Search

Zhengyu Dai Phones & Addresses

  • 6681 Weatherfield Way, Canton, MI 48187 (734) 467-6291 (734) 737-9334
  • 6681 Weatherfield Way, Canton, MI 48187 (734) 904-2470

Work

Position: Professional/Technical

Education

Degree: Graduate or professional degree

Publications

Us Patents

Producing Vehicle Creep Through A Transmission Without A Torque Converter

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US Patent:
8260513, Sep 4, 2012
Filed:
May 24, 2010
Appl. No.:
12/785629
Inventors:
Matthew J. Shelton - Grosse Ile MI,
Hong Jiang - Canton MI,
Chunlin Liu - Plymouth MI,
Zhengyu Dai - Canton MI,
Michael G. Fodor - Dearborn MI,
Assignee:
Ford Global Technologies, LLC - Dearborn MI
International Classification:
G06F 17/00
US Classification:
701 68
Abstract:
A method for controlling creep in a vehicle having no transmission torque converter, includes operating an input clutch of the transmission at a desired clutch torque capacity, using a feed-forward engine torque to minimize the impact on the engine speed when additional load on the engine occurs from increasing the clutch torque capacity, producing a desired clutch slip by controlling engine idle speed, and achieving a desired vehicle speed by controlling the input clutch torque capacity.

Active Damping Tip-In Clutch Control Of A Vehicle Transmission

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US Patent:
8550961, Oct 8, 2013
Filed:
Jun 9, 2011
Appl. No.:
13/156476
Inventors:
Hong Jiang - Canton MI,
Matthew J. Shelton - Grosse Ile MI,
Zhengyu Dai - Canton MI,
Davor D. Hrovat - Ann Arbor MI,
Bradley D. Riedle - Northville MI,
Alexander P. McDonnell - Dexter MI,
Assignee:
Ford Global Technologies, LLC - Dearborn MI
International Classification:
B60W 10/02
B60W 30/20
F16D 48/06
US Classification:
477175, 477180, 701 67, 192103 R
Abstract:
A method for controlling an input clutch of a vehicle transmission during a tip-in includes using a current gear and rate of change of transmission input speed to determine a first torque modifier, if a peak or trough occurred in input speed, using the current gear and a difference between measured input speed and expected input speed to determine a second torque modifier, and changing a torque capacity of the clutch using said modifiers.

System And Method For Controlling A Window Wiper System

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US Patent:
20080263807, Oct 30, 2008
Filed:
Apr 30, 2007
Appl. No.:
11/742087
Inventors:
Zhang Yan - Northville MI,
Amer Malik - Shelby Township MI,
Zhengyu Dai - Canton MI,
Issa Aljanabi - Windsor,
Assignee:
FORD GLOBAL TECHNOLOGIES, LLC - Dearborn MI
International Classification:
B60S 1/08
US Classification:
1525012
Abstract:
A windshield wiper system for use on a hybrid electric vehicle is capable of adjusting the delay between consecutive cycles based on engine state and vehicle speed. The system includes a windshield wiper and a motor coupled to the windshield wiper. A sensor generates an engine speed signal and another sensor generates a vehicle speed signal. A processor in communication with the sensors and wiper motor provides a drive signal to the wiper motor which is based on the engine and vehicle speed.

Damping Oscillations During A Gear Ratio Change Of A Dual Clutch Powershift Transmission

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US Patent:
20110307150, Dec 15, 2011
Filed:
Jun 15, 2010
Appl. No.:
12/815849
Inventors:
Hong Jiang - Canton MI,
Zhengyu Dai - Canton MI,
Matthew J. Shelton - Grosse Ile MI,
Assignee:
FORD GLOBAL TECHNOLOGIES, LLC - Dearborn MI
International Classification:
G06F 19/00
B60W 30/18
B60W 10/02
US Classification:
701 54, 477 77
Abstract:
A method for controlling an upshift in a vehicle transmission includes transferring engine torque from an offgoing clutch to an oncoming clutch, using a torque capacity of the offgoing clutch to dampen oscillations when a difference between a speed of a transmission offgoing input and a calculated expected speed of said input is greater than a reference speed difference, and modulating engine torque during a ratio change phase of the shift.

