Method for changing the clutch torque in a clutch in the power train of a vehicle having an automated manual shift transmission

• US 7,025,708 B2
• Filed: 12/18/2003
• Issued: 04/11/2006
• Est. Priority Date: 06/27/2001
• Status: Expired due to Term

• Current Assignee: Schaeffler Technologies AG & Co.KG (INA-Holding Schaeffler GmbH & Co. KG)
• Original Assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG (INA-Holding Schaeffler GmbH & Co. KG)
• Inventors: Gerhart, Juergen, Vornehm, Martin, Rieger, Christian, Jung, Mario
• Primary Examiner(s): Pang, Roger
• Application Number:
  US10/739,703
• Publication Number:
  US 20040147367A1
• Time in Patent Office: 845 Days
• Field of Search: 477170- 1, 477/176, 477/74, 477/95, 477/156, 192/220
• US Class Current: 477/171
• CPC Class Codes: B60W 2540/12 Brake pedal position
• CPC Class Codes: B60W 30/18063 Creeping
• CPC Class Codes: F16D 2500/30406 Clutch slip
• CPC Class Codes: F16D 2500/3065 Torque of the engine
• CPC Class Codes: F16D 2500/3068 Speed change of rate of the engine
• CPC Class Codes: F16D 2500/3144 Accelerator pedal position
• CPC Class Codes: F16D 2500/50206 Creep control
• CPC Class Codes: F16D 2500/50257 During a creep operation
• CPC Class Codes: F16D 2500/5048 Stall prevention
• CPC Class Codes: F16D 48/06 Control by electric or electronic means, e.g. of fluid pressure

Abstract

A method for altering the coupling torque of a coupling in the drive train of a vehicle with an automatic gearbox and/or automatic coupling in a creep drive mode of a vehicle. According to the invention, the coupling torque is altered according to at least one variable, the parameter of the vehicle describing the creep drive mode thereof.

Claims

1. A method for changing a clutch torque of a clutch in a power train of a vehicle having an automated manual shift transmission and/or an automated clutch in a creep drive mode of the vehicle, the method comprising the steps of:

monitoring a strength of a vehicle brake actuation during the creep mode; and

reducing the clutch torque as a function of the strength of the vehicle brake actuation;

wherein the clutch torque is reduced at a first rate when the strength of the vehicle brake actuation is below a certain threshold and at a second rate faster than the first rate when the strength of the vehicle brake actuation is above the certain threshold.

2. The method as recited in claim 1 wherein the clutch torque is set to a further creep torque to maintain a creep drive mode if an accelerator pedal and a brake of the vehicle are not actuated.