# US 11,305,754 B2 · Control device of vehicle

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- Number: US 11,305,754 B2
- Document ID: US11305754B2
- Status: Granted
- Kind: B2
- Application number: 17/120,719
- Filed: 2020-12-14
- Published: 2021-06-24
- Granted: 2022-04-19
- Earliest claimed: 2019-12-20
- Assignees: Honda Motor Co., Ltd.
- Applicants: Honda Motor Co., Ltd.
- Inventors: Mamiko Inoue; Kentaro Shiraki; Tatsuya Ishikawa
- Web page: https://patentgrep.com/patent/US11305754B2

## CPC

- B60K 6/445: Differential gearing distribution type
- B60W 20/40: Controlling the engagement or disengagement of prime movers, e.g. for transition between prime movers {(power-up or power-down of the driveline B60W30/192)}
- B60W 10/06: including control of combustion engines
- B60W 20/17: for noise reduction
- B60W 20/20: Control strategies involving selection of hybrid configuration, e.g. selection between series or parallel configuration
- B60W 30/1884: {Avoiding stall or overspeed of the engine}
- B60W 10/08: including control of electric propulsion units, e.g. motors or generators
- B60W 2050/0096: {Control during transition between modes}
- B60W 2510/0638: Engine speed
- B60W 2520/10: Longitudinal speed
- B60W 2710/0644: Engine speed
- Y02T 10/62: Hybrid vehicles
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/72: Electric energy management in electromobility
- 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
- 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 control device of a vehicle includes: a travel mode control unit configured to set, based on a traveling state of the vehicle, any travel mode among a plurality of travel modes; and a predicted rotation speed acquisition unit configured to acquire, when a transition condition to a second travel mode is satisfied based on the traveling state of the vehicle that is travelling in a first travel mode, a predicted rotation speed of the internal combustion engine when the travel mode is shifted to the second travel mode at a time when the transition condition is satisfied. The travel mode control unit includes a transition prohibition setting unit configured to prohibit transition to the second travel mode when a difference between a rotation speed of the internal combustion engine when the transition condition is satisfied and the predicted rotation speed is equal to or larger than a threshold value.

## Claims

### Claim 1

A control device of a vehicle configured to travel in a plurality of travel modes including:
a first travel mode in which in response to supply of electric power generated by a generator, power output by an electric motor is transmitted to a driving wheel to drive the vehicle, the generator generating the electric power by using power of an internal combustion engine, and
a second travel mode in which power of the internal combustion engine is transmitted to the driving wheel to drive the vehicle, the control device comprising:
a travel mode control unit configured to set, based on a traveling state of the vehicle, any travel mode among the plurality of travel modes as a travel mode in which the vehicle travels; and
a predicted rotation speed acquisition unit configured to acquire, when a transition condition to the second travel mode is satisfied based on the traveling state of the vehicle that is travelling in the first travel mode, a predicted rotation speed of the internal combustion engine when the travel mode is shifted to the second travel mode at a time when the transition condition is satisfied, wherein
the travel mode control unit includes a transition prohibition setting unit configured to determine whether a difference between a rotation speed of the internal combustion engine when the transition condition is satisfied and the predicted rotation speed acquired by the predicted rotation speed acquisition unit is equal to or larger than a threshold value and prohibit transition to the second travel mode when it is determined that the difference is equal to or larger than the threshold value,
when the difference between the rotation speed of the internal combustion engine at a time when the transition condition is satisfied and the predicted rotation speed at a time when the transition condition is satisfied is smaller than the threshold value, the travel mode control unit shifts the travel mode to the second travel mode at a time when the transition condition is satisfied, and
the travel mode control unit, the predicted rotation speed acquisition unit, and the transition prohibition setting unit are each implemented via at least one processor.

### Claim 2 (depends on 1)

The control device of a vehicle according to claim 1, wherein
the predicted rotation speed acquisition unit further acquires a predicted rotation speed of the internal combustion engine when the travel mode is shifted to the second travel mode at a time when the transition prohibition setting unit prohibits the transition to the second travel mode, and
the transition prohibition setting unit releases the prohibition of transition to the second travel mode when a difference between a rotation speed of the internal combustion engine at a time when the transition to the second travel mode is prohibited and the predicted rotation speed when the travel mode is shifted to the second travel mode at a time when the transition to the second travel mode is prohibited is smaller than the threshold value.

### Claim 3 (depends on 2)

The control device of a vehicle according to claim 2, wherein
in a case where the transition condition to the second travel mode is satisfied at a time when the transition to the second travel mode is prohibited, the travel mode control unit shifts the travel mode to the second travel mode when the prohibition of transition to the second travel mode is released.

### Claim 4 (depends on 1)

The control device of a vehicle according to claim 1 further comprising:
an internal combustion engine control unit configured to control the internal combustion engine, wherein
when the vehicle is traveling in the first travel mode, the internal combustion engine control unit increases a rotation speed of the internal combustion engine to a first rotation speed as the vehicle speed increases and reduces the rotation speed of the internal combustion engine to a second rotation speed smaller than the first rotation speed when the rotation speed of the internal combustion engine reaches the first rotation speed, and
the internal combustion engine control unit is implemented via at least one processor.