Device for detecting failure of microcomputer in antilock controller
First Claim
Patent Images
1. An antilock controller comprising:
- wheel speed detecting means for producing wheel speed signals;
means for splitting each of said wheel speed signals into two identical split signals; and
a single control logic operation circuit including;
a single central processing unit;
at least two input terminals through which said split signals are separately inputted in said logic operation circuit;
a first variable storage means for receiving one of said two split signals;
a second variable storage means for receiving the other of said two split signals;
a first processing program defining a means for controlling said central processing unit to process said one of said two split signals to determine a first output;
a second processing program defining a means which is identical to and separate from said first processing program for controlling said central processing unit to process said split signal to determine a second output;
at least two output terminals through which said first and second outputs are separately outputted;
an output determining logic circuit for processing said first and second outputs and determining an output signal for driving solenoid valves, relays and other driven elements; and
an output abnormality detection circuit for determining whether the output signal is normal by comparing and calculating the signals processed by said output determining logic circuit.
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Abstract
An anti-lock controller apparatus is constituted of a single microcomputer to reduce production costs and improve safety and reliability. Signals of wheel speed sensors S1 to S4 divided into two groups by an input processing circuit and are inputted to the single microcomputer. The single microcomputer executes two-system input/output processing and checks for abnormalities of the input/output signals.
17 Citations
16 Claims
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1. An antilock controller comprising:
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wheel speed detecting means for producing wheel speed signals; means for splitting each of said wheel speed signals into two identical split signals; and a single control logic operation circuit including;
a single central processing unit;
at least two input terminals through which said split signals are separately inputted in said logic operation circuit;
a first variable storage means for receiving one of said two split signals;
a second variable storage means for receiving the other of said two split signals;
a first processing program defining a means for controlling said central processing unit to process said one of said two split signals to determine a first output;
a second processing program defining a means which is identical to and separate from said first processing program for controlling said central processing unit to process said split signal to determine a second output;
at least two output terminals through which said first and second outputs are separately outputted;
an output determining logic circuit for processing said first and second outputs and determining an output signal for driving solenoid valves, relays and other driven elements; and
an output abnormality detection circuit for determining whether the output signal is normal by comparing and calculating the signals processed by said output determining logic circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A control logic operation circuit for use in an antilock controller comprising:
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a single control logic operation circuit including a single central processing unit, at least one input terminal, a processing program defining a means for controlling said central processing unit to process an input signal inputted through said input terminal to determine an output, a storage means for storing said input signal and said output, and a first and a second checking program defining a means for separately controlling said central processing unit to perform logic operations separately from each other, compare the results of the logic operations, and produce an abnormality signal if the results are not coincident with each other. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification