DE2332966A1 - INCLINED CHANNEL BURNER INSERT AND DIESEL ENGINE EQUIPPED WITH IT - Google Patents

Description

PERKINS EFGIIES LIMITED, London, England

concerning

Inclined duct burner insert and diesel engine equipped with it

The invention relates to inclined channel burner inserts for internal combustion engines operating with pressure ignition which hereinafter referred to as "diesel engines" for short.

It is common practice in diesel engines to use inclined duct burner inserts To be used in conjunction with antechamber when using a diesel engine with indirect fuel injection is operated to reduce the smoke emitted by the engine during operation. It is true that in the U.S.A. patent 3 456 627 describes a particularly advantageous embodiment of an inclined channel burner insert when it is used smoke output decreases, but it has been found that it is desirable to keep smoke output down to a minimum to reduce.

The invention is based on the object for use in connection with a diesel engine a sloping duct burner insert to create, which makes it possible to reduce the smoke emission of a diesel engine in comparison to known Sclirägkanalbrennereir: - sätzeri further and preferably to a minimum.

3098 32/069 L.

To solve this problem, the invention is a Diesel engine has been created which has a piston, a cylinder and a cylinder head with a combustion chamber or an antechamber, which is closed at one end by a sloping channel burner insert, which has a bottom section, furthermore an upwardly projecting in the circumferential direction relative to the upper side of the bottom section extending portion, one in the bottom portion close to the one extending in the circumferential direction Portion formed inlet opening and one in the extending in the circumferential direction portion in the vicinity of the inlet opening formed outlet opening, both openings to serve to connect the interior of the antechamber to the outside of the antechamber; this is the top of the bottom section provided with a channel having a base extending in the longitudinal direction of the channel substantially extends parallel to the underside of the bottom portion.

The outlet opening is preferably in alignment with an inclined, diverging passage formed in the cylinder head of the diesel engine and in the vicinity of an intake valve and an outlet valve opens.

Thus, an inclined channel burner insert according to the invention has for installation in the cylinder head of a diesel engine on a bottom section, and also one opposite the top of the bottom portion upwardly extending in the circumferential direction portion, one in the bottom portion formed near the portion extending in the circumferential direction inlet port, one in which in the Circumferentially extending portion formed, the inlet opening adjacent outlet opening and one in the Top of the bottom section formed channel with a base that is substantially parallel to the bottom of the bottom section runs in the longitudinal direction of the channel.

0 9 Γ Ά 7/069 /:

The base of the channel is preferably flat and the channel is aligned with the outlet opening.

The invention and advantageous details of the invention are shown below with reference to schematic drawings an exemplary embodiment explained in more detail. It shows:

Pig. 1 shows a vertical partial section through a diesel engine;

Pig. 2 part of the underside of the cylinder head of the Diesel engine according to Pig. 1;

Pig. 3 the top view of an embodiment of a sloping channel burner insat ζ e s j

Pig. 4 the inclined duct burner insert according to Pig. 3 when viewed in the direction of arrow IV in Pig. 3;

Pig. 5 shows a section along the line V-V in Pig. 3;

Pig. 6 shows a perspective illustration of an inclined channel burner insert;

Pig. 7 shows a graphical representation for comparison purposes with curves characterizing the operating behavior, for a diesel engine with a sloping channel burner insert according to the invention or for a diesel engine with a Inclined duct burner insert of known type apply; and

Pig. 8, for comparison purposes, is a graph with a further set of performance characteristics Curves showing the effect of an additional delay in injection in a diesel engine with an inclined duct burner insert illustrate according to the invention.

In Pig. 1 shows part of a diesel engine 1 with a cylinder block 2, a piston 3 and a cylinder head 4. The cylinder head 4 has an antechamber 5 which is closed off by an inclined duct burner insert 6,

3098 82/069 /,

which according to Pig. 3 Ms 5 one protruding upwards, has portion 7 extending in the circumferential direction.

According to FIG. 3, the inlet opening 10 of the burner insert 6 in plan has a generally rectangular shape with rounded ones Ends, and according to Pig. 4, the outlet opening 12 also has a rectangular cross-section in the side view, the upper boundary surface 13 of the outlet opening from the radially further inner surface 7a of the section 7 from in the direction of the radially further outer surface 7b of the section 7 in the direction of the bottom 8 of the burner insert is inclined.

