Patent ID: 9166520
Filing Date: 2015-10-20
Classification: F16H,H02P

Abstract:
1. A range switching device, comprising: a range switching mechanism that switches a shift range between a plurality of shift ranges including a P range; a motor driving the range switching mechanism to switch the shift range; an encoder sensing a rotation of the motor and outputting a pulse signal in synchronization with the rotation of the motor; and a controller that controls the motor to be rotated to a rotation position corresponding to a target shift range based on a count value of the outputted pulse signal of the encoder and causes the range switching mechanism to switch the shift range to the target shift range, wherein when the controller is reset and restarted during a switching operation of the shift range, the controller (i) sets a limit position of a movable range of the range switching mechanism to either of a first limit position corresponding to the P range or a second limit position corresponding to a range opposite to the P range, based on the shift range before and after being switched, (ii) controls the motor to rotate until the range switching mechanism abuts against the limit position, and (iii) learns the rotation position of the motor as a reference position when the range switching mechanism abuts against the limit position.