JPS6228291B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a supercharged internal combustion engine, which (a) has a compressor driven by an exhaust gas turbine, (b) has a supercharged air cooler, and ( c) a differential user connected to the compressor outlet, the differential user opening into a connection chamber connecting the compressor outlet to the supercharged air cooler inlet; (d) the supercharged air cooler connected to the exit of
The invention also relates to a type of engine having a charge air line which is integrated into the cylinder block of the internal combustion engine, from which the intake channels branch off into the individual cylinders.

A supercharging air system of the above type, in which the differential user connected to the outlet of the compressor provided on one end side of the engine comprises a casing having a large chamber volume provided on the same end side of the engine. Designs are known which open into a connection chamber which is connected to the inlet of a downstream charge air cooler which is also located on the same end side of the engine. After leaving the charge air cooler, the charge air stream is fed via a connecting line to a charge air line integrated in the cylinder block and open towards the cylinder wall, from which the The intake passage branches into individual cylinders.

Such supercharged air systems have the following drawbacks. This means that a relatively large vessel must be constructed as a connection chamber in order to achieve the flow conditions required for the cooler load, in other words a chamber as large as possible must be constructed behind the compressor outlet or behind the differential user. shall be constructed to provide as uniform a velocity distribution as possible at the cooler inlet.

Such a connection chamber with a cooler and downstream connection lines is expensive and requires a very large amount of space, which leads to an increase in size in the case of internal combustion engines. In addition, the large areas of the outer walls of the casing of the connection chamber, the cooler and the conduit connections are extremely susceptible to vibration, and the high-frequency vibrations transmitted from the supercharger can significantly increase the noise level of the internal combustion engine. arise.

Yet another drawback is that the cooler inlet is still too small to provide the necessary cooling performance, which makes the cooler expensive to manufacture. This is because if the cooler inlet is relatively small,
This is because the cooling pipe must be equipped with an extremely large number of cooling thin plates.

The object of the invention is to enable the use of a cooler that does not require a casing device that requires high production costs, a connection chamber, a supercharged air cooler and a conduit connection of a supercharged air conduit, and that can be produced at low cost. The object of the present invention is to provide a supercharged air system that requires little space.

According to the present invention, in the supercharged internal combustion engine of the type mentioned at the beginning, (e) the connection chamber and the supercharged air cooler are arranged inside the cylinder block, and (f) the connection chamber is located inside the cylinder block. connected to the compressor outlet on at least one side of the liner; (g) a supercharged air cooler connected to the connection chamber on the other side of the row of cylinder liners; , is solved in that the two connecting chamber sections, which are arranged on both sides of the row of cylinder liners, communicate with one another via an intermediate chamber between the cylinder liners.

The above configuration further has the following advantages.
That is, hot, uncooled supercharging air surrounds the lower region of the cylinder liner, which has a lower temperature (approximately 50-60°) compared to the upper region of the cylinder liner located in the combustion chamber. (approximately 160°) flows, which heats the cylinder liner wall,
The thermal stress strain inside the cylinder liner is eliminated.

According to an advantageous embodiment of the invention, the connection chamber comprises walls forming the cylinder block, ie lateral outer walls;
two end walls, the wall closing off the crank chamber from above, the upper wall and the wall receiving the cooling medium surrounding the area to be cooled of the cylinder liner, as well as penetrating the cylinder block; It is surrounded and formed by the cylinder liner wall.

It is advantageous if the charge air cooler can be inserted into one end wall of the cylinder block and extends towards the opposite end wall. In this case, the following advantages can be obtained.
This means that the supercharge air cooler inlet can be manufactured more cheaply than compact coolers with a relatively small inlet, i.e. long and elongated superchargers that require only a few cooling medium guide tubes to be passed through the individual cooling plates. Air coolers can be used.

According to one advantageous embodiment, the charge air cooler is removably fixed on its end wall and is supported in the cylinder block in the form of a drawer on a guide member. In this case, the cooler can be easily removed for maintenance (cleaning) purposes.

