Calibration method for a slip control arrangement of a driveline including a continuously variable transmission
AssigneeTransmission Cvtcorp Inc.
InventorsJonathan Guérin, Jean-François Dionne
Life of this patent
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Abstract
A calibration method for a slip control arrangement of a driveline including a continuously variable transmission is described herein. The driveline includes a clutch that is so controlled as to slip when a torque higher than the usable torque attempts to pass through. Accordingly, the clutch prevents the prime mover from stalling. A calibration method to link a valve command value and a torque allowed to pass through the clutch includes preventing the vehicle from moving and increasing the pressure applied in the clutch while noting the torque % value developed by the prime mover.
Claims5
A calibration method to determine the filling time of a clutch controlled by a proportional valve, the clutch being part of a driveline including a prime mover and a controller so connected to the prime mover as to receive torque data therefrom;
- the method comprising:
- subjecting the clutch to a sequence of short pulses of valve opening at a predetermined valve command value, the successive short pulses increasing in duration while the torque data received is monitored by the controller;
- stopping the short pulses when a change is detected in the torque data received;
- and
- setting the filling time of the clutch as the last pulse duration of valve opening supplied to the clutch.
Dependencies are inferred from the claim text.