Lan K Wang

US Patent:

7900615, Mar 8, 2011

Filed:

Oct 1, 2008

Appl. No.:

12/243045

Inventors:

Zhong Wang - Bellevue WA, US
Lan Wang - Troy MI, US
Ian J. Mac Ewen - White Lake MI, US
Igor Anilovich - Walled Lake MI, US
Steven Ward Majors - Howell MI, US
Cheol S. Lee - Ann Arbor MI, US

International Classification:

F02D 41/00

US Classification:

123672, 701109

Abstract:

A control system comprising an oxygen sensor that generates an oxygen signal based on an oxygen concentration level in an exhaust gas of an engine, a filtering module that determines a filtered signal based on the oxygen signal, and an air-fuel imbalance detection module that detects an air-fuel imbalance in the engine based on the oxygen signal and the filtered signal. A method comprising generating an oxygen signal based on an oxygen concentration level in an exhaust gas of an engine, determining a filtered signal based on the oxygen signal, and detecting an air-fuel imbalance in the engine based on the oxygen signal and the filtered signal.

US Patent:

7950375, May 31, 2011

Filed:

Jul 16, 2008

Appl. No.:

12/174109

Inventors:

Zhong Wang - Bellevue WA, US
Tony T. Hoang - Warren MI, US
Lan Wang - Troy MI, US
Gary L. Rogers - Davison MI, US
Scott A. Kegebein - Brighton MI, US
William R. Cadman - Fenton MI, US

International Classification:

F02D 41/00
F02D 33/02

US Classification:

123520

Abstract:

A control system comprising a detection module that detects at least one of a vehicle speed and an engine speed and a canister vent valve control module that selectively modulates the canister vent valve based on at least one of the vehicle speed and the engine speed. A method comprising detecting at least one of a vehicle speed and an engine speed and selectively modulating a canister vent valve based on at least one of the vehicle speed and the engine speed.

US Patent:

8000856, Aug 16, 2011

Filed:

Jan 9, 2009

Appl. No.:

12/351247

Inventors:

John F. Larsen - Campbellcroft, CA
Zhong Wang - Bellevue WA, US
Michael Pickett - Ajax, CA
Lan Wang - Troy MI, US

International Classification:

G01M 17/00
G06F 7/00

US Classification:

701 34, 701 29, 701 31, 701 49

Abstract:

A diagnostic system for a vehicle comprises a refueling indicator module and a diagnostic module. The refueling indicator module selectively indicates when a refueling event occurs. The diagnostic module selectively diagnoses a fault in a fuel door position sensor when the fuel door position sensor indicates that a fuel door is in one of an open position for less than a first predetermined period when the refueling event occurs and a closed position for greater than a second predetermined period when the refueling event occurs.