Steering stability control system for vehicle

• US 5,446,657 A
• Filed: 02/11/1993
• Issued: 08/29/1995
• Est. Priority Date: 02/14/1992
• Status: Expired due to Term

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Inventors: Ohmomo, Naoki, Nishihara, Takashi, Ikeda, Tooru, Kiryu, Hironobu, Shiraishi, Shuji
• Primary Examiner(s): Teska, Kevin J.
• Assistant Examiner(s): PARK, COLLIN
• Application Number:
  US08/015,173
• Time in Patent Office: 929 Days
• Field of Search: 364/424.01, 364/424.05, 364/426.01, 364/426.02, 364/426.03, 180/79, 180/79.1, 180/132, 180/140, 180/141, 180/142, 180/143, 180/282, 180/197, 280/840, 280/707, 280/DIG. 1
• US Class Current: 701/41
• CPC Class Codes: B60K 28/10 responsive to conditions relating to the vehicle

Abstract

A steering stability control system for a vehicle includes a turning state judging device for judging turning state of the vehicle to output an oversteering signal or an understeering signal, and a steering stability control device for controlling an output torque from an engine on the basis of an output from the turning state judging device. This system further includes a counter-steering judging device capable of judging a counter-steering state of the vehicle and causing the turning state judging device to output an oversteering signal when the counter-steering state is judged. Thus, it is possible to reliably judge the oversteering and the understeering during turning of the vehicle.

Claims

1. A steering stability control system for a vehicle having an engine, comprising a turning state judging means for judging a turning state of the vehicle and outputting either an oversteering signal or an understeering signal based on said turning state of the vehicle, and a steering stability control means for controlling an output torque from said engine on the basis of an output from said turning state judging means, wherein

said system further includes a counter-steering judging means for judging a counter-steering state of the vehicle and causing said turning state judging means to output said oversteering signal for controlling the output torque from the engine according to said oversteering signal when said counter-steering state is judged.

2. A steering stability control system for a vehicle according to claim 1, wherein said turning state judging means judges the turning state on the basis of a deviation of an actual yaw rate of the vehicle from a reference yaw rate of the vehicle.

3. A steering stability control system for a vehicle according to claim 1, wherein said counter-steering judging means judges a counter-steering state on the basis of a steering angle and a lateral acceleration of the vehicle.

4. A steering stability control system for a vehicle having an engine, comprising a turning state judging means for judging a turning state of the vehicle and outputting either an oversteering signal or an understeering signal based on said turning state of the vehicle, and a steering stability control means for controlling a driven wheel torque on the basis of an output from said turning state judging means, wherein

said system further includes a counter-steering judging means for judging a counter-steering state of the vehicle and causing said turning state judging means to output said oversteering signal for controlling the driven wheel torque according to said oversteering signal when said counter-steering state is judged.