Motor vehicle state detecting system
First Claim
1. A motor vehicle state detecting system for detecting an unstable state of a motor vehicle or alternatively a prognostic sign thereof, comprising:
- first detecting means for detecting an actual measured value of a first parameter corresponding to either a side slip angle or alternatively a steering angle of said motor vehicle;
second detecting means for detecting an actual measured value of a second parameter corresponding to either an alignment torque or alternatively a transverse acceleration which said motor vehicle is subjected to;
arithmetic means for arithmetically determining a third parameter relevant to a correlation which said first and second parameters bear to each other;
reference value setting means for setting in advance a comparison reference value for said third parameter; and
motor vehicle behavior stability decision means for making decision that behavior of said motor vehicle is unstable when said third parameter departs from said comparison reference value.
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Accused Products
Abstract
System for detecting stability/instability of behavior of a motor vehicle upon occurrence of tire slip or lock. State of the motor vehicle is determined on the basis of an alignment torque (Ta) applied from a road and a side slip angle (β). By taking advantage of such torque/slip-angle characteristic that although the alignment torque is proportional to a side slip angle when the latter is small, the alignment torque becomes smaller as the side slip angle increases, a normal value is determined from a straight line slope and the side slip angle in a region where the latter is small. Unstable behavior of the motor vehicle is determined when deviation of actual measured value from the normal value increases. Further, unstable state is determined when the slope of the alignment torque for the slip angle departs significantly from that of approximate straight line slope.
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Citations
27 Claims
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1. A motor vehicle state detecting system for detecting an unstable state of a motor vehicle or alternatively a prognostic sign thereof, comprising:
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first detecting means for detecting an actual measured value of a first parameter corresponding to either a side slip angle or alternatively a steering angle of said motor vehicle;
second detecting means for detecting an actual measured value of a second parameter corresponding to either an alignment torque or alternatively a transverse acceleration which said motor vehicle is subjected to;
arithmetic means for arithmetically determining a third parameter relevant to a correlation which said first and second parameters bear to each other;
reference value setting means for setting in advance a comparison reference value for said third parameter; and
motor vehicle behavior stability decision means for making decision that behavior of said motor vehicle is unstable when said third parameter departs from said comparison reference value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification