# US 12,222,032 B2 · Control device for vehicle, control method for vehicle, and non-transitory computer-readable medium

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- Number: US 12,222,032 B2
- Document ID: US12222032B2
- Status: Granted
- Kind: B2
- Application number: 18/575,174
- Filed: 2022-06-20
- Published: 2024-12-26
- Granted: 2025-02-11
- Earliest claimed: 2021-07-02
- Assignees: JATCO Ltd; Nissan Motor Co., Ltd.
- Applicants: JATCO Ltd; Nissan Motor Co., Ltd.
- Inventors: Koichi Okuno; Keisuke Iwado; Makoto Oguri; Akira Tsuchida
- Web page: https://patentgrep.com/patent/US12222032B2

## CPC

- F16H 61/0031: {using auxiliary pumps, e.g. pump driven by a different power source than the engine}
- F16H 59/42: Input shaft speed
- F16H 59/72: dependent on oil characteristics, e.g. temperature, viscosity
- F16H 59/48: Inputs being a function of acceleration
- F16H 63/40: comprising signals other than signals for actuating the final output mechanisms
- F16H: GEARING

## Abstract

A control device for a vehicle, the vehicle including a belt continuously variable transmission including a mechanical oil pump driven by an engine and an electric oil pump driven by an electric motor, the engine being configured to drive a drive wheel, in which when a rotation speed of the engine is less than or equal to a prescribed rotation speed as the vehicle decelerates, driving of the electric motor is controlled to supply a hydraulic pressure from the electric oil pump to the belt continuously variable transmission, and when the deceleration of the vehicle exceeds a prescribed deceleration, the driving of the electric motor is restricted not to supply the hydraulic pressure from the electric oil pump to the belt continuously variable transmission.

## Claims

### Claim 1

A control device for a vehicle, the vehicle including a transmission including a first oil pump driven by a first drive source and a second oil pump driven by a second drive source, the first drive source being configured to drive a drive wheel, wherein
the second drive source is configured to drive the second oil pump while the vehicle is running,
when a rotation speed of the first drive source is less than or equal to a prescribed rotation speed as the vehicle decelerates, driving of the second drive source is controlled to supply a hydraulic pressure from the second oil pump to the transmission, and
when the vehicle is decelerating and a deceleration of the vehicle exceeds a prescribed deceleration, the driving of the second drive source is restricted not to supply the hydraulic pressure from the second oil pump to the transmission.

### Claim 2 (depends on 1)

The control device for the vehicle according to claim 1, wherein
the prescribed deceleration changes depending on an oil temperature.

### Claim 3 (depends on 2)

The control device for the vehicle according to claim 2, wherein
the prescribed deceleration increases as the oil temperature increases.

### Claim 4 (depends on 3)

The control device for the vehicle according to claim 3, wherein
when the oil temperature is greater than or equal to a prescribed oil temperature, the driving of the second drive source is controlled to supply the hydraulic pressure from the second oil pump to the transmission.

### Claim 5

A control method for a vehicle, the vehicle including a transmission including a first oil pump driven by a first drive source and a second oil pump driven by a second drive source, the first drive source being configured to drive a drive wheel and the second drive source being configured to drive the second oil pump while the vehicle is running, the control method comprising:
controlling driving of the second drive source to supply a hydraulic pressure from the second oil pump to the transmission when a rotation speed of the first drive source is less than or equal to a prescribed rotation speed as the vehicle decelerates; and
restricting the driving of the second drive source not to supply the hydraulic pressure from the second oil pump to the transmission when the vehicle is running and a deceleration of the vehicle exceeds a prescribed deceleration.

### Claim 6

A non-transitory computer-readable medium storing a program executable by a computer for controlling a vehicle, the vehicle including a transmission including a first oil pump driven by a first drive source and a second oil pump driven by a second drive source, the first drive source being configured to drive a drive wheel and the second drive source being configured to drive the second oil pump while the vehicle is running, the program causing the computer to execute:
a procedure of controlling driving of the second drive source to supply a hydraulic pressure from the second oil pump to the transmission when a rotation speed of the first drive source is less than or equal to a prescribed rotation speed as the vehicle decelerates; and
a procedure of restricting the driving of the second drive source not to supply the hydraulic pressure from the second oil pump to the transmission when the vehicle is running and a deceleration of the vehicle exceeds a prescribed deceleration.