Quan Zheng from 3229 Buckhorn Ct, Ann Arbor, MI 48105, age 57, Phone: 7346684173

Resumes

Sqa/Purchasing At Volvo 3P

view source

Location:

Gteborg Area, Sweden

Industry:

Automotive

Quan Zheng

view source

Quan Zheng

view source

Us Patents

Model-Based Control Of A Solenoid-Operated Hydraulic Actuator For Engine Cylinder Deactivation
view source
US Patent:

6588394, Jul 8, 2003
Filed:

Sep 14, 2001
Appl. No.:

09/953090
Inventors:

Quan Zheng - Ann Arbor MI
Assignee:

Delphi Technologies, Inc. - Troy MI
International Classification:

F01L 134
US Classification:

123198F, 123 9016
Abstract:

An improved control method for a solenoid-operated hydraulic actuator for deactivating an engine valve mechanism characterizes the dynamic response of the mechanism based on a lumped parameter model of the solenoid, the hydraulic sub-system, and a locking pin mechanism actuated by a control pressure developed by the hydraulic sub-system. In response to a mode change request, constituent delay times associated with the solenoid, the hydraulic sub-system, and the locking pin mechanism are determined and summed to form an estimate of the overall delay time required to complete the requested cylinder deactivation. The solenoid activation is then scheduled based on the estimated delay time and a window of opportunity in the engine cycle for cylinder deactivation.

Method For Generating An Electro-Hydraulic Model For Control Design
view source
US Patent:

7689309, Mar 30, 2010
Filed:

Jul 3, 2007
Appl. No.:

11/773204
Inventors:

Quan Zheng - Ann Arbor MI, US
Assignee:

Delphi Technologies, Inc. - Troy MI
International Classification:

G06F 19/00
G06G 7/50
US Classification:

700 97, 703 9
Abstract:

The dynamic response characteristics of an electro-hydraulic (EH) physical plant is represented by a model. The model includes a series of second order transfer functions, one for each operating point, of the EH physical plant. Command pressure, overshoot, rise time, damping coefficient, natural frequency and gain parameters are determined in developing each transfer function. The model can be used to advance the time in which the design and development of a control system for the EH physical plant can begin.

Method For Real-Time Learning Of Actuator Transfer Characteristics
view source
US Patent:

8170761, May 1, 2012
Filed:

Mar 3, 2008
Appl. No.:

12/041219
Inventors:

Jeremy J. Kraenzlein - Northville MI, US
Quan Zheng - Ann Arbor MI, US
Assignee:

Delphi Technologies, Inc. - Troy MI
International Classification:

G06F 19/00
US Classification:

701 59, 701 58
Abstract:

In a pressure control system having a solenoid-operated fluid valve that has an output hydraulic pressure which varies in accordance with a solenoid input signal, a dynamic learning block is configured to adjust the initial, default values for control points stored in a pressure-current (P-I) data table based on observed (measured) operating points that reflect the solenoid's actual transfer characteristic. A feed forward control block is configured to generate the solenoid input signal having a level based on the adjusted control points in the data table, which improves the accuracy of the solenoid input signal. An adjustment method uses a plurality of circular buffers each configured to store observed operating points falling within a respective range, and provides a mechanism to allow adjustment of the control points based on only partial data.

Automatic Transmission With Closed Loop Pressure Electro-Hydraulic Control Module
view source
US Patent:

8192318, Jun 5, 2012
Filed:

Dec 15, 2009
Appl. No.:

12/638350
Inventors:

Duane Z. Collins - El Paso TX, US
Andrew D. Herman - Grand Blanc MI, US
Michael A. Kozan - Canton MI, US
Quan Zheng - Ann Arbor MI, US
Assignee:

Delphi Technologies, Inc. - Troy MI
International Classification:

F16H 47/08
F16H 31/00
US Classification:

475 64, 475 70, 475127
Abstract:

An automatic transmission is disclosed that includes a clutch pressure control module housing having therein:The solenoid valves provide hydraulic control signals to clutch hydraulic pressure control valves, which in turn provide hydraulic power to clutch actuators.

Transmission Clutch Pressure Controls Via Pilot Pressure Feedback
view source
US Patent:

20080236539, Oct 2, 2008
Filed:

Mar 26, 2007
Appl. No.:

11/691153
Inventors:

Quan Zheng - Ann Arbor MI, US
Michael A. Kozan - Canton MI, US
International Classification:

F16H 59/00
US Classification:

1231971
Abstract:

A transmission clutch pressure control apparatus is suitable for a configuration that includes a pilot valve and a pressure regulating valve working in tandem. The pilot valve produces a pilot pressure that varies in accordance with a pilot valve drive signal. The pressure regulating valve provides fluid to a clutch at an output clutch pressure that is in turn variable based on the pilot pressure. The apparatus includes a pilot pressure sensor in fluid communication with the pilot valve output and generates a pilot pressure signal. The apparatus also includes a control arrangement having a pilot valve pressure estimation block configured to produce a pilot pressure command in response to a clutch pressure command. The estimation block is configured to reflect the relationship between the clutch pressure and the pilot pressure. The control arrangement also includes a summer that produces an error signal based on the difference between the commanded and sensed pilot pressure. The control arrangement also includes additional control blocks implementing a control strategy that ultimately develops and output the pilot valve drive signal all based on the pilot pressure command and the pilot pressure error signal.

Dynamic Learning Of Solenoid P-I Curves For Closed Loop Pressure Controls
view source
US Patent:

20090222179, Sep 3, 2009
Filed:

Mar 3, 2008
Appl. No.:

12/041197
Inventors:

Quan Zheng - Ann Arbor MI, US
Jeremy J. Kraenzlein - Northville MI, US
International Classification:

G06F 19/00
US Classification:

701 58
Abstract:

In a pressure control system having a solenoid-operated fluid valve that has an output hydraulic pressure which varies in accordance with a solenoid input signal, a dynamic learning block is configured to adjust the initial, default values for control points stored in a pressure-current (P-I) data table based on observed (measured) operating points that reflect the solenoid's actual transfer characteristic. A feed forward control block is configured to generate the solenoid input signal having a level based on the adjusted control points in the data table, which improves the accuracy of the solenoid input signal. An adjustment method uses a plurality of circular buffers each configured to store observed operating points falling within a respective range, and provides a mechanism to allow adjustment of the control points based on only partial data.

Model Based Brake Pressure Estimation
view source
US Patent:

6508522, Jan 21, 2003
Filed:

Mar 5, 2002
Appl. No.:

10/091677
Inventors:

Qingyuan Li - Ann Arbor MI
Quan Zheng - Ann Arbor MI
Keith W. Beyer - Novi MI
Assignee:

Delphi Technologies, Inc. - Troy MI
International Classification:

B60T 824
US Classification:

303139
Abstract:

A method and apparatus are provided for estimating brake pressure in a disk brake caliper, on the basis of a simplified mathematical model. The simplified model is limited to operating conditions in which the caliper piston is holding the brake pads in contact with the rotor, wherein higher order terms and certain fluid dependent terms of the model can be eliminated, thereby simplifying the model to the point that it can be readily used in an effective and efficient manner for estimating fluid pressure in the cylinder of the caliper. The displacement of the piston is estimated while the piston is holding the brake pad in contact with the rotor, as a function of an exchange of fluid between the pressure source and the cylinder. The brake pressure in the cylinder is determined as a function of the displacement of the piston while the piston is holding the brake pad in contact with the rotor. The exchange of fluid between the cylinder and pressure source is estimated as a function of a difference in pressure between the cylinder and the source.

Techniques For Controlling Pedal-Off Downshifts Of A Vehicle Transmission
view source
US Patent:

20190257417, Aug 22, 2019
Filed:

Feb 21, 2018
Appl. No.:

15/901478
Inventors:

Steven B. Christ - Ann Arbor MI, US
Stephen Tokish - Sylvania OH, US
Quan Zheng - Superior Township MI, US
International Classification:

F16H 61/08
F16H 61/02
F16H 61/04
Abstract:

A transmission control system and method involve receiving, by a controller and from a turbine shaft speed sensor, a rotational speed of a turbine shaft of an automatic transmission, receiving, by the controller and from an output shaft speed sensor, a plurality of rotational speeds of an output shaft of the transmission, determining, by the controller, a shift time modifier based on the turbine shaft speed and a gradient of the output shaft speed, modifying, by the controller, a shift time for a pedal-off downshift of the transmission based on the shift time modifier to obtain a modified shift time, and controlling, by the controller, the pedal-off downshift of the transmission based on the modified shift time.