RU2426897C2 - Rotary-piston internal combustion engine - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: rotary-piston internal combustion engine E1 includes outlet shaft 1, rotor, housing 4, annular working chamber 5, inlet hole 11, outlet hole 12 and fuel injector 14. Annular working chamber 5 is formed by means of rotor and housing for formation of inlet working chamber, compression working chamber, working combustion chamber and outlet working chamber. Element for creation of pressure/element under pressure is provided on rotor for partitioning of annular working chamber. Back-and-forth partitioning elements 7, 8 are provided in housing for partitioning of annular working chamber. Shifting device is provided to shift back-and-forth partitioning element in the direction of extended position. Element for creation of pressure/element under pressure includes arc-shaped partitioning element 6 which has the first and the second inclined surfaces and front sliding surface. Back-and-forth partitioning element has the first and the second sliding surfaces creating the contact with the first and the second inclined surfaces of arc-shaped partitioning element 6, and the front sliding surface.

EFFECT: smaller sizes and higher efficiency of engine.

19 cl, 46 dwg

Description

 FIELD OF THE INVENTION

The present invention relates to a rotary piston internal combustion engine, in particular to a unidirectional rotary engine, in which an annular working chamber is formed by one or both parts of the side walls of the rotor in the axial direction of the output shaft and housing; the rotor contains at least one pressure generating element (and to which pressure is applied), which sections the annular working chamber, and the housing contains at least one working chamber sectioning element, thereby realizing size reduction, high output power, and also improved combustion efficiency and output characteristics, as well as sealing and lubrication properties.

State of the art

Reciprocating reciprocating induction motors are often used due to their excellent gas impermeability from combustion and lubrication properties. However, the reciprocating induction motor often has a complex structure, large size, high manufacturing costs and causes vibration. It is difficult to realize complete combustion in a reciprocating induction motor, since the available working cycles depend on the angle of rotation of the crankshaft, not more than 180 degrees. Moreover, the properties of the crank mechanism set an upper limit on the conversion efficiency from the pressure of the gas generated from combustion to the output power (torque, horsepower). The radius of the crank is determined in accordance with the working volume of the cylinder. It is difficult to increase the radius of the crank and, accordingly, the output characteristics. In addition, in the case of a four-stroke engine, every two revolutions of the crankshaft create one working cycle, which prevents the engine from being reduced in size. To cope with this, the engine speed is increased for higher horsepower output. This is disadvantageous since the efficiency of combustion decreases as the engine speed rises.

Over the past 130 years or so, various rotary engines (rotary piston internal combustion engines) have been proposed. However, they are all imperfect, with the exception of the Wankel rotary engine. Rotary engines are divided into two main groups, including a unidirectional rotary engine in which the rotor does not have an eccentric movement, and a Wankel rotary engine in which the rotor has an eccentric movement.

About 12 years ago, the inventor proposed a rotary piston engine, mentioned in Patent Document 1 (WO96 / 11334), which has an annular working chamber outside the outer boundary of the rotor. The rotor contains a pressure generating element (and to which pressure is applied), sectioning the annular working chamber. The housing contains the first and second oscillatory partitions, which section the annular working chamber, while the first partition opens / closes the auxiliary combustion chamber. Two sets of spring sets for elastic displacement of the first and second partitions, respectively, are provided.

With this rotary engine, an annular working chamber formed outside the outer boundary of the rotor and two sets of spring sets increase the size of the engine. The first and second partitions and the rotor create a linear contact, rather than an area contact, with problems associated with sealing and lubrication properties.

In contrast, Patent Documents 2-5 proposed various unidirectional rotary piston engines. The rotary engine described in Patent Document 2 (Japanese Patent Laid-Open Publication S52-32406) has a practically 240 degree inlet / compression arcuate groove formed on the rotor side wall, a spring biased partition, and an inlet / compression sectional groove, an arcuate groove expansion / release formed on the outer boundary of the rotor, and a compression / explosion chamber formed in the protrusion of the housing.

A rotary motor according to Patent Document 3 (US Pat. No. 5,979,395) is a rotary vane rotor motor having a rotor mounted asymmetrically to the center in the round holding bore of the housing, an output shaft passing through the center of the motor, eight blades mounted on the rotor radially reciprocally, and an auxiliary combustion chamber formed on the side of the outer border of the circular holding hole.

The rotary engine according to Patent Document 4 (Japanese Patent Laid-Open Publication No. H10-614 02) has a rotor concentrically mounted in a round holding hole of the housing, an intake groove formed by cutting the outer edge of the rotor in an arc-shaped (crescent-shaped) shape, a partition mounted on the housing and adjacent to the outer boundary of the rotor, and a cam mechanism for radial movement of the partition.

The rotary motor according to Patent Document 5 (Japanese Patent Laid-Open Publication No. 2002-227655) has a housing, an almost oval rotor held in a circular holding chamber of the housing, two baffles movable by springs, a synchronization rotor held in a circular opening adjacent to the circular holding chamber by means of the middle side plate, an arched main combustion chamber formed on the outer boundary of the synchronization rotor, an auxiliary combustion chamber formed outside The current boundary is the basis of the combustion chamber, a spark plug opposing the auxiliary combustion chamber, and a secondary injection nozzle. The air-fuel mixture under pressure by means of a rotor in the intake / compression chamber is introduced into the auxiliary combustion chamber, where it is compressed and ignited. The gas generated from the combustion is introduced into the expansion / exhaust chamber from the circular holding chambers by the main combustion chamber, enabling the gas generated from the combustion to perform work on the rotor.

SUMMARY OF THE INVENTION

Problems to be Solved by the Invention

It is difficult to maintain the sealing property or to ensure the lubrication property when lubricating oil is supplied to the sliding parts, as well as the strength of the structure in which the front edge of the swinging partition, which sections the working chamber, creates linear contact with the outer boundary of the rotor for sealing, as in a rotary engine according to Patent Document 1. The rotary engine according to Patent Document 2 has an expansion / exhaust groove (working combustion chamber) on the outer peripheral side of the engine, which enlarges the engine. The working cycle covers an angle of rotation of approximately 120 degrees of the output shaft, thereby making it difficult to obtain complete combustion. The rotor receives not only direct torque, but also reverse torque in the subsequent stage of the working cycle, which does not increase the output characteristics. Moreover, the compression / explosion section extends significantly upward, increasing the height of the engine. An arcuate inlet / compression groove is formed on the side wall of the rotor; however, the working combustion chamber is not located with inefficient use of the space of the side wall of the rotor.

The rotary motor according to Patent Document 3 has a working chamber on the outer peripheral side of the rotor, increasing the size of the motor. Forward torque is formed to drive the rotor while the engine is spinning. The gas generated from combustion in the blade elements between the blades forms not only direct torque, but also a significant reverse torque, making it difficult to increase the output characteristics.

The rotary engine according to Patent Document 4 has a working combustion chamber at the outer boundary of the rotor, which increases the size of the engine. The cylindrical baffle creates a linear contact with the outer boundary of the rotor, which prevents the gas generated from combustion from being sealed or increasing its strength.

The high baffle plate and cam mechanism leading it protrude upward, significantly increasing the height of the engine. Not only forward torque, but also reverse torque is formed in the subsequent stage of the working cycle, making it difficult to increase the output characteristics.

The rotary motor according to Patent Document 5 has an oval rotor with a rotor head having a large curvature. When the engine rotates at a higher speed, the baffle cannot follow the rotation of the rotor and can jump. The working chamber is formed on the outer peripheral side of the rotor. A radial partition that sections the working chamber is provided on the outer peripheral side of the rotor, thereby increasing the size of the motor.

The unidirectional rotary engine of the prior art has taken the form of a rotary engine having a working chamber in the gap on the outer peripheral side of the rotor. The size of the engine has never been successfully reduced due to the insufficient use of the lateral space of the rotor in the axial direction of the output shaft to form an annular working chamber. It is also difficult to increase (expand) the cycle to an angle of rotation exceeding 180 degrees of the output shaft, which sets the upper limit of the combustion efficiency. Moreover, the rotor cannot be shared between multiple engine sets.

The objective of the present invention is to provide a rotary piston engine, which is advantageous from the point of view of size reduction, to provide a rotary piston internal combustion engine having movably moving parts making contact across the area for sealing, to provide a rotary piston internal combustion engine efficiently using the space of the sidewall of the rotor of the output shaft to form an annular working chamber, provide a rotary piston engine internal combustion, having a sufficiently large working cycle, and provide a rotary piston internal combustion engine in which the rotor is shared by several engines.

Problem Solver

The problem is solved by creating a rotary piston internal combustion engine containing an output shaft, a rotor connected to the output shaft without relative rotation, a housing supporting rotatably the output shaft, an annular working chamber formed by a rotor and a housing for forming an inlet working chamber, a working compression chamber, a working combustion chamber and a working exhaust chamber, at least one pressure generating element (under pressure) provided on the rotor for the section ringing the annular working chamber, for compressing the incoming air in the working compression chamber and for receiving gas pressure from the gas generated from combustion in the working combustion chamber, at least one sectioning element of the working chamber provided in the housing for sectioning the annular working chamber, inlet an opening for intake of intake air into the annular working chamber, an outlet for discharging gas from the annular working chamber and means for supplying fuel, wherein the compressed air-fuel mixture is recovered ignited by a spark plug or by compression ignition,

according to the invention

an annular working chamber is formed in the axial direction of the output shaft by means of a housing and parts of the side wall of the rotor and has a fully or substantially cylindrical inner wall and a completely or substantially cylindrical outer wall;

said working chamber sectioning element comprises a reciprocating sectioning element that reciprocates parallel to the axis of the output shaft between the extended position where it sections the annular working chamber and the retracted position where it is brought out of the annular working chamber;

a shifting means for shifting the reciprocating sectioning element in the direction of the extended position;

wherein said pressure-generating element (under pressure) comprises an arcuate sectioning element having a first inclined surface for moving the reciprocating sectioning element from the extended position to the retracted position, the front sliding surface extending from the first inclined surface, and the second inclined surface, extending from the front sliding surface and allowing the reciprocating sectioning element to return from the allotted Assumption in the extended position,

while part of the side wall of the rotor has a wall surface parallel to a plane perpendicular to the axis of the output shaft, and

the reciprocating sectioning element has at its front end a first sliding surface for making tight contact with the first inclined surface of the arcuate sectioning element, a front sliding surface for making tight contact with the wall surface that is parallel to the specified plane perpendicular to the axis of the output shaft, and the second surface sliding, designed to create a tight contact with the second inclined surface of the arcuate eleme NTA partitioning.

Preferably, the annular working chamber comprises an annular groove machined in the housing and has a rectangular half-profile in a plane containing the axis of the output shaft, while part of the annular side wall of the rotor closes the annular groove.

