Vehicle electronic controller
First Claim
1. An electronic controller for a vehicle having an actuator, the electronic controller comprising:
- a control microcomputer for calculating control data to control the actuator in the vehicle in accordance with a driving condition of the vehicle; and
a monitoring IC connected to the control microcomputer to perform a check of whether a determination value used by the control microcomputer to check for abnormality of the control data is normal, and if the check indicates that the determination value is normal, storing the determination value;
wherein the control microcomputer has a plurality of determination values, calculates a plurality of mirror values, each of which is complement of a corresponding one of the determination values, calculates a sum of the plurality of determination values, and simultaneously sends either the mirror values or the sum to the monitoring IC together with the determination values.
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Accused Products
Abstract
A vehicle electronic controller for checking a control microcomputer with a common monitoring IC, which is used in different vehicles. The vehicle electronic controller includes a control microcomputer, which calculates control data to control an actuator installed in a vehicle in accordance with a driving condition of the vehicle, and a monitoring IC, which is connected to the control microcomputer and checks whether or not the control data is normal based on a determination value. The control microcomputer provides the determination value to the monitoring IC. The monitoring IC includes a memory device, which stores the determination value in a rewritable manner. The monitoring IC receives the determination value and stores the determination value in the memory device.
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Citations
17 Claims
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1. An electronic controller for a vehicle having an actuator, the electronic controller comprising:
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a control microcomputer for calculating control data to control the actuator in the vehicle in accordance with a driving condition of the vehicle; and a monitoring IC connected to the control microcomputer to perform a check of whether a determination value used by the control microcomputer to check for abnormality of the control data is normal, and if the check indicates that the determination value is normal, storing the determination value; wherein the control microcomputer has a plurality of determination values, calculates a plurality of mirror values, each of which is complement of a corresponding one of the determination values, calculates a sum of the plurality of determination values, and simultaneously sends either the mirror values or the sum to the monitoring IC together with the determination values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An electronic controller for a vehicle having an actuator, the electronic controller comprising:
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a control microcomputer for calculating control data to control the actuator in the vehicle in accordance with a driving condition of the vehicle; a monitoring IC connected to the control microcomputer to perform a check of whether a determination value used by the control microcomputer to check for abnormality of the control data is normal; and a rewritable non-volatile memory connected to the monitoring IC, wherein the control microcomputer sends the determination value to the monitoring IC, and the monitoring IC receives the determination value and stores the determination value in the non-volatile memory if the check performed by the monitoring IC indicates that the determination value is normal; wherein the control microcomputer has a plurality of determination values and calculates a plurality of mirror values, each of which is complement of a corresponding one of the determination values, calculates the sum of the determination values, and simultaneously sends either the mirror values or the sum to the monitoring IC together with the determination values, the monitoring IC determines whether the determination values are normal with either the mirror values or the sum and requests the control microcomputer to resend the determination values and either the mirror values or the sum when the determination values are determined not to be normal, and the monitoring IC stores the determination values in the non-volatile memory when the determination values are determined to be normal. - View Dependent Claims (10, 11, 12)
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13. A method for checking an electronic controller for a vehicle, the electronic controller including a control microcomputer, which calculates control data to control an actuator installed in the vehicle in accordance with a driving condition of the vehicle, and a monitoring IC, which is connected to the control microcomputer, the method comprising:
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storing a determination value in the control microcomputer to check whether the control data is normal; sending the determination value to the monitoring IC from the control microcomputer; in the monitoring IC, performing a check of whether the determination value is normal; and if the check indicates that the determination value is normal, storing the determination value; wherein the control microcomputer includes a plurality of determination values and the monitoring IC includes a memory device for storing the determination values in a rewritable manner, the method further comprising; calculating a plurality of mirror values, each of which is complement of a corresponding one of the determination values, and calculating a sum of the determination values; simultaneously sending either the mirror values or the sum to the monitoring IC together with the determination values; determining whether the determination values are normal with the monitoring IC using either the mirror values or the sum; requesting the control microcomputer to resend the determination values and either the plurality of mirror values or the sum from the monitoring IC when the determination values are determined not to be normal; and storing the plurality of determination values in the memory device when the determination values are determined to be normal. - View Dependent Claims (14, 15, 16, 17)
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Specification