between the target engine speed and the actual engine speed. A desired spark advance for the engine is determined as a difference between the target engine speed and actual engine speed.

US Patent:

6704638, Mar 9, 2004

Filed:

Jun 26, 2002

Appl. No.:

10/184260

Inventors:

Michael Livshiz - Ann Arbor MI
Joseph Robert Dulzo - Novi MI
Onassis Matthews - Novi MI
Donovan L. Dibble - Utica MI
Scott Joseph Chynoweth - Fenton MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

G06F 1900

US Classification:

701102, 731173, 701110, 701 84

Abstract:

An engine toque estimator according to the invention includes a vehicle data bus that provides a plurality of engine operating inputs including at least one of engine RPM, spark and a dilution estimate. A steady state torque estimator communicates with the vehicle data bus and generates a steady state engine torque signal. A measurement model communicates with the vehicle data bus and compensates for errors associated with engine-to-engine variation. A dynamic torque estimator communicates with at least one of the vehicle data bus, the measurement model, and the steady state torque estimator and generates an actual torque signal.

US Patent:

6761146, Jul 13, 2004

Filed:

Jun 17, 2003

Appl. No.:

10/463166

Inventors:

Michael Livshiz - Ann Arbor MI
Onassis Matthews - Novi MI
Joseph R. Dulzo - Novi MI
Donovan L. Dibble - Utica MI
Scott J. Chynoweth - Fenton MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F02D 4114

US Classification:

123361, 123399

Abstract:

A torque control system for a vehicle including an internal combustion engine, an electronic throttle coupled to the internal combustion engine, a powertrain controller controlling the electronic throttle, a first control loop operating in the powertrain controller including a feed forward function to control engine torque, a second control loop operating in the powertrain controller including a proportional function acting upon the torque variance in the internal combustion engine, a third control loop operating in the powertrain controller including an integral function acting upon the rpm variance in the internal combustion engine, and where the outputs of the first, second and third control loop are used to factor a desired mass airflow for the engine and the desired mass air flow is used to generate a position command for the electronic throttle.

US Patent:

6840215, Jan 11, 2005

Filed:

Sep 17, 2003

Appl. No.:

10/664172

Inventors:

Michael Livshiz - Ann Arbor MI, US
Scott J. Chynoweth - Fenton MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F02D 3100

US Classification:

123352, 123361

Abstract:

An engine control system and method according to the invention controls torque in an internal combustion engine. Engine parameters are measured and an engine torque is estimated. A desired air per cylinder of the engine is calculated. A desired manifold absolute pressure of a manifold of the engine is calculated based on a function of engine torque. A desired RPM of the engine is calculated based on a measured engine RPM and a reference torque of the engine. A desired area is calculated based on the desired manifold absolute pressure. The desired area is implemented into the controller to control torque output of the engine.

US Patent:

6895946, May 24, 2005

Filed:

Sep 29, 2004

Appl. No.:

10/953954

Inventors:

Michael Livshiz - Ann Arbor MI, US
Scott J. Chynoweth - Fenton MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F02B033/00

US Classification:

1235591, 123434

Abstract:

An engine system includes an engine having an intake manifold and a supercharger that supplies compressed air to the intake manifold. An engine control module calculates a desired pre-supercharged pressure of air into the supercharger and calculates a desired manifold air flow into the engine. The engine control module determines a desired throttle area based on the desired pre-supercharged pressure and the desired manifold air flow and generates control signals to control the engine based on the desired throttle area.

US Patent:

6947824, Sep 20, 2005

Filed:

Jun 22, 2004

Appl. No.:

10/874089

Inventors:

Michael Livshiz - Ann Arbor MI, US
Scott J. Chynoweth - Fenton MI, US
Todd R. Shupe - Milford MI, US
Michael A. Kropinski - Troy MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F02D041/16
G06F019/00

US Classification:

701103, 701110, 123352, 123361

Abstract:

Internal combustion engine control is generally in accordance with RPM and torque modes. Transition from RPM to torque control is accomplished by employing a mass airflow term accounting for any nonequivalence between RPM mode and torque mode mass airflows corresponding respectively to an RPM mode mass airflow and a closed-throttle mass airflow contribution to a total torque mode mass airflow.

US Patent:

6966287, Nov 22, 2005

Filed:

Dec 1, 2004

Appl. No.:

11/001709

Inventors:

Michael Livshiz - Ann Arbor MI, US
Jeffrey M. Kaiser - Highland MI, US
Richard H. Clutz - Howell MI, US
Donovan L. Dibble - Utica MI, US
Bahram Younessi - Farmington MI, US
Gregory J. York - Fenton MI, US
Kevin J. Storch - Brighton MI, US
Timothy J. Braman - Williamston MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F01L001/34

US Classification:

123 9015, 123 9017, 123399

Abstract:

A torque control system for regulating operation of a displacement on demand engine that is operable in an activated mode and a deactivated mode includes a throttle that regulates air flow into the engine and a cam phaser that regulates a torque output of the engine. A first module determines a throttle area based on a desired deactivated manifold absolute pressure (MAP) and a desired mass air flow (MAF) and a second module determines a desired cam phaser position based on an engine speed and a transitional air per cylinder (APC) that is determined based on one of a desired deactivated APC and desired activated APC. A third module generates a throttle control signal to control the throttle based on the throttle area and a fourth module generates a cam phaser control signal to control the cam phaser based on the desired cam phaser position.

US Patent:

6968824, Nov 29, 2005

Filed:

Jun 15, 2004

Appl. No.:

10/868192

Inventors:

Gregory P. Matthews - West Bloomfield MI, US
Michael Livshiz - Ann Arbor MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F02D009/08

US Classification:

123350, 123399, 731182

Abstract:

A torque control system for an engine includes a throttle plate having an adjustable throttle position to regulate a first mass air flow into the engine. A control module estimates a previous volumetric efficiency of the engine based on a previous manifold absolute pressure (MAP) and determines a current MAP based on the previous volumetric efficiency. The control module calculates a difference between the current MAP and the previous MAP and sets a desired MAP equal to the present MAP when the difference is less than a threshold difference. The control module commands the throttle position based on the desired MAP.