Preferably, the annular working chamber has a rectangular half-profile with arched rounded corners in a plane containing the axis of the output shaft, and comprises a shallow annular groove formed in the part of the side wall of the rotor and a deep annular groove formed in the housing; wherein the shallow annular groove has a first annular wall on a plane perpendicular to the axis of the output shaft, and inner and outer corner walls that are at the inner end and at the outer end of the first annular wall; and the deep annular groove has a cylindrical inner wall, a cylindrical outer wall, a second annular wall on a plane perpendicular to the axis of the output shaft, and inner and outer corner walls that are on the inner side and on the outer side of the second annular wall.

Preferably, an engaging guide mechanism is provided to prevent the reciprocating sectioning member from moving in the circumferential direction and allowing the reciprocating sectioning member to move parallel to the axis of the output shaft.

Preferably, the biasing means comprises a pneumatic spring biasing the reciprocating sectioning element in the direction of the extended position.

Preferably, an annular working chamber is provided on each side of said rotor in the axial direction of the output shaft, and each annular working chamber is provided with a pressure generating element (under pressure) and a working chamber sectioning element, respectively.

Preferably, the arcuate sectioning member has an inner side sliding surface that makes contact with the cylindrical inner wall, and an outer side sliding surface that makes contact with the cylindrical outer wall, with each of the inner and outer side sliding surfaces, as well as the front sliding surface of the arcuate sectioning element, provided one or more grooves for installing a seal into which lubricating oil is supplied, one or more sealing lementov movably mounted in the grooves for the installation of the seal.

Preferably, the reciprocating sectioning member has an inner side sliding surface and an outer side sliding surface, wherein the inner and outer side sliding surfaces, as well as the first, front and second sliding surfaces of the reciprocating sectioning member, are provided with one or more grooves for installing a seal into which lubricating oil is supplied, wherein one or more sealing elements are movably mounted in grooves for installing the seal Eden.

Preferably, the leading edge of the first inclined surface of the arcuate sectioning element is on a line orthogonal to the axis of the output shaft, the first inclined surface has a slope in the circumferential direction linearly decreasing in the radially outward direction, the rear edge of the second inclined surface of the arcuate sectioning element is on the line orthogonal to the axis of said output shaft, and the second inclined surface has a slope in the direction of the circle, linearly decreasing radially outwardly m direction.

Preferably, the housing is provided with a first reciprocating sectioning element and a second reciprocating sectioning element spaced from said first reciprocating sectioning element by at least 180 degrees in the direction of rotation of the rotor.

Preferably, an auxiliary combustion chamber is provided in the housing wall portion, an inlet is formed in the housing portion next to the second reciprocating sectioning element at the front side of the rotor axis, and an exhaust hole is formed in the housing portion next to the second reciprocating sectioning element at the rear side of the rotor axis .

Preferably, when the pressure generating member (under pressure) is between the inlet and the first reciprocating sectioning member, the inlet working chamber is formed between the second reciprocating sectioning member and the pressure generating member (under pressure), and the compression working chamber is formed between a pressure generating element (under pressure) and a first reciprocating sectioning element in the annular working chamber; and

when said pressure-generating element (under pressure) is between the first reciprocating sectioning element and an outlet, a combustion chamber is formed between the first reciprocating sectioning element and a pressure generating element (under pressure), and a discharge working chamber is formed between the creating element pressure (under pressure) and the second reciprocating sectioning element in the annular working chamber.

Preferably, the fuel supply means has a fuel injector for injecting fuel into the working combustion chamber, and a spark plug is provided for igniting the fuel-air mixture in the auxiliary combustion chamber.

Preferably, said fuel supply means has a fuel injector for injecting fuel into said auxiliary combustion chamber.

Preferably, the fuel supply means has a fuel injector providing additional fuel injection into the working combustion chamber.

Preferably, an inlet channel is provided for connecting the working compression chamber to the auxiliary combustion chamber, a two-position valve of the inlet channel for opening / closing the inlet channel, an exhaust channel for discharging gas generated during combustion in the auxiliary combustion chamber into the working combustion chamber, and a two-position valve of the exhaust channel for opening / closing the exhaust channel.

Preferably, a plurality of valve actuating means is provided for driving the on-off valve of the inlet channel and the on-off valve of the exhaust channel in synchronization with the rotation of the output shaft.

Preferably, the sectioning element of the working chamber comprises an auxiliary combustion chamber formed in the reciprocating sectioning element.

Preferably, the fuel supply means has a fuel injector for injecting fuel into the auxiliary combustion chamber, wherein the air-fuel mixture in the auxiliary combustion chamber is ignited by compression ignition.

Advantages of the Invention

The operation and advantages of the engine of the present invention are described below.

An annular working chamber is formed by at least one of the parts of the side wall of the rotor and the housing. The annular working chamber is hermetically partitioned by at least one pressure generating element (and to which pressure is applied) provided on the rotor, and at least one working chamber sectioning element provided in the housing. The pressure generating element (and to which pressure is applied) compresses the intake air together with the sectioning element of the working chamber and receives the pressure of the gas generated from combustion as the rotor rotates.

As the rotor rotates, the reciprocating sectioning element reciprocates between the extended position and the retracted position, while contacting the first inclined surface, the front sliding surface and the second inclined surface of the arcuate partition in series.

For example, when the pressure generating element (under pressure) consists of an arched sectioning element, and the working chamber sectioning element consists of a reciprocating sectioning element, the arched sectioning element has an inner peripheral side sliding surface that makes area contact with the inner peripheral surface of the annular working cameras, the outer peripheral lateral surface of the slide, creating contact in area with the outer peripheral surface thu annular working chamber, and the front sliding surface, creating contact in area with the lateral ring wall of the housing of the annular working chamber. The reciprocating sectioning element has a front sliding surface that makes area contact with the side annular wall of the rotor. The reciprocating sectioning element does not perform relative movement with respect to the housing in the circumferential direction, which is advantageous for sealing. An engaging guide mechanism may be provided to delay the relative movement of the reciprocating sectioning element with respect to the housing in a circumferential direction.

An annular working chamber is formed by at least one part of the side wall of the rotor and the housing. Therefore, there is no element that protrudes strongly outward from the outer boundary of the rotor, which helps to reduce the size of the internal combustion engine. Both the arched sectioning element and the reciprocating sectioning element can create an area contact with the walls of the annular working chamber, easily providing sealing and lubrication properties.

An annular working chamber is formed by at least one part of the side wall of the rotor in the axial direction of the output shaft and the housing. Therefore, the annular working chamber may have a maximized radius within the diameter of the rotor. In this case, the radius from the output shaft to the pressure generating element (under pressure) that receives the pressure of the gas generated from combustion (which corresponds to the radius of the crank) can be significantly larger than the radius of the crank of the reciprocating engine. The pressure of the gas generated from the combustion is converted to the output characteristics (torque, horsepower) with much greater efficiency, obtaining an internal combustion engine having a high economic fuel efficiency.

For example, when the rotor contains one arcuate sectioning element, and the housing contains two reciprocating sectioning elements, each one rotation of the output shaft creates a working cycle, which reduces the working volume of the cylinder to half the working volume of the cylinder of a four-stroke engine, realizing a much smaller engine. The working cycle can cover an angle of rotation of about 180 ° or more of the output shaft. A long combustion period and increased combustion efficiency can be realized. An annular working chamber can be provided on either side of the rotor, and one rotor can be shared by two blocks of an internal combustion engine, advantageously to achieve a smaller internal combustion engine with high power.

On the other hand, when a large part of the annular working chamber is formed in the rotor, it is preferable that the rotor contains a reciprocating sectioning element as a pressure generating element (under pressure), and the housing contains an arcuate sectioning element as a sectioning element of the working chamber. In this case, the same benefits can be expected as described above.

The following various designs may be applied to the present invention.

(1) An annular working chamber may constitute an inlet working chamber, a compression working chamber, a combustion working chamber and an exhaust working chamber by means of a pressure generating element (under pressure) and a working chamber sectioning element.

(2) A part of the side wall of the rotor is a part of the side wall of a larger diameter having a radius of 0.5 R or higher from the axis of the output shaft, with R being the radius of the rotor.

(3) The annular working chamber consists of an annular groove machined in the housing, the edge of the hole being opposed to the rotor and having a rectangular half profile in the plane containing the axis of the output shaft, and the annular wall of the rotor closes the edge of the opening of the annular groove.

(4) The annular working chamber has a rectangular half-profile with arched rounded corners in a plane containing the axis of the output shaft, and consists of a shallow annular groove formed in the rotor and a deep annular groove formed in the housing; a shallow annular groove has a first annular wall on a plane perpendicular to the axis of the output shaft, and inner and outer corner walls that are on the inner peripheral side and on the outer peripheral side of the first annular wall; and the deep annular groove has an inner cylindrical wall, an outer cylindrical wall, a second annular wall in a plane orthogonal to the axis of said output shaft, and inner and outer corner walls that are on the inner peripheral side and on the outer peripheral side of the second annular wall.

(5) An engaging guide mechanism that prevents the reciprocating sectioning member from moving in a circumferential direction and allowing the reciprocating sectioning member to move parallel to the axis of the output shaft is provided.

(6) The biasing means consists of a pneumatic spring biasing the reciprocating sectioning element in the direction of the extended position.

(7) An annular working chamber is provided on each side of the rotor in the axial direction of the output shaft, and these annular working chambers are both equipped with a pressure generating member (under pressure) and a working chamber sectioning member.

(8) The annular working chamber has a wall parallel to a plane orthogonal to the axis of the output shaft; and the reciprocating sectioning element has at its front end a first sliding surface for making tight contact with the first inclined surface of the arcuate sectioning element, a front sliding surface for making tight contact with the wall of the annular working chamber, which is parallel to the plane perpendicular to the axis of the output shaft, and the second surface sliding to create a tight contact with the second inclined surface of the arcuate sectioning element.

(9) The arcuate sectioning element has an inner peripheral lateral sliding surface that makes contact with the inner peripheral wall, and an external peripheral lateral sliding surface that makes contact with the outer peripheral wall, and the inner and outer peripheral lateral sliding surfaces of the arcuate sectioning element equipped with a groove for installing the seal into which lubricating oil is supplied and with one or more sealing elements movably mounted in the installation groove seals.

(10) In the above (8), the reciprocating sectioning member has an inner peripheral side sliding surface and an outer peripheral side sliding surface, and an inner and outer peripheral side sliding surface, as well as the first, front and second sliding surfaces of the reciprocating sectioning member all equipped with one or more grooves for installing seals into which the lubricating oil is supplied, and one or more sealing elements movably mounted in the groove ah to install the seal.

