Engine

Abstract

In an engine provided with a pre-chamber spark plug, the pre-chamber is formed by a torch sleeve mounted on a cylinder head and having nozzles and a spark plug. In the torch sleeve, a tip protruding from the cylinder head has a tapering portion the diameter of which gradually decreases toward a piston, or specifically a tapered section. The tapered section is provided with a plurality of nozzles. A clean version of the Abstract is provided below: In an engine provided with a pre-chamber spark plug, the pre-chamber is formed by a torch sleeve mounted on a cylinder head and having nozzles and a spark plug. In the torch sleeve, a tip protruding from the cylinder head has a tapering portion the diameter of which gradually decreases toward a piston, or specifically a tapered section. The tapered section is provided with a plurality of nozzles.

Dependencies are inferred from the claim text.