According to a further advantageous embodiment of the invention:
A charge air cooler divides the chamber between the cylinder block outer wall and the cylinder liner into two separate chambers, one of which, on the side of the upper wall of the cylinder block, is connected to the charge air conduit. , and an intake passage branches from this point by penetrating the upper wall of the cylinder block.

It is advantageous for the compressor outlet to open into the upper wall of the cylinder block, so that
It is possible to install an elongated differential user with a satisfactory degree of expansion for pressure regeneration.

The invention will now be described with reference to the accompanying drawings.

FIG. 1 shows a cylinder block 1 arranged on a crankcase 3 containing a crank chamber 2 of an internal combustion engine. A cylinder liner 4 is arranged in the cylinder block 1, the lower end of which is held by a wall 5 that closes off the crank chamber 2 from above, and in the upper region a wall 6 for receiving the cooling medium. surrounded and held by A cylinder head 8 having an intake passage 7 and a supercharging air compressor 9 driven by an exhaust turbine (not shown) are arranged on the cylinder block 1.
This compressor outlet 10 opens into the cylinder block 1 via a compensating element 11 with a differential user 12.

The cylinder block 1 has two side outer walls 13,
14, two end walls 15, 16, and a crank chamber 2
A wall 5, an upper wall 17, and a wall 6 that close the
The upper wall 7 is provided with holes for an intake passage 7, a cylinder liner 4, and a compressor outlet 10. A guide member 18 is formed between the side outer wall 14 and the wall 6, which allows the cooler 1 to extend between the end walls 15 and 16.
9 is retained.

The chamber above the cooler 19 from which the intake channel 7 branches forms a charge air conduit 20 , whereas the chamber open on the opposite side of the cooler 19 forms a connecting chamber 21 .

During operation, supercharged air heated based on compression in the compressor 9 is transferred to the connection chamber 21 via the differential user 12.
is guided into the right-hand section of the cylinder liner 4 and is quenched here. The upper left side of this connection chamber section is closed off and delimited by a wall 6.
The charge air passes between the lower region of the cylinder liner 4 into the left-hand section of the connection chamber 21 in the figure and flows into the inlet 22 of the charge air cooler 19 . in this case,
The high-temperature supercharged air flowing through the cylinder liner 4 heats the relatively low-temperature end of the lower region of the cylinder liner, which in turn creates a connection between this end and the high-temperature side of the cylinder liner, the combustion chamber side. Thermal stresses between the cylinders are balanced and compensated, so that the risk of operational disturbances due to deformation of the cylinder liner is avoided. At the same time, the hot supercharged air already releases a certain amount of heat before reaching the supercharged air cooler 19.

The supercharged air is further supplied to an inlet 22 of the supercharged air cooler 19 extending from the end wall 16 to the opposite end wall 15.
pass through. This is particularly advantageous in that a supercharged air cooler can be used which is relatively inexpensive in terms of manufacturing technology. Compared to known charge air coolers with a relatively small flow cross section, a long charge air cooler requires correspondingly fewer cooling medium guide tubes for the same cooling plate area. This is because all you have to do is pass it.

The chamber formed between the compressor outlet 10 and the supercharged air cooler inlet 22 has a significantly large volume, which effectively drains the supercharged air leaving the supercharged air compressor 9. sedation, thereby loading the cooler 19 with a uniform low-velocity supercharging air flow over the entire cooler inlet surface 22, thereby making it possible to utilize the cooler with perfect efficiency. It has sufficient size.

After passing through the cooler 19, the supercharging air passes through the supercharging air conduit 2, which is also integrated into the cylinder block.
From there, it is further supplied to the cylinder via the intake passage 7. The right side of the charge air conduit 20 is closed off and delimited by a wall 6.

FIG. 2 shows a further embodiment of a supercharged air cooler 19 with two separately arranged cooler elements 23 connected by a partition 24 closing a connecting chamber 21. be. The individual cooler elements 23 are in this case connected to the cooling medium circuit by supply and return conduits 25 passing through the upper side of the partition 24.

This embodiment with individual cooler elements has the advantage that one or more standardized unit coolers can be used, independent of the number of cylinders of the engine in which the charge air cooler is equipped. have.