(11) In the above (8), the leading edge in the direction of rotation of the rotor of the first inclined surface of the arcuate sectioning element is on a line perpendicular to the axis of the output shaft, the first inclined surface has an inclination in the direction of the circle, gradually decreasing in the radially outward direction, the rear edge in the direction of rotation the rotor of the second inclined surface of the arcuate sectioning element is on a line perpendicular to the axis of the output shaft, and the second inclined surface has an inclination in circumference, gradually decreasing radially outward direction.

(12) The pressure generating element (under pressure) provided in the rotor consists of an arcuate sectioning element, and the housing is equipped as a working chamber sectioning element with a first reciprocating sectioning element and a second reciprocating sectioning element spaced from the first the reciprocating sectioning element is at least 180 degrees in the direction of rotation of the rotor.

(13) In the above (12), an auxiliary combustion chamber is formed in a part of the housing wall on the side of the output shaft, and not in the first reciprocating sectioning element, an inlet is formed in the housing part next to the second reciprocating sectioning element on the front side in the direction rotor rotation, and not in the second reciprocating sectioning element, and the outlet is formed in the body part next to the second reciprocating sectioning element in the rear s side in the rotor rotation direction than the second reciprocating partitioning member.

(14) In the above (13), when the pressure generating member (under pressure) is between the inlet and the first reciprocating sectioning member, the intake working chamber is formed between the second reciprocating sectioning member and the pressure generating member (under pressure) and the compression working chamber is formed between the pressure generating element (under pressure) and the first reciprocating sectioning element in the annular working chamber; and when the pressure generating element (under pressure) is between the first reciprocating sectioning element and the outlet, the combustion chamber is formed between the first reciprocating sectioning element and the pressure creating element (under pressure), and the exhaust working chamber is formed between the element creating pressure (under pressure) and the second reciprocating sectioning element in the annular working chamber.

(15) In the above (14), the fuel supply means has a fuel injector for injecting fuel into the compression working chamber.

(16) In the above (14), the fuel supply means has a fuel injector for injecting fuel into the auxiliary combustion chamber.

(17) In the above (15), the fuel supply means has a fuel injector that further sprays fuel into the working combustion chamber.

(18) In the above (14), an inlet channel is provided for connecting the working compression chamber to the auxiliary combustion chamber, a two-position valve of the inlet channel for opening / closing the inlet channel, an exhaust channel for discharging the gas generated from the combustion in the auxiliary combustion chamber into the working combustion chamber and a two-position valve of the outlet channel for opening / closing the outlet channel.

(19) In the above (18), there are provided means for driving several valves for driving the on-off valve of the inlet channel and the on-off valve of the exhaust channel in synchronization with the rotation of the output shaft.

(20) The sectioning element of the working chamber consists of a reciprocating sectioning element, and the auxiliary chamber is formed in the reciprocating sectioning element.

(21) The pressure generating element (under pressure) consists of a reciprocating sectioning element, the housing is equipped, as a sectioning element of the working chamber, with one or more arcuate sectioning elements, and the auxiliary combustion chamber is formed of at least one of the arcuate sectioning elements.

(22) The rotor is equipped, as a pressure generating element (under pressure), with one of the arcuate sectioning elements; the housing is equipped, as a sectioning element of the working chamber, with one reciprocating sectioning element; an inlet is formed in a part of the housing on the front side in the direction of rotation of the rotor, and not in the reciprocating sectioning element, and an outlet is formed in the housing next to said reciprocating sectioning element in the rear side in the direction of rotation of the rotor, and not in the reciprocating translational sectioning element; and an inlet valve for opening / closing the inlet and an outlet valve for opening / closing the outlet is provided.

(23) In the above (11), the rotor is equipped, as a pressure generating element (under pressure), with two arcuate sectioning elements spaced apart from each other by about 180 degrees in the direction of rotation of the rotor.

(24) In the above (12), the rotor is equipped, as a pressure generating element (under pressure), with three arched sectioning elements provided in three equally spaced circumferential positions.

(25) The rotor is equipped, as a pressure generating element (under pressure), with four arcuate sectioning elements provided in four equally spaced circular positions, and the housing is equipped, as a working chamber sectioning element, with four reciprocating sectioning elements provided in four equidistant positions on a circle; inlet openings are formed in the housing near the front ends in the direction of rotation of the rotor by two reciprocating sectioning elements spaced 180 degrees in the circumferential direction, and outlet openings are formed in the housing near the rear ends in the direction of rotation of the rotor.

(26) Several annular working chambers having different sizes are provided in at least one part of the side wall of the rotor concentrically with radial intervals, the rotor is equipped with at least one pressure generating element (and to which pressure is applied), which sections each annular working chamber, and the housing is equipped with at least one sectioning element of the working chamber, which sections each annular working chamber.

(27) The fuel supply means has a fuel injector for injecting fuel into the auxiliary combustion chamber, and the air-fuel mixture in the auxiliary combustion chamber is ignited by compression ignition.

The above-described structures, other basic structures and modified embodiments of the invention, as well as their operations and results of operations, are described in detail using the embodiments explained below.

Brief Description of the Drawings

1 is a right side view of a rotary engine according to an embodiment of the present invention.

Figure 2 is a vertical cross-sectional view of a rotary engine.

Figure 3 is a schematic perspective view of a rotor.

Figure 4 is a schematic perspective view of a housing.

5 is a vertical cross-sectional front view of a rotary engine.

6 is a view in cross section along the line VI-VI in figure 1.

Fig.7 is a view in cross section along the line VII-VII in Fig.1.

Fig. 8 is an illustration for explaining a mode of operation of an arcuate sectioning element and a first reciprocating sectioning element.

9 is an illustration for explaining an operation mode of an arcuate sectioning element and a first reciprocating sectioning element.

Figure 10 is a side view of the base part of the rotor, which includes an arcuate sectioning element.

11 is a perspective view of a first reciprocating sectioning member and a guide of a first air spring.

12 is a perspective view of a front portion of a first reciprocating moving sectioning member.

13 is a cross-sectional view showing an outer peripheral lateral sliding surface of a first reciprocating sectioning member.

Fig. 14 is a cross-sectional view along the circumference of the base part including the auxiliary combustion chamber, the inlet and outlet channels, and the first and second on / off valves.

15 is a cross-sectional view of a base portion of an inlet channel and a first on-off valve.

Fig is a view in cross section of the base part of the exhaust channel and the second on-off valve.

17 is an illustration for explaining the operation of a rotary engine.

Fig. 18 is an illustration for explaining the operation of a rotary engine.

Fig. 19 is an illustration for explaining the operation of a rotary engine.

20 is an illustration for explaining the operation of a rotary engine.

21 is an illustration for explaining the operation of a rotary engine.

Fig. 22 is an illustration for explaining the operation of a rotary engine.

23 is an illustration for explaining the operation of a rotary engine.

24 is an illustration for explaining the operation of a rotary engine.

25 is an illustration for explaining the operation of a rotary engine.

Fig. 26 is an illustration for explaining the operation of a rotary engine.

Fig. 27 is an illustration equivalent to Fig. 6 and showing a first reciprocating sectioning element according to a second embodiment.

FIG. 28 is a cross-sectional view of a first reciprocating sectioning member and a surrounding structure according to the second embodiment.

Fig. 29 is an illustration equivalent to Fig. 28 and showing yet another first reciprocating sectioning element according to the second embodiment.

Fig. 30 is a front elevational cross-sectional view of the base portion of the annular working chamber of the third embodiment.

FIG. 31 is a radial cross-sectional view of a first reciprocating sectioning member and a surrounding structure according to the third embodiment.

Fig. 32 is a cross-sectional view along the circumference of the first reciprocating sectioning element and the surrounding structure of the third embodiment.

33 is a cross-sectional view along the circumference of the first reciprocating sectioning element and the surrounding structure of the fourth embodiment.

Fig. 34 is a cross-sectional view along the circumference of the first reciprocating sectioning element and the surrounding structure of the fifth embodiment

Fig. 35 is a cross-sectional view along the circumference of the first reciprocating sectioning element and the surrounding structure of the sixth embodiment.

Fig. 36 is a cross-sectional view in a direction orthogonal to the axis of the first reciprocating sectioning element and the surrounding structure, according to the sixth embodiment.

Fig. 37 is an illustration for explaining the operation of the first reciprocating sectioning element according to the sixth embodiment.

Fig. 38 is an illustration for explaining the operation of the first reciprocating sectioning element according to the sixth embodiment.

Fig. 39 is an illustration for explaining the operation of the first reciprocating sectioning element according to the sixth embodiment.

40 is an illustration for explaining the operation of the first reciprocating sectioning element according to the sixth embodiment.

Fig. 41 is an illustration for explaining the operation of the first reciprocating sectioning element according to the sixth embodiment.

Fig. 42 is a schematic cross-sectional view of a rotary engine in a seventh embodiment.

Fig. 43 is a schematic cross-sectional view of a rotary engine in an eighth embodiment.

Fig. 44 is a schematic cross-sectional view of a rotary engine according to a ninth embodiment.

Fig. 45 is a schematic cross-sectional view of a rotary engine of the tenth embodiment.

Fig. 46 is a schematic cross-sectional view of a rotary engine in an eleventh embodiment.

Explanation of reference numbers

1 - output shaft

2 - rotor

4 - case

5 - ring working chamber

6 - arcuate sectioning element

7, 8 - the first and second reciprocating sectioning elements

9, 10 - pneumatic spring

11 - inlet

12 - outlet

13 - auxiliary combustion chamber

15, 16 - the first and second on-off valves

18, 19 - valve driving mechanisms

25 - annular groove

25a, 25b - inner and outer peripheral walls

26 - annular wall of the rotor

41, 43 - the first and second inclined surfaces

42 - front sliding surface

58, 59 - the first and second sliding surfaces

Detailed Description of Preferred Embodiments

The present invention relates to a rotary piston internal combustion engine (referred to as “rotary engine” hereinafter) comprising an output shaft, a rotor connected to the output shaft without relative rotation, a housing rotatably supporting the output shaft, an annular working chamber formed by the rotor and the housing, at least one pressure generating element (under pressure) provided in the rotor for sectioning the annular working chamber, at least one sectioning element a working chamber provided in the housing for sectioning the annular working chamber, an inlet for introducing intake air into the annular working chamber, an exhaust outlet for discharging gas from the annular working chamber and fuel supply means for supplying fuel, wherein the compressed air-fuel mixture is ignited with using a spark plug or compression ignition.

In particular, the present invention has the following distinctive structures. The annular working chamber is formed by at least one of the parts of the side wall of the rotor in the axial direction of the output shaft and the housing and has a fully or mostly cylindrical inner peripheral wall and a fully or mostly cylindrical outer peripheral wall.

