Vehicle stability control system

• US 7,783,402 B2
• Filed: 08/11/2005
• Issued: 08/24/2010
• Est. Priority Date: 08/20/2004
• Status: Expired due to Fees

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Tashiro, Tsutomu, Fujiii, Takehito, Sawada, Mamoru, Matsumoto, Toshiki
• Primary Examiner(s): Tran; Khoi
• Assistant Examiner(s): Sriraman; Nikhil
• Application Number:
  US11/201,489
• Publication Number:
  US 20060041353A1
• Time in Patent Office: 1,839 Days
• Field of Search: 701/70, 701/94, 701/38, 701/42, 701/69, 701/111, 180/65.1, 180/65.21, 180/65.28, 180/65.285, 180/65.31, 280/5.513
• US Class Current: 701/38
• CPC Class Codes: B60G 2400/0512 Pitch angle
• CPC Class Codes: B60G 2400/0532 Pitch acceleration
• CPC Class Codes: B60G 2800/014 Pitch; Nose dive
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 2030/041 about the pitch axis
• CPC Class Codes: B60W 2040/1338 about the pitch axis
• CPC Class Codes: B60W 40/11 Pitch movement
• CPC Class Codes: B60W 40/112 Roll movement
• CPC Class Codes: B60W 40/114 Yaw movement

Abstract

A vehicle stability control system uses a physical quantity corresponding to a driver accelerator input to control engine power produced by an engine and to controllably drive an engine load device for regulating the engine power to produce a desired drive force. The vehicle stability control system includes a vibration detector and a corrector. The vibration detector determines a vibration that occurs during running of the vehicle to disturb the stability of the vehicle. The corrector drives the engine load device to suppress the vibration in response to the vibration determined by the vibration detector.

Claims

1. A vehicle stability control system of a vehicle having a vehicle body, front and rear wheel suspensions that support the vehicle body, an accelerator and power regulating means for regulating engine power, thereby producing a desired vehicle drive force, the vehicle stability control system comprising:

body vibration detection means for detecting a pitching vibration of the vehicle body which occurs during running of the vehicle based on a vehicle body input torque from a quantity sensor; and

correction means configured to determine a correction physical quantity corresponding to the pitching vibration detected by the body vibration detection means, and control the power regulating means based at least on the correction physical quantity,

wherein the correction means determines a drive force proportion between the engine and the power regulating means based on operation of the accelerator, and corrects a physical quantity corresponding to the drive force proportion based on the correction physical quantity,

wherein the power regulating means is a motor generator, and

when the motor generator operates as a motor and the correction physical quantity is negative, the correction means subtracts an absolute value of the correction physical quantity from a physical quantity corresponding to a drive force increased by the motor generator, and

when the motor generator operates as a generator and the correction physical quantity is positive, the correction means subtracts an absolute value of the correction physical quantity from a physical quantity corresponding to a drive force reduced by the motor generator.

2. A vehicle stability control system of a vehicle having a vehicle body, front and rear wheel suspensions that support the vehicle body, an accelerator and power regulating means for regulating engine power, thereby producing a desired vehicle drive force, the vehicle stability control system comprising:

body vibration detection means for detecting a pitching vibration of the vehicle body which occurs during running of the vehicle based on a vehicle body input torque from a quantity sensor; and

correction means configured to determine a correction physical quantity corresponding to the pitching vibration detected by the body vibration detection means, and control the power regulating means based at least on the correction physical quantity,

wherein the correction means determines a drive force proportion between the engine and the power regulating means based on operation of the accelerator, and corrects a physical quantity corresponding to the drive force proportion based on the correction physical quantity,

wherein the power regulating means is a set of a starter and an alternator, and

when the correction physical quantity is negative, the correction means outputs the correction physical quantity as an instruction signal for driving the alternator, and

when the correction physical quantity is positive, the correction means outputs the correction physical quantity as an instruction signal for driving the starter.

3. A vehicle stability control system of a vehicle having a vehicle body, front and rear wheel suspensions that support the vehicle body, an accelerator and power regulating means for regulating engine power, thereby producing a desired vehicle drive force, the vehicle stability control system comprising:

body vibration detection means for detecting a pitching vibration of the vehicle body which occurs during running of the vehicle based on a vehicle body input torque from a quantity sensor; and

correction means configured to determine a correction physical quantity corresponding to the pitching vibration detected by the body vibration detection means, and control the power regulating means based at least on the correction physical quantity,

wherein the correction means determines a drive force proportion between the engine and the power regulating means based on operation of the accelerator, and corrects a physical quantity corresponding to the drive force proportion based on the correction physical quantity,

wherein the power regulating means is a starter, and

when the correction physical quantity is positive, the correction means outputs the correction physical quantity as an instruction signal for driving the starter.

4. A vehicle stability control system of a vehicle having a vehicle body, front and rear wheel suspensions that support the vehicle body, an accelerator and power regulating means for regulating engine power, thereby producing a desired vehicle drive force, the vehicle stability control system comprising:

body vibration detection means for detecting a pitching vibration of the vehicle body which occurs during running of the vehicle based on a vehicle body input torque from a quantity sensor; and

correction means configured to determine a correction physical quantity corresponding to the pitching vibration detected by the body vibration detection means, and control the power regulating means based at least on the correction physical quantity,

wherein the correction means determines a drive force proportion between the engine and the power regulating means based on operation of the accelerator, and corrects a physical quantity corresponding to the drive force proportion based on the correction physical quantity,

wherein the power regulating means is an alternator, and

when the correction physical quantity is negative, the correction means outputs the correction physical quantity as an instruction signal for driving the alternator.

5. A vehicle stability control system of a vehicle having a vehicle body, front and rear wheel suspensions that support the vehicle body, an accelerator and motor generator for regulating engine power, thereby producing a desired vehicle drive force, the vehicle stability control system comprising:

body vibration detection means for detecting a body vibration about a pitching center of the vehicle body which occurs during running of the vehicle; and

correction means for determining a drive force proportion between the engine and the motor generator based on operation of the accelerator, controlling operation of the motor generator according to the drive force proportion, and correcting a physical quantity corresponding to the drive force proportion based on a correction physical quantity corresponding to the body vibration, wherein

when the motor generator operates as a motor and the correction physical quantity is negative, the correction means subtracts an absolute value of the correction physical quantity from a physical quantity corresponding to a drive force increased by the motor generator, and

when the motor generator operates as a generator and the correction physical quantity is positive, the correction means subtracts an absolute value of the correction physical quantity from a physical quantity corresponding to a drive force reduced by the motor generator.

6. A vehicle stability control system of a vehicle having a vehicle body, front and rear wheel suspensions that support the vehicle body, an accelerator and a set of a starter and an alternator for regulating engine power, thereby producing a desired vehicle drive force, the vehicle stability control system comprising:

body vibration detection means for detecting a body vibration about a pitching center of the vehicle body which occurs during running of the vehicle; and

correction means for determining a drive force proportion between the engine and at least one of the starter and the alternator based on operation of the accelerator, controlling operation of the at least one of the starter and the alternator according to the drive force proportion, and correcting a physical quantity corresponding to the drive force proportion based on a correction physical quantity corresponding to the body vibration, wherein

when the correction physical quantity is negative, the correction means outputs the correction physical quantity as an instruction signal for driving the alternator, and

when the correction physical quantity is positive, the correction means outputs the correction physical quantity as an instruction signal for driving the starter.