Control apparatus for vehicle

Patent metadata

Field	Value
Publication number	US-10119580-B2
Application number	US-201515327087-A
Country	US
Kind code	B2
Filing date	Jul 24, 2015
Priority date	Jul 28, 2014
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

A vehicle includes a continuously variable transmission, a gear mechanism and a controller. The continuously variable transmission and the gear mechanism are provided in parallel with each other between an input shaft and an output shaft. The controller is configured to i) when the vehicle travels in a state where both a first clutch and a third clutch provided on the gear mechanism side are released, gradually increase a hydraulic pressure of the first clutch such that the first clutch is engaged, ii) calculate a command hydraulic pressure for setting the first clutch to a pressure regulating state on the basis of a command hydraulic pressure of the first clutch at a timing at which the amount of change in an output-side rotation speed of the first clutch becomes larger than a predetermined value, and iii) control the first clutch by using the calculated command hydraulic pressure.

First claim

What is claimed is:

1. A control apparatus for a vehicle, the vehicle including
an engine,
a drive wheel,
an input rotating member to which power of the engine is transmitted,
an output rotating member configured to output the power to the drive wheel,
a continuously variable transmission mechanism,
a gear mechanism having a gear stage, the continuously variable transmission mechanism and the gear mechanism being provided in parallel with each other between the input rotating member and the output rotating member,
a clutch mechanism configured to selectively change a torque transmission path between a first path and a second path, the first path being configured to transmit the power of the engine to the drive wheel via the gear mechanism, the second path being configured to transmit the power of the engine to the drive wheel via the continuously variable transmission mechanism, the clutch mechanism including a first clutch and a second clutch, the first clutch being provided in the first path, the second clutch being provided in the second path, and
a power transmission system including a third clutch, the third clutch being arranged in the first path between the first clutch and the output rotating member, the control apparatus comprising:
at least one electronic control unit configured to
when the vehicle travels by using the power that is transmitted through the second path where both the first clutch and the third clutch are released,
(i) gradually increase a hydraulic pressure of the first clutch such that the first clutch is engaged,
(i) calculate a command hydraulic pressure for setting the first clutch to a pressure regulating state based on a command hydraulic pressure of the first clutch at a timing at which an amount of change in an output-side rotation speed of the first clutch becomes larger than a predetermined value, and
(iii) control the first clutch by using the command hydraulic pressure.

2. The control apparatus according to claim 1 , wherein
the electronic control unit is configured to, where a change in rotation of the input rotating member is suppressed through shift control over the continuously variable transmission mechanism, gradually increase the hydraulic pressure of the first clutch such that the first clutch is engaged.

3. The control apparatus according to claim 1 , wherein
the electronic control unit is configured to control the first clutch by using the command hydraulic pressure calculated in a period during which the amount of change in a rotation state of the input rotating member is smaller than or equal to a predetermined amount.

4. The control apparatus according to claim 1 , wherein
the amount of change in the output-side rotation speed of the first clutch occurs after the output-side rotation speed of the first clutch has increased due to a drag of the first clutch caused by input-side rotation of the first clutch.

5. The control apparatus according to claim 1 , wherein
the third clutch is a dog clutch.

Assignees

• Toyota Motor Co Ltd

Inventors

• Sakamoto Kazuya
• Ayabe Atsushi
• Nitani Hiromitsu
• Kondo Hiroki
• Matsuo Kenji
• Fukao Mitsuhiro

Classifications

• F16D2500/1026

  Hydraulic · CPC title

• F16D2500/50251

  During operation · CPC title

• F16H2037/0873

  with switching means, e.g. to change ranges · CPC title

• F16H2061/0087

  Adaptive control, e.g. the control parameters adapted by learning · CPC title

• F16H61/30

  Hydraulic {or pneumatic} motors {or related fluid control means} therefor · CPC title