Parking pawl engagement control with feedback

Patent metadata

Field	Value
Publication number	US-9132811-B2
Application number	US-201313794303-A
Country	US
Kind code	B2
Filing date	Mar 11, 2013
Priority date	Mar 11, 2013
Publication date	Sep 15, 2015
Grant date	Sep 15, 2015

Abstract

A system and method for improving the consistency of a hybrid vehicle parking pawl engagement control. A hybrid vehicle includes a motor-generator, a planetary gear, a parking pawl, and a processor. The hybrid vehicle uses feedback to more accurately determine that the parking pawl is fully engaged. The parking pawl is applied to the planetary gear. The processor determines a target movement for the hybrid vehicle and commands a torque from the motor-generator to achieve the target movement. The processor determines that the parking pawl has fully engaged and locked the planetary gear.

First claim

What is claimed is:

1. A system for parking pawl engagement control of a hybrid vehicle comprising:
a plurality of wheels;
a planetary gear;
a motor-generator geared to the plurality of wheels through the planetary gear;
a parking pawl for engaging the planetary gear; and
a processor configured to:
determine a target torque value of the motor-generator based on at least one of a target movement value that corresponds to a movement of the hybrid vehicle or a target speed v…

Assignees

• Toyota Eng & Mfg North America

Inventors

• Dufford Mohammad E
• Stefanon Heraldo F

Classifications

• B60T1/062

  Operations & Transport · mapped topic

• F16D2125/36

  Mechanical Engineering · mapped topic

• B60T7/18

  Operations & Transport · mapped topic

• B60T7/12 Primary

  Operations & Transport · mapped topic

• B60T1/005

  Operations & Transport · mapped topic