SU1733647A1 - Plate valve of two-cycle internal combustion engine - Google Patents

Abstract

SUMMARY OF THE INVENTION: A plate valve comprises a housing 1 molded together with an engine crankcase in which windows 2 are located, closed by elastic valves 3 under which plastic gaskets 4 are attached to soften blows against the housing 1, which together with plate valves 3 are attached to the housing 1. Inside the housing 1, between the flap 3, there is a shaft 5 with cams 6, which receives rotation from the engine crankshaft and rotates two times slower than the crankshaft. When the shaft 5 rotates, the cams 6 overlap the plate valves 3 and, by bending them, open the passage of the combustible mixture sucked from the carburetor into the crankcase. Crashing down the cams 6 from the plate valves 3, they return to their original position, pressing against the housing 1 through the plastic gaskets 4. The controllable plate valve allows you to set the beginning of the opening and closing of the intake and provides a large flow area regardless of the depression in the engine crankcase. 1 hp f-ly, 2 ill. (Ls

Description

FIELD OF THE INVENTION The invention relates to engine-building, in particular, to a plate valve device of a two-stroke internal combustion engine.

A plate valve is known which makes it possible to increase the efficiency of the intake by making it possible to control the plates depending on the engine operation mode.

Also known is an inlet vane valve, which is configured to control the plates depending on the engine operating mode.

The disadvantage of this plate valve is its limited capacity due to the dependence on the vacuum in the crankcase.

The aim of the invention is to enhance the functionality of a plate valve.

This goal is achieved by using a camshaft, the cams of which act on the plate valves and open them to pass the combustible mixture from the carburetor into the crankcase of a two-stroke engine. Thus, as a result of the action of the cams on the plate valves, the functionality of the plate valve is enhanced.

1 shows a plate valve, a longitudinal section; Figure 2 is the same longitudinal section passing through the axis of the camshaft.

Vj

WITH

with about

four

h

The flap valve comprises a housing 1, molded together with an engine crankcase, in which the windows 2 are located, closed by flap valves 3, under which to soften blows against the hull 1 there are plastic gaskets 4, which together with the flap 3 are attached to the housing 1 Inside the housing 1, between the flap 3, there is a shaft 5 with cams 6, which receives rotation from the engine crankshaft and has the possibility of rotation two times slower than the crankshaft.

The valve operates as follows.

When the shaft 5 rotates, the cams 6b overlap the plate valves 3 and bend them, open the passage of the combustible mixture sucked from the carburetor into the crankcase. When running cams b with lamellar

Of the valves 3, they return to their original position, pressing against the body 1 through the plastic gaskets 4.

Claims (2)

1. A flap valve of a two-stroke internal combustion engine, comprising a housing with elastic plates mounted thereon, characterized in that, in order to expand its functionality, it is equipped with a shaft with cams placed between elastic plates with the possibility of acting on them during rotation. 2. The valve according to claim 1, of tl and h a y i and with in that the shaft is kinematically connected to the crankshaft of the engine so as to be rotatable at a frequency less than twice the rotational speed of the crankshaft.