# US 10,865,722 B2 · Method for extended driving mode of hybrid vehicle and extended driving mode system thereof

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- Number: US 10,865,722 B2
- Document ID: US10865722B2
- Status: Granted
- Kind: B2
- Application number: 16/373,515
- Filed: 2019-04-02
- Published: 2020-02-13
- Granted: 2020-12-15
- Earliest claimed: 2018-08-13
- Assignees: Hyundai Motor Company; Kia Motors Corporation
- Applicants: Hyundai Motor Company; Kia Motors Corporation
- Inventors: Jae-Bum Park
- Web page: https://patentgrep.com/patent/US10865722B2

## CPC

- F02D 41/0087: {Selective cylinder activation, i.e. partial cylinder operation (deceleration cut-off F02D41/123)}
- B60W 10/04: including control of propulsion units
- B60W 10/06: including control of combustion engines
- B60W 10/08: including control of electric propulsion units, e.g. motors or generators
- B60W 20/11: using model predictive control [MPC] strategies, i.e. control methods based on models predicting performance {(utilising navigation and traffic information in the control strategy B60W20/12)}
- B60W 20/13: in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
- B60W 30/18127: {Regenerative braking}
- F02D 41/042: {for stopping the engine}
- B60W 2710/0627: Fuel flow rate
- B60W 2710/0666: Engine torque
- F02D 2041/0012: {with selective deactivation of cylinders}
- Y02T 10/62: Hybrid vehicles
- F02D: CONTROLLING COMBUSTION ENGINES (vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed B60K31/00; conjoint control of vehicle sub-units of different type or different function, road vehicle drive control systems for purposes other than the control of a single sub-unit B60W)
- 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
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A method for extended driving mode of a hybrid vehicle mounted with a cylinder of an engine deactivation (CDA) device may include controlling to switch cylinders of an engine into an idle state through a variable valve control mechanism in an engine stop mode.

## Claims

### Claim 1

A method for extended driving mode of a hybrid vehicle mounted with a cylinder of an engine deactivation (CDA) device, including:
controlling to perform an idle state switching of cylinders of an engine,
wherein the controlling to perform the ideal state switching of the cylinders is implemented by a CDA mode control through a controller; and
wherein the CDA mode control when the engine of the hybrid vehicle is stopped includes:
selecting, by the controller, an electric vehicle (EV) mode in which a motor is used as a power source and a regenerative braking mode in which power generation is performed by the motor;
performing, by the controller, CDA mode switching in association with a variable valve control mechanism;
performing, by the controller, CDA mode application for switching the cylinders of the engine into an idle mode, and
switching, by the controller, a CDA non-operation control not to operate the variable valve control mechanism when the electric vehicle (EV) mode or the regenerative braking mode are not selected.

### Claim 2 (depends on 1)

The method of claim 1, wherein the variable valve control mechanism is the cylinder of the engine deactivation (CDA) device.

### Claim 3 (depends on 1)

The method of claim 1, wherein the EV mode is applied prior to the regenerative braking mode.

### Claim 4 (depends on 3)

The method of claim 3, wherein the regenerative braking mode is applied when the engine does not consume a fuel.

### Claim 5 (depends on 1)

The method of claim 1, wherein the CDA mode switching includes a low-load CDA mode switching by the EV mode and a regenerative braking CDA mode switching by the regenerative braking mode.

### Claim 6 (depends on 5)

The method of claim 5, wherein the low-load CDA mode switching generates a positive (+) torque for the motor.

### Claim 7 (depends on 5)

The method of claim 5, wherein the regenerative braking CDA mode switching generates a negative (−) torque for the motor.

### Claim 8 (depends on 1)

The method of claim 1, wherein the CDA mode application supplies a hydraulic fluid for an operation of the variable valve control mechanism.

### Claim 9 (depends on 1)

The method of claim 1, wherein the CDA non-operation control is configured to drive the engine.

### Claim 10

An extended driving mode system of a hybrid vehicle, the extended driving mode system comprising:
a controller configured to perform cylinder deactivation (CDA) mode control to switch cylinders of an engine into deactivation through a variable valve control mechanism when an engine stop mode in which an engine power is not required is recognized, and to perform CDA non-operation control not to operate the variable valve control mechanism when the engine is stopped.

### Claim 11 (depends on 10)

The extended driving mode system of claim 10, wherein the variable valve control mechanism is a cylinder of an engine deactivation (CDA) device.

### Claim 12 (depends on 11)

The extended driving mode system of claim 11, wherein the CDA device is mounted for each of the cylinders of the engine.

### Claim 13 (depends on 11)

The extended driving mode system of claim 11, wherein the CDA device is operated by hydraulic fluid.

### Claim 14 (depends on 10)

The extended driving mode system of claim 10, wherein the engine includes a P0 system connected to a motor through a belt.

### Claim 15 (depends on 10)

The extended driving mode system of claim 10, wherein the engine includes a P1 system connected to a motor through a flywheel.