Shift range control apparatus

• US 10,644,622 B2
• Filed: 03/06/2017
• Issued: 05/05/2020
• Est. Priority Date: 04/15/2016
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Kamio, Shigeru
• Primary Examiner(s): Chan, Kawing
• Assistant Examiner(s): Brown, Bradley R
• Application Number:
  US16/093,158
• Publication Number:
  US 20190131896A1
• Time in Patent Office: 1,156 Days
• CPC Class Codes: F16H 2061/2823 Controlling actuator force way characteristic, i.e. controlling force or movement depending on the actuator position, e.g. for adapting force to synchronisation and engagement of gear clutch
• CPC Class Codes: F16H 2061/326 Actuators for range selection, i.e. actuators for controlling the range selector or the manual range valve in the transmission
• CPC Class Codes: F16H 59/08 Range selector apparatus
• CPC Class Codes: F16H 61/28 with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
• CPC Class Codes: F16H 61/32 Electric motors actuators or related electrical control means therefor
• CPC Class Codes: F16H 63/3425 characterised by pawls or wheels
• CPC Class Codes: H02P 6/153 wherein the commutation is advanced from position signals phase in function of the speed

Abstract

A shift range control apparatus switches shift range by controlling the drive of a motor. The shift range control apparatus includes a feedback controller that is configured to perform position feedback control based on a target angle determined corresponding to the request shift range and the actual angle of the motor; a stationary phase energization controller that is configured to perform stationary phase energization control that energizes a stationary phase selected corresponding to an actual angle; and a switching controller that switches between motor control states. The switching controller switches the control state to position feedback control when the request shift range is switched. When the difference between the target angle and the actual angle becomes equal to or less than an angle determination threshold value, the switching controller switches the control state from position feedback control to the stationary phase energization control.

Claims

1. A shift range control apparatus switching a shift range by controlling a drive of a motor, the shift range control apparatus comprising:

a feedback controller that is configured to perform position feedback control based on an actual angle of the motor and a target angle determined corresponding to a request shift range;

a stationary phase energization controller that is configured to perform stationary phase energization control energizing a stationary phase selected corresponding to the actual angle; and

a switching controller that is configured to switch a control state of the motor,

wherein;

the switching controller sets the control state to the position feedback control when the request shift range is switched;

the switching controller switches the control state from the position feedback control to the stationary phase energization control when a difference value between the target angle and the actual angle becomes equal to or less than an angle determination threshold value;

the switching controller continues the stationary phase energization control until an energization duration elapses after the position feedback control is switched to the stationary phase energization control; and

the switching controller switches the control state to an energization off control in which an energization to the motor is shut off, at the time when the energization duration elapses after the position feedback control has been switched to the stationary phase energization control.

2. The shift range control apparatus according to claim 1, wherein:

the feedback controller is provided with a phase advance filter that is configured to advance phase of the actual angle.

3. The shift range control apparatus according to claim 1, wherein:

the switching controller changes the angle determination threshold value corresponding to a rotation speed of the motor.

4. The shift range control apparatus according to claim 1, wherein:

in the stationary phase energization control, the stationary phase energization controller fixes an excitation phase by causing current to flow in a predetermined direction of the selected stationary phase to cause the motor to stop at a predetermined electrical angle corresponding to the fixed excitation phase.