DE2423949A1 - Rotary piston engine has hollow eccentric piston - concentric shaft carrying fixed and pivoted seal strip with suction and overflow ducts - Google Patents

Abstract

The housing has a cylindrical inner wall engaged by the rotating radial seal strips. The hollow cylindrical piston is in single-line sealing contact with the housing wall. The shaft is hollow and sealingly and rotatably carries the piston. One sealing strip is secured to the shaft and sealingly penetrates the piston wall through a swivel bearing. The other strip is pivotable on the shaft and sealingly penetrates the piston wall via a swivel bearing. Each seal strip has a suction duct and an overflow duct. The suction duct leads from the inside of the hollow shaft to an orifice on the trailing side, which is closed by the piston in one position. The overflow has an inlet orifice on the leading side and an outlet on the trailing side of the seal strip. The engine housing has an outlet port approximately opposite to the ignition means.

Description

May 14, 1974 9370-74 Dr.ν.B / S

Joseph Rogl, 1750 American Avenue, Pomona . Calif. 91767, V.St.A.

Rotary vane internal combustion engine

The present invention relates to a rotary vane internal combustion engine with a housing having a bore in which a rotary piston is rotatably mounted, further with a number of slides which are at least approximately radially displaceably mounted in the rotary piston and with their end faces slide tightly against the wall of the housing bore, and with an output shaft which is coupled to the rotary piston.

Rotary piston internal combustion engines of the above Type are known e.g. from German Patent 596 625 and German Patent 769 228. So far, however, they have not been used in practice can enforce because they are relatively complicated in structure, especially difficult to manufacture housing and Need rotor shapes, and leave something to be desired in terms of efficiency. There is a very significant disadvantage also in the fact that the slide are exposed to loads that run transversely to their guides and easy to jam the Slide can lead.

The present invention is accordingly based on the object of specifying a rotary vane internal combustion engine, which is simple in construction and manufacture, is characterized by a high degree of efficiency and does not jam the slide is tilting.

This object is achieved by the invention characterized in claim 1.

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The subclaims relate to further developments and refinements of the invention.

The present rotary valve internal combustion engine contains a housing with a cylindrical bore and a hollow cylindrical rotary piston, which are easy to manufacture. They are also characterized by a high torque and balanced running properties, since they take place on one revolution of the output shaft or one revolution of the rotary piston 'falls two working cycles and expansion and compression take place at the same time. The slides are mounted in such a way that jamming is impossible. The volume of the engine is optimally used.

Another major advantage of the rotary vane internal combustion engine according to the invention consists in that the inner parts by the sucked fuel-air mixture be cooled.

In the following an embodiment of the invention is explained in more detail with reference to the drawing; show it:

Figure 1 is an end view of a rotary vane internal combustion engine according to an embodiment of the invention, in which the viewer-side housing cover is removed became; Parts of the internal combustion engine are shown in section;

Figure 2 shows an axial section in a plane H-II of Figure 1 and

FIG. 3 shows a sectional view corresponding to FIG. 2, in which the one pivotably mounted slide is in its uppermost position (seen in FIG. 1).

The exemplary embodiment of the invention shown in the drawing is a four-stroke gasoline engine about 200 cm displacement. The motor has a housing 10 which is in can be substantially cylindrical and has a bore 12 with a cylindrical wall 14.

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The housing 10 can have cooling channels 16 for a cooling liquid be provided or, in the case of air cooling, be ribbed on its outside (not shown). In the Bore 12 of the housing 10, a hollow cylindrical rotating basket 18 is eccentrically arranged, the outside of which the wall 14 of the bore 12 of the housing touches along a surface line 20 and there with respect to the housing an axially extending seal 22 is sealed.

The seal 22 can, as shown, be a flattened one Round rod made of bearing metal or the like. Included with guide pins 26 is mounted in the housing and is pressed against the outside of the rotary piston by an open scroll spring 28.

