Supplementary port for two stroke engine

Details Supplementary port for two stroke engine Supplementary port for two stroke engine

1996-06-27

1998-11-10

McMahon, Marguerite

Internal-combustion engines

Two-cycle

Whirl through piston-controlled ports

F02D 4300

Patent

active

058328815

ABSTRACT:
A two stroke internal combustion engine having at least one cylinder (1) with exhaust port means (5), the engine further including at least one supplementary passage (9) in addition to the exhaust port means (5) for allowing gas flow from the cylinder (1), and control means (7) for controlling the gas flow through the supplementary passage (9) as a function of predetermined operating conditions of the engine wherein the control means allows at least substantially unimpeded gas flow therethrough during a compression stroke of the engine when the engine is at least at idle, low engine loads and/or engine speeds, and/or during engine start-up and at least substantially prevents gas flow therethrough when the engine is at higher engine loads and/or engine speeds.

REFERENCES:
patent: 4121552 (1978-10-01), Mithuo et al.
patent: 4909193 (1990-03-01), Boyesen
patent: 4911115 (1990-03-01), Boyesen
patent: 5183013 (1993-02-01), Ito et al.
patent: 5190006 (1993-03-01), Motoyama et al.
patent: 5373816 (1994-12-01), Asai et al.
Patent Abstracts of Japan, M-607, p. 110, JP 62-35024.
Patent Abstracts of Japan, M-620, p. 162, JP 62-70616.
Patent Abstracts of Japan, M-671, p. 21, JP-62-206221.
International Publication No. WO 90/14612 published Nov. 29, 1990.

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