DE3300761A1 - Rotary internal combustion engine - Google Patents

Abstract

The rotary internal combustion engine comprises a light alloy engine power section, which spatially divides the functions of the compression and combustion process and permits the transmission of kinetic energy to certain pressure blades in the pressure blade housing by way of three exhaust ports. The cooling air generated by a pressure fan is led by way of cooling ducts through the pressure blade housing to the exhaust, so that the old gases are removed and the pressure blades cooled and a part of the cooling air is fed to the mixing chamber for the after-burning process. Due to the assignment to a low-wear piston orbit with a cylindrical inner seal, sealing off from the sealing rings of the cheek plates is simultaneously achieved. By means of stop bolts on the rotating piston a limit stop to the ball bearing races supported in housing partition wall and housing end covers is achieved, which races are supported all-round at a constant distance from the piston orbit front face. The rotating pistons are provided with angled, spring-loaded seals. For lubrication of the rotating pistons oil ducts are provided, which in a certain piston position establish a connection to an oil duct provided in the piston guide cylinder, which duct is fed by hydraulic fluid at the piston adjustment pressure.

Description

Walter Schmidt
Röblingstrasse 31

1000 Berlin 42 January 3, 1983

Additional registration
The additional registration relates to the main registration

File number P 31 28 309 from July 18, 81

- "Rotary piston internal combustion engine ^w -

The additional registration is intended to improve or complete the structure and technical function of the rotary piston internal combustion engine will.

According to the invention, the engine housing, which consists of the combustion chamber, Compression chamber and pressure vane housing are made of light metal manufactured by a housing partition in which an intermediate storage the drive shaft is mounted, divided and laterally bounded by the housing end cover, in which the main bearings are at the same time the drive shaft are stored. The engine case is provided with longitudinal cooling channels in which the one at the front and powered by the drive shaft Cooling air generated by a pressure fan is passed over the middle housing end cover and fed to the pressure blade housing will. On the pressure shovel housing are opposite those for the waste gas outlet provided recess through slots provided. The cooling air is drawn into the pressure blade housing through these passage slots printed with the one located between the pressure blades Old gas is mixed and discharged into the exhaust pipe, but at the same time some of the cooling air is passed through the pressure vanes passed on the underside of the combustion chamber and the combustion gases discharged from the exhaust ports are supplied.

According to the engine housing (combustion and Compression chamber) is assigned a piston orbit made of low-wear alloy, which is eccentric in the intended for this purpose to the drive shaft offset cylindrical recesses is seated tightly but easily exchangeable. The narrow side of the piston orbit is cylindrical at the bottom

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and thus provides a seal to the faces in the cheek plates bearing sealing rings. The lateral demarcation to the outside is made by the housing end cover and the G-housing partition reached.

According to the invention, the drive shaft consists of two parts and is connected to a unit by a groove pin during installation. The individual drive shafts are with the cheek plates and the piston guide cylinders in between firmly connected and, including the rotating pistons, form a compact unit that can be easily inserted into the motor housing and the piston orbit from the end faces.

A further development of the invention ensures that two grooves are provided on the rotating piston end faces, each with a groove on the narrow side of the rotary piston in There are connections in which two angular sealing strips are mounted, which by means of the pressure in the JETutentiefe mounted flat springs are pressed against the piston orbit and thus a seal between the rotating piston and Piston orbit is achieved on all sides.

A further development of the invention is that for Lubrication of the rotary piston and piston orbit on the rotary piston face and narrow side oil channels are provided, which at end of the broad side remaining in the piston guide cylinder. There is an extension of the oil channel in the piston guide cylinder present, which is in communication with the pressure fluid for piston adjustment and at a certain sliding position of the Rotating piston allows an oil flow, whereby the supplied amount of oil is dosed.

Another further development of the invention serves the purpose to limit the existing hydraulic adjustment pressure of the rotating piston face to the piston orbit face so, that the wear is reduced in this area. To achieve this, on the lower quarter of the rotary piston

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Stop bolts are provided on the narrow side, which can move slidingly in the slots provided in the cheek plates. In the housing partition and on the inside of the front and middle G-housing end cover, cylindrical recesses are provided in which a narrow ball bearing is mounted so that there is a constant distance to the end face of the piston orbit all around. If the Uailaufkolben is pressed by the hydraulic adjustment pressure to the face of the piston orbit, the stop bolts are pressed against the ball bearing inner ring and a delimitation is achieved so that between the face of the circulating piston and the face of the piston orbit there is a gap of about 0.25 - ^ m remains all around. The sealing of the rotary pistons to the piston orbit is ensured by the spring-loaded angular sealing strips.

According to the invention, a further development is achieved in that the combustion gases expelled from the combustion chamber The pressure blade housing is supplied via three outlet channels and is transmitted in a targeted manner to certain pressure blades. After a pressure transfer of the combustion gases to the Circumferential pistons are on the face of the piston orbit 160 ° away from the ignition point, three outlet slots are assigned, the width and distance from one another of the narrow side of the rotary piston correspond. The outlet slots are through three outlet channels running in the direction of rotation with the pressure vane housing tied together. If the rotary piston opens the first two outlet slots through the face of the rotary piston, in this way the highest combustion pressure is transmitted to two pressure blades which are close to the first two outlet channels. at this piston position is at the same time taken from the rear of the rotary piston * the third outlet slot was kept open and the overflow channel of the 90 ° upstream rotary piston fully open so that the compressed in the compression room Secondary air in the space between the two rotary pistons flows in and the rest of waste gases from the previous combustion process via the third outlet channel to one less

pressure-loaded pressure shovel discharges. "~

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Opposite the first two outlet channels is in the pressure vane housing a spatial recess is provided which serves as a mixing chamber. The purpose of this is that the Secondary air supplied to pressure blades is better with the air that is still in the flame state and expelled through the outlet slots Combustion gases is mixed. This ensures that the Remaining stocks of fuel fractions as a result of a lack of oxygen could not burn, be ignited by the mixing of oxygen components of the secondary air, whereby at the same time the combustion pressure increased and due to the backwater is powerfully transferred to the pressure blades to the mixing chamber,

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Additional registration

Subject: main registration file number. P 31 28 309 of July 18, 81 - "Rotary piston internal combustion engine" -

Tasks:

The invention is based on the object, which is already in the Main registration known technical functions of the To complete or technically improve the rotary piston internal combustion engine. The task at hand provides that the motor housing Made of light metal, with low-wear, lightweight equipped with exchangeable piston orbits and is cooled by a pressure fan via cooling air ducts. Another The object of the invention has the purpose of promoting the contours of the machine in that the drive shaft is divisible and a compact unit with cheek plates and the piston guide cylinders between them, including the rotary piston forms in order to be easily exchangeable from the housing front sides.

Another object of the invention is that the Uialaufkolben are provided with a stop which creates a limit against a ball bearing ring mounted at a constant distance from the end face of the piston orbit so that there is a distance of approx , 25% consists. Furthermore, that the rotary pistons provided with angular spring-loaded sealing strips produce a seal to the piston orbit, and are also equipped with oil channels that only allow oil to flow in a certain piston position, so that the circulating piston and piston orbit are supplied with metered amounts of oil. <

Erfindungsgemüß the pressure transfer of kinetic c energy of the combustion gases in dae pressure blade housing by q three outlet channels is specifically gen certain pressure blades transferred C. By opposite the outlet channels on Druckschaufel- ^l Housing located? 'Iischkammer is by the Prude- * """"

existing residual stocks of fuel components improved.

Solution:

The solution to the problem \ drd is explained using the drawings.

By Jig. 4 is a longitudinal section through combustion and Compression room shown (the pressure blower is shown schematically shown).

By Pig. 5 shows a cross section through the combustion chamber and pressure vane housing (from the rear seen).

Further drawings are Pig. 1, Pig. 2 and Pig. 3 of the main application enclosed, which are borrowed for reference to reference characters required.

It is assumed that the motor housing 5 is made of light metal exists and by means of a with the drive shaft 9 <nbetrie benen pressure blower 14 is cooled.

The motor housing 5 is provided with cooling channels 57, so that through the flow of cooling air these are passed to the end face and via passage slots 45 on the pressure blade housing 42a opposite the waste gas outlet 46a - which is provided after 4- O ⁰ from the ignition point - through the spaces between the Pressure blades 42 is discharged into the exhaust 46 mixed with the waste gases. The lower side of the combustion chamber 10 is cooled by the cooling air supplied to the pressure blades 42 before it is supplied to the outlet slots 41.

Between the cylindrical recesses for the piston orbits 21 and 22 of the combustion and compression chamber and 11 is a housing partition 58 is provided in which a Intermediate bearing 59 for the drive shaft 9 is mounted. The piston orbits 21 and 22, which consist of a low-wear Made of metal, are cylindrically shaped and are fixed, but exchangeable in the recesses provided for this purpose fitted in the motor housing 9. The lateral delimitation to the narrow sides of the circulating piston is 5 £ ks corresponding to the eccentrically mounted drive shaft 9 is adapted to the different distances from the piston guide cylinders 12 and 13.