Pre-Staging And Boosting For Downshifts To Increase Regenerative Braking

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US Patent:
20130292223, Nov 7, 2013
Filed:
May 7, 2012
Appl. No.:
13/465654
Inventors:
Felix Nedorezov - Rochester Hills MI,
Hong Jiang - Birmingham MI,
Matthew John Shelton - Grosse Ile MI,
Zhengyu Dai - Canton MI,
Assignee:
FORD GLOBAL TECHNOLOGIES, LLC - Dearborn MI
International Classification:
B60W 10/11
US Classification:
192220
Abstract:
A hybrid vehicle has a battery, a regenerative braking system, a transmission, and a controller. The controller boosts and strokes a hydraulic cylinder of an on-coming clutch when the state-of-charge of the battery allows regenerative braking and in response to a pedal actuation. The controller boosts and strokes the hydraulic cylinder before a disconnect clutch is opened and the transmission is downshifted to increase regenerative braking efficiency.

Adjusting Motor Torque To Enable Slip Of Torque Converter Clutch To Be Maintained When Accelerator Pedal Released In Hybrid Vehicle

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US Patent:
20130296103, Nov 7, 2013
Filed:
May 7, 2012
Appl. No.:
13/465145
Inventors:
Zhengyu Dai - Canton MI,
Peter John Grutter - Plymouth MI,
Roger Lyle Huffmaster - Canton MI,
Hong Jiang - Birmingham MI,
Felix Nedorezov - Rochester Hills MI,
Assignee:
FORD GLOBAL TECHNOLOGIES, LLC - Dearborn MI
International Classification:
B60W 10/02
US Classification:
477 5
Abstract:
A controller and a control strategy for a hybrid electric vehicle having a traction motor between an engine and an automatic transmission include maintaining a bypass clutch of a torque converter in an engaged position and applying a motor torque from a traction motor to the torque converter such that slip of the torque converter does not otherwise reach zero while the bypass clutch is maintained in the engaged position.

Method And System For Controlling Driveline Lash In A Hybrid Vehicle

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US Patent:
20130296106, Nov 7, 2013
Filed:
May 7, 2012
Appl. No.:
13/465327
Inventors:
Zhengyu Dai - Canton MI,
Hong Jiang - Birmingham MI,
Felix Nedorezov - Rochester Hills MI,
Marvin Paul Kraska - Dearborn MI,
Assignee:
FORD GLOBAL TECHNOLOGIES, LLC - Dearborn MI
International Classification:
B60W 10/02
US Classification:
477 5, 903902, 180 65275
Abstract:
A vehicle has an engine, an upstream clutch, an electric machine, a downstream clutch, a transmission gearbox, and a controller. The controller is configured to: (i) control engagement of the downstream clutch, (ii) monitor a vehicle torque, and (iii) control electric machine torque to a designated rate when the vehicle torque changes direction and the electric machine is operating. A method for controlling a hybrid vehicle includes engaging a clutch downstream of the electric machine, monitoring a vehicle torque, and controlling electric machine torque to a designated rate when vehicle torque changes direction and the electric machine is operating. A hybrid vehicle system has an electric machine and a controller configured to (i) control electric machine torque to a designated rate within a time zone, and (ii) control at least one of the electric machine torque and an engine torque to meet driver demand outside of the zone.

Method And Apparatus For Starting An Engine Of A Modular Hybrid Transmission Based Upon Demanded Torque

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US Patent:
20130296109, Nov 7, 2013
Filed:
May 7, 2012
Appl. No.:
13/465358
Inventors:
Felix Nedorezov - Rochester Hills MI,
Hong Jiang - Birmingham MI,
Matthew John Shelton - Grosse Ile MI,
Bernard D. Nefcy - Novi MI,
Daniel Scott Colvin - Farmington Hills MI,
Zhengyu Dai - Canton MI,
Roger Lyle Huffmaster - Canton MI,
Assignee:
FORD GLOBAL TECHNOLOGIES, LLC - Dearborn MI
International Classification:
B60W 10/08
US Classification:
477 5
Abstract:
A control system including a method and apparatus for operating a hybrid vehicle. A disconnect clutch selectively separates an electric machine from a combustion engine. If a wide open throttle or high torque command is requested and the combustion engine is shut down, a 12 volt starter may be used to start the combustion engine while disconnected from the electric machine and all of the electric machine torque available may be used for traction.
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