Guojun Shi

US Patent:

6631611, Oct 14, 2003

Filed:

May 30, 2001

Appl. No.:

09/867977

Inventors:

Guojun Shi - Wixom MI
Sharanjit Singh - Farmington Hills MI
Minghui Kao - Rochester Hills MI
David W. Dempsey - Highland MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F01N 300

US Classification:

60285, 60274, 60276, 60284, 123691, 701103, 701109

Abstract:

A method of initializing the catalyst converter for monitoring the conversion efficiencies of a catalytic converter by measuring the oxygen storage capacity (OSC) of the converter. The measurement of the OSC indicates the degree of health of the converter. Under the same engine running conditions, the greater the OSC measurement, the healthier the converter. The catalyst needs to be set to either a rich state or a lean state prior to the measurement of its OSC time. This process is called catalyst state initialization. The catalyst has to be fully saturated from test to test in order to make consistent OSC measurements. This is through open loop fuel control by commanding a lean air to fuel ratio and then monitoring thepost-O2 sensor voltage until it falls below a calibrated value (e. g. 80 mV) indicating a lean state. The system continues to command a lean air to fuel ratio (e. g.

US Patent:

6694243, Feb 17, 2004

Filed:

Feb 27, 2001

Appl. No.:

09/794607

Inventors:

Guojun Shi - Wixom MI
Sharanjit Singh - Farmington Hills MI
Minghui Kao - Rochester Hills MI
David N. Benton - Birmingham MI
David W. Dempsey - Highland MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F01N 1100

US Classification:

701114, 731181, 60276

Abstract:

An on-board catalyst diagnostic for monitoring the conversion efficiencies of a catalytic converter by measuring the oxygen storage capacity (OSC) of the converter. The measurement of the OSC indicates the degree of health of the converter. Under the same engine running conditions, the greater the OSC measurement, the healthier the converter. A modeled OSC is compared to the real OSC to determine a normalized OSC. The normalized OSC is compared to a predetermined threshold value in order to determine the health of the converter. The modeled OSC takes into consideration variables which will affect the value of the OSC.

US Patent:

6802181, Oct 12, 2004

Filed:

Jan 14, 2003

Appl. No.:

10/341616

Inventors:

Wenbo Wang - Novi MI
Matthew J. Roelle - Menlo Park CA
Guojun Shi - Canton MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F01N 300

US Classification:

60289, 60274, 60276, 60277

Abstract:

Method and apparatus to monitor secondary air injection and catalyst conversion efficiency. The method includes operating an engine in a rich condition after detecting an engine steady state condition. The secondary air injector injects air into an exhaust stream to simulate a lean engine condition. The injection of the air into the exhaust stream is ceased after both inlet and outlet sensors detect the lean condition. After ceasing air injection, a lag time is determined between the inlet sensor detecting the rich condition and the outlet sensor detecting the rich operating condition. An oxygen storage capacity of the catalytic converter is calculated based on the lag time. An efficiency of the catalytic converter is determined as a function of the storage capacity. Additionally, performance of the secondary air injector is monitored. If the inlet sensor fails to detect the lean condition after the secondary air injector is active, a fault is signaled.

US Patent:

6877486, Apr 12, 2005

Filed:

Sep 15, 2003

Appl. No.:

10/662840

Inventors:

Benjamin D. Ellies - Ann Arbor MI, US
Mark E. Johnston - Highland MI, US
Guojun Shi - Canton MI, US
Michael Denny Parr - Highland MI, US

Assignee:

General Motors Corporation - Detroit MI

International Classification:

F02M051/00

US Classification:

123478, 73119 A

Abstract:

Methods and apparatus for accurately predicting a fuel injector tip temperature (FITT) are described. One technique for predicting the temperature of a fuel injector tip in an engine suitably includes the steps of estimating an initial temperature of the fuel injector tip and calculating a steady state temperature of the fuel injector tip. A filter coefficient is determined as a function of a rate of airflow into the engine, and the temperature of the fuel injector tip is predicted as a function of said initial temperature, the steady state temperature, and the filter coefficient. In a further embodiment, the steady state temperature is filtered into a feedback temperature at a rate that is determined by the filter coefficient.