The end faces of the housing 10 are closed by side walls 32 which are screwed to the housing 10. the Front sides of the rotary piston 18 are sealed against the inner sides of the side walls 32 by seals 34 (FIG. 2) and connected to paddles 36, which are mounted in ball bearings 30, which in turn sit in the side walls 32.

In the cylindrical interior of the rotary piston is an output shaft 38, which consists of a hollow part 38a and a with this screwed solid part 38b (Figure 2). The hollow part 38a is in operation with a device for Generating a fuel mixture connected, e.g. a carburetor, a manifold injector or the like. The generated mechanical power is preferably taken from the solid part 38b. The output shaft is through two in the side walls 32 seated ball bearings 40 mounted coaxially to the bore 12.

The rotary piston 18 has two axially extending slots, which are each penetrated by a plate-shaped slide 42 and 44, which run radially with respect to the axis 46 of the output shaft and on their end faces by strip-shaped Seals 48 are sealed with respect to the wall 14 of the bore 12 are. Sealing strips, not shown, can be installed on the sides be provided.

One slide 42 is firmly connected to the output shaft 38, while the second slide 44 is connected to it Bearing rings 50 is pivotably mounted on the output shaft, which has a collar 52 between the bearing rings 50. The end faces of the bearing rings 50 are through. Ring seals are sealed against the insides of the side walls 32 in question.

The slides 42 and 44 are mounted in the slots of the rotary piston 18 by pivotable slide bearings 56. The plain bearings 56 contain, as shown, semi-cylindrical strips which are mounted in corresponding recesses in the end faces of the rotary piston 18 forming the slots and which in turn contain a sealing strip 60 made of bearing metal or the like, which are pressed by a spring 62 against the side walls of the slides.

Each slide includes an intake passage 64, the one communicating with the interior of the hollow output shaft Has an inlet opening and an outlet opening in communication with the interior of the rotary piston. The outlet opening of the intake duct 64 is located on the rear side of the slide in the direction of rotation (arrow) at such a distance from the outside of the output shaft, so that it is never connected to the area between the outside which serves as the combustion chamber of the rotary piston 18 and the wall 14 of the bore 12 can come into contact.

Each slide also contains at least one overflow channel 66 with an inlet opening 68 on the front side of the slide in question in the direction of rotation and an outlet opening 70 on the rear side of the slide in the direction of rotation. The inlet opening is closer to the output shaft than the exit port. How the openings are to be arranged will be explained later.

The housing 10 also has an opening 72 for an ignition device (not shown), for example a spark plug with a face

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spark gap exposed on the side. Furthermore, the housing has an outlet opening 74 for the exhaust gases, which, seen in the direction of rotation, is an angular distance of slightly more than 180 ° (in the case of the illustrated Embodiment about 110 °) from the location of the opening 72 for the ignition device.

As can be seen from FIG. 3, the slide 42, which is firmly connected to the output shaft 38, has in the illustrated embodiment an intake duct 64 and two overflow ducts. In the case of the pivotably mounted slide 44, there is a wide central one Overflow channel and two laterally arranged narrower intake channels provided by the bearing rings 50 and Guide slot-shaped openings in the output shaft corresponding to the swivel angle range of the slide 44 (in Figure 1 shown in dashed lines).

In the following explanation of the mode of operation of the machine described and the arrangement of the various openings and the like, reference is made to the angular position of the slide 42 firmly connected to the output shaft with reference to FIG. 1: In the 0 ° position of the slide 42 (FIG ) the outlet opening of the suction channel 64 of the slide 42 is closed by the rotary piston 18. The overflow channel 66 of the slide 42 is only in communication with the space between the rotary piston and the wall 14 and is therefore ineffective. In the course of the further rotation of the output shaft, the outlet opening of the intake channel 64 is opened, starting at approximately 35 °. Mixture is now sucked in through the hollow output shaft 38 and the intake channel 64 into a continuously increasing intake space A between the output shaft 38, the rotary piston 18 and the rear of the slide 42. The suction process continues to about the 180 ° position, then the sucked gas mixture between the back of the slide 42 and the front of the slide 44 »which passes through the 0 ° position when the slide 42 goes through 180 °, in the Room A ¹ (to the left of the 180 ° line in FIG. 1). At about 325 °, the outlet opening of the intake channel 64 of the slide 42 is closed by the rotary piston 18, and the gas mixture in the steadily decreasing space A ¹ is now through the front of the slide 44, the

