Range switchover apparatus

Patent metadata

Field	Value
Publication number	US-8942898-B2
Application number	US-201313916887-A
Country	US
Kind code	B2
Filing date	Jun 13, 2013
Priority date	Jul 18, 2012
Publication date	Jan 27, 2015
Grant date	Jan 27, 2015

Abstract

In a range switchover control apparatus, a microcomputer checks, under a state that driving force of a motor is released, whether a range switchover mechanism is at rest and whether the range switchover mechanism is at rest in a bottom position, that is, whether an engagement member is fitted deep into a bottom of a range holding recess. If the range switchover mechanism is at rest in the bottom position, an encoder count value at a reference position (bottom position of a P-range) is calculated based on a present range and an encoder count value. By using the present range and the calculated encoder count value, an encoder count value of the bottom position of the present range can be determined. Based on this encoder count value, the encoder count value at the reference position can be calculated.

First claim

What is claimed is:

1. A range switchover apparatus comprising:
a motor;
a range switchover mechanism for switching over a shift range among plural ranges by the motor as a drive source;
an encoder for outputting a pulse signal in synchronism with rotation of the motor;
a detent mechanism for holding the range switchover mechanism at each range position by allowing an engagement member to be fitted in a range holding recess, when the range switchover mechanism is switched ov…

Assignees

• Denso Corp

Inventors

• Yamada Jun

Classifications

• F16H2061/326

  Mechanical Engineering · mapped topic

• F16H2061/283

  Mechanical Engineering · mapped topic

• F16H63/38

  Mechanical Engineering · mapped topic

• F16H61/32 Primary

  Mechanical Engineering · mapped topic

• F16H59/105 Primary

  Mechanical Engineering · mapped topic