Method for automatic calibration of automatic transmission
AssigneeVolvo Truck Corporation
InventorsLars Karlsson, Johan Bjernetun
Life of this patent
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Abstract
A method for automatic calibration of a position detection sensor of an automatic transmission including a gearshift actuator, the method including registering, using the position detection sensor, the position of the gearshift actuator upon power-up of the transmission; and performing a calibration of the position detection sensor if the registered position of the gearshift actuator is outside a predetermined expected position range of the gearshift actuator or within a predetermined abnormal position range of the gearshift actuator.
Claims27
Method for automatic calibration of position detection sensors of an automatic transmission comprising a plurality of gearshift actuators, each associated with an individual position detection sensor, the method comprising:
- registering, using the position detection sensors, the position of at least two gearshift actuators upon power-up of the transmission;
- and
- performing a calibration of the associated position detection sensors if each registered position of the at least two gearshift actuators is outside of a predetermined expected position range of the gearshift actuators, or if each registered position of the at least two gearshift actuators is within a predetermined abnormal position range of the at least two gearshift actuators.
A computer system for implementing a method for automatic calibration of a position detection sensor of an automatic transmission comprising a gearshift actuator, the method comprising:
- registering, using the position detection sensor, the position of the gearshift actuator upon power-up of the transmission;
- and
- performing a calibration of the position detection sensor if the registered position of the gearshift actuator is outside a predetermined expected position range of the gearshift actuator or is within a predetermined abnormal position range of the gearshift actuator.
Automatic transmission comprising a gearshift actuator, a position detection sensor, and a transmission control unit for controlling the gearshift actuator, wherein the control unit is arranged to perform automatic calibration of the position detection sensor by the steps of:
- registering, using the position detection sensor, the position of the gearshift actuator upon power-up of the transmission;
- and
- performing a calibration of the position detection sensor if the registered position of gearshift actuator is outside of a predetermined expected position range of the gearshift actuator or if the registered position of the gearshift actuator is within a predetermined abnormal position range of the gearshift actuator.
Dependencies are inferred from the claim text.