U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Electronic control process for an automatic transmission

Patent 5549525 Issued on August 27, 1996. Estimated Expiration Date: Icon_subject December 14, 2014. 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.

Patent References

Vehicle transmission control system
Patent #: 4363389
Issued on: 12/14/1982
Inventor: Zaunberger ,   et al.

Creeping preventing apparatus in automatic transmission for vehicle
Patent #: 4513639
Issued on: 04/30/1985
Inventor: Hiramatsu

Idling control system for an automatic transmission providing anti roll back action
Patent #: 4648289
Issued on: 03/10/1987
Inventor: Kubo ,   et al.

Automatic clutch control apparatus
Patent #: 4804074
Issued on: 02/14/1989
Inventor: Kori

Brake force retaining control apparatus
Patent #: 4821854
Issued on: 04/18/1989
Inventor: Koshizawa

Starting speed stage selector in automatic transmission control system
Patent #: 4854194
Issued on: 08/08/1989
Inventor: Kaneko ,   et al.

Process and apparatus for realizing safe start-up shifting and energy saving idling of motor vehicles provided with automatic transmissions
Patent #: 4891758
Issued on: 01/02/1990
Inventor: Simonyi, et al.

Process for the gear change of automatic or synchronized mechanic transmission of motor vehicles
Patent #: 4930374
Issued on: 06/05/1990
Inventor: Simonyi, et al.

Automatic transmission for a motor vehicle with an overrunning clutch as a hill support
Patent #: 5170679
Issued on: 12/15/1992
Inventor: Merkle

Hydraulic control system for automatic transmission of automotive vehicle with exhaust braking system using vehicle payload sensing means
Patent #: 5315899
Issued on: 05/31/1994
Inventor: Mochizuki

More ...

Inventor

Assignee

Application

No. 351442 filed on 12/14/1994

US Classes:

477/93, Anti-creep477/114, Anticreep477/900, CONTROL SIGNAL IS VEHICLE WEIGHT477/901CONTROL SIGNAL IS SLOPE

Examiners

Primary: Marmor, Charles A.
Assistant: Kwon, Peter T.

Attorney, Agent or Firm

Foreign Patent References

  • 4118474 DE. 01/20/1992

International Class

B60K 041/20

Foreign Application Priority Data

1992-07-14 DE

Abstract

A process is disclosed for electronically controlling an automatic transmission in which the torque transmission is reduced when the engine throttle setting and vehicle speed are below a threshold. The transmitted torque causes the vehicle to creep slightly, warning the driver that a gear is engaged. The slant and load of the vehicle are taken into account for controlling the drive torque.

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