The inventive configuration of the cooler 19 not only facilitates replacement and cleaning due to the fact that the cooler is removably fastened to the end wall, but also allows this cleaning to be carried out in conjunction with maintenance work on other engine elements. If the cylinder cover is removed, this has the advantage that this can be done without removing the cooler. In this case, the cooler can be easily cleaned, for example by supplying compressed air in the opposite direction through the holes in the top wall 17.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a cross-sectional view of the essential part of the present invention of a supercharged internal combustion engine, and FIG. 2 is a cross-sectional view of an embodiment of a supercharged air cooler. FIG. 1...Cylinder block, 2...Crank chamber,
3...Crank case, 4...Cylinder liner,
5... Wall, 6... Wall, 7... Intake passage, 8... Cylinder head, 9... Supercharged air compressor, 10...
Compressor outlet, 11... Compensation member, 12... Differential user, 13, 14... Side outer wall, 15... End wall,
16... End wall, 17... Upper wall, 18... Guide member, 19... Cooler, 20... Supercharged air conduit, 2
DESCRIPTION OF SYMBOLS 1... Connection chamber, 22... Inlet surface, 23... Cooler element, 24... Partition wall, 25... Supply and return conduit.

Claims (1)

[Claims] 1. A supercharged internal combustion engine, which includes (a) a compressor 9 driven by an exhaust gas turbine;
(b) It has a supercharged air cooler 19, and (c) It has a differential user 12 connected to the compressor outlet 10, and the differential user 12 is connected to the compressor outlet 1.
(d) connected to the outlet of the supercharged air cooler 19 and connected to the cylinder of the internal combustion engine; It has a supercharging air conduit 20 integrated into the block 1,
In the type in which the intake passage 7 branches from the supercharging air conduit 20 to each cylinder, (e) the connection chamber 21 and the supercharging air cooler 19 are arranged inside the cylinder block 1. (F) The connection chamber 21 is connected to the compressor outlet 10 on at least one side of the cylinder liner 4, and (G) The connection chamber 21 is connected to the compressor outlet 10 on the other side of the row of cylinder liners 4.
(h) Both connection chamber sections of the connection chamber 21 arranged on both sides of the row of cylinder liners 4 are arranged in an intermediate chamber between the cylinder liners 4. A supercharged internal combustion engine, characterized in that the engines are in communication with each other via. 2. The walls where the connection chamber 21 constitutes the cylinder block 1, that is, the side outer walls 13, 14, the two end walls 1
5, 16, by the wall 5 closing the crank chamber 2 from above, by the upper wall 17 and by the wall 6 which receives the cooling medium and which surrounds the area to be cooled of the cylinder liner 4, as well as by the cylinder block 1. A supercharged internal combustion engine according to claim 1, characterized in that the engine is surrounded by a wall of a cylinder liner 4 that passes through the cylinder liner. 3. A supercharged internal combustion engine according to claim 2, wherein the supercharged air cooler 19 is insertable through one end wall 16 of the cylinder block 1 and extends between the end walls 15,16. 4. A supercharged air cooler 19 is removably mounted on one end wall 16, and within the cylinder block 1 a guide member 18 is installed in the form of a drawer.
A supercharged internal combustion engine according to claim 3, which is supported by: 5 The supercharged air cooler 19 divides the chamber between one side outer wall 14 and the cylinder liner 4 into two separate chambers, and of the two chambers, the chamber on the upper wall 17 side is 5. The supercharged internal combustion engine according to claim 4, wherein a supply air conduit 20 is formed, and an intake passage 7 opening in the upper wall 17 branches off from the supercharge air conduit 20. 6. Supercharged internal combustion engine according to claim 5, in which the supercharged air cooler 19 consists of individual cooler elements (23) connected by a partition (24) which closes off a connection chamber (21). 7. Supercharged internal combustion engine according to claim 6, in which the individual cooler elements 23 are connected to the cooling medium circuit by cooling medium supply and return conduits 25 passing over the partition wall 24. 8. A supercharged internal combustion engine according to claim 2, wherein the compressor outlet 10 opens in the upper wall 17 of the cylinder block 1.