CS254928B1

CS254928B1 - Two-stroke engine with suction regulation

Info

Publication number: CS254928B1
Application number: CS86585A
Authority: CS
Inventors: Ladislav Repac
Original assignee: Ladislav Repac
Priority date: 1986-01-27
Filing date: 1986-01-27
Publication date: 1988-02-15
Also published as: CS58586A1

Abstract

Účelom riešenia je predížiť dobu otvorenia sacieho hrdla před hornou úvraťou s eielom zvýšenia výkonu motora. Účelu sa dosiahne tým, že oproti sacieho hrdla valca je na ojnici upravená klapka, oproti ktorej je v dolnej časti piesta vytvořený výřez.The purpose of the solution is to prolong the opening time suction neck before top dead center with performance of the engine. The purpose is it is achieved by opposing the intake neck of the cylinder there is a flap on the connecting rod opposite a cutout is formed in the lower part of the piston.

Description

Vynález rieši dvojtaktný motor s reguláciou nasávania. } \The invention provides a two-stroke engine with intake control. } \

Známe dvojtaktné motory sú konstruované tak, že na otváranie a zatváranie sacie ho hrdla sa využívá piesta motora. Doba otvorenia hrdla před hornou úvraťou je rovnaká s dobou jeho uzatvorenia po překonaní hornej úvrate. Aby nenastalo zpatné vyfukovanie zmesi do sacieho hrdla, toto musí byt umiestnené vyššie k hornej úvrati, čím sa skracuje doba sania zmesi. V iných známých dvojtaktných motorocli sa používá k regulácii sania rotačně šupátko, ktorým je možné predížiť dobu sania zmesi před hornou úvraťou a skrátiť čas sania po hornej úvrati. Takéto konštrukcie sú však náročné na výrobu a vynaložené náklady sú neúměrné k dosahovaným výkonom motorov.The known two-stroke engines are designed in such a way that the piston of the engine is used to open and close the suction port. The opening time of the throat before the top dead center is equal to the time of its closing after the top dead center has been overcome. In order not to blow back the mixture into the suction port, this must be positioned higher to the top dead center, thus reducing the suction time of the mixture. In other known two-stroke motorcycles, a rotary slide is used to regulate the suction, which can increase the suction time of the mixture before upper headland and shorten the suction time after upper dead center. However, such constructions are production intensive and the costs incurred are disproportionate to the engine performance achieved.

Uvedené nedostatky odstraňuje dvojtaktný motor s reguláciou nasávania pozostávajúci z valca, piesta, ojniee a kíukového hriadeťa podťa vynálezu, ktorého podstata spočívá v tom, že oproti sacieho hrdla valca, jeThe above-mentioned drawbacks are eliminated by a two-stroke engine with an intake control consisting of a cylinder, a piston, a drawbar and a crankshaft according to the invention, which is based on the fact that it is

Claims

SUBJECT

Two-stroke engine with intake control, consisting of cylinder, piston, connecting rod and crankshaft, characterized in that a flap is provided opposite the connecting rod, against which a cutout is formed in the lower part of the jaw.

The advantages of the invention reside in the fact that the opening time of the suction branch before the top dead center is prolonged and thus its performance is increased.

An exemplary embodiment of a two-stroke engine according to the invention is shown in the accompanying drawings, in which: FIG. 1 shows a longitudinal section of the engine showing the damper trajectory, FIG. 2 piston with cut-out and fitting into it ^! and FIG. 3 is a working diagram of the engine.

A cut-out 3 is formed at the lower edge of the piston 1, opposite the suction branch 2. A flap 5 is fixedly connected to the connecting rod 4, which moves along the indicated trajectory S. When rotating the crankshaft 7 in the lower part, the flap 5 is inserted into the cut-out 3, at the same time it approaches the wall of the cylinder 3 and closes the suction branch 2. In the wrong movement the procedure is reversed.

a suction port (2) of the cylinder (8) is provided on the connecting rod (4) with a flap (5), against which a cutout (3) is formed in the lower part of the piston (1).