Chang Jie R Yang

US Patent:

6467469, Oct 22, 2002

Filed:

Jan 31, 2001

Appl. No.:

09/773040

Inventors:

Chang Yang - West Bloomfield MI
Gregory R. White - Columbus IN
Robert S. Henrich - Columbus IN
Yue Yun Wang - Columbus IN
John M. Janssen - Nashville IN
Ray C. Hatton - Columbus IN

Assignee:

Cummins, Inc. - Columbus IN

International Classification:

F02M 2507

US Classification:

12356821, 12356816

Abstract:

An EGR valve position control system includes an EGR valve manager responsive to an EGR valve command to drive an EGR valve actuator. The EGR valve manager is operable to schedule control gains as a function of valve actuation direction to provide for faster response during valve closing events. Valve closing events are also staged such that a large valve position step is followed by a steady ramp to the valve closed position to thereby prevent damage to the valve and/or valve seat. The EGR valve manager further includes a prioritized switching feature for strategically switching between closed and open loop control modes, and a forward gain adjustment feature responsive to battery voltage to maintain constant system DC gain under changing battery voltage conditions.

US Patent:

6543415, Apr 8, 2003

Filed:

Sep 9, 2002

Appl. No.:

10/237752

Inventors:

Ross Pursifull - Dearborn MI
Chang Yang - Farmington Hills MI

Assignee:

Visteon Global Technologies, Inc. - Dearborn MI

International Classification:

F02D 100

US Classification:

123396, 123399

Abstract:

A throttle miswire detection system including a powertrain control module (PCM) coupled to a throttle actuator and a pair of throttle plate position sensors. In detecting miswires, the PCM sets the throttle plate to a default position in which a default position value is measured by the position sensors. The PCM then sets the throttle plate to a closed position in which a closed position value is measured by the position sensors. After recording the receiving measurements, the PCM computes a negative slope sensor difference and a positive slope sensor difference. The PCM calculates a slope ratio consisting of the positive slope sensor difference divided by the negative slope sensor difference. If the slope values or slope ratio are not within prescribed limits, then the PCM deactivates the throttle actuator.

US Patent:

6837226, Jan 4, 2005

Filed:

Jan 31, 2001

Appl. No.:

09/774524

Inventors:

Yue Yun Wang - Columbus IN, US
Xiaoqui Li - Columbus IN, US
Mark R. Stepper - Columbus IN, US
Chang Yang - West Bloomfield MI, US

Assignee:

Cummins, Inc. - Columbus IN

International Classification:

F02M 2507
F02B 4708

US Classification:

12356816

Abstract:

An EGR fault/failure determination system for an internal combustion engine is operable to monitor a number of EGR system operational parameters and diagnose various EGR-related fault and failure statuses therefrom. For example, the system is operable to determine a number of EGR system-related fault and failure conditions by monitoring measured and command EGR position signals to determine EGR valve controller functionality, to monitor response times between fully open and closed EGR valve positions by comparing measured response times to a calibratable response time value, and to monitor in-range EGR position failures associated with fully closed and fully opened EGR valve position values. The system further includes a Kalman filter-based fault/failure isolation feature operable to isolate and identify one or more sources of EGR valve-related faults/failures.

US Patent:

6874470, Apr 5, 2005

Filed:

Mar 4, 2003

Appl. No.:

10/379492

Inventors:

Jeffrey R. Hedrick - Tecumseh MI, US
Ross Dykstra Pursifull - Dearborn MI, US
Chang Yang - Farmington Hills MI, US

Assignee:

Visteon Global Technologies, Inc. - Dearborn MI

International Classification:

F02D001/00

US Classification:

123396, 123399

Abstract:

A method to control the position of a throttle valve in the presence of a fault. The method works independently of throttle position in an open-loop mode. The method assures that the throttle plate will assume the default position if: 1) the return spring is functional and the motor is functional; 2) the return spring has failed but the motor is functional; or 3) if the return spring is functional but the motor has failed. This method does not need to detect loss of return spring functionality and it does not need to detect loss of motor functionality. The detected fault that initiates the action need not be related to either the return spring or the motor.

US Patent:

7114487, Oct 3, 2006

Filed:

Jan 16, 2004

Appl. No.:

10/758706

Inventors:

Jeffrey R. Hedrick - Tecumseh MI, US
Ross D. Pursifull - Dearborn MI, US
Chang Yang - Farmington Hills MI, US

Assignee:

Ford Motor Company - Dearborn MI

International Classification:

F02D 11/10

US Classification:

123399, 25112911, 701113

Abstract:

A method is disclosed for ensuring operation of a motorized throttle. The presence of an obstruction, such as ice, is detected inside the motorized throttle. The obstruction is then removed within a predetermined time to free the motorized throttle. A new closed throttle position is then recorded as a zero degree reference from which to control a throttle plate to a desired angle.