One of the pressure generating elements (under pressure) and the working chamber sectioning elements consists of a reciprocating sectioning element reciprocating parallel to the axis of the output shaft between the extended position where it sections the annular working chamber and the retracted position where it is retracted from the annular working chamber. A shifting means is provided for shifting the reciprocating sectioning member in the direction of the extended position.

Another of the pressure generating elements (under pressure) and the working chamber sectioning elements consists of an arcuate sectioning element having a first inclined surface, which brings the reciprocating sectioning element from the extended position to the retracted position, the front sliding surface extending from the first inclined surface, and a second inclined surface extending from the front sliding surface and allowing the element to reciprocate nirovany return from the retracted position to the extended position.

First Embodiment

The rotary engine of the first embodiment is described with reference to FIGS. As shown in FIGS. 1, 2 and 5, the rotary engine E has two rotary engine blocks (the right rotary engine E1 and the left rotary engine E2 in FIG. 5) sharing the output shaft 1, the rotor 2 and the rotor body 3. Rotary engines E1, E2 rotate symmetrically around a vertical center line CL passing through the central axis of the output shaft 1 and the center of the rotor 2 in the horizontal direction, as shown in FIG. 5, but the time of their respective strokes is set with a rotation phase shift of 180 °, as explained in more detail below with reference to FIGS. Accordingly, the right rotary engine E1 is described.

As shown in figures 1-7, the rotary engine E1 contains an output shaft 1, a rotor 2, equivalent to a rotary piston, a housing 4 provided on one sidewall (on the right side of FIG. 5) of the rotor 2, the rotor housing 3, an annular working chamber 5, formed by the rotor 2 and the housing 4, the arcuate sectioning element 6 provided in the rotor 2 to perform the functions of the pressure generating element (under pressure), the first and second reciprocating sectioning elements 7, 8 provided in the housing 4 for performing functions of the working chamber sectioning elements, the first and second pneumatic springs 9, 10, the inlet 11, the outlet 12, the auxiliary combustion chamber 13, the fuel injector 14, the on-off valves 15, 16 of the inlet and outlet channels, the spark plug 17, mechanisms 18, 19 actuating the valves (see Fig. 14) and the supporting frame 20.

As shown in FIGS. 1-7, the output shaft passes through the central parts of the rotor 2 and two housings 4, 4. The rotor 2 consists of a round plate of a specific thickness, having a channel 2a for cooling water in it. The rotor 2 is connected to the output shaft 1 without relative rotation by means of a cotter pin. The rotor 2 is arranged so as to be orthogonal to the output shaft 1. The rotor 2 and the housing 4 are preferably made of a metal material having excellent solid lubricating property, such as nodular cast iron; however, they can be made of other metallic materials, such as cast steel, or non-metallic materials, such as ceramics.

1-3, the rotor 2 rotates clockwise (in the direction of arrow A). "Front side" means forward in the direction of rotation of rotor 2, and "rear side" means back in the direction of rotation of rotor 2. "Axis" is the C axis of output shaft 1, unless otherwise indicated.

As shown in FIGS. 2, 3, the arcuate sectioning element 6, hermetically sectioning the annular working chamber 5, is integrally formed on one side (on the right side) of the rotor 2 in the axial direction of the output shaft 1. The arcuate sectioning element 6 is formed on the right side wall of the rotor 2 in the region of a larger diameter radially corresponding to the annular working chamber 5.

As shown in FIGS. 2, 4, 5, the annular working chamber 5 is used so as to constitute an inlet working chamber, a compression working chamber, a working combustion chamber and a working exhaust chamber. The annular working chamber 5 has an annular shape formed by the housing 4 and the rotor 2 around the axis of the output shaft 1. The annular working chamber 5 is formed by a larger diameter region of at least one (right) side wall of the rotor 2 in the axial direction of the output shaft 1 and cases 4. In other words, the annular working chamber 5 is opposed to a region of a larger diameter, at least one (right) side wall of the rotor 2, and this region of a larger diameter acts as a side wall of the rotor 2 of the annular working space EASURES 5.

The annular working chamber 5 is formed by the housing 4 and part of the side wall of the larger diameter of the rotor 2, while part of the side wall of the larger diameter has a radius of more than 0.5 R from the axis of the output shaft 1, while R is the radius of the rotor 2. This serves to in order to increase the radius (equivalent to the radius of the crankshaft) from the axis of the output shaft 1 to the arcuate sectioning element 6, receiving the pressure of the gas generated from combustion, as much as possible so as to form the maximum possible output characteristics Iki (torque, horsepower).

As shown in figure 2, 4, 5, the annular working chamber 5 consists of an annular groove 25, recessed in the housing 4 and having a rectangular half-profile in a plane containing the axis of the output shaft 1 and the annular wall 26 (including the first and second inclined surface 41 and 43, which are described below) covering the edge of the opening of the annular groove 25. The annular groove 25 has an inner peripheral wall 25a that is completely cylindrical around the axis, an outer peripheral wall 25b that is completely cylindrical around the axis, and the annular wall 25c perpendicular to the axis. The annular groove 25 may have a rectangular or square half-profile. A square is desirable for a smaller wall area, leading to increased combustion efficiency in the working combustion chamber, described below. On the other hand, a rectangle, as shown in the drawings, is desirable for less reciprocating movement of the first and second reciprocating section elements 7, 8. The rotor 2 may consist of several parts to form a channel for cooling water.

The housing 4 consists of a round element having a width of approximately two times the width of the rotor 2, and a diameter larger than that of the rotor 2. The output shaft 1 passes through the central part of the housing 4, and a bearing 27 is inserted between the output shaft 1 and the housing 4. The bearing 27 is supplied with lubricating oil through a lubrication channel formed in the wall of the housing 4. The housing 4 is placed on the output shaft 1 by means of the lock rings 28.

The housing 4 has an inlet 11 and an outlet 12. A cooling water channel 29 is formed in the housing 4. The housing 4 also has a cooling water inlet 30 and a cooling water outlet 31. The rotor housing 3 is mounted on the rotor 2 through the bearing 32 and the sealing element 33. The housing 4 is mounted in contact with the area with the side walls of the rotor 2 and the rotor housing 3. The rotor case 3 and two cases 4, 4 are connected, for example, by means of bolts 34 (see FIG. 2) inserted through them next to the outer surface of the circle.

As shown in figure 5, the housing 4 has a channel 35 for lubrication and not shown several channels for lubrication, through which the lubricating oil is supplied under pressure from an external source. The rotor 2 has an annular channel 36 for lubrication connected to the channel 35 for lubrication, and several channels 37 for lubrication connected to the annular channel 36 for lubrication. The bearing 32 is supplied with lubricating oil through channels 37 for lubrication.

The annular sealing elements 38, 39, 40 for sealing between the rotor 2 and the housing 4 are installed in the grooves for installing the seal into which the lubricating oil is supplied. The sealing elements 38-40 are preferably made of a metal material having an excellent property of wear resistance and solid lubrication.

As shown in FIGS. 2, 3, 8, 9, the arcuate sectioning element 6 integrated with the rotor 2 has a first inclined surface 41 for bringing the first and second reciprocating sectioning elements 7, 8 from the extended positions to the allotted positions, the front surface 42 sliding extending from the inclined surface 41 and a second inclined surface 43 extending from the front sliding surface 42 and allowing the first and second reciprocating sectioning elements 7, 8 to return from treated and extended positions. The first and second inclined surfaces 41, 43 are linearly inclined in a circumferential direction. The connecting part between the first inclined surface 41 and the front sliding surface 42 forms a smooth, continuous curved surface. This connecting part is placed on a line perpendicular to the axis of the output shaft 1. The connecting part between the front sliding surface 42 and the inclined surface 43 forms a continuous curved surface. This connecting part is placed on a line orthogonal to the axis of the output shaft 1. The front sliding surface 42 makes a sealed area contact with the annular wall 25c. As shown in FIGS. 3, 10, the first inclined surface 41 has a front end 41a on a line orthogonal to the axis of the output shaft 1. The end 41a has a curved surface rather than a curved surface. The first inclined surface 41 has an inclination along a circle linearly decreasing in the radially outward direction. The second inclined surface 43 has a front end 43a on a line perpendicular to the axis of the output shaft 1. The end 43a has a curved surface rather than a curved surface. The second inclined surface 43 has an inclination along the circumference, linearly decreasing in the radially outward direction. Preferably, the first inclined surface 41 has an average inclination along the circumference, for example about 1 / 5-1 / 3, and the second inclined surface 43 has an average inclination along the circumference, for example, about 1 / 4-1 / 2. In the example of FIG. 10, α> β and (α + β) are approximately 90-100 degrees. However, α = β is also acceptable.

It is possible in rotary engines that the first inclined surface 41 has an inclination along the circumference of less than 1/5, and the second inclined surface 43 has an inclination along the circumference of less than 1/4.

As shown in FIGS. 8-10, the arcuate sectioning member 6 has an inner peripheral side sliding surface 6a and an outer peripheral side sliding surface 6b. The inner and outer peripheral side sliding surfaces 6a, 6b and the front sliding surface 42 have one or more grooves for installing a seal into which lubricating oil is supplied from the annular channel 36 for lubrication, and the channels 37 for lubrication and sealing elements 44-46 movably mounted in the grooves for installing the seal, respectively. Sealing elements 44, 45 are installed near the ridge lines of the first and second inclined surfaces 41, 43, and two sealing elements 46 are installed in the front sliding surface 42. The sealing elements 44-46 are shifted in the extended position by the pressure of the lubricating oil. A structure to prevent the sealing elements 44-46 from coming off the grooves for installing the seal, or a structure for sliding the sealing elements 44-46 by means of leaf springs installed in the grooves for installing the seal, can be used appropriately.

As shown in FIGS. 2, 4, 6, a first reciprocating sectioning element 7 and a second reciprocating sectioning element 8, spaced from the first reciprocating sectioning element 7 by about 200 degrees from its front end, are provided on the housing 4. The first and second reciprocating sectioning elements 7, 8 can reciprocate between their extended position, where they section the annular working chamber 5, and their retracted position, where they are withdrawn from the annular working chamber 5, parallel to the axis of the output shaft 1. The first and second reciprocating sectioning elements 7, 8 have strength and rigidity to the gas pressure applied to them. The first pneumatic spring 9 is provided as a biasing means for shifting the first reciprocating sectioning element 7 in the direction of the extended position, and the second pneumatic spring 10 is provided as a biasing means for shifting the second reciprocating sectioning element 7 in the direction of the extended position.

As shown in FIGS. 2, 4, 6 and 11-13, the first reciprocating sectioning element 7 is hermetically and movably mounted in a guide hole 47 formed in the housing 4. The first reciprocating sectioning element 7 has an inner peripheral lateral sliding surface 50 creating a tight area contact with the inner peripheral wall 25a of the annular working chamber 5, an outer peripheral side sliding surface 51, creating a tight area contact with the outer peripheral wall 25b count the main working chamber 5, and two side walls 52 located in the planes containing the axis of the output shaft 1. The first reciprocating sectioning element 7 has a front sliding surface 53 at the front end, which makes tight contact with the annular wall 26 on the side of the rotor 2 of the annular working camera 5, the first sliding surface 58, allowing the creation of tight contact over the area with the first inclined surface 41 of the arcuate sectioning element 6, and the second sliding surface 59, allowing the creation of ue sealed contact area with the second inclined surface 43 of arcuate member 6 partitioning. The first reciprocating sectioning element 7 is made of a metal material having excellent solid lubricating property, such as nodular cast iron; However, it can be made of other metal materials.

The first sliding surface 58 has the same inclination along the circumference as the first inclined surface 41 (the inclination along the circumference decreases linearly in the radially outward direction). The second sliding surface 59 has the same inclination along the circumference as the second inclined surface 43 (the inclination along the circumference decreases linearly in the radially outward direction).

Grooves for installing a seal into which lubricating oil is supplied and sealing elements 60, 61 installed in grooves for installing a seal are provided adjacent to any end of the inner and outer peripheral side surfaces 50, 51 of the slide. The sealing elements 60, 61 are shifted in the extended position by the pressure of the lubricating oil. The front sliding surface 53 has a front end and a rear end on lines orthogonal to the axis of the output shaft 1. Grooves for installing a seal into which lubricating oil is supplied and sealing elements 62 movably mounted in grooves for installing a seal are provided near any end of the front surface 53 slip. The sealing elements 62 are biased towards the extended position by the pressure of the lubricating oil. Sealing elements 63, 64 are mounted in grooves for installing seals formed in the first and second sliding surfaces 58, 59 into which lubricating oil is supplied. The sealing elements 63, 64 are shifted in the extended position by the pressure of the lubricating oil.

The first reciprocating sectioning element 7 has a lubrication channel (not shown) in the wall into which lubricating oil is supplied from a lubrication channel (not shown) in the wall of the housing 4. Further, lubricating oil is fed into the grooves for installing the seal. A structure for preventing the sealing elements 60-64 from coming off the grooves for installing the seal, or a structure for sliding the sealing elements 60-64 using leaf springs installed in the grooves for installing the seal, can be used appropriately.

As shown in FIGS. 2, 4, 5, 7, the second reciprocating sectioning element 8 is smaller than the first reciprocating sectioning element 7. However, the second reciprocating sectioning element 8 has essentially the same structure as the first reciprocating sectioning element 7, and therefore, a detailed description thereof is omitted. The second reciprocating sectioning element 8 is hermetically and movably mounted in the guide hole 48 of the housing 4. The second reciprocating sectioning element 8 has an inner peripheral side sliding surface, an outer peripheral side sliding surface, two side walls, a front sliding surface, a first sliding surface, a second sliding surface and sealing elements, as is the case with the first reciprocating sectioning element 7.

The first air spring 9 for shifting the first reciprocating sectioning element 7 in the direction of the extended position is described below. As shown in FIG. 6, grooves for installing a seal into which lubricating oil is supplied are formed in the inner wall of the guide hole 47 to guide the first reciprocating sectioning member 7, and, for example, four sealing elements 65 are movably mounted in the mounting grooves seals.

To reduce the weight of the first reciprocating sectioning element 7 as much as possible, the first reciprocating sectioning element 7 has a rectangular hole 66 formed from the opposing end in the rotor 2. The first air spring 9 has a casing 67 attached to the housing 4, a pressure air chamber 68 in the casing 67, the guide 69, one-piece formed with the casing 67 and partially and relatively movably inserted into the rectangular hole 66, and two rods 71, hermetically and movably mounted in two x cavities 70 for guide rods 69.

The pressure air chamber 68 is filled, for example, with nitrogen gas under a pressure of 4.0-7.0 MPa. Two rods 71 receive the pressure of nitrogen gas in the pressure chamber 68, whereby their tops abut against the bottom wall of the rectangular opening 66 and strongly shift the first reciprocating sectioning element 7 in the direction of the extended position. The first air spring 9 is used to shift the first reciprocating sectioning element 7 in the direction of the extended position against the pushing force (force parallel to the axis of the output shaft 1) applied to the first reciprocating sectioning element 7 by means of gas pressure of the fuel-air mixture or gas pressure resulting from combustion. Therefore, the nitrogen gas pressure is appropriately determined based on the pushing force and the diameter and number of rods 71. The structure and shape of the pressure air chamber 68 is not limited to that shown in the drawing. However, it is desirable that the pressure air chamber 68 be as large as possible so that the pressure fluctuation of the nitrogen gas is minimized, while the two rods 71 reciprocate. The casing 67 is designed to allow the first reciprocating sectioning element 7 to be retracted to the retracted position shown by broken lines in FIG. 6. The guide 69 is beveled so as to form four ventilation holes 72 (see FIG. 11) between the inner surface of the rectangular hole 66 and the guide 69. Several metal or nonmetallic sealing elements 73 are mounted in the rods 71.

The rectangular hole 66 may be less deep than shown in the drawing, or even omitted so that one or more rods 71 abut against the end of the first reciprocating sectioning element 7. Alternatively, the pressure of the air spring can be directly applied to the first reciprocating sectioning element 7. Instead of the first pneumatic spring 9, a compression spring or a hydraulic cylinder connected to the battery can be used to shift the first reciprocating sectioning element 7 in the direction of the extended position. Additionally, alternatively, a cam mechanism synchronized with the output shaft 1 may be used to define the reciprocating movement of the first reciprocating sectioning member 7.

As shown in FIG. 7, the second air spring 10 for shifting the second reciprocating sectioning element 8 in the extended direction is slightly smaller than the first air spring 9. However, it has the same structure as the first air spring 9 and its a detailed explanation is omitted. The second pneumatic spring 10 has a casing 74, a pressure air chamber 75 in the casing 74, a guide 76 partially inserted into the rectangular hole of the second reciprocating section element 8, and two rods 77, as is the case with the first pneumatic spring 9.

The inlet 11, the outlet 12, the inlet working chamber, the compression working chamber, the combustion working chamber and the exhaust working chamber are described below. As shown in FIG. 2, the inlet 11 is formed next to the second reciprocating sectioning element 8 in the circular wall of the housing 4 on the front side, and not in the second reciprocating sectioning element 8, and the outlet 12 is formed next to the second reciprocating the translational sectioning element 8 in the circular wall of the housing 4 on the rear side, and not in the second reciprocating sectioning element 8. Holes 11, 12 can be formed in the side wall of the housing 4.

As shown in FIGS. 17-26, when the arcuate sectioning element 6 is between the inlet 11 and the first reciprocating sectioning element 7, an inlet (int) working chamber 80 is formed between the second reciprocating sectioning element 8 and the arcuate sectioning element 6, a compression working chamber 81 (cm) is formed between the arcuate sectioning element 6 and the first reciprocating sectioning element 7, and an exhaust working chamber 83 (exh) is formed between the first reciprocating sectional translational element 7 and second sectional reciprocating element 8 in the annular working chamber 5. When the arcuate element 6 is between the first sectional reciprocating element 7 and the outlet 12, the combustion chamber 82 (com) is formed between the first reciprocating element 7 of the partition and the arcuate element 6 of the partition, and the working chamber 83 release (exh) is formed between the arcuate element 6 of the partition and the second recipient sectional element 8 in the annular working chamber 5.

As shown in FIG. 2, the housing 4 is equipped with a fuel injector 14 as a fuel supply means for injecting fuel into the compressed intake air in the compression working chamber 81. However, instead of the fuel injector 14, a fuel injector may be provided for injecting fuel into the auxiliary combustion chamber 13. Moreover, a fuel injector 14A for additionally injecting fuel into the working combustion chamber 82 may be provided in addition to the fuel injector 14 or the fuel injector for injecting fuel into the auxiliary combustion chamber 13.

The auxiliary combustion chamber 13 and the surrounding structure are described below. As shown in FIGS. 2, 6 and 14-16, an auxiliary combustion chamber 13 is formed in the wall of the housing 4 on the sidewall of the output shaft 1, and not in the inner peripheral wall 25a in a circumferential position corresponding to the first reciprocating sectioning element 7. In this embodiment, the auxiliary chamber 13 is spherical. An inlet channel 91 connecting the working compression chamber 81 to the auxiliary combustion chamber 13 is formed in the housing 4 so as to introduce compressed air-fuel mixture in the working compression chamber 81 into the auxiliary combustion chamber 13. The exhaust channel 92 is formed in the housing 4 so as to divert the gas generated from combustion in the auxiliary combustion chamber 13 to the working combustion chamber 82. The volume of the auxiliary combustion chamber 13 is determined relative to the volume of the inlet working chamber 80 so that it is filled with a fuel-air mixture with a predetermined compression ratio (for example, 14-16 in the case of an engine with spark plugs, as in this embodiment). The volume of the inlet working chamber 80 is determined taking into account the volume of compressed air-fuel mixture remaining in the inlet channel 91. The auxiliary combustion chamber 13 may be formed on the outside rather than on the outer peripheral wall 25b.

The first on-off valve 15 is for opening / closing the inlet channel 91 at the lower end and the second on-off valve 16 is for opening / closing the exhaust channel 92 at the upper end. Inlet channel 91 is configured to have minimized throughput. The inlet channel 91 has a suction port 91a at its upper end, which is open to the annular working chamber 5 on the inner peripheral wall 25a near the rear end of the first reciprocating sectioning element 7. Behind the suction port 91a, the inlet channel 91 has a curved portion through a wall that is open to the auxiliary combustion chamber 13 at the lower end, where it is closed / opened by the first on-off valve 15. The first on-off valve 15 of this embodiment is a poppet valve that opens inward auxiliary combustion chamber 13.

The exhaust channel 92 is open to the auxiliary combustion chamber 13 at the upper end, where it is closed / opened by the second on-off valve 16. Behind the opening at the upper end, the exhaust channel 92 has a curved portion that ends with a drain opening 92a that is open to the annular working chamber 5 on the inner peripheral wall 25a near the front end of the first reciprocating sectioning element 7. The second on-off valve 16 of this embodiment is a poppet valve that opens outward from the auxiliary combustion chamber 13. However, the second on-off valve 16 may be a poppet valve openable inside the auxiliary combustion chamber 13, like the first on-off valve 15. The first and second on-off valves 15, 16 are given as an example, and various valve structures may be used.

