ABNORMALITY DETECTING APPARATUS FOR WHEEL SPEED SENSORS AND AUTOMOBILE INCORPORATING THE SAME
First Claim
1. An abnormality detecting apparatus for wheel speed sensors detecting abnormality of wheel speed sensors arranged at each of driving wheels and idler wheels of a vehicle, wherein said wheel speed sensors detect rotational speeds of corresponding said driving wheels and said idler wheels, said abnormality detecting apparatus for wheel speed sensors comprises:
- a wheel speed calculating portion calculating wheel speeds of said driving wheels and wheel speeds of said idler wheels based on the detected rotational speeds of said driving wheels and the detected rotational speeds of said idler wheels, respectively; and
an abnormality detecting portion detecting abnormality of said wheel speed sensors based on the calculated wheel speeds, wherein said abnormality detecting portion detects the abnormality of said wheel speed sensors based on;
a first wheel speed that is at least one of the wheel speeds of said driving wheels and said idler wheels being substantially zero;
at least one of the wheel speeds except for said first wheel speed being greater than a prescribed threshold value; and
an average wheel speed of left and right said idler wheels being greater than an average wheel speed of left and right said driving wheels.
1 Assignment
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Accused Products
Abstract
Wheel speed sensors arranged at each of driving wheels and idler wheels detect rotational speeds of corresponding wheels. ECU includes a wheel speed calculating portion calculating wheel speeds of the driving wheels and the idler wheels based on the detected rotational speeds, and an abnormality detecting portion detecting abnormality of the wheel speed sensors based on the calculated wheel speeds. The abnormality detecting portion detects the abnormality of the wheel speed sensors based on: a first wheel speed that is at least one of the wheel speeds of the driving wheels and the idler wheels being substantially zero; at least one of the wheel speeds except for the first wheel speed being greater than a prescribed threshold value; and an average wheel speed of the idler wheels being greater than an average wheel speed of the driving wheels.
8 Citations
5 Claims
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1. An abnormality detecting apparatus for wheel speed sensors detecting abnormality of wheel speed sensors arranged at each of driving wheels and idler wheels of a vehicle, wherein
said wheel speed sensors detect rotational speeds of corresponding said driving wheels and said idler wheels, said abnormality detecting apparatus for wheel speed sensors comprises: -
a wheel speed calculating portion calculating wheel speeds of said driving wheels and wheel speeds of said idler wheels based on the detected rotational speeds of said driving wheels and the detected rotational speeds of said idler wheels, respectively; and
an abnormality detecting portion detecting abnormality of said wheel speed sensors based on the calculated wheel speeds, wherein said abnormality detecting portion detects the abnormality of said wheel speed sensors based on;
a first wheel speed that is at least one of the wheel speeds of said driving wheels and said idler wheels being substantially zero;
at least one of the wheel speeds except for said first wheel speed being greater than a prescribed threshold value; and
an average wheel speed of left and right said idler wheels being greater than an average wheel speed of left and right said driving wheels. - View Dependent Claims (2, 3, 4, 5)
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Specification