US 2020/0347930 A1Published application

Shift range control device

AssigneeDenso Corporation

InventorShigeru KAMIO

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Abstract

A motor angle calculation unit acquires from a motor rotation angle sensor a motor rotation angle signal corresponding to a rotational position of the motor, and calculates a motor angle based on the motor rotation angle signal. An output shaft signal acquisition unit acquires, from an output shaft sensor that detects a rotational position of an output shaft, an output shaft signal corresponding to the rotational position of an output shaft. An abnormality determination unit determines abnormality in the output shaft sensor. A target angle setting unit sets a target rotation angle corresponding to a target shift range. A drive control unit controls driving of the motor so that the motor angle becomes a target rotation angle. The target angle setting unit sets the target rotation angle to different values when the output shaft sensor is normal and when the output shaft sensor is abnormal.

Claims9

Dependent claims

A shift range control device for controlling a shift range switching system, which switches a shift range of a vehicle by controlling driving of a motor, the shift range control device comprising:

a motor angle calculation unit configured to acquire a motor rotation angle signal corresponding to a rotational position of the motor from a motor rotation angle sensor, which detects a rotation of the motor, and calculating a motor angle based on the motor rotation angle signal;
an output shaft signal acquisition unit configured to acquire an output shaft signal corresponding to a rotational position of the output shaft from an output shaft sensor, which detects a rotational position of an output shaft rotated by the rotation of the motor;
an abnormality determination unit configured to determine an abnormality of the output shaft sensor;
a target angle setting unit configured to set a target rotation angle corresponding to a target shift range;
and
a drive control unit configured to control the driving of the motor such that the motor angle attains the target rotation angle,
wherein the target angle setting unit is configured to set the target rotation angle to different values between a case that the output shaft sensor is normal and a case that the output shaft sensor is abnormal.

4 more elements

A shift range control device for controlling a shift range switching system, which switches a shift range of a vehicle by controlling driving of a motor and includes a rotation member having a plurality of recess portions and a protrusion portion between the recess portions and rotatable with the output shaft, an engagement member engageable with the recess portion corresponding to the shift range, and a biasing member biasing the engagement member to be fitted in the recess portion, the shift range control device being configured to execute processing of:

acquiring a motor rotation angle signal corresponding to a rotational position of the motor from a motor rotation angle sensor, which detects a rotation of the motor, and calculating a motor angle based on the motor rotation angle signal;
acquiring an output shaft signal corresponding to a rotational position of the output shaft from an output shaft sensor, which detects a rotational position of an output shaft rotated by the rotation of the motor;
determining whether the output shaft sensor is normal or abnormal;
setting a target rotation angle corresponding to a target shift range to different values between a case that the output shaft sensor is determined to be normal and a case that the output shaft sensor is determined to be abnormal;
and
driving the motor to attain the target rotation angle,
wherein the processing of setting sets the target rotation angle to a first target value corresponding to the rotational position of the output shaft, at which the engagement member is fitted in a bottom of the recess portion of the target shift range in case that the output shaft sensor is determined to be normal, and a second target value corresponding to the rotational position of the output shaft, at which the engagement member is located within a positioning range to be movable to the bottom of the recess portion in case that the output shaft sensor is determined to be abnormal, the positioning range being set to enable the engagement member to be fitted in the bottom of the recess portion by the biasing member when the motor is stopped.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/930,671Filed 16 Jul 2020
Priority: JP 2018-00701019 Jan 2018
Published: 5 Nov 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

F16H 59/105
Comprising levers: consisting of electrical switches or sensors
F16H 61/12
Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid…
F16H 61/32
With at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted: electric motors ,…
H02P 6/12
Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position;…:…