# US 9,434,371 B2 · Control device of hybrid vehicle

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- Number: US 9,434,371 B2
- Document ID: US9434371B2
- Status: Granted
- Kind: B2
- Application number: 13/617,592
- Filed: 2012-09-14
- Published: 2013-03-28
- Granted: 2016-09-06
- Earliest claimed: 2011-09-22
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Koichiro Muta; Michio Nakamura
- Inventors: Koichiro Muta; Michio Nakamura
- Web page: https://patentgrep.com/patent/US9434371B2

## CPC

- B60W 20/15: Control strategies specially adapted for achieving a particular effect
- 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 20/17: for noise reduction
- B60W 30/18054: {at stand still, e.g. engine in idling state (hill holding B60W30/18118)}
- B60W 30/1882: {characterised by the working point of the engine, e.g. by using engine output chart}
- B60W 2510/188: Parking lock mechanisms
- B60W 2710/083: Torque
- Y02T 10/62: Hybrid 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
- 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
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

An operation line is set on the basis of a shift position and a brake pedal position, from among a plurality of operation lines in which a degree of avoidance of an abnormal noise generation region from a fuel-economy optimal operation line becomes smaller as a degree to which travel of the vehicle is restricted becomes greater. An engine and a motor are controlled by setting a target operation point of the engine using the set operation line, and by setting a torque instruction of the motor.

## Claims

### Claim 1

A control device of a hybrid vehicle, comprising:
an internal combustion engine;
a power generator capable of input and output of motive power;
a planetary gear mechanism in which three rotational elements are connected to three shafts, namely a drive shaft that is coupled to an axle, an output shaft of the internal combustion engine, and a rotating shaft of the power generator;
an electric motor that inputs and outputs motive power to/from the drive shaft; and
a control unit having a preset map stored therein, the preset map correlating revolutions and torque of the internal combustion engine, the preset map having a curve corresponding to a requested power required from the internal combustion engine, a predetermined fuel-economy optimal operation line, an abnormal noise generation region, and a plurality of operation lines,
the curve corresponding to the requested power is based on the revolutions and the torque,
the predetermined fuel-economy optimal operation line is a line correlating revolutions and the torque of the engine in which fuel economy of the internal combustion engine is optimal,
the abnormal noise generation region is a region of the preset map in which an abnormal noise is generated,
the plurality of operation lines are obtained by deviating, in a stepwise manner, from the fuel-economy optimal operation line in the abnormal noise generation region,
the control unit that operates the internal combustion engine using target revolutions and target torque of the internal combustion engine determined on the basis of an intersection between the curve corresponding to the requested power and any of the plurality of operation lines, one of the plurality of operation lines is selected based on a degree to which travel of the vehicle is restricted such that as the degree to which travel of the vehicle is restricted increases a degree of avoidance of the operation line from the fuel-economy optimal operation line decreases.

### Claim 2 (depends on 1)

The control device of a hybrid vehicle according to claim 1, wherein
the control unit performs control using an operation line in which the degree of avoidance from the fuel-economy optimal operation line in the abnormal noise generation region is smaller when a parking lock is on than when the parking lock is off.

### Claim 3 (depends on 1)

The control device of a hybrid vehicle according to claim 1, wherein
the control unit performs control using an operation line in which the degree of avoidance from the fuel-economy optimal operation line in the abnormal noise generation region is smaller when a brake is on than when the brake is off.

### Claim 4 (depends on 1)

The control device of a hybrid vehicle according to claim 1, wherein
the control unit performs control using an operation line in which the degree of avoidance from the fuel-economy optimal operation line in the abnormal noise generation region is smaller at a shift position for a low vehicle speed range than at a shift position for a high vehicle speed range.

### Claim 5 (depends on 1)

The control device of a hybrid vehicle according to claim 1, wherein
the control unit controls the internal combustion engine using, from among the plurality of operation lines, an operation line in which the revolutions of the internal combustion engine become lower and the torque of the internal combustion engine becomes higher at the intersection between the curve corresponding to the request power and each of the plurality of operation lines as the degree to which travel of the vehicle is restricted becomes greater.

### Claim 6 (depends on 1)

The control device of a hybrid vehicle according to claim 1, wherein the operation line in which the degree of avoidance from the fuel-economy optimal operation line that decreases, from among the plurality of operation lines, is an operation line in which the revolutions of the internal combustion engine become lower and the torque of the internal combustion engine becomes higher at the intersection between the curve corresponding to the request power and each of the plurality of operation lines.