Internal combustion engine with dual ignition for a lean burn

Details Internal combustion engine with dual ignition for a lean burn Internal combustion engine with dual ignition for a lean burn

1993-03-10

1994-06-14

Nelli, Raymond A.

Internal-combustion engines

Combustion chamber having multiple spark gaps

1231936, 123306, F02P 1502

Patent

active

053200756

ABSTRACT:
An internal combustion engine (10) with dual ignition has two spark plugs (70) and (72) mounted in a cylinder head (16) that forms a combustion chamber (44) in conjunction with the cylinder (14) and piston (18). The spark plugs sequentially ignite the lean air-fuel mixture in the combustion chamber towards the end of the compression stroke. The piston (18) has a recess (80) of variable width and depth that has its narrow portion in proximity to the spark plug (70) and wider and deeper portion aligned under spark plug (72). The ignition by spark plug (72) is delayed with respect to the ignition by spark plug (70).

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