# US 10,502,123 B2 · Control device for vehicle, and control method for vehicle

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- Number: US 10,502,123 B2
- Document ID: US10502123B2
- Status: Granted
- Kind: B2
- Application number: 15/384,318
- Filed: 2016-12-20
- Published: 2017-08-03
- Granted: 2019-12-10
- Earliest claimed: 2016-01-28
- Assignees: Honda Motor Co., Ltd.
- Applicants: Honda Motor Co., Ltd.
- Inventors: Shintaro Mito; Masahiro Takeuchi; Atsushi Kurauchi
- Web page: https://patentgrep.com/patent/US10502123B2

## CPC

- F02B 37/183: {Arrangements of bypass valves or actuators therefor}
- B60K 6/20: the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K 6/445: Differential gearing distribution type
- B60W 20/17: for noise reduction
- 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)}
- F02B 33/34: with rotary pumps (with cell-type pressure exchangers or the like F02B33/42)
- F02D 41/0007: {for control of turbo-charged or super-charged engines (control of the pumps per se F02B37/12)}
- F02D 41/042: {for stopping the engine}
- F02D 41/065: {at hot start or restart (F02D41/067 takes precedence)}
- B60W 2510/0633: Turbocharger state
- B60W 2710/0638: Turbocharger state
- B60W 2710/08: Electric propulsion units
- B60Y 2400/435: Supercharger or turbochargers
- F02N 11/0814: {comprising means for controlling automatic idle-start-stop}
- Y02T 10/12: Improving ICE efficiencies
- Y02T 10/62: Hybrid vehicles
- Y10S 903/93: Conjoint control of different elements
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- 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
- 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)
- B60Y: INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- F02N: STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A control device for a vehicle includes an opening degree sensor to detect an opening degree of a wastegate valve disposed in a bypass passage bypassing a turbine. Circuitry is configured to stop an internal combustion engine while the vehicle is driven by a motor in a motor drive mode. The circuitry is configured to calculate a target opening degree of the wastegate valve to be larger than a maximum error between the opening degree detected by the opening degree sensor and an actual opening degree of the wastegate valve. The circuitry is configured to control the wastegate valve such that the opening degree detected by the opening degree sensor is equal to the target opening degree while the vehicle is driven in the motor drive mode.

## Claims

### Claim 1

A control device for a vehicle including an internal combustion engine and a motor as drive sources, the internal combustion engine including a turbocharger and a wastegate valve, the turbocharger including a turbine disposed in an exhaust passage and a compressor driven by the turbine to rotate and pressurize air to be sucked by the internal combustion engine, the wastegate valve being disposed in a bypass passage that bypasses the turbine, the vehicle having a motor drive mode in which the vehicle runs by using the motor alone as the drive source, the control device comprising:
a temporarily stopping unit that automatically stops the internal combustion engine while the vehicle is running in the motor drive mode;
an opening degree detector that detects an opening degree of the wastegate valve; and
a valve controller that sets a target opening degree of the wastegate valve to a predetermined opening degree in the motor drive mode and controls the wastegate valve to make the opening degree detected by the opening degree detector equal to the target opening degree,
wherein the predetermined opening degree is set such that a non-contact condition is satisfied, the non-contact condition being a condition in which an actual opening degree of the wastegate valve does not become smaller than or equal to a fully-closed-state opening degree when an error between the detected opening degree and the actual opening degree becomes equal to an expected maximum value, the actual opening degree being estimated using a reference opening degree value measured using the opening degree detector at a predetermined operating time when the wastegate valve is at a fully-closed-state opening degree.

### Claim 2 (depends on 1)

The control device according to claim 1, wherein the non-contact condition is a condition in which the predetermined opening degree is greater than or equal to a threshold obtained by adding the expected maximum value of the error to the fully-closed-state opening degree, and
wherein the predetermined opening degree is set to the threshold that is a minimum opening degree that satisfies the non-contact condition.

### Claim 3 (depends on 1)

The control device according to claim 1, wherein the error includes an error due to temperature-change-induced expansion and contraction of components of a motor that drives the wastegate valve and an error induced by a relative displacement of the components of the motor.

### Claim 4 (depends on 1)

The control device according to claim 1, wherein in a case where the motor drive mode is ended and the internal combustion engine is restarted, the valve controller sets the target opening degree to the fully-closed-state opening degree before the internal combustion engine is restarted and then the restart of the internal combustion engine and an operation for closing the wastegate valve are performed in parallel.

### Claim 5

A control device for a vehicle including both of an internal combustion engine and a motor to drive the vehicle and a turbocharger having a turbine disposed in an exhaust passage, comprising:
an opening degree sensor to detect an opening degree of a wastegate valve disposed in a bypass passage bypassing the turbine; and
circuitry configured to:
stop the internal combustion engine while the vehicle is driven by the motor in a motor drive mode;
calculate a target opening degree of the wastegate valve to be larger than a maximum error between the opening degree detected by the opening degree sensor and an actual opening degree of the wastegate valve, the actual opening degree being estimated using a reference opening degree value measured using the opening degree sensor at a predetermined operating time when the wastegate valve is at a fully-closed-state opening degree; and
control the wastegate valve such that the opening degree detected by the opening degree sensor is equal to the target opening degree while the vehicle is driven in the motor drive mode.

### Claim 6 (depends on 5)

The control device according to claim 5, wherein the target opening degree is greater than or equal to a threshold obtained from the maximum error, and
wherein the target opening degree is set to the threshold.

### Claim 7 (depends on 5)

The control device according to claim 5, wherein the maximum error is obtained from an error due to temperature-change-induced expansion and contraction of components of a motor to drive the wastegate valve and an error induced by a relative displacement of the components of the motor.

### Claim 8 (depends on 1)

The control device according to claim 1, wherein in a case where the internal combustion engine is restarted, the circuitry controls the wastegate valve to set the target opening degree to the zero degree before the internal combustion engine is restarted and then the restart of the internal combustion engine and an operation for closing the wastegate valve are performed in parallel.

### Claim 9 (depends on 5)

The control device according to claim 5, wherein the turbocharger includes a compressor driven by the turbine to rotate and pressurize air to be sucked by the internal combustion engine.

### Claim 10

A control method for a vehicle including both of an internal combustion engine and a motor to drive the vehicle and a turbocharger having a turbine disposed in an exhaust passage, comprising:
detecting an opening degree of a wastegate valve disposed in a bypass passage bypassing the turbine;
stopping the internal combustion engine while the vehicle is driven by the motor in a motor drive mode;
calculating a target opening degree of the wastegate valve to be larger than a maximum error between the detected opening degree and an actual opening degree of the wastegate valve, the actual opening degree being estimated using a reference opening degree value measured using the opening degree detector at a predetermined operating time when the wastegate valve is at a fully-closed-state opening degree; and
controlling the wastegate valve such that the detected opening degree is equal to the target opening degree while the vehicle is driven in the motor mode.