The valve driving mechanisms 18, 19 for driving the first and second on / off valves 15, 16 are described below. As shown in FIG. 14, the first on-off valve 15 has a valve stem 15a extending obliquely upward through the wall of the housing 4, and the second on-off valve 16 has a valve stem 16a extending obliquely downward through the wall of the housing 4. To introduce the first and second on-off valves 15 and 16, a part of the auxiliary combustion chamber 13 and the surrounding wall of the housing 4 are composed of divided parts, and the divided parts are attached to the housing 4 by means of bolts and pins in an appropriate manner.

For example, a shaft driving motor 105 capable of operating at high speed is provided as a drive for driving the valve shaft 15a. The shaft driving motor 105 has an output member 105a connected to the valve shaft 15a. The first on / off valve 15 is opened / closed by the motor 105 for driving the shaft in synchronization with the rotation of the output shaft 1. Similarly, for example, the motor 106 for driving the shaft, allowing high-speed operation, is provided as a starter for driving the shaft 16a of the valve. The shaft driving motor 106 has an output member 106a connected to the valve shaft 16a. The second on-off valve 16 is opened / closed by the motor 106 for driving the shaft synchronously with the rotation of the output shaft 1. Two motors 105 and 106 for driving the shaft are controlled by a control module (not shown) for controlling the engine.

The above valve driving mechanisms 18, 19 are provided as examples, and various valve driving mechanisms may be used.

If the shape of the auxiliary chamber 13 allows, the valve stems 15a, 16a can be arranged parallel to the axis of the output shaft 1. In this case, the valve stems 15a, 16a can be directly driven by cam elements provided on the output shaft 1. Alternatively, the first and second on / off valves 15, 16 may be driven by first and second cam elements driven by cam shafts connected to output shaft 1. Additionally, alternatively, the first and second on / off valves us 15, 16 may be driven by the first and second cam members driven by two electric motors rotating in synchronism with the output shaft 1. Further alternatively, the first and second on-off valves 15, 16 can be driven individually directly by two solenoid actuators.

The castings of the above described rotary engine E are described below.

Fig.17-26 are illustrations showing the strokes of the intake, compression, combustion and exhaust of the rotary engine E1. They are spread out views of the full circle of the annular working chamber 5 when viewed radially from the outside. These drawings show four strokes of the right-hand rotary engine E1. Four cycles of the left-hand rotary engine E2 are delayed relative to four cycles of the right-hand engine E1 by an angle of rotation of 180 degrees of the output shaft 1.

The drawings show an arcuate sectioning element 6, first and second reciprocating sectioning elements 7, 8, a suction port 91a, a drain port 92a, an inlet 11 and an outlet 12. The end of the compression stroke shown in FIG. 23 corresponds to “top dead compression point. " In the drawings, "int" represents an intake stroke; "cmp" - compression stroke; "com" - combustion cycle; a "exh" is the beat of the release. The engine reduction continues from FIG. 17 to FIG. 26 in order and returns from FIG. 26 to FIG. 17 in order. Fuel is injected by the fuel injector 14 at the proper time during the period of FIG. 20 to FIG.

The first on-off valve 15 closes at the top dead center of the compression shown in Fig.23, and opens at the appropriate time near the time of Fig.20. The second on-off valve 16 opens at the appropriate time during the period between FIGS. 25, 26 and closes at about the same time that the first on-off valve 15 opens. The air-fuel mixture in the auxiliary combustion chamber 13 is ignited by a spark plug 17, for example, at about the same time as the top compression dead center.

As can be seen from the ghosts shown in Figs. compressed air within the compression chamber 81, the air-fuel mixture is introduced into the auxiliary combustion chamber 13 and ignited by the spark plug 17 after the first and second on-off valves 15, 16 are closed, ha generated from combustion is pushed through the drain hole 92a into the combustion chamber 82 while the second on-off valve 16 is open, and the pressure of the gas generated from the combustion is applied to the arcuate sectioning element 6 during the combustion stroke, thereby generating a torque to rotate (bring) the output shaft 1. Exhaust gas is discharged through the outlet 12. Here, the region S shown in FIG. 3 corresponds to the pressure receiving region, within which the arcuate sectioning element 6 receive are gas pressure generated by combustion.

The operation and advantages of the rotary engine E are described below.

The inner peripheral side sliding surface 6a of the arcuate sectioning element 6 makes tight area contact with the inner peripheral wall 25a of the annular working chamber 5, the outer peripheral side sliding surface 6b makes tight square contact with the outer peripheral wall 25b of the annular working chamber 5, and the front surface 42 sliding creates a tight contact over the area with the side annular wall 25c of the housing of the annular working chamber 5. Therefore, the arcuate element 6 ktsionirovaniya perpendicular and hermetically partitions the annular operation chamber 5.

The first and second reciprocating sectioning elements 7, 8 hermetically section the annular working chamber 5 when they are in the extended position. When the arcuate sectioning element 6 rotates with the rotor 2, the first and second reciprocating sectioning elements 7, 8 make airtight contact with the first inclined surface 41, the front sliding surface 42 and the second inclined surface 43 of the arcuate sectioning element 6 in order and are moved from the extended provisions in the allotted position. Then they return to the extended position after the arcuate sectioning element 6 passes them.

The front sliding surfaces 53 of the first and second reciprocating sectioning elements 7, 8 create a tight area contact with a part of the annular wall 26 of the rotor 2, which is located on a plane orthogonal to the axis. The inner peripheral side surfaces 50 of the sliding of the first and second reciprocating section elements 7, 8 make tight area contact with the inner peripheral wall 25a of the annular working chamber 5, and the outer peripheral side surfaces 51 of the slip make tight area contact with the outer peripheral wall 25b. Therefore, the first and second reciprocating sectioning elements 7, 8 are hermetically sealed and annularly operating the cross section 5. The first and second reciprocating sectioning elements 7, 8 do not create movement relative to the housing 4 in the direction of rotation, which is advantageous for sealing. A mechanism may be provided to prevent movement of the first and second reciprocating sectioning elements 7, 8 relative to the housing 4 in the direction of rotation (see the engaging guide mechanism 110, 110A, described later).

In rotary engines E1 and E2, the annular working chamber 5 is formed by a part of a larger diameter, at least one of the parts of the side walls of the rotor 2 having a radius of 0.5 R or more (R is the radius of the rotor 2), and the housing 4. Thus , the lateral space of the rotor 2 in the axial direction is effectively used to form an annular working chamber 5, excluding the element, strongly protruding outward from the outer border of the rotor 2, and reducing the overall height and width of the engine. The arcuate sectioning element 6 and the first and second reciprocating sectioning elements 7, 8 create airtight contact over the area with the walls of the annular working chamber 5, which is beneficial to ensure sealing and lubrication properties, as well as strength.

The annular working chamber 5 resists a part of the larger diameter of the rotor 2. Therefore, the radius of rotation from the axis of the output shaft 1 to the pressure generating element 6 (under pressure), which receives the pressure of the gas generated from combustion (which corresponds to the radius of the crank), can be significantly larger, than the radius of the crank engine with reciprocating movement for the same working volume of the cylinder. Moreover, the pressure of the gas generated from the combustion is converted to the output torque by means of the aforementioned larger radius of rotation, thereby significantly increasing the conversion efficiency from the pressure of the gas generated from the combustion to the output characteristics (torque, horsepower) and obtaining an internal combustion engine having high economic efficiency in fuel consumption.

The rotary engine E1 has one arcuate sectioning element 6 on one side of the rotor 2 and the first and second reciprocating sectioning elements 7, 8 on the housing 4. One combustion cycle is realized by one rotation of the output shaft 1 and, therefore, the working volume of the cylinder can be reduced up to half the cylinder displacement of a four-stroke engine with the same output power, thereby reducing the size of the engine. For example, when the annular working chamber 5 has an inner radius of 17 cm, an outer radius of 23 cm and a thickness of 4 cm in the axial direction, and the working chamber 80 of the inlet has an arc length of 105 degrees in the circumferential direction, the working chamber 80 of the inlet has a volume of about 750 cubic centimeters, which corresponds to a four-stroke engine having a cylinder displacement of 1,500 cubic centimeters. Moreover, this corresponds to a four-stroke engine having a cylinder displacement of 3000 cubic centimeters, since two sets of annular working chamber 5 are provided on each side of the rotor 2. However, due to the compressed air-fuel mixture remaining in the inlet 91, the inner and the outer radius can be 18 cm and 24 cm, respectively, in practice.

In addition, the combustion cycle can cover 180-200 degrees or even more than the output shaft. The combustion cycle can be done more than the combustion cycle of a four-stroke engine, for increased combustion efficiency. An annular working chamber 5 is formed on each side of the rotor 2, and the rotor 2 is shared by two sets of engine E1 and E2. This is beneficial for creating a smaller engine, but with better output characteristics, and for lower engine speeds.

A partially modified embodiment of the above rotary engine E is described below.

Second Embodiment

As shown in FIGS. 27 and 28, the gas pressure of the compressed air-fuel mixture is applied to the first reciprocating sectioning element 7A in the circumferential direction within the compression chamber, and the pressure of the gas generated from combustion is applied to the first reciprocating element 7A of sectioning in a circumferential direction within the working combustion chamber. Further, an engaging guide mechanism 110 is provided to prevent the reciprocating sectioning member 7A from moving in a circumferential direction and to allow it to move parallel to the axis of the output shaft 1. The engaging guide mechanism 110 includes engaging protrusions 111, 112 and engaging grooves 111a, 112a with which the engaging the protrusions 111, 112 engage without jerks in the direction along the circumference, but with the possibility of sliding in the axial direction.

The engaging protrusions 111, 112 protrude from the inner and outer peripheral side surfaces 50, 51 of the slide of the first reciprocating sectioning element 7 in the center in the width direction, respectively, and are parallel to the axis of the output shaft 1. The engaging grooves 111a, 112a are machined in the inner and outer peripheral walls 25a, 25b of the annular working chamber 5, respectively. The gas pressure applied to the first reciprocating sectioning element 7A in the circumferential direction is maintained by the engaging guide mechanism 110, whereby the load on the first reciprocating sectioning element 7A is reduced, and the elastic deformation of the first reciprocating sectioning element 7A in the direction along circumference can be excluded. Therefore, the first reciprocating sectioning element 7A can perform a smooth reciprocating movement and be reduced in size. In this case, the engaging protrusion and the engaging groove on one side (on the inner or outer side) can be eliminated. The elements of the cotter pins can be used instead of the engaging protrusions 111, 112.

