# US 2018/0023690 A1 · Control device of vehicle

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- Number: US 2018/0023690 A1
- Document ID: US20180023690A1
- Status: Published application
- Kind: A1
- Application number: 15/654,254
- Filed: 2017-07-19
- Published: 2018-01-25
- Earliest claimed: 2016-07-25
- Assignees: Toyota Jidosha Kabushiki Kaisha; Aisin Aw Co., Ltd.
- Applicants: Toyota Jidosha Kabushiki Kaisha; Aisin Aw Co., Ltd.
- Inventors: Norihiro TSUKAMOTO; Tomohiro ASAMI; Keisuke OTA; Hiromasa TAKAI
- Web page: https://patentgrep.com/patent/US20180023690A1

## CPC

- 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}
- B60W 30/00: Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- F16H 61/0437: {by using electrical signals (F16H61/0403 and F16H61/061 take precedence)}
- F16H 61/061: {using electric control means}
- F16H 61/22: Locking {of the control input devices} (constructional features of locking or disabling mechanisms F16H63/34)
- F16D 2500/10412: Transmission line of a vehicle
- F16H 59/18: dependent on the position of the accelerator pedal
- F16H 2061/0096: {using a parameter map}
- F16H 2061/0492: {for high engine torque, e.g. during acceleration or uphill driving}
- F16H 2061/0496: {for low engine torque, e.g. during coasting, sailing or engine braking}
- F16H: GEARING
- B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

## Abstract

A control device of a vehicle including a motor and a multi-speed type automatic transmission including a plurality of engagement devices, the control device engaging the engagement device to be engaged and releasing the engagement device to be released when the shift is determined, and controlling an engagement pressure of an engagement device to be released during an upshift in a driven state and a downshift in a driving state and controlling an engagement pressure of an engagement device to be engaged during an upshift in the driving state and a downshift in the driven state so as to control a rotation speed of a rotating element of the automatic transmission, the control device increasing an instruction pressure of the engagement device to a target surge pressure for a target surge time when switching is performed during the upshift and the downshift in the driven state, to the driving state.

## Claims

### Claim 1

A control device of a vehicle including a motor and a multi-speed type automatic transmission configured to include a plurality of engagement devices, the automatic transmission shifted to a plurality of gear positions by switching an engagement state of the plurality of engagement devices, the control device of the vehicle including a shift control portion configured to engage the engagement device to be engaged during a shift and to release the engagement device to be released during the shift when the shift to a predetermined gear position is determined,
the shift control portion configured to control an engagement hydraulic pressure of an engagement device to be released during the shift so as to control a rotation speed of a rotating element of the automatic transmission during an upshift in a driven state in which a drive torque is not output from the motor, and to control an engagement hydraulic pressure of an engagement device to be engaged during the shift so as to control the rotation speed of the rotating element of the automatic transmission during an upshift in a driving state in which a drive torque is output from the motor, the shift control portion configured to control the engagement hydraulic pressure of the engagement device to be engaged during the shift so as to control the rotation speed of the rotating element of the automatic transmission during a downshift in the driven state in which a drive torque is not output from the motor, and to control the engagement hydraulic pressure of the engagement device to be released during the shift so as to control the rotation speed of the rotating element of the automatic transmission during a downshift in the driving state in which a drive torque is output from the motor,
the control device of a vehicle comprising: a hydraulic pressure surge control portion configured to increase an instruction pressure of the engagement device controlling the rotation speed of the rotating element of the automatic transmission to a predetermined target surge pressure for a target surge time when switching is performed during the upshift of the automatic transmission in the driven state in which a drive torque is not output from the motor, to the driving state in which a drive torque is output from the motor,
the hydraulic pressure surge control portion configured to increase an instruction pressure of the engagement device controlling the rotation speed of the rotating element of the automatic transmission to a predetermined target surge pressure for a target surge time when switching is performed during the downshift of the automatic transmission in the driven state in which a drive torque is not output from the motor, to the driving state in which a drive torque is output from the motor.

### Claim 2 (depends on 1)

The control apparatus of a vehicle according to claim 1, wherein the magnitude of the target surge pressure and the target surge time are set based on a target torque of the motor.

### Claim 3 (depends on 1)

The control apparatus of a vehicle according to claim 1, wherein the target surge time is adjusted based on a piston stroke end attainment degree estimated based on a time during which the instruction pressure of the engagement device subjected to the output of the target surge pressure is less than a preset piston stroke end pressure at which a space is eliminated between a piston and an engagement element constituting the engagement device and a time during which the instruction pressure is equal to or greater than the piston stroke end pressure.