DE516657C - Injection engine with self-ignition - Google Patents

Description

Compression-ignition injection engine The invention relates to a Injection engine with compression ignition, the cylinder space of which has a throttle cross-section is connected to a chamber, which is preceded by a funnel-shaped space, into which the fuel injection at the end of the compression stroke against the Throttle point begins.

In the known engines of this type, the nozzle injects the fuel jet in the direction of the insertion axis of the nozzle holder into the funnel. Nozzle and Holders are therefore essentially coaxial with the funnel and the one behind it Chamber arranged. However, this assembly is difficult in many cases carry out because often the installation of the holder with nozzle or the chamber is right cumbersome and bulky, so that either the available space to accommodate of inlet and outlet ducts and valves including their control organs, auxiliary starting devices, Measuring and display bores quite limited or the flow conditions quite right become unfavorable. In many cases these difficulties can be avoided if according to the invention it is ensured that the injection jet is known per se Way at a right or approximately right angle to the insertion axis of the nozzle holder exit.

This also has the advantage that of the funnel-shaped Space developing flame, which is directed out of the chamber during the working stroke The air flow blows out of the funnel like a stick flame, a smaller one and In addition, the part of the nozzle body that is less sensitive to animal influences is taken directly than with the known type mentioned, where the flame against the entire face, mostly containing the precisely machined nozzle needle seat of the nozzle body rebounds.

The drawing shows five exemplary embodiments of the subject matter of the invention shown.

Fig. I shows the first in a longitudinal section through a cylinder and piston Example, where the nozzle holder including the nozzle in the upper edge of the cylinder jacket and the funnel including the chamber are arranged at an angle on the edge of the cylinder cover.

In Fig. 2 the second example is given in the same type of representation, that differs from the first mainly in the arrangement of the nozzle holder and the Nozzle differs.

Fig. 3 shows the third embodiment in longitudinal section and Fig. 4 in side view. The nozzle holder with nozzle is tangential in the cylinder jacket .inserted, and the chamber axis is parallel to the cylinder axis.

In the fourth embodiment according to Fig. 5, both the nozzle holder with nozzle as well as the funnel and the chamber are arranged on the cylinder cover.

Figs. 6 and 7 show the fifth embodiment in two order Longitudinal sections offset from one another by 90 °. In contrast to the @ 4er In the first examples, the chamber and the funnel space are housed in the flask.

In all examples, the cylinder is marked with .a, the cylinder cover with b and the piston shown in its inner dead position is denoted by e. The reference symbol il indicates the holder of the injection nozzle and the nozzle the symbol: e.

In the first example according to Fig. I, the nozzle holder ä protrudes completely the proximity of the upper edge of the cylinder vertically through the cylinder wall in into the path of piston c, which is correspondingly recessed at f. The injection point .e of the nozzle is arranged so that the fuel jet is approximately perpendicular to the Insertion axis of the nozzle holder in one on the cylinder cover b, in the vicinity the nozzle mouth and the upper cylinder edge arranged funnel space g directed into it is. The narrowest point h of the funnel forms a narrow channel that forms the cylinder space connects to a chamber i via the funnel. The widest funnel cross-section goes directly into the cylinder space without any intermediate channel, so that the Flow processes can take place unhindered. The chamber and the funnel are arranged in such a way that they are directed out of them during the working stroke hot flow is directed obliquely into the cylinder space and is even distributed because it does not act vertically on the walls of the cylinder space, but brushes past the walls. By arranging the nozzle holder and nozzle and the chamber including the funnel, so to speak, in a corner of the upper edge of the cylinder In particular, the space required for the valves and their ducts remains completely free.

The second example according to Fig. 2 differs from the first in the Mainly only through the slightly different installation of the nozzle holder that supports the nozzle. While it protrudes there into the piston raceway and is therefore strongly heated, In the second example, it is protected behind a protective wall k, which is however like this is arranged to allow direct injection of the nozzle into the funnel g not disabled. Compared to the first example, this also has the advantage that that the piston and thus the whole engine is lower because the recess disappears in the piston and consequently the piston rings moved closer to the piston crown can be.

In the third embodiment according to Figures 3 and 1, the holder is including the nozzle arranged tangentially in the cylinder. Otherwise this example is different hardly from the previously described. In the fourth embodiment according to Fig. 5 is the insertion axis of the nozzle holder: d parallel to the cylinder axis in the cover and the Funnel g including chamber i arranged on the side of the lid. In addition, there still protrudes a glow wire plug m iii the funnel g into it, which is electrically heated when starting will.

Instead of the chamber on the cylinder, as in the examples shown to arrange, you can also, like the fifth embodiment according to Fig. 6 and 7 shows, accommodate in the flask.

It has already been highlighted several times and also goes out of the various Illustrations clearly show that through the novel joining of the individual known individual features a compact, simple design can be achieved. Moreover, with the new design, harmful spaces can be largely eliminated in the cylinder avoid, so that the requirement often made on engines of the specified type, Getting as much air as possible into the chamber during the compression stroke is easy can be fulfilled.

Claims (6)

PATENT CLAIMS: i. Injection engine with compression ignition, its cylinder rail is connected via .ein throttle cross-section with a chamber, which is a funnel-shaped Upstream space is into which the fuel injection at the end of the compression stroke begins towards the throttle point, characterized in that the injection jet in a manner known per se at a right or approximately right angle to the insertion axis of the nozzle holder emerges. 2.- Injection engine according to claim i, wherein the chamber is arranged on the cylinder, characterized in that the nozzle in the upper edge of the cylinder, namely perpendicular to the cylinder axis, while the The funnel and the chamber are located on the cylinder cover (Fig. I to q.). 3. Injection engine according to claim 2, characterized by such an arrangement of the funnel and the Chamber on the cylinder cover that the animal-oriented from the chamber and the funnel Flow is directed obliquely into the cylinder space (Fig. I and 2). ¢. Injection engine according to claim 2, characterized in that the nozzle protrudes into the cylinder space and the piston is recessed accordingly at this point (Fig. i). 5. Injection engine according to claim z, characterized in that the nozzle is expedient parallel to the cylinder shaft in the lid and the funnel including the chamber on the side of the lid is arranged (Fig. 5). 6. Injection engine according to claim r, characterized in that that the nozzle holder and the nozzle attached to it only at the nozzle mouth in free Connection with the cylinder chamber is established (Fig. 2 and 3).