The engagement guide mechanism 110A shown in FIG. 29 is used for the same purpose as the engagement guide mechanism 110. The engagement guide mechanism 110A includes engagement protrusions 113, 114 extending across the entire width of the inner and outer peripheral side surfaces of the first reciprocating element 7B of the sectioning in the circumferential direction, and the engaging grooves 113a, 114a formed on the inner and outer peripheral walls 25a and 25b of the annular working chamber 5, with which the engaging protrusions 113, 114 cling without jerks in the direction along the circle, but with the possibility of sliding in the axial direction. In this case, the engaging protrusion and the engaging groove on one side (on the inner or outer side) can be eliminated. In this structure, the inner and outer peripheral walls 25a, 25b of the annular working chamber 5 are mostly cylindrical. The same engaging guide mechanism as the engaging guide mechanism 110 or 110A may be provided in the second reciprocating sectioning element 8.

Third Embodiment

As in the above embodiment, when the annular working chamber 5A has a rectangular cross section, the flammability of the air-fuel mixture may be less at the corners of the annular working chamber 5A. Further, as shown in FIGS. 30-32, the annular working chamber 5A has a rectangular half-profile with rounded corners in a plane containing the axis of the output shaft 1. This annular working chamber 5A consists of a shallow groove 115 formed in the rotor 2A and a deep groove 120 formed in the housing 4A.

The shallow groove 115 has a first annular wall 116 on a plane orthogonal to the axis of the output shaft 1, and an inner and outer corner wall 117, 118 that are on the inner peripheral side and on the outer peripheral side of the first annular wall 116. The deep groove 120 has an inner cylindrical wall 121, the outer cylindrical wall 122, the second annular wall 123 on a plane orthogonal to the axis of the output shaft 1, and the inner and outer corner walls 124, 125, which are on the inner peripheral side and on the outer the peripheral side of the second annular wall 123. As shown in Figure 31 and 32, a first reciprocating partitioning member 7C has a larger width in the circumferential direction. The same engaging guide mechanism as the engaging guide mechanism 110A is provided for the first reciprocating sectioning member 7C. The first reciprocating sectioning element 7C has a cross section at the front end sectioning the shallow groove 115. The first and second contact surfaces 58A, 59A have an increased width. The first and second contact surfaces 58A, 59A are equipped with grooves for installing a seal and sealing elements 63A, 64A extending from the inner cylindrical wall 121 to the outer cylindrical wall 122 of the deep groove 120.

The solid line 126 represents the boundary between the rotor 2A and the housing 4A, and the broken line 127 represents the ends of the rounded corner walls 124, 125. The inner peripheral wall of the annular working chamber 5A is mostly cylindrical, and the outer peripheral wall is mostly cylindrical. Instead of using the first and second contact surfaces 58A, 59A having an increased width, shallow grooves making airtight contact with the front of the first reciprocating sectioning element 7C can be formed in the first and second inclined surfaces 41, 43.

Fourth Embodiment

As shown in FIG. 33, the first reciprocating sectioning element 7D is mounted for reciprocating movement in the housing 4. An auxiliary combustion chamber 13A is formed in the first reciprocating sectioning element 7D. A flattened inlet 130 connecting the compression working chamber 81 to the auxiliary combustion chamber 13A is formed in the rear end wall of the first reciprocating sectioning member 7D. A flattened exhaust channel 131 connecting the compression working chamber 81 to the auxiliary combustion working chamber 13A is formed in the front end wall of the first reciprocating sectioning member 7D. A rotary valve 132 for opening / closing the flattened inlet 130 and a rotary valve 133 for opening / closing the flattened inlet 131 are rotatably mounted in the first reciprocating sectioning member 7D. The rotary valves 132, 133 all rotate 90 degrees through a drive (not shown) to open / close the inlet and outlet channels 130, 131, respectively, synchronously with the rotation of the output shaft 1. In this case, the spark plug 17 for igniting the compressed air-fuel mixture an auxiliary combustion chamber 13A is also provided. The inlet 130 is flattened and small in length, thereby having a smaller volume, which is suitable for compact rotary engines.

The inlet and outlet channels 130, 131 can be opened / closed by displacing the rotary valves 132, 133 in the axial direction.

Fifth Embodiment

The rotor 2B has an annular groove 140, which is a groove similar to the groove 25 constituting the annular working chamber 5, and open on the sidewall to the housing 4B. The rotor 2B is equipped with a reciprocating sectioning element 7R as a pressure generating element (under pressure). As shown in FIG. 34, the housing 4B is integrally provided with one or more arcuate sectioning elements 6A as a sectioning element of the working chamber. The auxiliary combustion chamber 13B is formed in at least one of the arcuate sectioning elements 6A. A flattened inlet channel 141 connecting the compression working chamber to the auxiliary combustion chamber 13B is formed in the rear end wall of the arcuate sectioning member 6A, and a flattened inlet channel 142 connecting the auxiliary combustion chamber 13B to the compression working chamber is formed in the front end wall of the sectioned arcuate 6A .

A rotary valve 143 for opening / closing the inlet channel 141 and a rotary valve 144 for opening / closing the exhaust channel 142 are rotatably mounted in the arcuate sectioning member 6A. The rotary valves 143, 144 all rotate 90 degrees through a starter (not shown) to open / close the inlet and outlet channels 141, 142, respectively, synchronously with the rotation of the output shaft 1. At the same time, the spark plug 17 for igniting the compressed air-fuel mixture an auxiliary combustion chamber 13B is also provided. The inlet channel 141 is flattened and small in length, thereby having a smaller volume, which is suitable for compact rotary engines. The inlet and outlet channels 141, 142 may open / close by displacing the rotary valves 143, 144 in the axial direction. A casing or housing element for closing the inside of the rotor 2B may be provided if necessary.

Sixth Embodiment

As shown in FIGS. 35 and 36, this rotary engine has a first reciprocating sectioning member 150 having first and second sectioning members 151, 152. Engaging guide mechanisms 156, 157 are provided for the first and second sectioning members 151, 152. A secondary combustion chamber 13C in the form of a partially truncated sphere is formed in the first sectioning member 151. The auxiliary combustion chamber 13C is open at the front end of the first sectioning member 151. The second sectioning element 152 is pressed against the front end of the first sectioning element 151 so as to close / open the auxiliary combustion chamber 13C.

A flattened inlet channel 153 is provided for introducing the compressed air-fuel mixture from the compression working chamber 81 into the auxiliary combustion chamber 13C. A rotary valve 154 for opening / closing the inlet channel 153 is installed in the first sectioning member 151. The rotary valve 154 rotates 90 degrees through an actuator (not shown) provided in the first sectioning element 151 to open / close the inlet channel 153. The first sectioning element 151 is also equipped with a spark plug 17 for igniting the air-fuel mixture in the auxiliary combustion chamber 13C and an annular sealing element 155 for sealing the outer boundary of the opening of the auxiliary combustion chamber 13C.

The first sectioning member 151 is biased toward the extended position by a pneumatic spring or a metal spring (not shown). The second sectioning member 152 reciprocates in synchronization with the rotation of the output shaft 1 by means of a cam mechanism (not shown) associated with the output shaft 1. FIGS. 37-41 illustrate the operations of the first and second sectioning members 151, 152. The air-fuel mixture is introduced into the auxiliary combustion chamber 13C from the working compression chamber in FIG. 37, reaches the compression dead center in FIG. 38, and is ignited by the spark plug 17 in FIG. 39. Next, the gas generated from combustion is pushed into the working combustion chamber from the auxiliary combustion chamber 13C in FIGS. 40 and 41.

For the first reciprocating sectioning member 150, the inlet channel 153 may have a very small volume, and the gas generated from the combustion is pushed into the combustion chamber from the auxiliary combustion chamber 13C, which is suitable for compact engines.

Rotary valves can be excluded. In this case, the inlet channel 153 can be opened / closed by means of a third sectioning element similar to the second sectioning element 152, the third sectioning element being made on the rear end side of the first sectioning element 151 and reciprocating by a cam mechanism.

Seventh Embodiment

In the rotary engine EA shown in FIG. 42, the rotor 2 comprises, as a pressure generating element (under pressure), an arcuate sectioning element 6, sectioning the annular working chamber 5, and the housing 4C is equipped with a reciprocating sectioning element 7E, as the sectioning element of the working chamber, and an auxiliary combustion chamber (not shown) corresponding to it. The second reciprocating sectioning element 8 is excluded. The housing 4C has an inlet 11 formed next to the reciprocating sectioning element 7E on the front side and not on the reciprocating sectioning element 7E, and an outlet 12 formed next to the reciprocating sectioning element 7E on the back side, and not on the reciprocating sectioning element 7E. An inlet valve (not shown) for opening / closing the inlet 11 and an outlet valve (not shown) for opening / closing the outlet 12 are also provided.

In the rotary engine EA, the intake and exhaust valves properly open / close synchronously with the rotation of the output shaft 1, whereby every four rotations of the output shaft 1 lead to two operating cycles. When two sets of motors are provided on each side of the rotor, every four rotations of the output shaft 1 leads to four operating cycles. The combustion period covers a rotation angle of 360 degrees of the output shaft 1. This sufficient combustion period significantly increases the combustion efficiency.

Eighth Embodiment

The rotary engine EB shown in FIG. 43 consists of the engine in FIG. 42 with the addition of a partition 7F with a reciprocating movement, partitioning the annular working chamber 5, an auxiliary combustion chamber (not shown) corresponding thereto, inlet 11A, outlet 12A in the housing 4D in rotationally symmetrical positions relative to the reciprocating sectioning element 7E, the inlet 11 and the outlet 12 around an axis. An inlet valve for opening / closing the inlet 11A and an exhaust valve for opening / closing the outlet 12A are also provided.

In the engine EB, two sets of intake and exhaust valves are properly opened / closed synchronously with the rotation of the output shaft 1, whereby every two rotations of the output shaft 1 lead to four operating cycles. When two sets of motors are provided on each side of the rotor, every two rotations of the output shaft 1 result in eight working cycles.

Ninth Embodiment

In the EC rotary engine shown in FIG. 44, the casing 4E is equipped with first and second sectioning elements 7, 8, partitioning the annular working chamber 5, as in rotary engine E, and the rotor contains, as a pressure generating element (under pressure), two arcuate sectioning elements 6, 6, spaced approximately 180 degrees in the direction of rotation of the rotor. In the EC engine, two fires occur every one rotation of the output shaft 1; the working cycle is carried out for each rotation of 180 degrees of the output shaft 1. Therefore, the engine can be reduced in size, have a reserve on the working volume of the cylinder and be driven at lower speeds, thereby leading to increased combustion efficiency.

Tenth Embodiment

The rotary engine ED shown in FIG. 45 is suitable for medium or large engines operating at lower speeds, such as medium or large marine engines. Similarly to engine E, engine ED has first and second reciprocating sectioning elements 7, 8 mounted in housing 4F for sectioning the annular working chamber 5. Housing 4F also has an additional outlet 160 at a position of about 120 degrees from the front end of the first reciprocating element 7 sectioning. An auxiliary combustion chamber (not shown) is also provided adjacent to the first reciprocating sectioning element 7.

