×

Method of controlling the drive train of a motor vehicle and drive train controller of a motor vehicle

  • US 6,287,237 B1
  • Filed: 04/12/2000
  • Issued: 09/11/2001
  • Est. Priority Date: 04/13/1999
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of controlling a drive train of a motor vehicle, which comprises:

  • converting a brake signal issued via a brake pedal of a motor vehicle into a required braking torque;

    determining a setpoint value for an engine drag torque based on the required braking torque; and

    providing a down-shift characteristic diagram from which a setpoint transmission ratio to be set can be determined as a function of the setpoint value for the engine drag torque and of a variable functionally associated with a speed of the motor vehicle, and having characteristic curves defined by taking into account a minimum engine torque; and

    automatically setting a transmission ratio of an automatic transmission of the motor vehicle by reference to the down-shift characteristic diagram.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×