Regenerative control apparatus for vehicles equipped with a lock-up clutch

Patent 7329204 Issued on February 12, 2008. Estimated Expiration Date:

December 27, 2025. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Vehicle control apparatus capable of selective slip control of lock-up clutch during deceleration and automatic shift-down of transmission during downhill road running
Patent #: 5816979
Issued on: 10/06/1998
Inventor: Shiiba, et al.

Automotive vehicle lock-up clutch control apparatus wherein change of line pressure for lock-up clutch slip control valve is restricted during slip control mode
Patent #: 5842953
Issued on: 12/01/1998
Inventor: Yasue, et al.

Lock-up control system for automatic transmission
Patent #: 6597979
Issued on: 07/22/2003
Inventor: Hagiwara, et al.

Parallel hybrid vehicle Patent #: 6805211
Issued on: 10/19/2004
Inventor: Fujikawa

Inventors

Assignee

Denso Corporation

Application

No. 11316911 filed on 12/27/2005

US Classes:

477/5, With clutch control477/180, Regulated clutch engagement180/65.3, With means on vehicle for generating power for the electric motor903/942, Control of motor or generator (EPO/JPO)477/176, Slip rate control477/174, Condition responsive control701/67, Clutch control180/65.2Combined with nonelectric drive means

Examiners

Primary: Marmor, Charles A.
Assistant: Holmes, Justin K.

Attorney, Agent or Firm

Oliff & Berridge, PLC

Foreign Patent References

A 07-310566 JP 11/01/1995
A 2000-134713 JP 05/01/2000
A 2004-224110 JP 08/01/2004

International Class

B60W 10/02

Abstract

For regenerative generation at deceleration of a vehicle, a regenerative control apparatus for vehicles equipped with a lock-up clutch comprises a control unit for controlling rotary electric machine and the lock-up clutch. When the clutch is in a complete disengagement state or a slipping state at deceleration, the control unit controls the rotary electric machine to execute regenerative generation at a partial generation level lower than a regenerative generation level in a complete engagement state. When the clutch is in a complete engagement state at regenerative generation, the control unit controls the clutch so that the coupling state is transferred to a slipping state or a complete disengagement state when the number of revolutions having correlation to engine speed becomes lower than a predetermined threshold. Thus, recovering efficiency of the regenerative braking energy can be enhanced, while suppressing engine stall due to drastic increase of engine load torque.

Other References

Korean Intellectual Property Office, Notice of Preliminary Rejection, Oct. 31, 2006, Relating to Korean Application No. 10-2005-0130964, English Translation.