DE2156704A1 - Water-cooled internal combustion engine with a charger - Google Patents

Description

Patent Attorneys -

Dr-Ing. Wilhelm Reichel • DipL-Ing. Wolfgang Reichel

6 Frankfurt a. M. 1 6891

Parkstrasse 13 '■' -——

EUGLISH ELECTRIC DIESELS LIMITED, .Fewton-le-Willows, Lancashire, England

Water-cooled internal combustion engine with a charger

The invention relates to a water-cooled internal combustion engine with a supercharger or supercharger, 'for example a turbocharger, from the exhaust gas of the internal combustion engine is driven and the inlet line supplies air under pressure. ■.

It is known to cool the charger of an internal combustion engine with water. In the known arrangements, however, is the cooling water circuit of the charger is separated from that of the actual internal combustion engine. This leads to a complicated and expensive cooling water arrangement. It is also known to use the discharge line of an internal combustion engine to cool with water, and for example using a common water pump the cooling water circuit of the to connect the actual internal combustion engine with that of the exhaust line in parallel.

The object of the invention is to provide an integrated one for a water-cooled internal combustion engine with a charger To create water cooling arrangement.

209821/0723

■■ '- 2 -

For this purpose, a water-cooled internal combustion engine with a charger according to the invention is characterized in that at least part of the cooling water of the internal combustion engine cools the charger and successively through the Internal combustion engine and the charger flows.

In a preferred development of the invention, the charger is designed as an exhaust gas turbocharger and the outflow line The internal combustion engine is designed in such a way that the exhaust gases are fed from the discharge line to the turbocharger and the outflow line is cooled by the cooling water of the Brennfe engine, at least part of this Cooling water is supplied to the turbocharger, so that 'the cooling water successively the internal combustion engine, the discharge line and flows through the turbocharger.

A preferred embodiment of the invention is described with reference to figures.

The Pig. 1 is a partial section through one after the

Invention trained diesel engine with a turbocharger.

_ The Pig. Figure 2 is a view of a water cooled vent ™ line arrangement of the in the pig. 1 shown

Motor, the exhaust duct openings with

connected to the turbocharger.

The Pig. 1 shows an eight-cylinder V-diesel engine 11 with a charger in the form of an exhaust gas turbocharger 12 * The turbocharger__12 ~ contains air inlets 13 and 14 and an outlet "channel 15 through which the turbocharger air is under pressure the inflow lines 16 of the internal combustion engine and thus the inflow openings 1.7, two of which are shown are.

. ../3 209821/0723

Each cylinder of the diesel engine has an outflow opening 18. The outflow openings are via connecting pieces 19 connected to outflow channels, which belong to a water-cooled exhaust pipe arrangement 20, which In the Pig. 2 is shown on a larger scale. There are four "Aissirömkanäle 21, 22, 23 and 24 zu ~ se" ßen "r-A-n - each of these Outflow channels are each connected to two outflow openings 18 of two cylinders of the diesel engine. With these Both cylinders are the opposite cylinders on both sides of the V-engine. At the ends opposite the outflow openings 18, the four channels run vertically upwards through the Top of the outflow arrangement 20 and are connected to four parallel turbine inlet openings 25 (Fig. 1), so that the exhaust gases of the diesel engine 11 drive the turbocharger 12, before they flow off through an exhaust outlet at the upper end 26 of the turbocharger.

The two cylinder blocks and cylinder heads of the diesel engine 11 _ .. are equipped with internal cooling water spaces 27, their upper ends surround the outflow openings 18. The cooling water is supplied to the spaces 27 in a conventional manner (not shown). Near each outflow opening 18, the cylinder heads have cooling water outlets that are connected via connecting pieces 28 are connected to an interior 29 of the outflow arrangement 20 f, through which the outflow channels run. In this way, all of the cooling water, when it leaves the diesel engine 11, flows through the interior 29 of the outflow arrangement 20 to cool the outflow channels 21, 22, 23 and 24. ·

The top of the outflow arrangement 20 has three cooling water outlet openings 30, 31 and 32 (Fig. 2), of which the outlet openings 30 and 31 to a cooling water inlet device (not shown) of the turbocharger 12 are connected.

