Yi I Cheng

US Patent:

6357431, Mar 19, 2002

Filed:

May 18, 2000

Appl. No.:

09/574537

Inventors:

Kenneth P DeGroot - Macomb Township MI
Yi Cheng - Jackson MI
Edward M Vuylsteke - Ann Arbor MI
Timothy A Coatesworth - Lake Orion MI
Jonathan F Rose - Westland MI
Bruce H Teague - Grosse Pointe Park MI
Michael J Reale - Royal Oak MI

Assignee:

DaimlerChrysler Corporation - Auburn Hills MI

International Classification:

F02D 4100

US Classification:

123694, 123696

Abstract:

A method of determining a goal voltage for a fuel/air sensor of an engine electronic fuel injection system includes the steps of determining a goal fuel/air sensor voltage, superimposing a wave form forcing function to the fuel/air sensor voltage for providing a goal fuel/air sensor voltage having a wave form pattern and controlling the engine to operate according to the goal fuel/air sensor voltage. The wave form forcing function provides the required fuel/air perturbations that are required to retain proper oxygen storage of the catalyst to maintain high three-way conversion efficiency.

US Patent:

6490517, Dec 3, 2002

Filed:

Jun 29, 2001

Appl. No.:

09/896766

Inventors:

Phillip B McGrath - Chelsea MI
Yi Cheng - Ypsilanti MI

Assignee:

DaimlerChrysler Corporation - Auburn Hills MI

International Classification:

B60K 4108

US Classification:

701 51, 701 54, 701 61, 477109

Abstract:

The present invention relates to a method for determining a maximum performance gear for an automobile when performing acceleration/deceleration maneuvers and a system for enhancing a motor vehicles gear indicator capabilities. More specifically, the present invention relates to a method for determining the optimal gear for operation of a manual transmission by obtaining vehicle speed and engine speed data and filtering such data through a mathematical filter implemented by a microprocessor. The application of the filter that may be adjusted throughout vehicle usage to optimize gear and transmission operability.

US Patent:

6705285, Mar 16, 2004

Filed:

Oct 31, 2001

Appl. No.:

10/003779

Inventors:

James W Yip - Bakersfield CA
Michael J Prucka - Grass Lake MI
Yi Cheng - Ypsilanti MI
Paul R Arlauskas - Walled Lake MI
Daniel B Diebel - Ypsilanti MI
Kerry D Franks - Chelsea MI
Gregory L Ohl - Ann Arbor MI

Assignee:

DaimlerChrysler Corporation - Auburn Hills MI

International Classification:

F02D 4100

US Classification:

123350, 701110

Abstract:

A method for characterizing an air flow target within an internal combustion engine. The method includes determining an air mass flow rate target, determining an engine speed term, and processing these terms to obtain an air flow target. The air flow target can be used as an input for vehicle controllers including those for controlling pressurized induction systems.

US Patent:

6732029, May 4, 2004

Filed:

Apr 24, 2002

Appl. No.:

10/131753

Inventors:

Colleen M Donahue - Manchester MI
Yi Cheng - Ypsilanti MI
Gary L Seitz - Chelsea MI
David A Barkman - Chelsea MI
Robert T Forgiel - Tecumseh MI
David P Ploucha - Ann Arbor MI
Richard K Moote - Ann Arbor MI
Zhong Li - Ann Arbor MI
Howard W Krausman - Dexter MI

Assignee:

DaimlerChrysler Corporation - Auburn Hills MI

International Classification:

G06F 1900

US Classification:

701 33, 731181, 701 29, 701101, 702183

Abstract:

A method of determining the quality of subsystems of an electronic engine control system is provided. The method monitors an engine parameter representative of a subsystem of interest and compares the parameter to at least one quality limit. The at least one quality limit represents an acceptable performance boundary for a fully functional engine control system. The method then indicates, based on the result of the comparison, whether the subsystem is of satisfactory quality. The method is arranged, without limitation, to determining the quality of start time, start flare, idle control during transmission shift, and speed control.