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has meanwhile passed through the 18G ° position, compressed. At around 254 ° the overflow channel 66 of the slide 44 is released and the compressed mixture now flows out of the space A ^1, which has become rather small, between the front of the slide 44, the inside of the rotary piston 18 and the outside of the output shaft 33 into a pinch-shaped combustion chamber Y , which is in connection with the ignition device. In the 285 ° position of the slide 44 shown in Figure 1, the overflow channel 66 of this slide has just been closed again by the rotary piston 18 and the compressed mixture in the combustion chamber V is now through the sinning device, not shown ignited. It then expands and drives the slide 44 in the direction of the arrow. The slide 42 has meanwhile started a new suction stroke at 35 °, which proceeds as described above. After passing through the 180 ° position, it begins to convey the burned mixture in the direction of the outlet opening 74, which is finally released by the slide 44 so that the exhaust gases can flow out and are practically completely expelled by the slide 42.

The two slides work practically in the same way, so that during each revolution of the output shaft two work cycles expire. The forces exerted by the ignited, expanding mixture are vcm slide 42 directly and from The slide 44 is transmitted to the output shaft via the rotary piston 18 and the slide 42.

The supply of the ignitable fuel-air-G-emis ches the hollow output shaft is advantageous in two ways: First, the mixture is preheated so that complete combustion and largely pollutant-free exhaust gases are guaranteed, and secondly, the internal parts of the engine, in particular the rotary piston, without special measures effectively cooled. Since compression and expansion take place at the same time, the present engine runs very well quiet, and no large centrifugal masses are required. The motor works with very little wear, as the slides

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circulate centrally in a cylindrical space and therefore always stand vertically on the wall of the housing bore.

The engine described so far runs flawlessly, but it can still be improved in the following ways:

The eccentricity of the rotary piston rotating about the axis 18a 18 is preferably selected, as shown, so that the rotary piston cuts somewhat into the housing, the wall 14 is therefore preferably not completely cylindrical, but rather has a flat cylindrical recess symmetrical to the surface line 20, into which the outside of the rotary piston 18 fits. By this measure firstly, the seal on the surface line 20 is facilitated and, secondly, it is avoided that the end faces of the Hit the slider on the sides of the round rod 24.

After the compressed mixture has flowed over from the space A ¹ into the space V, a gas residue still remains in the gusset 76 shown in FIG. 1. This gas residue escapes with normal tolerances through the inevitable leaks. However, measures can also be taken to allow this residual gas to escape in a controlled manner. For example, as is only shown in FIG. The pin can be pushed outwards by a spring or by centrifugal force and is prevented from falling out of the bore by partially cutting into the slide. It can be inserted into the bearing rings 50 from the inside before the drive shaft is pushed through it. When the slide rotates further to the right from the position shown in FIG ^{1 can} overflow.

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After overflowing the outlet opening in the gusset 80 Remaining exhaust gases can escape through slot-like millings 82 in the wall 14.

With regard to the arrangement of the outlet opening 74, the following should also be noted: Before a slide reaches the outlet opening, the exhaust gases are trapped between it and the preceding valve. The protruding from the rotary piston 18 Part of the slide closer to the outlet opening 74 is initially larger than the corresponding part of the trailing slide. However, the area of the preceding slide exposed to the exhaust gases becomes smaller and smaller and that of the trailing slide Slide continuously bigger. The outlet opening is now preferably arranged so that it is straight from the preceding slide is reached when there is an equilibrium of forces, otherwise work against the on the front of the trailing slide acting forces that strive to inhibit the rotation, must be made. The forces of the Abgaee on those enclosing them Sliders can be used to control the running properties of the engine. The outlet port 74 will generally be located at an angle less than 110 °, e.g., diagonally opposite opening 72 for the igniter.

