DE3026485A1 - IC engine driven compressor - has compressor cylinder integral with engine block to reduce weight and space - Google Patents

Abstract

The engine has a crankcase with a cylinder block above it and a crankshaft (5) running through it. A connecting rod (8) extends from a crankpin (11) on the shaft to a piston (7) in a cylinder. This cylinder works as an internal combustion engine. A further connecting rod (3) on a bearing (12) on the same crankpin (11) drives a piston (2) in another cylinder. This cylinder works as a compressor which is driven by the engine. The two cylinders are formed integrally in the same machine and are conveniently arranged in a V. Alternatively the enqine and compressor cylinders can be in line with the connecting rods on different cranks.

Description

Fichtel & Sachs AG, 8720 Schweinfurt

11 744- patent and utility model auxiliary registration;

Internal combustion engine with an integrated piston compressor

The invention relates to a reciprocating compressor, that of an internal combustion engine with at least one piston acting in a working cylinder is drivable, the piston of the internal combustion engine via a connecting rod to a The crankshaft acts and sets it in a rotary motion.

Such piston compressors are used to generate the pressure in working with pressure medium circuits Units such as heat pumps, cooling units, compressed air storage units and the like. she are usually motor-driven and used stationary or transportable. as Drive motor can depending on the local or technical Use an electric motor or an internal combustion engine. Internal combustion engines are z. B. in areas with no electrical supply or for transportable Used aggregates.

The object of the invention is to create a reciprocating compressor of the type described above, who builds small, through technical-construction-

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tive measures have the lowest possible weight and easy to handle with easy maintenance is.

This object is solved by _r that the piston of the piston compressor and the piston of the internal combustion engine acting on a common crankshaft. This measure results in a small overall volume due to a common crankcase, which is also designed as a common oil pan for the required »lubricating oil, an oil pump that works together for both individual units and the elimination of the commonly required connecting structural elements. Conventional multi-cylinder internal combustion engines can also be converted by integrating a piston compressor.

In another embodiment it is provided that the piston of the reciprocating compressor and the piston of the internal combustion engine act on a common crank pin, wherein It is advantageous that the common crank pin in a crank pin part for the internal combustion engine and a crank pin part for the reciprocating compressor is divided, or that the outer dimension of the crank pin part for the

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Internal combustion engine from the outer dimension of the crank pin part for the reciprocating compressor differs, and that the diameter of the crank pin part for the reciprocating compressor is larger than the diameter of the crank pin part for the Internal combustion engine. These measures allow different stroke paths for the piston accomplish the piston compressor and the piston of the internal combustion engine. Through this there is a reduction or transmission ratio in the compression output and the compaction performance can be reduced by simple measures with otherwise standard Manufacture of the internal combustion engine easily adapt to the most diverse requirements.

In one embodiment, it is provided that the cylinder of the piston compressor is sealed with a leak-free seal against the common crankcase, and that this leak-free seal is oil-lubricated and the oil in it is connected to an oil separator in the pressure medium circuit of a unit operated by the piston compressor, or . That the piston of the piston compressor acting on the common crankshaft is assigned at least one further compressor piston and the space between the piston and the seal

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device is connected to the intake duct of the reciprocating compressor by a connecting line is. This ensures that the oil required for lubrication is always in the seal is available. This ensures a long service life and reliable functionality lowest maintenance effort achieved.

In a further embodiment it is provided that the space between the piston and the seal is as an oil separator in the pressure medium circuit of the reciprocating compressor. This ensures that the seal on the compressor piston side is always under oil and thus a maintenance-free liquid seal is given.

The invention is illustrated in the drawing and is shown below with reference to the Embodiments explained in more detail. It shows:

Fig. 1 shows an internal combustion engine

integrated piston compressor with common crank pin;

FIG. 2 shows an internal combustion engine according to FIG. 1 with a further compressor piston in FIG a separate compressor cylinder;

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3 shows a multi-cylinder internal combustion engine converted to an integrated piston compressor .

The reciprocating compressor shown in Fig. 1 is provided with a piston 2 which reciprocates by a connecting rod 3, and is reciprocatingly disposed in a Zj 4- linder. The piston compressor 1 is integrated into an internal combustion engine 6. The internal combustion engine 6 is provided with a piston 7 which is arranged to reciprocate on a connecting rod 8 in a cylinder 9. The connecting rod 3 or the piston 2 of the piston compressor 1 and the connecting rod 8 or the piston 7 of the internal combustion engine 6 act on a common crankshaft 5 and, in the exemplary embodiment shown, also on a common crank pin 10. The crank pin 10 is divided into two parts one crank pin part 11 is provided for receiving the connecting rod 8 of the internal combustion engine 6 and the other crank pin part 12 is provided for receiving the connecting rod 3 of the reciprocating compressor 1. The crank pin part 11 assigned to the internal combustion engine 6 has a smaller diameter than the crank pin part 12 assigned to the piston compressor 1. A flywheel 20 is assigned to the common crankshaft 5 in order to bridge the dead centers.

