To obtain the overall controller in which the effect of a communication delay is minimized without losing the ease of extension of an automobile system.

The controller is provided with an arithmetic means 301 including a microcomputer 301C computing various control variables, a drive means 302 driving plural actuators 105 in response to each control variable, and an interface means 103 interfacing the arithmetic means 301 and the drive means 302, each actuator 105 includes at least either of an injector and an igniter provided to each cylinder and the control variables include at least either of a fuel jet amount and an ignition time. In this case, various sensor signals from sensors 104 are given to the arithmetic means 301, and the microcomputer in the arithmetic means 301 includes an input processing means to process the input of various sensor signals.