Abstract: A software component assigning system for a vehicle includes electronic control units connected to a common network in the vehicle, one of the electronic control units being an integrated control electronic control unit which is configured to: acquire a first rank value of each of the electronic control units, the first rank value becoming higher as a probability of occurrence of a malfunction is higher; acquire a second rank value of an additional software component that is additionally arranged in any one of the electronic control units, the second rank value becoming higher as a level of importance; and decide an electronic control unit to arrange the additional software component from among the electronic control units such that the additional software component is arranged in the electronic control unit of which the first rank value is lower as the second rank value of the additional software component is higher.

Abstract: If the capacitance of a snubber capacitor, the inductance of a coil and the magnitude of a resistor are specified such that the resonance frequency of the snubber circuit coincides with the ringing frequency of the transistor, and the impedance of the first loop at the resonance frequency becomes smaller than the impedance of the second loop at the resonance frequency, a current component due to ringing flows in the snubber circuit, and energy is consumed by the resistor. Therefore, it is possible to quickly converge ringing.

Abstract: If the capacitance of a snubber capacitor, the inductance of a coil and the magnitude of a resistor are specified such that the resonance frequency of the snubber circuit coincides with the ringing frequency of the transistor, and the impedance of the first loop at the resonance frequency becomes smaller than the impedance of the second loop at the resonance frequency, a current component due to ringing flows in the snubber circuit, and energy is consumed by the resistor. Therefore, it is possible to quickly converge ringing.

Abstract: A software component assigning system for a vehicle includes electronic control units connected to a common network in the vehicle, one of the electronic control units being an integrated control electronic control unit which is configured to: acquire a first rank value of each of the electronic control units, the first rank value becoming higher as a probability of occurrence of a malfunction is higher; acquire a second rank value of an additional software component that is additionally arranged in any one of the electronic control units, the second rank value becoming higher as a level of importance; and decide an electronic control unit to arrange the additional software component from among the electronic control units such that the additional software component is arranged in the electronic control unit of which the first rank value is lower as the second rank value of the additional software component is higher.