Malfunction detection device and method for a wheel speed sensor
First Claim
Patent Images
1. A malfunction detection device for a wheel speed sensor comprising:
- a comparison circuit for comparing a wheel speed signal output from a wheel speed sensor with a predetermined voltage;
a calculation circuit selectively increasing or decreasing a counter according to an output signal of the comparison circuit;
a malfunction signal output circuit outputting a malfunction signal when the counter of the calculation circuit reaches a predetermined value; and
wherein speeds of the increase and the decrease of the counter differ from each other.
1 Assignment
0 Petitions
Accused Products
Abstract
A malfunction detection device for a wheel speed sensor includes a comparison circuit for comparing a wheel speed signal output from a wheel speed sensor with a predetermined voltage. A calculation circuit is provided for selectively increasing or decreasing a counter according to an output signal of the comparison circuit. A malfunction signal output circuit outputs a malfunction signal when the counter of the calculation circuit reaches a predetermined value.
-
Citations
4 Claims
-
1. A malfunction detection device for a wheel speed sensor comprising:
-
a comparison circuit for comparing a wheel speed signal output from a wheel speed sensor with a predetermined voltage;
a calculation circuit selectively increasing or decreasing a counter according to an output signal of the comparison circuit;
a malfunction signal output circuit outputting a malfunction signal when the counter of the calculation circuit reaches a predetermined value; and
wherein speeds of the increase and the decrease of the counter differ from each other. - View Dependent Claims (2)
-
-
3. A malfunction detection method for a wheel speed sensor comprising:
-
a comparison step for comparing a wheel speed signal output from a wheel speed sensor with a predetermined voltage and for outputting an output signal;
a calculation step for selectively increasing or decreasing a counter according to the output signal;
a malfunction signal output step for outputting a malfunction signal when the counter reaches a predetermined value;
wherein speeds of the increase and the decrease of the counter differ from each other. - View Dependent Claims (4)
-
Specification