# US 10,501,086 B2 · Method for controlling hybrid vehicle

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- Number: US 10,501,086 B2
- Document ID: US10501086B2
- Status: Granted
- Kind: B2
- Application number: 15/818,620
- Filed: 2017-11-20
- Published: 2019-02-21
- Granted: 2019-12-10
- Earliest claimed: 2017-08-18
- Assignees: Hyundai Motor Company; Kia Motors Corporation
- Applicants: Hyundai Motor Company; Kia Motors Corporation
- Inventors: Young Jun Lee; Jung Wan Choi
- Web page: https://patentgrep.com/patent/US10501086B2

## CPC

- B60W 30/1846: {Preventing of breakage of drive line components, e.g. parts of the gearing}
- B60W 10/02: including control of driveline clutches
- B60W 10/08: including control of electric propulsion units, e.g. motors or generators
- B60W 10/11: Stepped gearings
- B60W 20/00: Control systems specially adapted for hybrid vehicles {(hybrid vehicle design, B60K6/00; electric vehicles B60L)}
- B60W 20/10: Controlling the power contribution of each of the prime movers to meet required power demand
- B60W 30/186: excessive wear or burn out of friction elements, e.g. clutches
- B60W 2510/0241: Clutch slip, i.e. difference between input and output speeds
- B60W 2510/081: Speed
- B60W 2510/083: Torque
- B60W 2510/1015: Input shaft speed, e.g. turbine speed
- B60W 2520/10: Longitudinal speed
- B60W 2520/105: Longitudinal acceleration
- B60W 2540/10: Accelerator pedal position
- B60W 2710/027: Clutch torque
- B60W 2710/081: Speed
- B60W 2710/083: Torque
- B60W 2710/1083: pressure of control fluid
- B60Y 2200/92: Hybrid vehicles
- Y10S 903/93: Conjoint control of different elements
- 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
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A method for controlling a hybrid vehicle may include detecting, in a controller, a circumstance that a vehicle is rapidly decelerated and then rapidly accelerated; confirming that a transmission clutch slipped in the controller as a result of performing the detecting; reducing a driving torque and a motor speed while minimizing a hydraulic pressure of the transmission clutch in the controller, in the case that the transmission clutch has slipped as a result of performing the confirming; determining when the transmission clutch is available for synchronization in the controller while performing the reducing; and normalizing the hydraulic pressure of the transmission clutch and the driving torque in the controller, in the case that it is determined that the transmission clutch is available for synchronization as a result of performing the determining.

## Claims

### Claim 1

A method for controlling a hybrid vehicle, the method comprising:
detecting, by a controller, a circumstance that the vehicle is decelerated and then accelerated;
confirming, by the controller, that a transmission clutch has slipped, in a case of detecting the circumstance that the vehicle is decelerated and then accelerated as a result of performing the detecting;
reducing, by the controller, a driving torque and a motor speed while minimizing a hydraulic pressure of the transmission clutch, when the transmission clutch has slipped as a result of performing the confirming that the transmission clutch has slipped, in the case of detecting the circumstance that the vehicle is decelerated and then accelerated as the result of performing the detecting;
determining, by the controller, when the transmission clutch is available for synchronization while performing the reducing; and
normalizing, by the controller, the hydraulic pressure of the transmission clutch and the driving torque, when the controller determines that the transmission clutch is available for the synchronization as a result of performing the determining.

### Claim 2 (depends on 1)

The method for controlling the hybrid vehicle according to claim 1,
wherein at the detecting, the controller is configured to detect as the circumstance that the vehicle is decelerated and then accelerated, when a depression amount of an accelerator pedal is more than Middle Tip-in (MTI) within a predetermined time period from a timing that an acceleration of the vehicle is more than a reference acceleration and a vehicle speed is less than a reference vehicle speed.

### Claim 3 (depends on 1)

The method for controlling the hybrid vehicle according to claim 1,
wherein at the confirming, the controller is configured to verify that the transmission clutch has slipped when the motor speed is more than a sum of an input shaft speed of the transmission and a predetermined speed.

### Claim 4 (depends on 1)

The method for controlling the hybrid vehicle according to claim 1,
wherein at the reducing, the controller is configured to determine and control a minimum of the hydraulic pressure of the transmission clutch based on the driving torque.

### Claim 5 (depends on 1)

The method for controlling the hybrid vehicle according to claim 1,
wherein at the determining, the controller is configured to determine as a status that the transmission clutch is available for the synchronization, when a difference between the motor speed and an input shaft speed of the transmission is less than a reference value.

### Claim 6 (depends on 1)

The method for controlling the hybrid vehicle according to claim 1,
wherein at the normalizing, the controller is configured to control normalization of the hydraulic pressure of the transmission clutch and the driving torque based on a depression amount of an accelerator pedal.