Control device for vehicles to make rapid counter-measure against communication abnormality in communication means between calculation control devices

A control device for vehicles comprising:

• first and second calculation control devices and a communication means connecting therebetween, the first calculation control device calculating a target control amount for operating the second calculation control device to execute a vehicle operation control according to a vehicle state amount, the second calculation control device executing the operation control of the vehicle based upon the target control amount input from the first calculation control device by way of the communication means;
• and
• a third calculation control device connected with the first and second calculation control devices by way of the communications means, wherein the third calculation control device compares the target control amount input from the first calculation control device by way of the communication means and the target control amount input from the second calculation control device, and the abnormality judgment is made by the third calculation control device based upon the comparison, wherein
• the second calculation control device calculates an amount for comparison for the target control amount for the vehicle operation control in addition to executing the operation control of the vehicle in a more convenient way compared to the calculation in the first calculation control device,
• the target control amount calculated by the first calculation control device and the amount for comparison for the target control amount calculated by the second calculation control device are compared with one another in the second calculation control device,
• the vehicle operation control is executed by the second calculation control device according to the target control amount calculated by the first calculation control device and transmitted thereto by way of the communication means as long as no abnormality is judged based upon the comparison but modified in a manner thereof according to an abnormality judgment based upon the comparison, and
• the target control amount is an adjusting amount of steering angle of steered wheels relative to a steering angle of a steering wheel, and the third calculation control device is an electronic control device for an electric power steering device.