Patent ID: 8044531

Claim:
An engine starting device, comprising: an ignition switch configured to cause turning-on and off of a main power source line connecting a power source for a vehicle and an engine control unit (ECU), the ignition switch comprising a stationary contact and a movable contact that is rotatable relative to the stationary contact, wherein the stationary contact comprises a main contact configured to be connected to a power source input section of the ECU and a starter contact configured to be connected to a starter, the movable contact is configured switch its connection/disconnection with the respective contacts of the stationary contact by the rotation of the movable contact to an off-position, an on-position and a starter position relative to the stationary contact, and both the main contact and the starter contact are configured to be connected to the power source of the vehicle when the movable contact is rotated to the starter contact; and a relay provided on a sub power source line that is connected in parallel to the main power source line, the relay connecting the power source of the vehicle and a sub power source input section of the ECU, the relay being excited by the start of the ECU and providing electric continuity between the power source and the ECU.