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The piston orbit chalk sides 73 are at the inner end angled outwards and form a cylindrical end, the diameter of the cheek plates and the The width of the end faces. They form a seal with respect to the sealing rings 74 mounted in the cheek plates.

The drive shaft 9 for the combustion chamber 10 is connected to the cheek plates 6 and 7 and the one mounted between them Piston guide cylinder 12 firmly connected and ends at the intermediate bearing 59 of the housing partition 58. The drive shaft 9a for the compression chamber 11, which is firmly connected to the cheek plates 8 and 8a and the piston guide cylinder 13, is with a groove pin 60 is provided, which produces a shaft connection fitting in a cap bore of the drive shaft 9. The purpose of this is to insert the two units described into the motor housing 5 and the piston orbit 21 and 22 to be inserted and joined from the outside of the motor housing. The front housing end cover 61, .the one connection for the pressure blower 14 and carries the front shaft bearing 64, is provided with recesses 62 for the cooling channels 57 and the secondary air supply 15 to the air chamber 17. The inside of the end cover has a cylindrical recess to limit the cheek plate 8a and a lateral one Limitation to the piston orbit 22 is provided. The middle housing end cover 63 forms the lateral boundary to the combustion chamber 10 and has the same cylindrical recesses for the cheek plate 6 and the piston orbit 21 on. The seal to the drive shaft is achieved by a. S "always ring achieved (not shown in the drawing).

The rear housing end cover 65 is provided with the rear shaft bearing 66 and forms the rear end to the turbine wheel disk 44 and to the pressure blade housing 42 a.

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For sealing the rotating pistons to the piston orbits 21 and 2 2 become two on the face of the rotary piston Grooves are provided, each of which is connected to a groove on the narrow side of the rotary piston. Two angular Sealing strips 67 formed are stored in the grooves and by the pressure of a flat spring stored in the groove depth laterally and upwardly adapted to the piston orbit. The sealing strips are angled 67a at the end of the long side and cause an upward limit stop through a recess in the groove, so that the sealing strips are switched off of the hydraulic adjustment pressure remain in the groove.

Between the two sealing strips is the rotating piston face in the middle and an oil channel 69 for lubrication is provided on the two narrow sides, the one on the broad side of the rotary piston ends inside the piston guide cylinder, but in a position in the BDC area a connection to one in the piston guide cylinder Provided oil channel produces which is in communication with the hydraulic pressure fluid and thus a Oil flow achieved. With this arrangement, rotating pistons and piston orbits with metered amounts of lubricating oil, the is added to the hydraulic oil, is supplied.

In order to adjust the hydraulic pressure of the rotary piston To limit the end face of the piston orbit, stop bolts 70 are provided on the lower quarter of the narrow side of the circulating piston provided, the slide can be moved in the slots 71 of the cheek plates. The two insides of the housing partition 58 as well as the front and middle housing end covers and 63 are provided with a cylindrical recess in which a narrow ball bearing 72 is mounted so that there is a constant distance all around to the end face of the piston orbit. The rotary piston becomes the face of the piston orbit through the hydraulic adjustment pressure in the piston guide cylinder moved, the stop bolts 70 are pressed against the inner ring of the ball bearings 72 and with the rotating piston set in rotating motion. Through this limitation

stop is between the Uralaufkolben face and the Front side of the piston orbit a constant distance of approx. 0.25% achieved all around. The seal to the piston orbit is ensured by the spring-loaded sealing strips 67.

In the face of the cheek plates are two all around Annular grooves are provided in which two piston ring-shaped Sealing rings 74 are mounted and cause a gas-tight seal to the narrow sides of the piston orbit 73, so that a seal to the piston orbits and to the existing pressure fluid on the end caps is achieved.

In the piston guide cylinder, in the recesses for the Rotary piston provided a groove just below the Cheek disc face ends. In this groove there is a Soft seal 75 mounted, which rests on the rotary piston. This creates a tight seal between the existing pressure fluid and the piston orbit achieved.

