Divided auxiliary combustion chamber for internal combustion eng

Details Divided auxiliary combustion chamber for internal combustion eng Divided auxiliary combustion chamber for internal combustion eng

1978-03-27

1980-01-01

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

041811020

ABSTRACT:
The auxiliary combustion chamber of a four-cycle stratified-charge piston engine is divided into a primary cavity, and a secondary cavity provided with a baffle. The primary cavity receives a relatively rich mixture which passes into the secondary cavity, and the main combustion chamber receives a relatively lean mixture. The primary cavity is in communication with a spark plug. A long torch passage insert piece 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: 4089306 (1978-05-01), Goloff
patent: 4095565 (1978-06-01), Noguchi et al.

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