Direct fuel injection type spark ignition internal combustion en

Details Direct fuel injection type spark ignition internal combustion en Direct fuel injection type spark ignition internal combustion en

1991-04-24

1992-05-05

Nelli, Raymond A.

Internal-combustion engines

Precombustion and main combustion chambers in series

Having fluid whirling means

123276, F02R 3100

Patent

active

051098164

ABSTRACT:
A direct fuel injection type spark ignition internal combustion engine includes a piston/cylinder structure including a deep dish portion, a peripheral portion, and a shallow dish portion. The peripheral portion has a depth smaller than the deep dish portion and greater than the shallow dish portion and a diameter larger than the deep dish portion and smaller than the shallow dish portion. At medium engine loads, fuel is injected toward an edge portion defined between the deep dish portion and the peripheral portion and is divided by the edge portion into two portions. One portion flows into the peripheral portion and is evaporated to generate a moderately rich air-fuel mixture which helps to propagate flame from the deep dish portion to the remaining portion of a combustion chamber including the shallow dish portion.

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patent: 4733642 (1988-03-01), Uhida
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