After a useful effect of 160 °, the combustion gases are expelled through three outlet slots 41, which have the width of the narrow side of the circulating piston, and fed to ^{the pressure vane housing c ¥ 1} * ^{J via three outlet channels 76, 77, 78 running in the direction of rotation.} If the first two outlet slots are opened by the rotary piston 1, the highest combustion pressure is transmitted via the outlet channels 76 and 77 to two specific pressure blades 42 which are close to the outlet channels. In this position of the circulating piston 1, the overflow channel 37 is opened by the circulating piston 4 leading by 90 ° and the secondary air compressed between the two circulating pistons 4a and 4b of the compression chamber 11 is pressed into the space between the circulating pistons 1 and 4, so that the remaining combustion gases from the previous one Combustion process can be derived via öen outlet channel 78 to a less pressure-loaded pressure blade. If all three outlet slots 41 are opened by the rotary piston 1 at 190 °, the combustion gases, which are already somewhat relaxed, are supported by the subsequent

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lowing rotary piston 2, through the outlet channels 76, 77, 78 onto the subsequent pressure blades 42 of the pressure blade housing 42 a transferred.

Opposite the outlet channels 76 and 77 is in the pressure blade housing 42 a, a spatial recess is provided which serves as a mixing chamber 79. The purpose of the mixing chamber is that of the Combustion gases emitted from the combustion chamber 10, which are still in the flame state, with the combustion gases between the pressure blades 42 to mix the secondary air supplied more intimately in order to improve the combustion of the remaining fuel components to achieve. With the afterburning, the incineration only becomes. pressure in the mixing chamber 79 increased and useful on the Transfer pressure blades.

The following advantages can be achieved through the expansion of the invention shown in the additional application:

- Through the design of the engine housing of the rotary piston internal combustion engine light metal improves the power-to-weight ratio and promotes heat dissipation.

- By a compressed air blower used to cool the motor the cooling air is guided through the air ducts around the compression and combustion chambers, but at the same time at the old gas outlet through the pressure shovel housing into the exhaust. As a result, the between the Old gases located in the pressure shovels mixed with the cooling air have a noise-dampening effect on the old gas discharge. At the same time, the pressure blades are cooled and the cooling air supplied between the pressure blades to the outlet slot is applied to cool the piston orbit.

- Due to the compact design of the cheek washers - piston guide cylinder including rotary piston on two joinable Drive shafts to a unit, the assembly costs are favorably influenced. In the event of a dismantling

(Renewal of the sealing strips or piston orbit) The entire unit including the exchangeable piston orbit can be removed by removing the housing end cover can be removed from the motor housing, which in turn has a favorable effect on labor costs.

In that the provided for lubrication of the rotary piston Oil channels only at a certain point of intersection with the piston guide cylinder allow oil to flow through, the amount of oil supplied can be dosed in such a way that a sufficient, but economical oil allocation takes place. By adding lubricating oil to the hydraulic oil used for piston adjustment, alle_i moving engine parts subject to wear and tear are adequately supplied with lubricating oil, so that the wear and tear on is reduced to a minimum.

Through the limit stop of the rotary piston is a important wear area switched off and smooth running the overflow piston reached in the piston orbit.

Through the targeted transfer of the kinetic energy of the combustion gases to certain pressure blades and through the Assignment of a mixing chamber in the pressure blade housing is made the performance of the machine is increased and the exhaust gases are more environmentally friendly submitted.

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3e Zues - <fl ~ -: - · ■ - .- ·. .: ■ -.- - £ ZR- .; .. ■; ■ ·. j. ■ - 4a ^ symbol for drawing? i £. I, 2 and id 3 - - 4b Circulation piston :. : Combustion brown. la Rotary piston (compression chamber; Ib 7.8- Rotating piston (compression chamber) 5 ■ Motor housing 6, - Cheek discs 9 - drive shaft 10 - Combustion room 11th - Compression room 12th - Piston guide cylinder (combustion chamber) 13th - Piston guide cylinder (compression chamber) 14th - Pressure blower 15th - Air duct 16 .19 - Air regulating piston 17th _ Air chamber 18th - Air inlet slots 20th - Space between the rotating pistons 21 .24 - Piston orbit (combustion chamber) 22nd - Piston orbit (compression space) 23 - Fuel injectors 25th - Magnetic shut-off valve 26th - Hydraulic oil tank ^; 27 - oil pump 28 - - check valve 29 - Pressure sensor 30th - Three-way solenoid valve 31 - Oil supply 32 - Oil return 33 - oil pump 34 - check valve I 35 - Pressure sensor 36 «A * Oil supply 37 overflow channel 38 wedge-shaped depression

