# US 10,246,079 B2 · Hybrid vehicle

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- Number: US 10,246,079 B2
- Document ID: US10246079B2
- Status: Granted
- Kind: B2
- Application number: 15/823,859
- Filed: 2017-11-28
- Published: 2018-05-31
- Granted: 2019-04-02
- Earliest claimed: 2016-11-29
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Hideki Kamatani; Koji Hokoi
- Web page: https://patentgrep.com/patent/US10246079B2

## CPC

- B60W 20/16: for reducing engine exhaust emissions
- B60K 6/445: Differential gearing distribution type
- B60W 10/06: including control of combustion engines
- B60W 10/08: including control of electric propulsion units, e.g. motors or generators
- B60W 10/184: with wheel brakes
- B60W 10/30: including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
- F02D 7/00: Other fuel-injection control
- F02D 41/0235: {in relation with the state of the exhaust gas treating apparatus (control of exhaust gas treating apparatus per se F01N)}
- F02D 41/123: {the fuel injection being cut-off}
- B60W 30/18109: {Braking}
- B60W 2050/0001: {Details of the control system}
- B60W 2510/0676: Engine temperature
- B60W 2510/068: Engine exhaust temperature
- B60W 2710/0627: Fuel flow rate
- F02D 2200/021: Engine temperature
- F02D 2200/0802: Temperature of the exhaust gas treatment apparatus
- Y02T 10/62: Hybrid vehicles
- Y02T 10/72: Electric energy management in electromobility
- 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
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN 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)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A hybrid vehicle comprises an engine configured to output power for driving and equipped with an exhaust emission control device in an exhaust system thereof. The hybrid vehicle further comprises a control device. In response to a predetermined rotation request for rotating the engine with no need to output power from the engine, the control device performs a control to rotate the engine with fuel injection when a catalyst temperature in the exhaust emission control device is equal to or higher than a predetermined temperature, while performing a control to rotate the engine without the fuel injection when the catalyst temperature is lower than the predetermined temperature.

## Claims

### Claim 1

A hybrid vehicle, comprising:
an engine configured to output power for driving and equipped with an exhaust emission control device in an exhaust system thereof;
a first motor configured to motor the engine;
a second motor configured to output power for driving;
a power storage device configured to transmit electric power to and from the first motor and the second motor; and
a control device configured to control the engine, the first motor and the second motor, wherein
in response to a predetermined rotation request for rotating the engine with no need to output power from the engine,
when a catalyst temperature in the exhaust emission control device is equal to or higher than a predetermined temperature, the control device performs a first control that controls the engine and the first motor to rotate the engine with fuel injection, and
when the catalyst temperature is lower than the predetermined temperature, the control device performs a second control that controls the engine and the first motor to rotate the engine without the fuel injection.

### Claim 2 (depends on 1)

The hybrid vehicle according to claim 1,
wherein the predetermined rotation request comprises a request for rotating the engine to apply engine braking.

### Claim 3 (depends on 1)

The hybrid vehicle according to claim 1,
wherein the predetermined rotation request comprises a request for rotating the engine to drive a mechanical pump that is driven by rotation of an output shaft of the engine.

### Claim 4 (depends on 1)

The hybrid vehicle according to claim 1,
wherein the control device causes the engine to be motored using a larger torque in the second control, compared with a torque used in the first control.

### Claim 5 (depends on 1)

The hybrid vehicle according to claim 1,
wherein the catalyst temperature is either a detected value from a temperature sensor mounted to the exhaust emission control device or an estimated value that is estimated from a cooling water temperature of the engine.