Hamid M Esfahan

US Patent:

7769536, Aug 3, 2010

Filed:

Feb 24, 2009

Appl. No.:

12/391479

Inventors:

Wajdi B. Hamama - Whitmore Lake MI, US
Craig M. Sawdon - Williamston MI, US
Robert J. Horner - Dexter MI, US
Eric Ferch - Northville MI, US
Hamid M. Esfahan - Ann Arbor MI, US

International Classification:

F02P 5/15

US Classification:

701111, 12340638

Abstract:

An engine control system includes a digital signal processing (DSP) module that generates a fast Fourier transform (FFT) of an engine knock signal generated by an engine knock sensor. An intensity determination module determines an engine knock intensity based on one of a maximum of and an average of the FFT. A status determination module determines a status of the engine knock sensor based on the engine knock intensity, a plurality of predetermined knock intensity thresholds, and a rotational speed of an engine crankshaft.

US Patent:

7826963, Nov 2, 2010

Filed:

Apr 28, 2009

Appl. No.:

12/431153

Inventors:

Wenbo Wang - Novi MI, US
Mark D. Carr - Fenton MI, US
Michael J. Lucido - Northville MI, US
Jon C. Miller - Fenton MI, US
John F. Van Gilder - Webberville MI, US
Daniel P. Grenn - Highland MI, US
Hamid M. Esfahan - Ann Arbor MI, US
Ian J. Mac Ewen - White Lake MI, US

International Classification:

F02M 51/00

US Classification:

701114, 123479, 123490, 123690, 7311441, 7311445

Abstract:

An engine control system includes a driver module and a diagnostics module. The driver module includes a high-side driver and a low-side driver, which selectively actuate a load. The driver module generates status signals based on detection of each of a plurality of failure modes of the high-side and low-side drivers. The diagnostics module increments a first error count for a first mode of the plurality of failure modes when the status signals indicate the driver module has detected the first mode. The diagnostics module increments a corresponding total count each time the driver module analyzes the first mode. The diagnostics module sets a fail state for a diagnostic trouble code (DTC) when the first error count for the first mode reaches a first predetermined threshold prior to the total count reaching a second predetermined threshold.

US Patent:

20080229806, Sep 25, 2008

Filed:

Sep 11, 2007

Appl. No.:

11/853124

Inventors:

Anthony E. Cubr - Fenton MI, US
Craig M. Sawdon - Williamston MI, US
Wajdi B. Hamama - Whitmore Lake MI, US
Karl T. Kiebel - Royal Oak MI, US
Robert J. Horner - Dexter MI, US
Marilyn L. Kindermann - Milford MI, US
Jian Lin - Beverly Hills MI, US
Trenton W. Haines - Novi MI, US
Eric Ferch - Northville MI, US
Hamid M. Esfahan - Ann Arbor MI, US
James T. Kurnik - Linden MI, US
Weixin Yan - Novi MI, US

International Classification:

G01L 23/22

US Classification:

73 3503, 702 56

Abstract:

A knock detection module for an engine comprises a statistics storage module and a processing module. The statistics storage module stores M times N vibration profiles corresponding to M zones of operation of the engine and N cylinders of the engine, wherein M and N are integers greater than one. The processing module determines in which one of the M zones the engine is operating and determines whether knock has occurred for one of the N cylinders by comparing measured vibration data with a selected one of the vibration profiles corresponding to the one of the M zones and the one of the N cylinders.

US Patent:

20090276147, Nov 5, 2009

Filed:

Nov 12, 2008

Appl. No.:

12/269346

Inventors:

Wajdi B. Hamama - Whitmore Lake MI, US
Craig M. Sawdon - Williamston MI, US
Eric Ferch - Northville MI, US
Hamid M. Esfahan - Ann Arbor MI, US
John F. Van Gilder - Webberville MI, US
Brian D. Francis - Fenton MI, US
Anthony E. Cubr - Fenton MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS, INC. - Detroit MI

International Classification:

F02D 45/00

US Classification:

701111

Abstract:

A knock diagnostic module having a knock module that increments a sample count when a cylinder firing signal corresponding to a first cylinder is received and selectively increments a knock count based on a knock detection signal that corresponds to the cylinder firing signal of the first cylinder A knock analysis module analyzes the knock count of the first cylinder when the sample count of the first cylinder reaches a predetermined value and selectively generates an excessive knock signal when the knock count exceeds a predetermined threshold. A remedial action module selectively performs a remedial action based on the excessive knock signal.

US Patent:

20100192122, Jul 29, 2010

Filed:

Sep 8, 2009

Appl. No.:

12/555338

Inventors:

Hamid M. Esfahan - Ann Arbor MI, US
Satish Kumar - East Lyme CT, US
Shane M. Boehner - Fenton MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS, INC. - DETROIT MI

International Classification:

G06F 9/45
G05B 19/042

US Classification:

717105, 700 86, 717108, 717140, 717104

Abstract:

An on-target rapid control prototyping (RCP) system includes a host control module that generates a first RCP model based on selected function blocks in a block library. A target language compiler converts the first RCP model into source code. A cross-compiler coverts the source code into object code. A download module performs an on-target download of the object code from a host that includes the host control module to a production control module of a production system that is separate from the host.

US Patent:

20100274442, Oct 28, 2010

Filed:

Apr 28, 2009

Appl. No.:

12/431134

Inventors:

Wenbo Wang - Novi MI, US
Daniel P. Grenn - Highland MI, US
John F. Van Gilder - Webberville MI, US
Michael J. Lucido - Northville MI, US
Ian J. Mac Ewen - White Lake MI, US
Hamid M. Esfahan - Ann Arbor MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS, INC. - Detroit MI

International Classification:

G06F 7/00

US Classification:

701 34

Abstract:

A method and control module for determining a sensor error includes a time-based diagnostic module generating a time-based diagnostic for a sensor and an event-based diagnostic module generating an event-based diagnostic for the sensor. A synchronizing module synchronizes the time-based diagnostic and the event-based diagnostic to obtain a diagnostic result. A fault indicator module generates a fault signal in response to the diagnostic result.

US Patent:

20110288840, Nov 24, 2011

Filed:

Aug 23, 2010

Appl. No.:

12/861176

Inventors:

Michael A. Kropinski - Troy MI, US
Minghui Kao - Rochester Hills MI, US
Gary Ferries - Rochester Hills MI, US
Hamid M. Esfahan - Ann Arbor MI, US
Wen-Chuan Lin - Novi MI, US
Michael A. Steele - Southfield MI, US
Onassis Matthews - Novi MI, US

Assignee:

GM GLOBAL TECHNOLOGY OPERATIONS, INC. - Detroit MI

International Classification:

G06G 7/48

US Classification:

703 8

Abstract:

A vehicle simulation system includes a compiler module, a parser module, a wrapper module, a modeling module, and a simulation module. The compiler module generates object code that is compatible with a first type of operating system based on source code that is executable by a vehicle control module and that is compatible with a second type of operating system. The parser module generates a definitions file and an extensible markup language (XML) file based on the source code and the object code. The wrapper module generates a library file based on the object code and the definitions file. The modeling module generates model-based source code for a virtual model based on the XML file and a user configuration of the virtual model. The simulation module simulates operation of a plant of a vehicle with the virtual model.