David F Mathews

US Patent:

7918212, Apr 5, 2011

Filed:

Jun 4, 2009

Appl. No.:

12/478159

Inventors:

Julian R. Verdejo - Farmington MI, US
Michael R. Grimes - Saline MI, US
Nicholas John Kalweit - Novi MI, US
David S. Mathews - Howell MI, US

International Classification:

F02D 41/10

US Classification:

123492, 12340625, 12340646, 1234065, 701110

Abstract:

A method and control system for controlling an engine includes an instantaneous crankshaft acceleration determining module determining an instantaneous crankshaft acceleration. An engine parameter adjustment module adjusts an engine parameter in response to the instantaneous crankshaft acceleration.

US Patent:

8176896, May 15, 2012

Filed:

Jan 22, 2009

Appl. No.:

12/357776

Inventors:

Julian R. Verdejo - Farmington MI, US
Nicholas John Kalweit - Novi MI, US
David S. Mathews - Howell MI, US
Michael R. Grimes - Saline MI, US

International Classification:

F02D 41/34
F02P 5/15
F02P 5/00

US Classification:

12340665, 7311404, 12340658

Abstract:

A control module for a vehicle includes a time recording module that stores timestamps that correspond to each of N teeth of a target wheel of the vehicle in memory. N is an integer. A position module generates M angular positions based on the timestamps. M is an integer greater than one. Each of the M angular positions corresponds to a space between adjacent ones of the N teeth. A position estimator determines position of the target wheel based on the M positions.

US Patent:

8489303, Jul 16, 2013

Filed:

May 19, 2010

Appl. No.:

12/783162

Inventors:

Andrew W. Phillips - Rochester MI, US
David S. Mathews - Howell MI, US

International Classification:

B60T 7/12
B60K 28/16

US Classification:

701 90, 701 51, 701 58, 701 84, 701 86, 701 87, 180 65265

Abstract:

A control system includes an engine control module and a transmission control module. The transmission control module communicates with the engine control module via a network. The engine control module generates a mean engine speed signal and a minimum engine speed signal. The engine control module transmits the mean engine speed signal and the minimum engine speed signal to the transmission control module via the network. The transmission control module controls operation of at least one of a torque converter and a transmission based on the mean engine speed signal and the minimum engine speed signal. The torque converter is connected between an engine and the transmission.

US Patent:

8532908, Sep 10, 2013

Filed:

May 31, 2011

Appl. No.:

13/118985

Inventors:

Jeffrey A. Morgan - Macomb MI, US
David S. Mathews - Howell MI, US
Ronald J. Herrin - Troy MI, US
John V. Bowman - Farmington MI, US
Julian R. Verdejo - Farmington MI, US

International Classification:

G06F 19/00
G06F 15/00

US Classification:

701102, 123435

Abstract:

A system for an engine includes first, second, third, and fourth modules. The first module determines an expected response of crankshaft speed due to combustion within a cylinder of the engine. The second module determines a value based on the expected response and a measured response of crankshaft speed due to combustion within the cylinder of the engine. The third module estimates an indicated mean effective pressure (IMEP) for the cylinder of the engine based on the value. The fourth module selectively adjusts an operating parameter of the engine based in the estimated IMEP.

US Patent:

8601862, Dec 10, 2013

Filed:

May 22, 2012

Appl. No.:

13/477627

Inventors:

John V. Bowman - Farmington MI, US
David S. Mathews - Howell MI, US

International Classification:

G01M 15/04

US Classification:

7311405, 7311404

Abstract:

A system according to the principles of the present disclosure includes a threshold determination module and a misfire detection module. The threshold determination module determines at least one of an acceleration threshold and a jerk threshold based on a misfire type. The misfire detection module detects a misfire in a cylinder of an engine when: (i) crankshaft acceleration is less than the acceleration threshold; and/or (ii) crankshaft jerk is less than the jerk threshold. Crankshaft jerk is a derivative of crankshaft acceleration with respect to time.

US Patent:

20120078485, Mar 29, 2012

Filed:

Jan 5, 2011

Appl. No.:

12/984818

Inventors:

Julian R. Verdejo - Farmington MI, US
Nicholas John Kalweit - Novi MI, US
John V. Bowman - Farmington MI, US
David S. Mathews - Howell MI, US
Jeffrey A. Morgan - Macomb MI, US
Tameem K. Assaf - Milford MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

G01M 15/06

US Classification:

701101

Abstract:

A system for a vehicle includes a filtering module and an indicated work module. The filtering module generates engine speeds based on positions of teeth of a toothed wheel that rotates with a crankshaft and based on a crankshaft position signal generated by a crankshaft position sensor. The crankshaft position sensor generates the crankshaft position signal based on rotation of the toothed wheel. The indicated work module generates an indicated work for a combustion cycle of a cylinder of an engine based on squares of first and second ones of the engine speeds and outputs the indicated work.

US Patent:

55734740, Nov 12, 1996

Filed:

Jun 28, 1994

Appl. No.:

8/267320

Inventors:

Richard A. Marsh - Beverly Hills MI
David P. Garrett - Sylvan Lake MI
Paul A. Bauerle - Dewitt MI
David S. Mathews - Okemos MI
Michael J. Vanek - South Lyon MI
Anthony E. Cubr - Flint MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B60K 4106
B60K 4128
F02P 515

US Classification:

477 91

Abstract:

An ignition timing control method for a vehicle which provides an engine torque output waveform for canceling vibrational disturbances caused by sudden throttle plate movement resulting in engine accelerations and decelerations. The ignition timing is variably advanced and retarded in accordance with a phase-shifted derivative of engine speed to produce an appropriate engine torque output waveform for optimally canceling the vehicle vibrational disturbances. The phase shift is accomplished by applying a time delay to the engine speed derivative. A negative bias is added to the ignition timing for retarding ignition timing by a predetermined amount to permit a full sinusoidal canceling waveform. A blend multiplier is utilized to gradually remove the effects of the canceling waveform and bias, thereby gradually returning the ignition timing to its original setting.

US Patent:

20200248618, Aug 6, 2020

Filed:

Feb 5, 2019

Appl. No.:

16/267499

Inventors:

- Detroit MI, US
Xiangkun Kong - Troy MI, US
David S. Mathews - Howell MI, US
Nicholas J. Kalweit - Novi MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

F02B 75/18
F02D 31/00
F02D 13/02
F02D 41/00

Abstract:

An engine control system of a vehicle includes a cylinder control module configured to: determine a target sequence for at least activating and deactivating cylinders of an engine based on a torque request; and activate and deactivate the cylinders of the engine according to the target sequence. A values module is configured to determine, based on the target sequence, a plurality of coefficients and an offset value. An indicated mean effective pressure (IMEP) determination module is configured to determine an IMEP of a first cylinder based on: the plurality of coefficients; the offset value; and a plurality of engine speeds at a predetermined crankshaft positions, respectively.