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39 - Combustion chamber 40 - spark plug 41 - Outlet slots 42 - Pressure blades 42a - Pressure vane casing 43 - Pressure blower 44 - Turbine wheel disk 45 - Passage slots 46 - Exhaust 47 - Control magnet (low temperature) 48 - Control magnet (high temperature) 49 - Throttle linkage 50 - Air regulating screw 51 - electronic control unit 52 - Shut-off ring 53 - Edge demarcation for rotary flasks lb-2a, 3b-4a the oil supply 31 54 - oil passage 55 - Oil passage 56 - Space delimitation for rotary pistons la - £ b., 3b -4b the oil supply 36

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- Rotary piston internal combustion engine -

Reference numbers for the drawings Fig. No. 4 and

1-4 rotary pistons (combustion chamber)

4a rotary piston (compression chamber)

5 motor housing 6-7-8-8a cheek washers

9 Drive shaft (combustion chamber) 9a Drive shaft (compression chamber)

10 combustion chamber

11 compression room

12 piston guide cylinders (combustion chamber)

13 piston guide cylinder (compression chamber)

14 pressure fan

15 air duct 17 air chamber

21 piston orbit (combustion chamber)

22 piston orbit (compression space)

31 Oil supply

32 oil supply

37 Transfer duct

38 wedge-shaped recess

39 combustion chamber

40 spark plug

41 outlet slots

42 pressure blades

42a pressure vane housing

44 turbine wheel disk

45 slots

46 exhaust

46a waste gas outlet

57 cooling channels

58 Housing partition

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59 Intermediate Storage

60 groove pins

61 Front housing end cover

62 recesses for cooling channels

63 Middle housing end cover

64 Front shaft bearing

65 Rear housing end cover

66 Rear shaft bearing

67 Angular sealing strips 67a Stop for sealing strips

68 flat spring

69 oil channels for circulation pistons

69a oil channel for piston guide cylinder

70 stop bolts

71 sliding slots for stop bolts

72 ball bearing ring

73 Piston orbit narrow sides

74 Sealing rings for cheek washers

75 soft seals 7 ^ -77-78 exhaust ports

79 mixing chamber

80 Piston circulation valve face

81 Cylindrical end of the piston orbit

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Claims (1)