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As FIG. 2 shows, the common crankshaft 5 is also arranged in a common crankcase 13, this common crankcase 13 at the same time serving as an oil pan for the lubrication required both in the piston 7 of the internal combustion engine 6 and in the piston 2 of the piston compressor 1; serves. Since this oil is often heated to considerable temperatures by the internal combustion engine 6, on the other hand that for the lubrication of the piston ? dos P ^ oI-ben compressor 1 is often at least partially circulated in oinem coolant circuit, a further compressor piston 1 ^> is provided in this embodiment, which is driven indirectly by the piston 2. Between piston 2 and compressor piston 1 [? a heat buffer in the form of a room 16 is provided. The further compressor piston 15 is sealed off from the space 16 by a leak-free seal 14. The space 16 is connected via a connecting line 18 to the intake duct 17 of the compressor cylinder 19 which receives the further compressor piston. This connecting line 18 can be connected to an oil separator, not shown, of the refrigerant or pressure medium circuit; this space 16 can also be designed as an oil separator.

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The unit shown in Fig. 3 shows one from a conventional multi-cylinder internal combustion engine Internal combustion engine resulting from retrofitting with an integrated piston compressor In this exemplary embodiment, the output unit is used a four-cylinder internal combustion engine, two of the existing cylinders 21 as cylinders 4- for the piston compressor 1 and two for the cylinders 9 of the internal combustion engine 6 are converted. The cylinder 4 of the piston compressor 1 are also assigned compressor cylinders 19 in which v / pus Compressor piston 15 are arranged to go back and forth. The other compressor pistons 15 are provided here with piston rods 22 which are in operative connection with the piston 2 stand. .

The internal combustion engine 6 is here as a four-stroke internal combustion engine controlled via valves 23 shown, as is any other mode of operation such as two-stroke internal combustion engines or diesel engine possible. The connecting rods 3 of the reciprocating compressor 1 and the connecting rods 8 of the internal combustion engine 6 run in this embodiment on separate crank pins 10, but are also here a different diameter dimensioning and thus different Strokes possible.

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3026486

Item list for 11 744

1 piston compressor

2 pistons v. 1

3 connecting rod v. 1

4 cylinder v. 1

5 crankshaft

6 internal combustion engine

7 piston v. 6th

8 connecting rod v. 6th

9 cylinder v. 6th

10 crank pins

11 Crank pin part for 6

12 crank pin part for 1

13 crankcase

14 leak-free seal

15 compressor pistons

16 room

17 intake duct v. 1

18 connecting cable

19 compressor cylinders

20 flywheel

21 cylinders

22 piston rod for 15

23 valves

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Claims (8)

302Ö485 Fichtel & Sachs AG, 8720 Schweinfurt 11 April 28, 1980 Claims Reciprocating compressor from an internal combustion engine with at least one, in one Working cylinder acting piston is drivable, the piston of the internal combustion engine A crankshaft acts via a connecting rod, causing it to rotate offset, characterized in that the piston (2) of the piston compressor (1) and the piston (7) of the internal combustion engine (6) act on a common crankshaft (5). 2. Piston compressor according to claim 1, characterized in that the piston (2) of the Piston compressor (1) and the piston (7) of the internal combustion engine (6) on a common Crank pin (10) act. 3. Piston compressor according to claim 1 and 2, characterized in that the common crank pin (10) is divided into a crank pin part (11) for the internal combustion engine (6) and a crank pin part (12) for the piston compressor (1). 130065/0408 4. Piston compressor according to claim 1 to 3i characterized in that the outer dimension of the crank pin part (11) for the internal combustion engine (6) differs from the outer dimension of the crank pin part (12) for the reciprocating compressor (1). 5 · Piston compressor according to claim 1 and 4, characterized in that the diameter of the crank pin part (12) for the reciprocating compressor (1) is larger than the diameter of the crank pin part (11) for the internal combustion engine (6). 6. Piston compressor according to claim 1 to 5i, characterized in that there / 5 of the cylinder (4) of the reciprocating compressor (1) is sealed with a leak-free seal (14) with respect to the common crankcase (13) is and that this leak-free seal (14) is oil-lubricated and that located in it oil with an oil separator in the pressure medium circuit of one of the reciprocating compressor (1) operated unit is connected. 7. Piston compressor according to claim 1 and 6, characterized in that the piston (2) of the piston compressor (1) acting on the common crankshaft (5) is assigned at least one further compressor piston (15) and the space (16) 130065/0408 between the piston (2) and the seal (16) through a connecting line (18) with the suction channel (17) of the reciprocating compressor (1) is connected. 8. Piston compressor according to claim 1 and 7t characterized in that the space (16) between the piston (2) and the seal (14) as an oil separator in the pressure medium circuit of the reciprocating compressor (1). 130065/0408