System for detecting abnormality of yaw rate sensor and lateral acceleration sensor

• US 6,276,188 B1
• Filed: 02/01/2000
• Issued: 08/21/2001
• Est. Priority Date: 09/02/1997
• 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: Horiuchi, Yutaka
• Primary Examiner(s): RAEVIS, ROBERT R
• Application Number:
  US09/495,330
• Time in Patent Office: 567 Days
• Field of Search: 73/13.7, 73/17.9, 73/17.5
• US Class Current: 73/1.37
• CPC Class Codes: B60G 2400/0523 Yaw rate
• CPC Class Codes: B60G 2600/08 Failure or malfunction detecting means
• CPC Class Codes: B60G 2800/80 Detection or control after a system or component failure
• CPC Class Codes: B60T 2270/411 Offset failure
• CPC Class Codes: B60T 2270/413 Plausibility monitoring, cross check, redundancy
• CPC Class Codes: B60T 8/885 using electrical circuitry

Abstract

Abnormality of a yaw rate sensor, including a state in which the neutral point is normal, but the sensitivity is abnormal, is detected with high accuracy, irrespective of the situation of a road surface traveled. A lower one of an output from a dividing device for dividing a vehicle speed detected by the vehicle speed detecting device by a minimum radius of turning of a vehicle and an output from a dividing device for dividing a gravitational acceleration by the vehicle speed detected by the vehicle speed detecting device, is selected in a low-select device. It is determined in an abnormality determining device that the yaw rate sensor is abnormal when a yaw rate detected by the yaw rate sensor exceeds a value selected in the low-select device.

Claims

1. A system for detecting an abnormality of a yaw rate sensor, comprising:

a vehicle speed detecting means for detecting a vehicle speed of a vehicle;

a dividing means for dividing an index representing a centripetal acceleration of the vehicle by the vehicle speed detected by said vehicle speed detecting means;

a multiplying means for multiplying an index representing a turning radius of the vehicle by the vehicle speed detected by said vehicle speed detecting means;

a low-select means for selecting a lower one of outputs from said dividing means and said multiplying means; and

an abnormality determining means for determining that a yaw rate sensor is abnormal when a yaw rate detected by said yaw rate sensor exceeds an index selected by said low-select means.

2. A system for detecting an abnormality of a yaw rate sensor according to claim 1, wherein said index representing the centripetal acceleration of the vehicle is a gravitational acceleration.

3. A system for detecting an abnormality of a yaw rate sensor according to claim 1, wherein said index representing the centripetal acceleration of the vehicle is a lateral acceleration detected by a lateral acceleration sensor.

4. A system for detecting an abnormality of a yaw rate sensor according to claim 1, wherein said index representing the turning radius of the vehicle is a minimum turning radius of the vehicle.

5. A system for detecting an abnormality of a yaw rate sensor according to claim 1, wherein said index representing the turning radius of the vehicle is a reciprocal of a value obtained by multiplying by a given constant a steering angle of a steering wheel detected by a steering angle sensor.