Patent ID: 7444963

Claim:
A combustion power tool comprising: a combustion chamber, a gas supply section that supplies flammable gas into the combustion chamber, a single spark plug that is disposed within the combustion chamber and outputs electric power supplied from a power supply to burn the flammable gas within the combustion chamber, an ignition control device that controls power to be outputted at the single spark plug, a cylinder connected to the combustion chamber, a piston member that is disposed within the cylinder to slide within the cylinder by combustion pressure which is generated by combustion of the flammable gas in the combustion chamber and a tool member that is actuated by sliding movement of the piston member to apply an impact force to a workpiece so as to perform a predetermined operation, wherein the ignition control device includes a plurality of ignition circuits that are connected to the single spark plug and can independently input power to the spark plug, and a control section that controls the manner of power input in each of the ignition circuits.