METHOD FOR CONTROLLING ENGINE TORQUE OF HYBRID ELECTRIC VEHICLE WITH ELECTRONIC THROTTLE CONTROL

• US 20080146411A1
• Filed: 11/15/2007
• Published: 06/19/2008
• Est. Priority Date: 12/15/2006
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Choi, Yong Kak
• Granted Patent: US 7,828,696 B2
• Time in Patent Office: Days
• US Class Current: 477/107
• CPC Class Codes: B60K 6/485 Motor-assist type
• CPC Class Codes: B60W 10/02 including control of driveline clutches
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/107 with endless flexible members
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 2710/0666 Engine torque
• CPC Class Codes: B60W 30/192 Mitigating problems related to power-up or power-down of the driveline, e.g. start-up of a cold engine
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y10S 903/946 Characterized by control of driveline clutch

Abstract

A method for controlling engine torque of a hybrid electric vehicle with an electronic throttle control when an engine is restarted after an idle-stop state includes: transmitting torque restriction information to an engine control unit, outputting a restricted torque from the engine control unit using the torque restriction information, transmitting an input torque of the engine to a continuously variable transmission by a clutch operation according to a control of the engine control unit, and supplying a clutch control hydraulic pressure based on the input torque.

Claims

1. A method for controlling engine torque of a hybrid electric vehicle with an electronic throttle control when an engine is restarted after an idle-stop state, the method comprising:

transmitting torque restriction information to an engine control unit;

outputting a restricted torque from the engine control unit using the torque restriction information;

transmitting an input torque of the engine to a continuously variable transmission by a clutch operation according to a control of the engine control unit; and

supplying a clutch control hydraulic pressure based on the input torque.

2. The method of claim 1, wherein the torque restriction information is based on engine coolant temperature.

3. The method of claim 1, wherein the torque restriction information is transmitted until a clutch operates.

4. The method of claim 3, wherein, if the clutch does not operate, the torque restriction is released after a predetermined time.