../4 209821/0723

The cooling water fed to the turbocharger in this way for cooling purposes leaves the turbocharger through a cooling water outlet line 33 (I ¹ Ig Engine is being cooled. As a result, only part of the cooling water is sent through the turbocharger. The other part of the cooling water leaves the outflow arrangement via the outlet opening 32 and from there reaches the cooler directly.

Apart from the exhaust gases for the drive and the cooling water for cooling, the turbocharger does not receive one from the diesel engine illustrated channel oil for lubrication purposes. In the embodiment shown, a channel 34 is provided through which the oil flows back from the turbocharger to the engine. As can be seen, the channel 34 leads through the outflow arrangement 20. The channel 34 leads directly to a space 35 between the two, the cylinder blocks of the engine. This space contains the crankshaft (not shown). The room 35 (Pig. 1) is with a plate 36 covered which has an opening (not shown) to which the lower end of the channel 34 via a Connector 37 leads. The oil supply to the turbocharger can be the same as the oil return flow via a channel take place, which is similar to the channel 34 and which is connected with its inlet end to the oil supply device of the engine is. In the illustrated exemplary embodiment, however, the oil supply to the turbocharger is simpler Way provided by a separate Ölzuifuhrleitung (not shown) from the oil pump of the Engine leads directly to the turbocharger «,

The described embodiment of the invention is characterized through an extremely compact and simple structure who ensures that dLi © engine exhaust gases dem

209821/0723

+ 56-7114

Turbocharger are supplied that not only the engine, but also the AusstrÖmanordnung and the turbocharger through a single cooling water circuit are cooled and that the turbocharger is fed from the engine oil, which then again returns to the engine. The compact and simple structure leads to a considerable weight saving of the whole Internal combustion engine.

Although the embodiment of the invention is concerned with a V-engine, the measures according to the invention are also Applicable to other types of engines, for example also to "in-line engines". .__

Until now it was not common for one with a turbocharger equipped internal combustion engine to provide water cooling of the exhaust or exhaust lines. The high Temperatures to which air-cooled exhaust pipes are exposed have led to numerous difficulties in practice:

a) a gradual increase in the material of the exhaust pipes during operation, unless the exhaust pipes exist made of steel with a high content of nickel, which is, however, very expensive;

b) the difficulty of having exhaust pipes made of a steel a high Mckel content in the form of a discharge or Integrate exhaust assembly;

c) the relatively strong expansion or contraction of the exhaust pipe or exhaust manifold, which occurs as a result of repeated expansion and contraction when alternating Operation of the engine for a certain ■ period of time leads to a gradual loosening of fasteners

209821/0723

and tiring of necessarily intermediaries Expansion compensation elements, for example from bellows cables Expansion connectors, leads;

d) a relatively high heat radiation in the Engine compartment and the surrounding area.

In a preferred embodiment of the invention, in which the cooling water for the engine and the turbocharger in one integrated arrangement is also used to cool the outflow lines, these difficulties are largely eliminated. So the temperature of the exhaust manifold is lowered enough that the exhaust manifold from cheaper and more suitable materials can be made, for example aluminum alloys or cast iron, which are cast without significant long-term growth of these materials. As a result of the degraded Temperature range to which the manifold is exposed, thermal expansion and contraction are also lower and comparable with the corresponding values of other engine parts, so that one can without bellows-like expansion connectors can get along. The arrangement of the exhaust pipes in the form of an integrated exhaust arrangement further reduces the number of connections required to a great extent, In addition, since the connections are no longer exposed to extreme temperatures, the previously occurring Disturbances avoided. The lower temperature of the exhaust assembly surrounding water jacket and the fact that the 'heat from the exhaust or vent assembly passes through the cooling water is supplied to the engine radiator, mean that the heat given off to the environment is significantly lower than with the known arrangements ..

