INTERNAL COMBUSTION ENGINE

摘要

In an internal combustion engine, an injection hole is provided in the cylinder head to inject narrow streams of air towards the spark gap, particularly during idling and lowload running conditions. The injected air is 5 to 30% by weight of the intake fuel-air mixture provided via the intake manifold and creates a swirl or turbulence thereby increasing combustibility. The hole is connected via a sub-intake passage to the main air intake passage upstream of the venturi in the carburetor or between the venturi and throttle valve.