SU1204759A1 - Internal combustion engine with loop scavenging and spark ignition - Google Patents

Description

The invention relates to mechanical engineering, specifically to engines with two-stage combustion, and can be applied to two-stroke engines with loop blowing.

The purpose of the invention is to increase the rate of combustion of the combustible mixture.

FIG. 1 shows a two-stroke engine with a combustion chamber; in fig. 2 is a view A of FIG. 1 (bottom of the camera); in fig. 3 is a section bb nor fig. 2; in fig. 4 - combustion chamber (engine piston located in BMTJ section,. J

The engine contains a candle cavity 1 formed by a curved surface located along the radial axis of the cylinder head 2 along the direction of the purge and two endless cavities 3 and 4 located also along the direction of the loop loop on both sides of the candle. The engine also contains a cracker 5, a spark plug 6, a piston 7, it is 8 and 9 in the cylinder, a partition 1, a gap 11 between the partition and a piston at TDC.

The volume of the cavity of the candle should be 40-60% of the total volume of the combustion chamber. In this case, the candle cavity, in order to form a displacer, must be shifted to the inlet ports. The gap between the septum and the piston is 0.5-1 mm.

The engine works in the following way.

When purging the air-fuel mixture rises and, repeating the profile of the combustion chamber, blows through its cavities, displaces the exhaust gases through the exhaust ports of the cylinder. After closing the windows, when

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When the piston moves upwards, the working mixture is compressed and the displacer feeds it into the cavities of the combustion chamber. With the passage of the piston zl 6-12 to

5 TDC, the volume of the combustion chamber is practically divided into two cavities, at which time the working mixture in the candle cavity is ignited with the help of a candle. After reaching a certain

The pressure of the torch of burning combustion products from the candle cavity breaks into the eternal ones and leads to an accelerated ignition of the mixture in these cavities. Combustion of the mixture in

The 15 eternal cavities are approaching volume due to large-scale turbulisacin. When blowing under the most favorable conditions, there is a candle cavity, which is just

20 and necessary. At the same time, due to the spatial wedge created by the displacer and the piston, the main part of the fresh charge is first also directed into the candle cavity, which

25 provides a better composition of the mixture in it and additionally turbulizes the mixture at the moment of flame generation, which intensifies the combustion process in the candle cavity.

30 The perimeter of the breakthrough of gases from the cavity of a candle into a backless one has increased, FIG. 2; In addition, since the total volume of the eternal cavity is divided into two Smaller ones, and the ignition of the mixture in them with hot gases from the cavity of the candle cavity occurs simultaneously, the mixture is burned at a lower crankshaft angle, for example,

40, O

The combustion of the mixture occurred in 16, whereas in the prototype in 22-28.

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Phage.Z

Editor M.Tovtin

Sostavit.l S. Berezin Tehred O. Vashchishina

8503/32

Circulation 537Subscribe

VNIISH State Committee of the USSR

for inventions and discoveries 113035, Moscow, .ZH-35, Pa plska nab, d.4 / 5

Branch PPP Patent, city 5 Design, L

Proofreader A. Obruchar

Claims (1)

INTERNAL COMBUSTION ENGINE WITH HINGE BLOWING AND SPARK IGNITION, containing inlet and outlet windows located on opposite sides of the cylinder, and a combustion chamber formed by the piston and cylinder head, wherein the candle part of the chamber with the spark plug and the spark plug placed therein is made part, separated from one another by means of partitions, forming a gap with the piston when it is in top dead center position, which means that, in order to increase the rate of combustion of the combustible mixture, Naya portion is formed as a cavity placed in the central portion of the head and bessvechnaya part is made in the form of two cavities' arranged symmetrically on .obe side of the spark plug cavity, all cavities are elongated and disposed in a direction from the inlet ports to the outlet.