A channel 14 formed in the bottom 8 penetrates the inlet opening 10 in a diametrical direction in the vicinity of the Outlet opening 12. The bottom 15 of the channel 14 runs essentially parallel to the underside of the burner insert and is closer to this underside than the upper boundary surface 13 of the outlet opening 12. That of the inlet opening 10 facing away from the end of the channel 14 merges into the bottom 8 and the section 7 extending in the circumferential direction so that there is a smooth transition between the channel on the one hand and the bottom 8 and the peripheral section 7 on the other hand. The side walls 16 of the channel 14 can either extend at right angles to the bottom 15 of the channel or against the Bottom be inclined, and the transition between the side walls 16 and the bottom 15 can either be sharp or pronounced preferably be provided with a small fillet. Preferably, the bottom 15 of the channel also extends in the transverse direction parallel to the underside of the burner insert 6. The outlet opening 12 is according to Pig. 2 on one in the cylinder head 4 formed inclined channel 18, which is fishtail-shaped in a known manner and in the cylinder of the Diesel engine in the vicinity of the inlet and outlet valves 19 opens.

From the in Pig. 7 reproduced curves it can be seen that the burner insert 6 according to the invention in Yergleic:

3 0 9 £ '? 2/0 P 9 / ₊

to known burner inserts for a lower specific fuel consumption, based on the braking power, a lower exhaust gas temperature and a reduced smoke content of the exhaust gases, all of these effects being desirable while the power of the engine remains essentially unchanged within the normal speed range.

From the curves shown in Fig. 8 it can be seen that that the use of the burner insert according to the invention in connection with a delay in the injection time causes the smoke content of the exhaust gases to decrease progressively, while the engine torque, the specific Fuel consumption, exhaust gas temperature and fuel delivery remain essentially constant.

All information and features disclosed in the documents, in particular the disclosed spatial design, are as far as they are individually or in combination new compared to the state of the art, claimed as essential to the invention.

Expectations; 3 Cn: · '2/0 6 9 h

Claims (7)

AIS REQUIREMENTS 1. For use in conjunction with the cylinder head eires Diesel engine specific inclined duct burner insert with a bottom section, one extending upward from the top of the sod section, in the circumferential direction extending portion, an inlet opening formed in the bottom portion near the peripheral portion and one in the peripheral portion near the inlet opening formed outlet opening, characterized in that the bottom section (8) is provided on its upper side with a channel (14) which has a base (15) which essentially runs parallel to the underside of the bottom portion in the longitudinal direction of the channel. 2. Inclined channel burner insert according to claim 1, characterized characterized in that the base (15) of the channel (14) is flat. 3. Inclined channel burner insert according to claim 1 or 2, characterized in that the channel (14) on the outlet port (12) is aligned. 4. Inclined channel burner insert according to one of claims 1 to 3 »characterized in that the Channel (14) extends over the top of the bottom portion (8) and diametrically opposite the outlet opening (12) in the Circumferential section (7) passes. 5. Diesel engine with one piston, one cylinder and one Cylinder head, in which the cylinder head has a combustion chamber or an antechamber, which at one end by a Inclined channel burner insert is completed, which has a bottom portion, further one of the top of the bottom portion from protruding upwards, running in the circumferential direction Section, one in the bottom section near the U ::: ~ Entrance section formed inlet opening and one in the Circumferential portion near the inlet opening formed outlet opening, and in which these two openings the interior connect the prechamber to the outside of the prechamber, characterized in that the top des .Bodenabschnitts (8) is provided with a channel (14) which has a base (15) which is substantially parallel runs to the bottom of the bottom portion in the longitudinal direction of the channel. 6. Diesel engine according to claim 5 »characterized in that the outlet opening (12) of the inclined duct burner insert (6) is aligned with an inclined, divergent channel (18) formed in the cylinder head (4) and ends in the vicinity of an inlet valve (19) and an outlet valve (19). 7. Diesel engine, characterized by a sloping channel burner insert (6) according to one of claims 1 to 0 ^ '· ? ! 0 G 9 U