Piston and combustion chamber with improved fuel circulation

Details Piston and combustion chamber with improved fuel circulation Piston and combustion chamber with improved fuel circulation

1981-11-27

1983-04-05

Lall, P. S.

Internal-combustion engines

Means to whirl fluid before, upon, or after entry into...

Structural projection on working piston causes whirling

123290, 123193P, 123193CH, 123193H, F02F 324

Patent

active

043787649

ABSTRACT:
An internal combustion engine, which has a combustion chamber with a coordinated piston where the combustion chamber is divided into a first and second section, and where the piston has an extension which slides into the second chamber section during the later part of the piston's upward movement, and compresses the fuel-air mixture contained in that chamber section to a pressure somewhat higher than the pressure in the first section. The second chamber wall and the piston extension has two air passages, which are coordinated in such a way that during the last part of the compression cycle, the air passages overlap and provide an escape passage for the fuel-air mixture in the second section which is released suddenly into the first combustion chamber section and sets the fuel-air mixture in that section in a swirling motion, which helps to better mix the fuel and the air, and facilitates the ignition process of a lean mixture when used with a suitably adapted, extended electric spark ignition. The invention is also applicable to an engine of the diesel type and to two cycle engines.

REFERENCES:
patent: 1722517 (1929-07-01), Curtis
patent: 2688320 (1954-09-01), Czarnocki
patent: 2735416 (1956-02-01), Ferguson et al.
patent: 4026250 (1977-05-01), Funiciello
patent: 4235203 (1980-11-01), Thery

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