Christopher Lon Graham

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.

US Patent:

8280612, Oct 2, 2012

Filed:

Aug 5, 2009

Appl. No.:

12/535950

Inventors:

Christopher E. Whitney - Highland MI, US
Michael Livshiz - Ann Arbor MI, US
Christopher R. Graham - Lake Orion MI, US
Rafat F Hattar - Macomb MI, US
Cheryl A. Williams - Howell MI, US

International Classification:

G06F 17/00
G06F 17/18

US Classification:

701103, 123299

Abstract:

A coordinated torque control (CTC) system is provided that includes an engine capacity module, a multi-pulse enable module, and a catalyst light off torque reserve module. The engine capacity module determines a torque capacity of an engine and generates a maximum engine torque capacity signal. The multi-pulse enable module enables a multi-pulse mode that includes the injection of at least two pulses of fuel into a cylinder of the engine during a combustion cycle. The multi-pulse enable module generates a multi-pulse desired signal to operate in the multi-pulse mode based on the maximum engine torque capacity signal, a catalyst light off signal, and a brake torque request signal. The catalyst light off torque reserve module generates a torque reserve corrected signal based on the multi-pulse desired signal.