Apparatus for controlling vehicle driving force

• US 20030034192A1
• Filed: 09/26/2002
• Published: 02/20/2003
• Est. Priority Date: 09/30/1998
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Iwaki, Hidefumi, Yoshida, Yoshiyuki, Takano, Yoshiya
• Application Number:
  US10/254,920
• Publication Number:
  US 20030034192A1
• Time in Patent Office: Days
• US Class Current: 180/197
• CPC Class Codes: B60K 28/16 responsive to, or preventing, skidding of wheels brake control systems for vehicle drive stability B60T8/1755; arrangements responsive to a speed condition for adjusting wheel braking force B60T8/32; control of vehicle driving stability otherwise than by controlling the propulsion unit only B60W30/02; preventing wheel slippage by reducing power in rail vehicles B61C15/00
• CPC Class Codes: B60W 2510/0676 Engine temperature
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2520/14 Yaw
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/18 Steering angle
• CPC Class Codes: B60W 2555/20 Ambient conditions, e.g. wind or rain
• CPC Class Codes: F02D 41/021 Introducing corrections for particular conditions exterior to the engine conjoint control of vehicle sub-units for propelling the vehicle B60W30/18

Abstract

The apparatus for controlling vehicle driving force is provided with a target driving force deciding part for deciding a target driving force by using an accelerator opening and vehicle speed, and driving force distribution control part for distributing the target driving force to an engine torque control part and a drive system control part. Further, this apparatus has a vehicle running state determining part for detecting the running state of the vehicle. Furthermore, the final target driving force is increased or decreased to correct based on the result of the vehicle running state determining part in the target driving force deciding part or the driving force distribution control part.

Claims

1. apparatus for controlling vehicle driving force comprising a target driving force deciding part for deciding a target driving force by using an accelerator opening and vehicle speed, and driving force distribution control part for distributing the target driving force to an engine torque control part and a drive system control part,

further comprising a vehicle running state determining part for detecting the running state of the vehicle,

wherein the result from said vehicle running state determining part is reflected to the correction control of the target driving force in said target driving force deciding part or the target driving force in said driving force distribution control part.

2. The apparatus for controlling vehicle driving force according to claim 1, wherein said correction control acts on said target driving force in a direction where said target driving force is increased or decreased when a special state is detected by said vehicle running state determining part, after avoiding the special state continues for a predetermined period of time, and is switched after transition time at the transition from or to the normal driving force.

3. The apparatus for controlling vehicle driving force according to claim 1, wherein said target driving force deciding part separately decides a target driving force used when a special state is detected by a vehicle running state determining part and the normal driving force, and interpolates both the target driving force at the switching of determination of the vehicle state.

4. The apparatus for controlling vehicle driving force according to any one of claims 1 to 3, wherein the state of steering change of the vehicle or the state of turn of the vehicle is determined by said vehicle running state determining part.

5. The apparatus for controlling vehicle driving force according to claim 4, wherein said turn of the vehicle is determined by using the signal of the yaw rate of the vehicle.

6. The apparatus for controlling vehicle driving force according to any one of claims 1 to 3, wherein the climbing state of the vehicle is determined by said vehicle running state determining part.

7. The apparatus for controlling vehicle driving force according to claim 1 or 2, wherein the ASCD end is determined by said vehicle running state determining part.

8. The apparatus for controlling vehicle driving force according to any one of claims 1 to 3, wherein the vehicle environment after start of the vehicle is determined by said vehicle running state determining part.

9. The apparatus for controlling vehicle driving force according to claim 8, wherein any one of the coolant temperature at start, the elapsed time after start, and the outside air temperature is used for the determination of vehicle environment.

10. The apparatus for controlling vehicle driving force according to any one of claims 1 to 3, wherein the wheel slip state is determined by said vehicle running state determining part.