US Patent:

6847879, Jan 25, 2005

Filed:

Jan 30, 2004

Appl. No.:

10/769222

Inventors:

Roland T Richardson - Detroit MI, US
Yi Cheng - Ypsilanti MI, US
Pubudu Peiris - Windsor, CA
David Parenti - Waterford MI, US
Gang Chen - Rochester Hills MI, US

Assignee:

DaimlerChrysler Corporation - Auburn Hills MI

International Classification:

G06F 700

US Classification:

701 67, 701 54, 701110

Abstract:

A method for controlling slip in an EMCC equipped torque converter is provided. The method determines whether an EMCC slip rate exceeds a predetermined RPM, determines whether a crankshaft RPM acceleration exceeds a predetermined rate, reduces an output torque of an engine in response to one of said EMCC slip rate exceeding said predetermined RPM and said crankshaft RPM acceleration exceeding said predetermined rate; and disables said output torque of an engine in response to said EMCC slip rate being less than said predetermined RPM and said crankshaft RPM acceleration being less than said predetermined rate.

US Patent:

7597650, Oct 6, 2009

Filed:

Mar 22, 2006

Appl. No.:

11/386913

Inventors:

Michael E. Fingerman - West Bloomfield MI, US
Andrew J. Harkenrider - Rochester Hills MI, US
Mark J. Duty - Goodrich MI, US
Yi Cheng - Ann Arbor MI, US
Michael L. Plunkett - Lake Orion MI, US

Assignee:

Chrysler Group LLC - Auburn Hills MI

International Classification:

B60W 10/04
B60W 10/10

US Classification:

477110, 477118

Abstract:

A system for controlling the engagement and disengagement of one or more clutches that are adapted to operatively connect an engine and an automatic transmission includes a control device for determining if a negative torque condition exists and for providing an output or signal to decrease the rotational speed of the engine in response to the determination of the existence of the negative torque condition.

US Patent:

6041278, Mar 21, 2000

Filed:

Oct 29, 1997

Appl. No.:

8/958403

Inventors:

Jerry Kennie - Canton MI
Yi Cheng - Jackson MI
Mark E. Hope - Ann Arbor MI
Shean Huff - Ann Arbor MI
Robert J. Nankee - Canton MI
Mary Joyce - Farmington Hills MI
Dennis A. Krozek - Novi MI
Richard K. Moote - Ann Arbor MI
Roland T. Richardson - Detroit MI
William D. Rotramel - Plymouth MI
Gary L. Seitz - Chelsea MI

Assignee:

Chrysler Corporation - Auburn Hills MI

International Classification:

G01M 1500

US Classification:

701103

Abstract:

A method is provided for triggering a system for learning the percent alcohol content of a fuel used in a motor vehicle capable of operating on more than one type of fuel. The fuel composition learning system is triggered each time fuel is added to the vehicle's fuel tank, each time the engine is started when the fuel volume in the fuel tank falls below a given value or if a fuel level sending unit malfunction has been detected. The fuel composition learning system is also triggered if an error is detected in the value of the learned percent alcohol content of the fuel.

US Patent:

59412178, Aug 24, 1999

Filed:

Oct 29, 1997

Appl. No.:

8/959819

Inventors:

Yi Cheng - Jackson MI
Shean P. Huff - Ann Arbor MI
Dennis A. Krozek - Novi MI
Gary L. Seitz - Chelsea MI

Assignee:

Chrysler Corporation - Auburn Hills MI

International Classification:

F02D 4104

US Classification:

123494

Abstract:

The present invention provides a method of compensating for changing fuels in a flexible fueled vehicle using a fuel composition sensor. The methodology detects and models an alcohol concentration transition at fuel injector tips following a fuel addition. The methodology improves the accuracy of engine fueling during an alcohol concentration change by delaying the application of a fuel composition multiplier until the fuel analyzed by the fuel composition sensor actually reaches the injectors.