Control system for vehicles for decreasing controlling amount by judging abnormality

• US 20080097671A1
• Filed: 10/18/2005
• Published: 04/24/2008
• Est. Priority Date: 10/18/2004
• Status: Active Grant

• Current Assignee: Advics Company Limited (Aisin Corp.), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Advics Company Limited (Aisin Corp.), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Kojo, Takahiro, Tsuchiya, Yoshiaki, Suzumura, Masato, Asano, Kenji
• Granted Patent: US 8,565,974 B2
• Time in Patent Office: Days
• US Class Current: 701/43
• CPC Class Codes: B60T 2260/02 Active Steering, Steer-by-Wire
• CPC Class Codes: B60T 2270/402 Back-up
• CPC Class Codes: B60T 2270/413 Plausibility monitoring, cross check, redundancy
• CPC Class Codes: B62D 5/0481 monitoring the steering system, e.g. failures

Abstract

In view of the matter that an abnormality occurred in an operating portion of a control system comes out in an early stage as a result of the control, while it takes a time for an abnormality occurred in the generation of a controlling amount for controlling the operation of an operating portion to come out, in ceasing the control when an abnormality has occurred in the control system the controlling amount is decreased at a higher speed when the abnormality of the controlling amount was judged than a speed at which the operation of the operating device is decreased when the abnormality of the operating device was judged.

Claims

1. A control system comprising an operating device for operating a member for adjusting a behavior of a vehicle, and a calculating device for calculating a controlling amount for controlling the operation of the operating device, characterized by judging an abnormality of the operating device and an abnormality of the controlling amount, and decreasing the controlling amount at a higher speed when the abnormality of the controlling amount was judged than a speed at which the operation of the operating device is decreased when the abnormality of the operating device was judged.

2. A control system according to claim 1, wherein the calculating device comprises first and second calculating portions for calculating the controlling amount, so as to judge the abnormality of the controlling amount by comparing the controlling amounts by the first and second calculating portions with one another.

3. A control system according to claim 2, wherein even when it was judged that the abnormality has occurred in either of the controlling amounts calculated by the first and second calculating portions, the control of the operation of the operating device thereafter is carried out by decreasing the controlling amount which has been used up to the time in the control of the operation of the operating device.

4. A control system according to claim 2, wherein when it is judged which of the controlling amounts calculated by the first and second calculating portions is abnormal, thereafter the operation of the operating device is controlled by using the controlling amount judged not to be abnormal to decrease the normal controlling amount.

5. A control system according to claim 1, wherein the abnormality judgment of the controlling amount is carried out when the operating device is not judged to be abnormal.

6. A control system according to claim 1, wherein the operating device is a steering angle adjusting device for adjusting a steering angle of steered wheels relative to a steering amount by a steering wheel, and the decrease of the controlling amount and the operation of the operating device is to decrease the steering adjusting amount of the steered wheels to 0.