Christopher L Graham

US Patent:

7159623, Jan 9, 2007

Filed:

Sep 22, 2005

Appl. No.:

11/232704

Inventors:

Mark D. Carr - Fenton MI, US
Joseph R. Dulzo - Novi MI, US
Christopher R. Graham - Lake Orion MI, US
Richard B. Jess - Haslett MI, US
Ian J. MacEwen - White Lake MI, US
Onassis Matthews - Novi MI, US
Jeffrey A. Sell - West Bloomfield MI, US
Michael J. Svestka - Waterford MI, US
Julian R. Verdejo - Brighton MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B65B 1/04

US Classification:

141 94, 141198, 141192, 123516

Abstract:

A method of estimating composition of fuel in the fuel tank of a vehicle. A refuel event is detected. Fuel consumption is monitored during a plurality of stages after the refuel event. A plurality of fuel trim shift values are determined relative to the stages. The fuel trim shift values are used to estimate a fuel composition change. This method eliminates a need for a hardware fuel composition sensor and also provides dynamic filtering of fuel trim values.

US Patent:

7258101, Aug 21, 2007

Filed:

Mar 22, 2006

Appl. No.:

11/386301

Inventors:

Mike M. McDonald - Macomb MI, US
William C. Albertson - Clinton Township MI, US
Christopher R. Graham - Lake Orion MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

F02D 41/12
F02D 33/02

US Classification:

123325, 123336, 123402, 123405, 123442

Abstract:

An excess oxygen reduction system includes a fuel cut-off condition module, an injector module, and a valve module. The fuel cut-off condition module determines whether a fuel cut-off condition exists. The injector module prevents a fuel injector from fueling a cylinder when said fuel cut-off condition exists. The valve module closes an impulse charging valve when said fuel cut-off condition exists.

US Patent:

7467511, Dec 23, 2008

Filed:

May 20, 2005

Appl. No.:

11/134234

Inventors:

David P. Sczomak - Troy MI, US
David B. Brown - Brighton MI, US
Stephen K. Fulcher - Clovis NM, US
Jesse M. Gwidt - Brighton MI, US
Michael J. Lucido - Northville MI, US
Christopher R. Graham - Lake Orion MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

F01N 3/00

US Classification:

60277

Abstract:

An engine control system that regulates fuel to an engine after lean idle operation includes a first module that determines a rich mass fuel rate based on a lean operation mass air flow and a stoichiometric air to fuel ratio (AFR) and that calculates a time rich based on the rich mass fuel rate. A second module regulates fuel to the engine during a rich operation period after the lean idle operation to provide the rich mass fuel rate for the time rich.

US Patent:

7771311, Aug 10, 2010

Filed:

Mar 27, 2008

Appl. No.:

12/056486

Inventors:

Christopher R. Graham - Lake Orion MI, US
David N. Belton - Birmingham MI, US

International Classification:

F16H 59/00

US Classification:

477 98

Abstract:

A method comprises operating an engine of a vehicle to provide output torque to an input of a torque converter, determining whether the engine is in a cold start condition, fixing an input shaft of a transmission when the engine is in the cold start condition, and coupling the input shaft of the transmission to an output of the torque converter. A control module comprises a combustion control module that operates an engine of a vehicle to provide output torque to an input of a torque converter, a NPD module that determines whether the engine is in a cold start condition, and a transmission control module that fixes an input shaft of a transmission when the engine is in the cold start condition, wherein the input shaft of the transmission is in communication with an output of the torque converter.

US Patent:

7878175, Feb 1, 2011

Filed:

Jun 10, 2009

Appl. No.:

12/481913

Inventors:

Michael Livshiz - Ann Arbor MI, US
Jeffrey M. Kaiser - Highland MI, US
Christopher R. Graham - Lake Orion MI, US
Christopher E. Whitney - Highland MI, US
Robert Francis Semrau - Ovid MI, US
Brian D. Francis - Fenton MI, US

International Classification:

F02P 5/00
F02P 1/00

US Classification:

12340623, 12340649, 12340655

Abstract:

A coordinated torque control system includes a catalyst module that generates a multi-mode enable signal based on a catalyst light off enable signal. A torque reserve module generates a torque reserve signal based on the multi-mode enable signal, an engine speed signal and an air per cylinder signal. The torque reserve module operates in a multi-pulse mode that is associated with injecting N pulses of fuel into a combustion chamber during a combustion cycle of the engine based on the multi-mode enable signal. N is an integer greater than or equal to 2.

US Patent:

7885756, Feb 8, 2011

Filed:

May 6, 2009

Appl. No.:

12/436362

Inventors:

Michael Livshiz - Ann Arbor MI, US
Jeffrey M. Kaiser - Highland MI, US
Christopher R. Graham - Lake Orion MI, US
Christopher E. Whitney - Highland MI, US
Robert Francis Semrau - Ovid MI, US
Brian D Francis - Fenton MI, US

International Classification:

B60T 7/12
F02B 3/00

US Classification:

701105, 123299, 123305, 12340623, 12340649

Abstract:

A control system is provided and includes a catalyst module that generates a multi-mode enable signal based on a catalyst light off enable signal. A transition control module controls transitions between a single pulse mode and multi-pulse mode based on the multi-mode enable signal. The transition control module receives a first torque signal and generates a second torque signal based on the first torque signal. The engine torque control module generates an air per cylinder signal, a throttle area signal, and a spark timing signal based on the second torque signal. The single pulse mode is associated with a single fuel injection pulse per combustion cycle. The multi-pulse mode is associated with multiple fuel injection pulses per combustion cycle.

US Patent:

8091531, Jan 10, 2012

Filed:

Jul 27, 2009

Appl. No.:

12/509653

Inventors:

Michael J. Lucido - Northville MI, US
Wenbo Wang - Novi MI, US
Christopher R. Graham - Lake Orion MI, US

International Classification:

F02M 57/02
G01M 15/00

US Classification:

123446, 123198 D, 7311443, 701114

Abstract:

A diagnostic system for a pressure sensor includes a fuel pump module and a diagnostic control module. The fuel pump module activates a first pump and deactivates a second pump when an engine is operating in a diagnostic mode. The first pump supplies fuel to the second pump and the second pump supplies fuel to fuel injectors of the engine via a fuel rail. The diagnostic control module receives a measured pressure signal from a pressure sensor that indicates a pressure of the fuel rail during the diagnostic mode. The diagnostic control module detects a fault of the pressure sensor based on a comparison between the measured pressure signal and the commanded pressure signal for the first pump.

US Patent:

8091532, Jan 10, 2012

Filed:

Jul 27, 2009

Appl. No.:

12/509686

Inventors:

Wenbo Wang - Novi MI, US
Michael J. Lucido - Northville MI, US
Christopher R. Graham - Lake Orion MI, US

International Classification:

F02M 55/02
G01M 15/00

US Classification:

123446, 123458, 7311443

Abstract:

A diagnostic system includes a fuel pump module and a diagnostic control module. The fuel pump module activates a first pump when an engine is operating in a diagnostic mode. The first pump supplies fuel to fuel injectors of the engine via a fuel rail. The diagnostic control module receives a measured pressure signal from a pressure sensor that indicates a pressure of the fuel rail during the diagnostic mode. The fuel pump module sends at least one of a first and a second commanded fuel pressure signal to the first pump based on a predetermined relief pressure of a pressure relief valve. The diagnostic control module detects a fault of the pressure sensor based on an engine speed and a comparison between the measured pressure signal and at least one of the first commanded fuel pressure signal and a corrected relief pressure of the pressure relief valve.