# US 10,119,580 B2 · Control apparatus for vehicle

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- Number: US 10,119,580 B2
- Document ID: US10119580B2
- Status: Granted
- Kind: B2
- Application number: 15/327,087
- Filed: 2015-07-24
- Published: 2017-06-08
- Granted: 2018-11-06
- Earliest claimed: 2014-07-28
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Kazuya Sakamoto; Atsushi Ayabe; Hiromitsu Nitani; Hiroki Kondo; Kenji Matsuo; Mitsuhiro Fukao
- Web page: https://patentgrep.com/patent/US10119580B2

## CPC

- F16D 48/062: {of a clutch system with a plurality of fluid actuated clutches}
- F16D 48/066: {Control of fluid pressure, e.g. using an accumulator (F16D48/062, F16D48/068 take precedence)}
- F16H 37/0846: {CVT using endless flexible members}
- F16H 61/00: Control functions within {control units of} change-speed- or reversing-gearings for conveying rotary motion {; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing}
- F16H 61/30: Hydraulic {or pneumatic} motors {or related fluid control means} therefor
- F16D 11/00: Clutches in which the members have interengaging parts (arrangements for synchronisation F16D23/02)
- F16D 2500/1026: Hydraulic
- F16D 2500/10412: Transmission line of a vehicle
- F16D 2500/10462: Dog-type clutch
- F16D 2500/1088: CVT
- F16D 2500/30417: Speed change rate of the input shaft
- F16D 2500/30428: Speed change rate of the output shaft
- F16D 2500/501: Relating the actuator
- F16D 2500/50239: Soft clutch engagement
- F16D 2500/50251: During operation
- F16H 37/022: {the toothed gearing having orbital motion}
- F16H 2037/026: {Layouts with particular features of reversing gear, e.g. to achieve compact arrangement}
- F16H 2037/0873: {with switching means, e.g. to change ranges}
- F16H 2061/0087: {Adaptive control, e.g. the control parameters adapted by learning}
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16H: GEARING

## 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.

## Claims

### Claim 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.

### Claim 2 (depends on 1)

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.

### Claim 3 (depends on 1)

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.

### Claim 4 (depends on 1)

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.

### Claim 5 (depends on 1)

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