System and method for detecting vehicle movement based on driveline torque sensor
AssigneeGM Global Technology Operations LLC
InventorsRandall B. Dlugoss, John R. Maten, Micheal P Portell
Life of this patent
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Abstract
A system and method for detecting vehicle movement based on the measurement of the torque value on a vehicle drivetrain is disclosed. The system includes a torque sensor for measuring the torque on a vehicle drivetrain. This measured torque is utilized by a control module, with various other measured vehicle parameters, to determine if the conditions are such that vehicle movement may occur or has already begun. Possible vehicle movement is indicated when either the measured torque value exceeds a threshold value and changes towards zero, or big noise spikes are present in the torque sensor output signal.
Claims22
A system for detecting movement of a vehicle, comprising:
- a torque sensor that detects a torque value on a vehicle drivetrain;
- a transmission output speed sensor that senses a transmission speed;
- and
- a controller that i) determines a torque threshold based on a position of a shift lever and ii) determines, in response to the torque value being greater the torque threshold, whether the vehicle has moved from a stationary position based on the torque value and the sensed transmission speed.
A method of determining movement of a vehicle, the method comprising:
- detecting a torque value on a vehicle drivetrain;
- sensing a transmission speed;
- determining a torque threshold based on a position of a shift level;
- and
- determining, in response to the torque value being greater than the torque threshold, whether the vehicle has moved from a stationary position based on the torque value and the sensed transmission speed.
A system for detecting movement of a vehicle, comprising:
- a torque sensor that detects a torque value on an output of a vehicle drivetrain, wherein the torque value comprises a torque magnitude and a torque direction;
- a transmission output sensor that senses a transmission speed;
- and
- a controller that determines whether the vehicle has moved from a stationary position based on the torque value and the sensed transmission speed by
- determining a vehicle state,
- determining an expected torque value threshold based on the vehicle state,
- comparing the torque value to the expected torque value threshold, and
- determining that the vehicle has moved from a stationary position if the torque value is greater than the expected torque value threshold and the torque magnitude decreases.
Dependencies are inferred from the claim text.