PURPOSE: To contrive the miniaturization of a starter by reducing necessary cranking force, by providing a valve connecting a combustion chamber and an auxiliary chamber or interrupting a connection between them, in a reciprocating internal-combustion engine.
CONSTITUTION: An auxiliary chamber 16 is formed within a cylinder head 4, the auxiliary chamber 16 is connected through a connecting duct 15 with a cylinder 3 and a combustion chamber 14 in the cylinder head, and a valve 17 is provided openably and closably in the connecting duct 15. When the valve 17 is released by tensing a flexible wire 19 at a starting time of an engine 1, the combustion chamber 14 and the auxiliary chamber 16 are connected with each other. The above fact means that the compression ratio of the engine 1 has been lowered, thereby a small starting force can be made sufficient enough. Miniaturization of a starter becomes possible, in this manner.
KANEKO YUKIO
OKAMOTO AKIRA
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