Patent ID: 6945208

Claim:
A start control apparatus of an internal combustion engine, comprising: a starter which is to be driven when the internal combustion engine is started, a starter detection unit for detecting switching between drive and non-drive of the starter, a number-of-revolution detection unit for detecting the number of revolutions of the internal combustion engine, a crankshaft being connected to the internal combustion engine for rotating, a crank angle sensor for rotating in synchronization with the crankshaft and outputting a crank angle signal at predetermined angles and also having a reference position signal for indicating a reference angle in the crank angle signal, a cam shaft for rotating in a predetermined ratio to rotation of the crankshaft, a cam sensor for rotating in synchronization with the cam shaft and outputting a predetermined pattern signal for making a cylinder determination, and a control unit for performing ignition control of the internal combustion engine based on the output signals of both the crank angle sensor and the cam sensor, wherein the control unit has a start determination unit for determining whether starting the internal combustion engine is to be stopped or continued based on the crank angle relative to a reference crank angle and the number of revolutions just before the starter detection unit detects the starter being switched from a drive state to a non-drive state when the detected number of revolutions is less than idling speed, and performs ignition stop control to stop starting the internal combustion engine or performs ignition control to continue starting the internal combustion engine in accordance with the start determination result.