US Patent:

7546761, Jun 16, 2009

Filed:

Mar 17, 2006

Appl. No.:

11/385045

Inventors:

Chuan He - Northville MI, US
Richard B. Jess - Haslett MI, US
Jay Tolsma - Grand Ledge MI, US
GuoJun Shi - Canton MI, US
Jose L. DeLeon - Madison Heights MI, US
Kouji Sakumoto - Commerce Township MI, US

Assignee:

GM Global Technology Operations, Inc. - Detroit MI

International Classification:

G01M 15/10

US Classification:

7311469

Abstract:

A temperature sensor rationality control system for an exhaust treatment system having an oxidation catalyst includes an oxidation catalyst inlet temperature sensor that generates an inlet temperature signal and an oxidation catalyst outlet temperature sensor that generates an outlet temperature signal. A control module determines whether a difference based on the inlet temperature signal and the outlet temperature signal is below a difference threshold when an exhaust temperature is within a threshold range.

US Patent:

20060225527, Oct 12, 2006

Filed:

Apr 6, 2005

Appl. No.:

11/099401

Inventors:

Ching-Min Yang - Beijing, CN
Guojun Shi - Canton MI, US

International Classification:

F16H 3/08

US Classification:

074330000

Abstract:

An automatic transmission utilizes a shift support system using combination of coupled clutch assemblies with a fluid drive and a gear system to provide multi-speed ratios with one reverse ratio without excessive heat generation. The fluid drive has an impeller and a turbine, and each coupled clutch assembly has two respective inputs from the fluid drive impeller and turbine with one output to the gear system. Each coupled clutch assembly provides possibilities of either connection or disconnection for engine to alternatively obtain different gear ratio speeds, or drive both odd and even gears at the same time for a smooth shift transition. Utilization of the shift support system with torque transmitting elements to provide connections between different gear sets allows the transmission to be operated in higher reliability and less complicated control than dual clutch transmission with similar efficiency.

US Patent:

20090199666, Aug 13, 2009

Filed:

Feb 12, 2008

Appl. No.:

12/030175

Inventors:

Ching-Min Yang - Beijing, CN
Jian-Gang Lu - Datong, CN
Daming Wang - Beijing, CN
Guojun Shi - Canton MI, US

International Classification:

F16H 3/08
F16H 3/093

US Classification:

74331, 74333

Abstract:

This invention relates to a transmission gearbox family to provide five, six, seven, eight and nine speed ratios with a reverse speed ratio and a neutral condition in motor vehicles. The invention arranges a plurality of gearwheels in parallel shaft systems such that minimum number of gearwheels is obtained by either combination of clutches with synchronizers for transmission gearboxes with a torque converter and direct clutch to clutch gearboxes without a torque converter, or synchronizers for automated manual transmission gearboxes. For total number of the gearwheels involving in forward driving, five-speed transmission gearboxes have eight gearwheels, six-speed transmission gearboxes have minimum of nine gearwheels, seven-speed transmission gearboxes have minimum of nine gearwheels, eight-speed transmission gearboxes have minimum of nine gearwheels and nine-speed transmission gearboxes have minimum of nine gearwheels, respectively. Each family member has three parallel shafts with either selectively or continuously interconnected with the gearwheels through the engaged single or multiple torque transmitting mechanisms. The direct clutch-to-clutch gearboxes without a torque converter and automated manual gearboxes have a mechanical damper and a main clutch.

US Patent:

61289485, Oct 10, 2000

Filed:

Feb 16, 1999

Appl. No.:

9/249994

Inventors:

Guojun Shi - Wixom MI
James R. Yurgil - Livonia MI
Randall L. Gallagher - Capac MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

G01M 1500

US Classification:

731181

Abstract:

A method for monitoring engine coolant warm-up behavior utilizing a model-based algorithm which provides a moving threshold for accumulated air or accumulated fuel entering into the engine. The algorithm allows for coolant temperature monitoring under a wide range of transient and steady state driving conditions while maintaining safeguards that prevent a false detection. The accumulated air (or fuel) delivered to the engine during the warm-up interval is used to represent the total heat generated by the engine during the warm-up interval. A time-varying moving calculated accumulated air threshold is therefore defined which can deliver accurate pass-fail decisions in conjunction with a predetermined target temperature.