# US 2021/0276536 A1 · Vehicle

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- Number: US 2021/0276536 A1
- Document ID: US20210276536A1
- Status: Published application
- Kind: A1
- Application number: 17/193,543
- Filed: 2021-03-05
- Published: 2021-09-09
- Earliest claimed: 2020-03-06
- Assignees: Honda Motor Co., Ltd.
- Applicants: Honda Motor Co., Ltd.
- Inventors: Yuto OTSUKI; Satoshi ANDO; Keiichi OHISO
- Web page: https://patentgrep.com/patent/US20210276536A1

## CPC

- B60K 6/52: Driving a plurality of drive axles, e.g. four-wheel drive
- B60W 20/15: Control strategies specially adapted for achieving a particular effect
- B60K 6/448: Electrical distribution type
- B60K 6/48: Parallel type
- B60W 10/06: including control of combustion engines
- B60W 10/08: including control of electric propulsion units, e.g. motors or generators
- B60W 20/10: Controlling the power contribution of each of the prime movers to meet required power demand
- B60W 30/02: Control of vehicle driving stability
- B60W 2520/10: Longitudinal speed
- B60W 2540/10: Accelerator pedal position
- B60W 2720/403: between front and rear axle
- Y02T 10/62: Hybrid vehicles
- 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 vehicle includes a main drive unit, a sub drive unit, and a control unit. The control unit includes a driving force distribution ratio setting unit and is configured to control the main drive unit and the sub drive unit. A drive mode of the main drive unit includes an electric power drive mode and an engine drive mode. The driving force distribution ratio setting unit is configured to set the driving force distribution ratio based on a vehicle speed, a required driving force, and the drive mode. When the drive mode is the engine drive mode, the driving force distribution ratio setting unit is configured to set the driving force distribution ratio so that a distribution ratio of the main driving force is 90% or more.

## Claims

### Claim 1

A vehicle comprising:
a main drive unit configured to output a main driving force for driving one of a front wheel and a rear wheel;
a sub drive unit configured to output a sub driving force for driving the other of the front wheel and the rear wheel; and
a control unit configured to control the main drive unit and the sub drive unit, wherein:
the main drive unit includes an internal combustion engine and at least one main drive rotary electric machine;
the sub drive unit includes at least one sub drive rotary electric machine;
the control unit includes a driving force distribution ratio setting unit configured to set a driving force distribution ratio between the main driving force and the sub driving force and is configured to control the main drive unit and the sub drive unit so that the main driving force and the sub driving force have the driving force distribution ratio set by the driving force distribution ratio setting unit;
a drive mode of the main drive unit includes an electric power drive mode, in which a driving force of the main drive rotary electric machine is output as the main driving force, and an engine drive mode, in which a driving force of the internal combustion engine is output as the main driving force;
the driving force distribution ratio setting unit is configured to set the driving force distribution ratio based on a vehicle speed of the vehicle, a required driving force of the vehicle, and the drive mode of the main drive unit; and
when the drive mode of the main drive unit is the engine drive mode, the driving force distribution ratio setting unit is configured to set the driving force distribution ratio so that a distribution ratio of the main driving force is 90% or more.

### Claim 2 (depends on 1)

The vehicle according to claim 1, wherein
the driving farce distribution ratio setting unit is configured to determine the driving force distribution ratio so that a distribution ratio of the sub driving force becomes zero when the drive mode of the main drive unit is the engine drive mode.

### Claim 3 (depends on 1)

The vehicle according to claim 1, wherein
the driving force distribution ratio setting unit is configured to determine the driving force distribution ratio so that a ratio of the main driving force is 50% or more.