Fuel injection for divided auxiliary chamber of engine

Details Fuel injection for divided auxiliary chamber of engine Fuel injection for divided auxiliary chamber of engine

1978-03-27

1979-07-24

Lazarus, Ronald H.

Internal-combustion engines

Two-cycle

Rear compression

123191S, 123191SP, 123 32SP, 123 32ST, 123 32L, 123 32K, F02B 1918, F02B 7502

Patent

active

041619277

ABSTRACT:
The auxiliary combustion chamber of a four-cycle stratified-charge piston engine is divided into a primary cavity and a secondary cavity. Fuel injection produces a relatively rich mixture in the primary cavity and in the secondary cavity, and the main combustion chamber receives a relatively lean mixture. A spark plug communicates with the primary cavity. A long torch passage connects the primary cavity with the central portion of the main combustion chamber, and one or more short torch passages connect the secondary cavity with a peripheral portion of the main combustion chamber. The purpose is to reduce emission of NO.sub.x without adversely affecting emissions of CO and HC, and to improve fuel economy.

REFERENCES:
patent: 3832984 (1974-09-01), Taguchi
patent: 4004563 (1977-01-01), Nakamura
patent: 4076000 (1978-02-01), Takao
patent: 4098246 (1978-07-01), Noguchi

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