SU1305414A1 - Method for operation of internal combustion engine - Google Patents

Abstract

The invention relates to engine construction and allows for improved fuel economy and engine stability. The operation of the latter is carried out by admitting the depleted mixture into the combustion chamber, and into the prechamber - the enriched mixture with its purging, carried out with a purge ratio of 8-20. The torch of burning gases and chemically active products of incomplete combustion of the precameral mixture is directed into the cavity 3 along the axis to the zone 18, which is remote from the separation protrusion. In this case, the torch of the burning mixture creates an additional movement of the mixture in the cavity 3 ahead of the torch front in the direction of arrow 17, i.e. coinciding with the movement of the flare of burning gases. This leads to the fact that the front edge of the flame front in cavity 3 fits simultaneously to the separating protrusion 2 along its entire length. 2 hp f-ly, 3 ill. & (L / 3/7 I

Description

113054

The invention relates to engine building, in particular, to the organization of working processes in reciprocating internal combustion engines with pre-firing flare ignition,

The aim of the invention is to improve fuel efficiency and engine stability.

FIG. 1 shows a combustion chamber of the engine, top view; Figs. 2-50 diagram of the operation of an engine that implements the method at the moment when the flame of burning gases is ejected from the pre-chamber into the cavity of the part of the combustion chamber communicated with it; in fig. 3 - the same at the moment of approaching the front of the flame in the first part of the combustion chamber to the separation projection.

The internal combustion engine with prechamber and flare ignition contains a crank mechanism 20 (not shown) and a main combustion chamber limited by the cylinder head 1, divided by projection 2 into two cavities, one 3 of which are connected to the prechamber 4 by the tangential channel 5 and Close to the inlet valve 6. The pre-chamber 4 is equipped with a spark plug 7 and an additional inlet valve 8 (not shown) and is made as close as possible to the center of the main -30 volume of the combustion chamber. The second cavity 9 of the combustion chamber is adjacent to the exhaust valve 10.

The axis 11 of the tangential channel 5 intersects the axis 12 of the valves in the middle 35 between the center 13 of the intake valve 6 and the side surface 14 of the inner wall of the first cavity of the combustion chamber.

The method of engine operation is 40 as follows.

The main mixture entering the cylinder at the inlet through the inlet channel 15, attached directional (Fig. 1, counterclockwise) due to the shape of the inlet channel. At the end of the compression stroke, when the combustion chamber is divided into two cavities, in the first cavity 3 (Fig. 2) the directional movement of the mixture is maintained: in the y zone, the prechamber 4 - in the direction of arrow 16, in the zone remote from the prechamber, according to arrow 17. Since the cylinder chamber is a gas exchange unstable gas-dynamic system from the point of view of gas exchange, the chamber is purged with a purge ratio of 8-20. At the same time possible limits of42

The composition of the pre-chamber mixture. The sustained and economical operation of the pre-chamber engine is increased several times.

The enriched mixture in the prechamber 4 is ignited by the ignition plug 7. Burning gases and chemically active products of incomplete combustion of the rich pre-cell mixture are directed into the first cavity 3 along the axis 11 to zone 18, which is remote from the separation projection. At the same time, the torch of the mountain - n (their gases create an additional movement of the mixture in the first cavity 3: ahead of the front of the torch - in the direction of arrow 17, i.e. that the direction of movement of the mixture in the first cavity formed even at the inlet due to the inlet channel 15. The fresh mixture in the first cavity, not yet engulfed by the flame from the flare of burning gases, is shifted from zone 18 to separation protrusion 2. At the same time, the fresh mixture in zone 19 is drawn in by the flare of burning gases following or into the jet of the torch in the direction of the arrow 16. Thus, the creation at the inlet turbulence of the mixture in the first cavity of the combustion chamber in the direction coinciding with the direction of the burning gas plume leads to the fact that the front edge 20 of the flame front of the burning mixture in the first cavity 3 fits simultaneously to the separating protrusion 2 along its entire length (Fig. 3) , providing a powerful ejection of the jet 21 of the fresh mixture and the flame from the first cavity 3 to the second 9 through the gap between the piston bottom and the edge of the separation protrusion 2, while the lean mixture in the second cavity large-scale (more than 250 m / s) is turbulized and ignited in the action of high temperature of the flame 21 substantially throughout the volume of the second cavity 9.

If the axis 11 of the tangential canyos 5 is directed to the center of the first post 3 of the combustion chamber or along the separating protrusion 2, then the additional turbulization of the mixture created by the torch of the burning mixture does not coincide with the movement of the mixture organized by the inlet channel. At the same time, the flame front of the mixture, burning B of the first cavity, does not fit; over time, divide the entire protrusion along the entire length, which drastically reduces the power of the flare of gases ejected from the first 3 into the second 9 cavity, and that ultimately reduces the effectiveness of three-stage combustion.

The implementation of the method of operation improves fuel efficiency and engine stability, improves the stability of the adjustment of the pre-chamber carburetor.

Claims (3)

Formula isotopic 2. The method of pop. 1, from u and with the fact that the gas flow from the prechamber is directed from the separation volume, the cavity communicated 1. The method of operation of the internal combustion engine by inlet into the combustion chamber of the lean mixture and in the form-15. chamber enriched mixture with its purge- 3. The method according to claims 1 and 2, which, compressing the mixture in the combustion chamber G, followed by its mechanical separation into two parts, one of which due to the fact that the mixture inlet into the cavities, with the pre-chamber, creates rotation of the mixture in the direction of movement of the torch enclosed in a cavity communicated with the prechamber igniting the mixture in 54144 the pre-chamber from the spark plug and sequential burning out of the burning flames of both parts of the mixture in the combustion chamber, characterized in that, in order to improve fuel efficiency and engine stability, the pre-chamber was purged with a purge factor of 8-20. 2. The method of pop. 1, which differs from the fact that the flame of burning gases from the prechamber is directed to the volume removed from the separating protrusion, the cavity communicated with the fork. 15 measure. 3. The method according to PP.1 and 2, characterized in that during the inlet of the mixture into the cavities, communicated with the prechamber, create a rotational movement of the mixture in the direction coinciding with the movement of the torch of burning gases. 13 21 2 Fig.Z