Vehicle control device

Patent metadata

Field	Value
Publication number	US-2024059155-A1
Application number	US-202318493405-A
Country	US
Kind code	A1
Filing date	Oct 24, 2023
Priority date	Apr 28, 2021
Publication date	Feb 22, 2024
Grant date	—

Abstract

A vehicle control device controls a vehicle drive system including a main motor as a drive source of a vehicle, a parking lock mechanism, and an actuator. The vehicle control device includes an actuator drive control section that controls a drive of the actuator, a main motor drive control section that controls a drive of the main motor, and a range determination unit that determines whether or not a shift range is a parking range. When releasing the parking lock, if the parking range is not released within a parking range release determination time that is variable according to an operating environment, the main motor drive control section performs a meshing surface pressure reduction control for driving the main motor so as to reduce a meshing surface pressure between a parking gear and a parking lever.

First claim

What is claimed is:

1 . A vehicle control device for controlling a vehicle drive system,
the vehicle drive system including
a main motor as a driving source of a vehicle,
a parking lock mechanism having a parking gear connected to an axle and a parking lever configured to be engaged with the parking gear so that an engagement of the parking gear and the parking lever allows the axle to be locked, and
an actuator configured to drive the parking lever, the vehicle control device comprising:
an actuator drive control section configured to control a drive of the actuator; a main motor drive control section configured to control a drive of the main motor; and a range determination section configured to determine whether a shift range is a parking range, wherein when the parking lock is released, if the parking range is not released within a parking range release determination time, which is variable according to an operating environment, the main motor drive control section performs a meshing surface pressure reduction control for driving the main motor so as to reduce a meshing surface pressure between the parking gear and the parking lever.

2 . The vehicle control device according to claim 1 , wherein
the parking range release determination time is variable according to a tilt angle of the vehicle.

3 . The vehicle control device according to claim 1 , wherein
the parking range release determination time is variable according to a weight of the vehicle.

4 . The vehicle control device according to claim 1 , wherein
the parking range release determination time is variable according to a temperature of the actuator.

5 . The vehicle control device according to claim 1 , wherein
the parking range release determination time is variable according to an input voltage of the actuator.

6 . The vehicle control device according to claim 1 , wherein
the actuator has a usage environment region where the parking lock is not released when the meshing surface pressure is generated.

Assignees

• Denso Corp

Inventors

• Harada Akihiro
• Kamio Shigeru
• Nakayama Seiji

Classifications

• F16H63/50

  Signals to an engine or motor · CPC title

• F16H63/48 Primary

  Signals to a parking brake {or parking lock; Control of parking locks or brakes being part of the transmission} · CPC title

• B60L15/20 Primary

  for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed · CPC title

• F16H63/3466

  using electric motors · CPC title

• F16H59/52

  dependent on the weight of the machine, e.g. change in weight resulting from passengers boarding a bus · CPC title