Vehicle control system

• US 8,793,044 B2
• Filed: 12/21/2012
• Issued: 07/29/2014
• Est. Priority Date: 12/22/2011
• Status: Active Grant

• Current Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Aisin Seiki Co., Ltd. (Aisin Corp.), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Miyamoto, Tomohiko, Nagata, Kenjiro
• Primary Examiner(s): Trammell, James
• Assistant Examiner(s): SMITH-STEWART, DEMETRA R
• Application Number:
  US13/723,788
• Publication Number:
  US 20130166126A1
• Time in Patent Office: 585 Days
• Field of Search: None
• US Class Current: 701/22
• CPC Class Codes: B60K 2001/006 the electric motors
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/30 including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: F16H 61/0031 using auxiliary pumps, e.g. pump driven by a different power source than the engine
• CPC Class Codes: F16H 61/30 Hydraulic or pneumatic motors or related fluid control means therefor
• CPC Class Codes: F16H 63/3023 the final output mechanisms comprising elements moved by fluid pressure band brake actuating mechanisms F16H63/3003
• CPC Class Codes: Y10S 903/902 Prime movers comprising electrical and internal combustion motors

Abstract

A vehicle control system includes: a power unit including an engine and a rotating electrical machine; a power supply apparatus connected to the rotating electrical machine; an oil pump unit including a mechanical oil pump and an electric oil pump for cooling the rotating electrical machine; and a control apparatus. The control apparatus is constituted by an EOP idling determination unit that determines an idling state of the electric oil pump, and an engine starting processing unit that performs processing to drive the mechanical oil pump by starting the engine in accordance with the determination of the EOP idling determination unit.

Claims

1. A vehicle control system comprising

a power unit including an internal combustion engine and a rotating electrical machine;

an oil pump unit including an electric oil pump and a mechanical oil pump that is driven by the internal combustion engine, the oil pump unit cooling the rotating electrical machine; and

a control apparatus that drives the mechanical oil pump, by starting the internal combustion engine, when the electric oil pump is in an idling state in which the electric oil pump fails to deliver a coolant at a predetermined flow rate and when a parameter related to an operating state of the electric oil pump exceeds a predetermined determination reference, the control apparatus limits an output of the rotating electrical machine in accordance with a degree by which the parameter related to the operating state of the electric oil pump exceeds the predetermined determination reference.

2. The vehicle control system according to claim 1, wherein the control apparatus starts the internal combustion engine when a required output of a vehicle is not satisfied by the limited output of the rotating electrical machine.

3. The vehicle control system according to claim 1, wherein the control apparatus starts the internal combustion engine by switching an operating mode of the power unit from an EV operating mode in which the rotating electrical machine is operated without operating the internal combustion engine to an HV operating mode in which both the internal combustion engine and the rotating electrical machine can be operated.

4. A vehicle control system comprising:

a power unit including an internal combustion engine and a rotating electrical machine;

an oil pump unit including an electric oil pump and a mechanical oil pump that is driven by the internal combustion engine, the oil pump unit cooling the rotating electrical machine; and

a control apparatus that drives the mechanical oil pump, by starting the internal combustion engine, when the electric oil pump is in an idling state in which the electric oil pump fails to deliver a coolant at a predetermined flow rate and when a parameter related to an operating state of the electric oil pump exceeds a predetermined determination reference set on the basis of a frequency with which idling occurs in the electric oil pump.

5. The vehicle control system according to claim 4, wherein the control apparatus starts the internal combustion engine by switching an operating mode of the power unit from an EV operating mode in which the rotating electrical machine is operated without operating the internal combustion engine to an HV operating mode in which both the internal combustion engine and the rotating electrical machine can be operated.

6. A vehicle control system comprising:

a power unit including an internal combustion engine and a rotating electrical machine;

an oil pump unit including an electric oil pump and a mechanical oil pump that is driven by the internal combustion engine, the oil pump unit cooling the rotating electrical machine; and

a control apparatus that drives the mechanical oil pump, by starting the internal combustion engine, when the electric oil pump is in an idling state in which the electric oil pump fails to deliver a coolant at a predetermined flow rate and when a parameter related to an operating state of the electric oil pump exceeds a predetermined determination reference set on the basis of a period of idling in the electric oil pump.

7. The vehicle control system according to claim 6, wherein the control apparatus starts the internal combustion engine by switching an operating mode of the power unit from an EV operating mode in which the rotating electrical machine is operated without operating the internal combustion engine to an HV operating mode in which both the internal combustion engine and the rotating electrical machine can be operated.