# US 2014/0207323 A1 · Control device

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- Number: US 2014/0207323 A1
- Document ID: US20140207323A1
- Status: Published application
- Kind: A1
- Application number: 14/239,985
- Filed: 2012-11-22
- Published: 2014-07-24
- Earliest claimed: 2011-11-22
- Assignees: Aisin Aw Co., Ltd.
- Applicants: Aisin Aw Co. Ltd.
- Inventors: Takashi Yoshida; Yomei Hakumura; Yoichi Tajima; Kohei Tsuda
- Web page: https://patentgrep.com/patent/US20140207323A1

## CPC

- 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)}
- B60K 6/48: Parallel type
- B60L 15/20: for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
- B60L 50/16: with provision for separate direct mechanical propulsion
- B60W 10/02: including control of driveline clutches
- B60W 10/06: including control of combustion engines
- B60L 2240/12: Speed
- B60L 2240/421: Speed
- B60L 2240/423: Torque
- B60L 2240/441: Speed
- B60L 2240/443: Torque
- B60L 2240/486: Operating parameters
- B60L 2240/507: Operating parameters
- B60L 2260/44: by parameter estimation
- B60L 2270/145: Structure borne vibrations
- B60W 2710/081: Speed
- Y02T 10/62: Hybrid vehicles
- Y02T 10/64: Electric machine technologies in electromobility
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
- Y02T 10/72: Electric energy management in electromobility
- Y10S 903/93: Conjoint control of different elements
- 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
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- 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 that that performs starting control for an internal combustion engine. A first transition control during which a first engagement device is caused to transition from a disengaged state to a slipping engagement state is started after the starting request for the internal combustion engine is made. A rotational speed control in which the rotary electric machine is controlled such that a rotational speed of the rotary electric machine becomes a target rotational speed is started before the first engagement device transitions from the disengaged state to the slipping engagement state. A rotational speed control is terminated and torque control in which the rotary electric machine is controlled after the first engagement device transitions from the disengaged to the slipping engagement state, and the second engagement device is caused to transition from a direct engagement state to a slipping engagement state after the torque control is started.

## Claims

### Claim 1

A control device that controls a vehicle drive device in which a rotary electric machine is provided in a power transfer path that connects between an internal combustion engine and wheels and in which a first engagement device is provided between the internal combustion engine and the rotary electric machine and a second engagement device is provided between the rotary electric machine and the wheels, wherein
in performing starting control for the internal combustion engine in which a rotational speed of the internal combustion engine is raised using a rotational drive force of the rotary electric machine in the case where a starting request for the internal combustion engine is made with the first engagement device in a disengaged state and with the second engagement device in a direct engagement state,
first transition control in which the first engagement device is caused to transition from the disengaged state to a slipping engagement state is started after the starting request for the internal combustion engine is made, rotational speed control in which the rotary electric machine is controlled such that a rotational speed of the rotary electric machine becomes a target rotational speed is started before the first engagement device transitions from the disengaged state to the slipping engagement state, the rotational speed control is terminated and torque control in which the rotary electric machine is controlled such that output torque of the rotary electric machine becomes target torque is started after the first engagement device transitions from the disengaged state to the slipping engagement state, and the second engagement device is caused to transition from a direct engagement state to a slipping engagement state after the torque control is started.

### Claim 2 (depends on 1)

The control device according to claim 1, wherein
the first engagement device is caused to transition from the slipping engagement state to a direct engagement state after the second engagement device transitions from the direct engagement state to the slipping engagement state.

### Claim 3 (depends on 1)

The control device according to claim 1, wherein
second transition control in which the second engagement device is caused to transition from the direct engagement state to the slipping engagement state is started after the torque control is started.

### Claim 4 (depends on 1)

The control device according to claim 1, wherein:
the disengaged state of the first engagement device is a state in which the first engagement device is not producing a transfer torque capacity;
the slipping engagement state of the first engagement device is a state in which there is a difference between the rotational speed of the internal combustion engine and the rotational speed of the rotary electric machine with the first engagement device producing a transfer torque capacity;
the direct engagement state of the first engagement device is a state in which there is no difference between the rotational speed of the internal combustion engine and the rotational speed of the rotary electric machine with the first engagement device producing a transfer torque capacity;
the slipping engagement state of the second engagement device is a state in which there is a difference between rotational speeds of two engagement members of the second engagement device with the second engagement device producing a transfer torque capacity; and
the direct engagement state of the second engagement device is a state in which there is no difference between the rotational speeds of the two engagement members of the second engagement device with the second engagement device producing a transfer torque capacity.

### Claim 5 (depends on 4)

The control device according to claim 4, wherein:
the first transition control is started by providing the first engagement device with a command to produce a transfer torque capacity; and
the second transition control in which the second engagement device is caused to transition from the direct engagement state to the slipping engagement state is started by providing a command to gradually reduce the transfer torque capacity produced by the second engagement device until there is a difference between the rotational speeds of the two engagement members of the second engagement device.

### Claim 6 (depends on 1)

The control device according to claim 1, wherein
after the second engagement device transitions from the direct engagement state to the slipping engagement state, the torque control is terminated, and slipping rotational speed control in which the output torque of the rotary electric machine is controlled so as to bring the rotational speed of the rotary electric machine closer to the target rotational speed which is higher than the rotational speed of the rotary electric machine for a case where the second engagement device is in the direct engagement state is started.

### Claim 7 (depends on 1)

The control device according to claim 1, wherein
the second transition control in which the second engagement device is caused to transition from the direct engagement state to the slipping engagement state is started after transfer torque information that is information indicating that the transfer torque capacity of the first engagement device has become equal to or more than a predetermined value is detected.

### Claim 8 (depends on 7)

The control device according to claim 7, wherein
information indicating that the rotational speed of the internal combustion engine has become equal to or more than a predetermined rotational speed is used as the transfer torque information.

### Claim 9 (depends on 1)

The control device according to claim 1, wherein
the rotational speed control includes:
estimating transfer path input torque that is torque input to the power transfer path on the basis of variations in rotational speed of the rotary electric machine;
estimating external input torque input from the wheels to the power transfer path by subtracting at least the output torque of the rotary electric machine from the transfer path input torque; and
calculating the target rotational speed on the basis of the external input torque and vehicle required torque that is torque required to drive the wheels.

### Claim 10 (depends on 1)

The control device according to claim 1, wherein
it is determined that the second engagement device has transitioned from the direct engagement state to the slipping engagement state on the basis of a fact that the rotational speed difference across the second engagement device has become equal to or more than a predetermined value.