209821/0723

Since in the outflow arrangement 20 shown, all exhaust lines are integrated in a single arrangement, the total number of individual engine parts "becomes" considerable reduced, which is also reflected in a shorter assembly time. The cooling water connections 28 in simple way on the exhaust assembly 20 and the cylinder heads of the engine ". The exhaust duct connectors 19j, which are not shown in detail, are preferably designed and arranged in such a way that that each connector is individually and detachable between opposing parallel seat surfaces is fitted on the discharge arrangement 20 and on the associated cylinder head, in such a way that during assembly the vent assembly 20 need not be removed. To this end, each connector contains 19 preferably a short piece of axially expandable metal hose with rigid rings attached to the ends, their annular outer end faces on the seat surfaces of the outflow arrangement and the relevant cylinder head issue. The metal hose can, for example, have ring-shaped waves of sufficient flexibility to allow an axial Allow stretching. The rigid rings are provided with mutually opposite frustoconical surfaces, which engage in correspondingly oppositely inclined edge sections of a profiled split ring, which surrounds the hose section and is itself surrounded by a hose clamp of variable circumference, which according to Can be designed as a "Jubilee" hose clamp. When the hose clamp is tightened, it pushes inward on the split ring, reducing its circumference. " As a result, the split ring wedges the rigid rings and drives them apart. This will the tube stretched, and the outer end faces of the rigid rings against the seat surfaces of the outflow arrangement 20 and the relevant cylinder head pressed »

209321/0723

The outer end faces of the rigid rings preferably have a sealing ring that provides a tight fit guaranteed. Palis should one of the connecting pieces 19 described fail during operation, it can can be easily relaxed, removed and replaced with a new one without any other engine parts being used for this purpose must be removed. However, the risk of interference is low, since the connecting pieces described between relatively rigid surfaces are clamped, which take a fixed and atarre position with respect to each other. The connecting pieces are therefore not exposed to continuous bending loads, as is the case, for example the engine vibration in the conventional baigartigeη "expansion connectors η is the pail that forms the interconnection to the separate exhaust pipes that are generally not rigidly attached and vibrate with respect to the engine. .

209821/0723

Claims (10)

6891 - Claims © Water-cooled internal combustion engine with a charger, characterized in that at least part of the cooling water that cools the internal combustion engine and the charger successively through the Internal combustion engine and the charger flows. 2. Internal combustion engine according to claim 1, characterized characterized in that the charger is a! Turbocharger that is produced by the exhaust gases of the internal combustion engine is driven. 3. Internal combustion engine according to claim 1 or .2, characterized characterized in that an exhaust line arrangement receiving the exhaust gases from the internal combustion engine is also cooled by at least one cable of the cooling water of the internal combustion engine and that this! of the cooling water flows successively through the internal combustion engine and the exhaust line arrangement. 4. Internal combustion engine according to one of the preceding claims, characterized in that the Exhaust pipe arrangement has at least one outflow channel which absorbs the exhaust gases from the combustion engine and's it feeds to the turbocharger, and that this outflow channel is surrounded by a water jacket which is connected to the Cooling water spaces in the internal combustion engine and in which the turbocharger is connected. 209821/0723 - ίο - 5. Internal combustion engine according spoke 4, characterized in that the water jacket of the Exhaust line arrangement close to the outflow openings of the internal combustion engine to the cooling water spaces of the internal combustion engine connected. 6. Internal combustion engine according to one of claims 3 "to 5, dadurehgekennzeiohnet that in the case of a V-engine the exhaust line arrangement in the V-notch of the engine block is arranged and that the supercharger is arranged on a surface of the exhaust line arrangement facing away from the engine is appropriate .. according to ernem ~ der- ^ claims 3 to 6, characterized in that the Exhaust pipe arrangement is rigidly connected to the actual engine and that di® or any exhaust connection between the engine and the exhaust pipe arrangement a connector is made, which is a stretchable piece of tubing, two rigid rings that the ends of the Tubing tightly surrounded, and contains a device that presses the rings apart so that the one ring on a surface surrounding the exhaust opening of the motor and the other ring on one end of the exhaust duct surrounding the exhaust pipe arrangement Firm and tight surface. 8. Internal combustion engine according to claim 7, characterized It is indicated that the rigid rings each connector is provided with opposed opposite frustoconical surfaces are that each connector has a split ring surrounding the expandable hose and rests against the frustoconical surfaces of the rigid rings with appropriately inclined edge sections, ../11 209821/0723 and in that means are provided for contracting the split ring around the rigid rings by wedging to push apart. 9. Brennlcraf tmas machine according to one of claims 5 "to 8, characterized in that a cooling water circulating device cools water sequentially through the engine, then through the exhaust line arrangement, then through the turbocharger through a radiator and from there back to the engine. 10. Internal combustion engine according to claim 9 »thereby characterized in that a lift lock device removes a portion of the cooling water from the exhaust pipe assembly directly to the radiator so that the cooling water does not flow through the! Re / Ii / Ho 209821/0723