Two stroke engine having reduced height pistons

Details Two stroke engine having reduced height pistons Two stroke engine having reduced height pistons

2001-03-23

2004-08-31

Yuen, Henry O. (Department: 3747)

Internal-combustion engines

Two-cycle

Pump and cylinder coaxial

C123S0650PE

Reexamination Certificate

active

06782850

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention refers to modifications to the current two-stroke cycle internal combustion engines, those which execute one full cycle for each rotation of the crankshaft, with the difference that it uses shorter pistons and the fuel does not enter the engine crankcase. For this purpose, it is proposed: a) To use piston rods solid with the pistons, similar to those used by engines using double acting pistons (such as steam engines); b) to install rotary valves in the transfer and exhaust ports; c) operate one-way flow valves directly by pressure differential; d) to install an auxiliary mechanism to pump lubricant to the piston rings.


REFERENCES:
patent: 2183116 (1939-12-01), Coates
patent: 2689679 (1954-09-01), Wales
patent: 3550569 (1970-12-01), Hooper
patent: 4185597 (1980-01-01), Cinquegrani
patent: 5050570 (1991-09-01), Thring
patent: 5791303 (1998-08-01), Skripov
patent: 5884590 (1999-03-01), Minculescu

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