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

• US 6,260,405 B1
• Filed: 02/01/2000
• Issued: 07/17/2001
• 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:
  US09/495,331
• Time in Patent Office: 532 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 lateral acceleration sensor, comprising:

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

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

a low-select means for selecting a lower one of an output from said dividing means and a gravitational acceleration; and

an abnormality determining means for determining that a lateral acceleration sensor is abnormal when a lateral acceleration detected by said lateral acceleration sensor exceeds a value selected by said low-select means.

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

3. A system for detecting an abnormality of a lateral acceleration 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.

4. A system for detecting an abnormality of a lateral acceleration sensor according to claim 1, wherein said abnormality determining means determines that said lateral acceleration sensor is abnormal when the lateral acceleration detected by said lateral acceleration sensor exceeds the output from said low-select means either of when the vehicle is being turned leftwards and rightwards.

5. A system for detecting an abnormality of a lateral acceleration sensor according to claim 2, wherein said abnormality determining means determines that said lateral acceleration sensor is abnormal when the lateral acceleration detected by said lateral acceleration sensor exceeds the output from said low-select means either of when the vehicle is being turned leftwards and rightwards.

6. A system for detecting an abnormality of a lateral acceleration sensor according to claim 3, wherein said abnormality determining means determines that said lateral acceleration sensor is abnormal when the lateral acceleration detected by said lateral acceleration sensor exceeds the output from said low-select means either of when the vehicle is being turned leftwards and rightwards.