J J U U 7 b "I Walter Schmidt
Roblingstrasse 31 Berlin 42 January 3, 1983 Additional registration Subject: Main application file number P 3128 309 of July 18, 1981 - Rotary piston internal combustion engine - Claims 1.JCircular piston internal combustion engine, in which the three punctures - compression, combustion process and exhaust gas turbine are spatially separated in an engine housing made of light metal and are supplied with cooling by a pressure fan. "Characterized in that a pressure fan (14) operated by the drive shaft (9) is assigned to the front face in such a way that there is a connection to cooling ducts (57) which run in the longitudinal direction via the compression chamber (11) and the combustion chamber (10) to the middle housing end cover (63) and the supplied cooling air is fed through the passage slots (45) on the inside of the pressure blade housing (42a) to the pressure blades (42) so that the waste gas located there is mixed with the cooling air into the exhaust ( 46), but at the same time some of the cooling air is fed through the pressure blades (42) of the mixing chamber (79). 2. The eccentrically offset to the drive shaft cylindrical recesses (for the piston orbits combustion (10 and compression chamber (11)) are provided, the piston orbits of wear-resistant material associated. A rotary piston internal combustion engine according to claim 1 characterized in that the piston orbit end faces (80) correspond to the circular cylindrical recesses (21 and 22) provided in the motor housing (5), but the narrow sides of the piston orbit (73) intended for the lateral limitation are adapted to the different distances to the piston guide cylinders (12 + 13) and are at right angles running outwards one 7.- Form a cylindrical closure (81), which has the dimensions of the cheek washers (6-7-8-8a) in terms of diameter and width, so that the inner sides provide a seal to the sealing rings (74) mounted in the cheek washer end faces is achieved, but there is a tight seal to the housing partition wall (58) and to the front end cover (61) and the middle end cover (63) through the outer sides. The drive shaft with the associated cheek plates and Piston guide cylinders for puncturing the compression process in the compression chamber as well as the power transmission of the combustion pressure through the rotating pistons in the combustion chamber and the associated turbine wheel disk to transfer the kinetic energy from the pressure blade housing be assigned to the motor housing so that the time required for assembly and disassembly is limited to a minimum can be. Rotary piston internal combustion engine according to Claims 1 and 2, characterized in that the drive shaft consists of two parts, one shaft half (9) being associated with the combustion chamber (10), but the other shaft half (9b.) Associated with the compression chamber (11) and with a Jfutenzapfen (60) provides a shaft connection and is supported by an intermediate bearing (59) on the housing partition (58). That the cheek washers (8 and 8a) provided for the compression space and the piston guide cylinder (13) between them are firmly connected to the shaft half (9a), and, including the rotary piston, form a closed unit from the front face of the housing out of the piston orbit (22 ) are supplied so that a lateral delimitation of the compression space is achieved through the front housing end cover (61) in which the front shaft bearing (64) is mounted. That the rear half of the shaft (9), which serves as the drive, with the cheek plates (6 and 7) provided for the combustion chamber (10) and the piston guide cylinder in between (10) is firmly connected and including ier COPY BAD-OfWKiIMAt. '3' 3 UU 7 6 1 Rotary piston is introduced from the rear housing end face of the piston orbit (21), so that at the same time a shaft connection to the front shaft half (9a) is achieved through the groove pin (60). The side Limitation is through the middle end cover (63) tells. The turbine wheel disk is through a fit firmly connected to the shaft half (Q). Through the rear housing end cover, in which the rear shaft bearing (66) is stored, the rear side border of the motor housing is reached. Rotary piston internal combustion engine according to Claims 1 to 3, characterized in that there are two grooves on the end face of the rotary pistons which each establish a connection with a groove located on the narrow side of the rotary piston, in which two angular sealing strips (67! Are mounted and through one of the flat springs (68) located in the depth of the groove cause an adjustment pressure to the piston orbit face and narrow side, but a limit to the face is achieved by a stop (67a). Rotary piston internal combustion engine according to claims 1 to 4, characterized in that between the two sealing strips (67) in the middle of the rotating piston end face and the two narrow sides an oil channel (69) is provided for lubricating the rotating piston, which is inside on the rotating piston broad side of the piston guide cylinder ends, but at a certain distance from the piston orbit it establishes a connection to an oil channel existing in the piston guide cylinder, which is connected to the hydraulic pressure fluid for adjusting the circulation piston, so that the limited oil flow determines the amount of oil supplied to the rotating piston. H. 6. circular basket internal combustion engine according to claims 1 to characterized in that cylindrical recesses are provided in the insides of the G _e häusetrerinwand (58) and on the insides of the front and middle G _e housing end cover (61 and 63), in which narrow ball bearings (72) are stored in such a way that there is a constant distance all around to the end face of the piston orbit (80). That on the lower quarter of the circulating piston narrow sides Stop bolts (70) are attached, which are moved in a sliding manner in the slots (71) of the cheek plates (6, 7, 8, 8a) can, but through the hydraulic adjustment pressure on the rotary piston, a limit stop to the ball bearing he inner ring (72) effect so that between the rotary piston face and the piston orbit face (80) there is a constant small distance. 7. Rotary piston internal combustion engine according to claims 1 to, characterized in that groove-shaped recesses are provided in the piston guide cylinder to the broad sides of the rotating piston, just below the end faces, in which soft seals (75) are stored, which tightly fit a seal between the rotating piston cause the existing pressurized fluid to move to the piston orbit. 8. Rotary piston internal combustion engine according to claims 1 to, characterized in that the end face of the piston orbit, 160 ° away from the ignition point, three outlet slots (41) are assigned, which have the dimensions of the circumferential piston narrow side according to width and distance from one another and by three in Outlet channels (76, 77, 78) extending in the direction of rotation are connected to the rotary vane housing (42a). That with a piston position of 180 ° the outlet channels (76 and 77) are fully open, so that the highest combustion pressure is transmitted to two pressure blades (42) close to the outlet channels. g ^ _D ORIGINAL A ■ - That "in this piston position (180 °) through the rear of the rotary piston the outlet channel (78) and the overflow channel (37) through the 90 ° leading piston are fully open, so that the compression chamber (11) compressed secondary air in the space between the two Rotating piston penetrates and that from the previous combustion process Remaining residual gases via the outlet channel (78) onto a pressure shovel with little pressure is derived. Rotary piston internal combustion engine according to Claims 1 to 8, characterized in that a spatial recess is provided in the pressure vane housing (42a) opposite the two outlet ducts (76 and 77), which recess serves as a mixing chamber (79) and thus has the purpose of that the secondary air supplied by the pressure blades (42) is better mixed with the combustion gases in the flame state.