Control apparatus for hybrid vehicles

• US 20040135527A1
• Filed: 12/22/2003
• Published: 07/15/2004
• Est. Priority Date: 01/15/2003
• Status: Abandoned Application

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Yamamoto, Kazuhisa, Amanuma, Hirokatsu, Tatara, Yusuke
• Application Number:
  US10/740,498
• Publication Number:
  US 20040135527A1
• Time in Patent Office: Days
• US Class Current: 318/139
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 6/442 Series-parallel switching type
• CPC Class Codes: B60K 6/52 Driving a plurality of drive axles, e.g. four-wheel drive
• CPC Class Codes: B60K 6/543 the transmission being a continuously variable transmission
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/24 including control of energy storage means
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• 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 2300/18 Four-wheel drive vehicles
• CPC Class Codes: B60W 2510/242 for electrical energy
• CPC Class Codes: B60W 2510/244 Charge state
• CPC Class Codes: B60W 2520/26 Wheel slip
• CPC Class Codes: B60W 2710/08 Electric propulsion units
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility

Abstract

A road situation is estimated. If in a slipping state (a wheel slip flag F_SLIP=1) or if an output changing switch is turned on by the driver of a hybrid vehicle, a second motor is energized based on a 4WD-oriented rear motor drive power map to avoid the slip. At the same time, a first motor is driven to generate electric power based on a 4WD-mode front motor charging map, thereby energizing the second motor.

Claims

1. A control apparatus for controlling a hybrid vehicle having an engine for driving one of front and rear wheels, a first motor connected to said engine for driving one of said front and rear wheels and generating electric power, a second motor driving the other of said front and rear wheels and generating electric power, and a battery for storing electric power generated by said first motor and said second motor and supplying electric power to said first motor and said second motor, said control apparatus comprising:

a running state estimating unit for estimating a running state of the hybrid vehicle; and

an output changing unit for changing the output of said first motor and said second motor depending on said running state estimated by said running state estimating unit.

3. A control apparatus according to claim 1, wherein said output changing unit increases the output of said second motor when said running state estimating unit estimates said running state as a slipping state of one of said front and rear wheels.

4. A control apparatus according to claim 1, further comprising:

an amount-of-generated-electric-power changing unit for changing the amount of electric power generated by said first motor when the output of said second motor is changed by said output changing unit.

6. A control apparatus according to claim 4, further comprising:

a state of charge detector for detecting state of charge of said battery;

wherein said amount-of-generated-electric-power changing unit changes the amount of electric power generated by said first motor based on said state of charge when said output changing unit increases the output of said second motor.

8. A control apparatus according to claim 6, wherein said amount-of-generated-electric-power changing unit increases the amount of electric power generated by said first motor if said state of charge is equal to or smaller than a predetermined amount, and stops power generation by said first motor or does not change the amount of electric power generated by said first motor if said state of charge is greater than said predetermined amount.

2. A control apparatus for controlling a hybrid vehicle having an engine for driving one of front and rear wheels, a first motor connected to said engine for driving one of said front and rear wheels and generating electric power, a second motor driving the other of said front and rear wheels and generating electric power, and a battery for storing electric power generated by said first motor and said second motor and supplying electric power to said first motor and said second motor, said control apparatus comprising:

an output changing controller for making a control action to change the output of said second motor; and

an output changing unit for changing the output of said second motor depending on the control action made by said output changing controller.

5. A control apparatus according to claim 2, further comprising:

an amount-of-generated-electric-power changing unit for changing the amount of electric power generated by said first motor when the output of said second motor is changed by said output changing unit.

7. A control apparatus according to claim 5, further comprising:

a state of charge detector for detecting a state of charge of said battery;

wherein said amount-of-generated-electric-power changing unit changes the amount of electric power generated by said first motor based on said state of charge when said output changing unit increases the output of said second motor.

9. A control apparatus according to claim 7, wherein said amount-of-generated-electric-power changing unit increases the amount of electric power generated by said first motor if said state of charge is equal to or smaller than a predetermined amount, and stops power generation by said first motor or does not change the amount of electric power generated by said first motor if said state of charge is greater than said predetermined amount.