To seal between the outside of the output shaft and the inside of the rotary piston, between these parts a thin leaf spring can be inserted, which has the shape of a part of a straight line delimited by two axparallel lines Circular cylinder with a radius slightly smaller than the Radius of the outer surface of the output shaft is, has.

The embodiment described can of course still be modified in a wide variety of ways without the To exceed the scope of the invention.

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Claims (5)

Claims Rotary internal combustion engine with a housing, which has a bore in which a rotary piston is rotatably mounted, further with a number of slides, the at least are approximately radially displaceable in the rotary piston and with their end faces close to a wall of the housing bore slide, and with an output shaft which is coupled to the rotary piston, marked d u r eh. a) the wall (14) of the housing bore (12), on which the end faces of the slides (42, 44) slide, is cylindrical; b) the rotary piston (18) i3t a hollow cylinder which is eccentric to the inner wall of the housing is rotatably mounted about its axis (18a) and with its outside along a surface line (20) the wall of the housing bore is slidably sealed with respect to it; c) the output shaft is coaxial with respect to the housing bore (12) and at least in one up to the housing bore extending part (38a) designed as a hollow shaft, it also has a cylindrical outer side that the cylindrical Inside of the rotary piston slidably and sealingly touched; d) there are two plate-shaped slides (42, 44), one of which (42) is firmly connected to the output shaft (38), radially from this to the wall (14) of the bore (12) of the housing protrudes and by means of a first sealed pivotable slide bearing (56) through an axially extending slot in the hollow cylindrical rotary piston (18) is passed, while the other (44) with the the end facing away from the wall (14) of the bore (12) can be pivoted . mounted on the outside of the output shaft (38) and by means of a second sealed pivotable slide bearing (56) is passed through a second axially extending slot in the hollow cylindrical rotary piston hill; e) each slide contains at least one suction channel (64) and at least one overflow channel (66); 509849/0416 2423949 -ιοί) the suction channel (64) leads from the inside of the hollow part (38a) of the output shaft (58) to a mouth which is located on the rear side of the slide in question in the direction of rotation is located and has such a distance from the outside of the output shaft that it is through the rotary piston (18) is closed when the slide in question is at the line of contact (0 ° position) between the output shaft and the inner wall of the rotary piston; g) the overflow channel (66) has an inlet opening (68) the front side of the slide in the direction of rotation and an outlet opening (70) on the rear side in the direction of rotation Side of the slide; the latter is further away from the output shaft than the former; h) a gusset-shaped Eaum (V) of the housing bore, which passes through the wall (14) of the bore (12) of the housing, the outside the rotary piston (18) and a slide (e.g. 44) when this is in one position (e.g. 285 °), in which the overflow channel has just been closed again by this in the course of the rotation of the rotary piston is, is limited; and i) the housing bore has an outlet opening (74), which is approximately is arranged opposite the ignition device. 2. Rotary vane internal combustion engine according to claim 1, characterized in that the output shaft (38) consists of a hollow part (38a) and one with this releasably connected massive part (38b) consists. 3. Rotary vane internal combustion engine according to claim 1 or 2, characterized in that the slide (42) firmly connected to the output shaft has a contains intake duct (64) arranged axially approximately in the middle and two overflow ducts (66) arranged laterally thereof, and that the slide (44) pivotably mounted on the output shaft has an overflow channel arranged axially approximately in the middle and has two suction channels arranged to the side of this, 509849/0416 which are connected to the inside of the output shaft via slots in the output shaft running in the circumferential direction stand. 4. Rotary vane internal combustion engine according to claim 1, characterized in that the other slide (44) is connected to two bearing rings (50) which are pivotably mounted on the output shaft. 5. Rotary vane internal combustion engine according to claim 1, 2, 3 or 4, characterized in that the outlet opening (74) is arranged so that it is from a Slide for the exhaust gases is opened when both slide (42, 44) protrude from the rotary piston (18) about the same distance. 509849/04 16