The rotor contains, as a pressure generating element (and to which pressure is applied), three arched sectioning elements 6, 6, 6 in three equally spaced positions on the circle. In the ED engine, three fires occur every one rotation of the rotor. A working cycle is carried out for each rotation of 120 degrees of the output shaft 1. Two sets of motors are provided on each side of the rotor. The working cycle is carried out for each rotation by 60 degrees of the output shaft 1. Therefore, the engine can be reduced in size, have a reserve on the working volume of the cylinder and be driven at lower speeds, thereby leading to increased combustion efficiency.

Eleventh Embodiment

The rotary engine EE shown in FIG. 46 is suitable for medium or large engines operating at lower speeds, such as marine engines. The housing 4G is equipped, as a sectioning element, sectioning the annular working chamber 5, four reciprocating sectioning elements 7, 8 in four equidistant positions on the circle. The rotor contains, as a pressure generating element (and to which pressure is applied), four arcuate sectioning elements 6 in four equidistant positions on the circle. The inlet openings 11 are formed adjacent to the reciprocating sectioning element 8 on the front sides in the direction of rotation, and not on the two reciprocating sectioning elements 8 spaced 180 degrees in the circumferential direction, and the outlet openings 12 are formed adjacent to the reciprocating element 8 sections on the rear sides in the direction of rotation. Auxiliary combustion chambers (not shown) are formed next to the two reciprocating sectioning elements 7.

In the engine EE, two auxiliary combustion chambers are ignited for two working cycles in each rotation of 90 degrees of the output shaft 1. Therefore, each one rotation of the output shaft 1 leads to eight working cycles. As a result, the engine can be reduced in size.

As indicated by broken lines, the annular working chamber 5A can be formed inside the annular working chamber 5. The annular working chamber 5A can be equipped with several reciprocating sectioning elements, several auxiliary combustion chambers and two sets of inlet and outlet openings, as in the case of an external annular working chamber 5. Thus, another set of motors is additionally designed for efficient use of space in the rotor and housing. Two sets of inlet and outlet openings for the annular working chamber 5A may be formed in the right wall of the housing 4G. Thus, with two sets of motors provided on one side of the rotor, the motor can be further reduced in size. Moreover, four sets of motors can be provided on each side of the rotor. Therefore, the EE engine is suitable for large marine engines.

Twelfth Embodiment

The above described rotary engines are exemplified as an ignition engine in which a fuel-air mixture is ignited by a spark plug. The rotary engine of the present invention is applicable to diesel engines in which fuel is injected into compressed air in an auxiliary combustion chamber and ignited by compression ignition. However, in the case of diesel engines, the compression ratio should be increased to about 22.

Industrial applicability

The rotary engine of the present invention can be used in engines using various types of fuel, such as heavy diesel fuel, diesel fuel, gasoline, ethanol, LPG, natural gas and nitrogen gas; engines in various applications, such as vehicles, construction equipment, agricultural equipment, various industrial equipment and marine engines with different cylinder displacement; and in engines with small to large cylinder displacement.

Claims (19)

1. A rotary piston internal combustion engine containing
output shaft
a rotor connected to the output shaft without relative rotation,
a housing rotatably supporting the output shaft,
an annular working chamber formed by means of a rotor and a housing for forming an inlet working chamber, a compression working chamber, a combustion working chamber and an exhaust working chamber,
at least one pressure generating element / under pressure provided on the rotor for sectioning the annular working chamber and for compressing the incoming air in the compression working chamber and for receiving gas pressure from the gas generated from combustion in the working combustion chamber,
at least one sectioning element of the working chamber provided in the housing for sectioning the annular working chamber,
an inlet for intake of intake air into the annular working chamber,
an outlet for discharging gas from the annular working chamber and
means for supplying fuel,
while the compressed fuel-air mixture is ignited using a spark plug or due to compression ignition,
characterized in that
an annular working chamber is formed in the axial direction of the output shaft by means of the housing and parts of the side wall of the rotor and has a fully or substantially cylindrical inner wall and a fully or substantially cylindrical outer wall;
said working chamber sectioning element comprises a reciprocating sectioning element that reciprocates parallel to the axis of the output shaft between the extended position where it sections the annular working chamber and the retracted position where it is brought out of the annular working chamber;
a shifting means for shifting the reciprocating sectioning element in the direction of the extended position;
wherein said pressure generating member / being pressurized comprises an arcuate sectioning member having a first inclined surface for moving the reciprocating sectioning member from an extended position to a retracted position, a front sliding surface extending from the first inclined surface, and a second inclined surface extending from the front sliding surface and allowing the reciprocating sectioning element to return from the allotted extended position
while part of the side wall of the rotor has a wall surface parallel to a plane perpendicular to the axis of the output shaft, and
the reciprocating sectioning element has at its front end a first sliding surface for making tight contact with the first inclined surface of the arcuate sectioning element, a front sliding surface for making tight contact with the wall surface that is parallel to the specified plane perpendicular to the axis of the output shaft, and the second surface sliding, designed to create a tight contact with the second inclined surface of the arcuate eleme that partition. 2. The rotary piston internal combustion engine according to claim 1, in which the annular working chamber contains an annular groove machined in the housing and has a rectangular half profile in the plane containing the axis of the output shaft, while part of the annular side wall of the rotor closes the annular groove. 3. The rotary piston internal combustion engine according to claim 1, in which
the annular working chamber has a rectangular half-profile with arched rounded corners in a plane containing the axis of the output shaft, and contains a shallow annular groove formed in the part of the side wall of the rotor and a deep annular groove formed in the housing;
wherein the shallow annular groove has a first annular wall on a plane perpendicular to the axis of the output shaft, and inner and outer corner walls that are at the inner end and at the outer end of the first annular wall; and
the deep annular groove has a cylindrical inner wall, a cylindrical outer wall, a second annular wall on a plane perpendicular to the axis of the output shaft, and inner and outer corner walls that are on the inner side and on the outer side of the second annular wall. 4. The rotary piston internal combustion engine according to any one of claims 1 to 3, wherein an engaging guide mechanism is provided that prevents the reciprocating sectioning element from moving in the circumferential direction and allowing the reciprocating sectioning element to move parallel to the axis of the output shaft. 5. The rotary piston internal combustion engine according to any one of claims 1 to 3, in which the biasing means comprises a pneumatic spring biasing the reciprocating sectioning element in the direction of the extended position. 6. The rotary piston internal combustion engine according to any one of claims 1 to 3, in which an annular working chamber is provided on each side of said rotor in the axial direction of the output shaft and each annular working chamber is provided with a pressure generating element / under pressure and a working sectioning element cameras respectively. 7. The rotary piston internal combustion engine according to any one of claims 1 to 3, in which the arcuate sectioning element has an inner side sliding surface that makes contact with the cylindrical inner wall, and an outer side sliding surface that makes contact with the cylindrical outer wall, each of the inner and outer side sliding surfaces, as well as the front sliding surface of the arcuate sectioning element, is provided with one or more grooves for installing a seal in which e fed lubricating oil, and one or more sealing members movably mounted in the grooves for the installation of the seal. 8. The rotary piston internal combustion engine according to claim 1, wherein the reciprocating sectioning element has an inner lateral sliding surface and an outer lateral sliding surface, the inner and outer lateral sliding surfaces, as well as the first, front and second sliding surfaces of the reciprocating the translational sectioning element is provided with one or more grooves for installing a seal into which lubricating oil is supplied, and one or more sealing elements are installed with the possibility the ability to move in the grooves to install the seal. 9. The rotary piston internal combustion engine according to claim 1, in which the leading edge in the direction of rotation of the rotor of the first inclined surface of the arcuate sectioning element is on a line orthogonal to the axis of the output shaft, the first inclined surface has an inclination in the circumferential direction, linearly decreasing in the radially outer direction, the rear edge in the direction of rotation of the rotor of the second inclined surface of the arcuate sectioning element is on a line orthogonal to the axis of said output shaft, and the second inclined surface has an inclination in the circumferential direction, linearly decreasing in the radially outward direction. 10. The rotary piston internal combustion engine according to any one of claims 1 to 3, in which the housing is provided with a first reciprocating sectioning element and a second reciprocating sectioning element spaced from said first reciprocating sectioning element, at least 180 ° in the direction of rotation of the rotor. 11. The rotary piston internal combustion engine of claim 10, in which an auxiliary combustion chamber is provided in the housing wall portion, an inlet is formed in the housing portion next to the second reciprocating sectioning element at the front side in the direction of rotation of the rotor, and the exhaust hole is formed in the part of the housing next to the second reciprocating sectioning element at the rear side in the direction of rotation of the rotor. 12. The rotary piston internal combustion engine according to claim 11, in which:
when the pressure generating element / under pressure is between the inlet and the first reciprocating sectioning element, the inlet working chamber is formed between the second reciprocating sectioning element and the pressure creating element / under pressure, and the compression working chamber is formed between the pressure creating element / under pressure and the first reciprocating sectioning element in the annular working chamber; and
when said pressure generating member / under pressure is between the first reciprocating sectioning member and the outlet, a combustion chamber is formed between the first reciprocating sectioning member and the pressure generating member / under pressure, and the exhaust working chamber is formed between the pressure generating member / under pressure and a second reciprocating sectioning element in the annular working chamber. 13. The rotary piston internal combustion engine according to claim 12, wherein the fuel supply means has a fuel injector for injecting fuel into the working combustion chamber and a spark plug is provided for igniting the fuel-air mixture in the auxiliary combustion chamber. 14. The rotary piston internal combustion engine of claim 12, wherein said fuel supply means has a fuel injector for injecting fuel into said auxiliary combustion chamber. 15. The rotary piston internal combustion engine according to item 13, in which the fuel supply means has a fuel injector, providing additional fuel injection into the working combustion chamber. 16. The rotary piston internal combustion engine according to claim 12, wherein an inlet channel is provided for connecting the working compression chamber to the auxiliary combustion chamber, a two-position valve of the inlet channel for opening / closing the inlet channel, an exhaust channel for discharging gas generated by combustion in the auxiliary the combustion chamber, into the working combustion chamber and a two-position valve of the exhaust channel for opening / closing the exhaust channel. 17. The rotary piston internal combustion engine according to clause 16, which provides means for bringing several valves to bring the on-off valve of the inlet channel and the on-off valve of the exhaust channel synchronously with the rotation of the output shaft. 18. The rotary piston internal combustion engine according to claim 1, in which the sectioning element of the working chamber contains an auxiliary combustion chamber formed in the reciprocating sectioning element. 19. The rotary piston internal combustion engine according to claim 12, wherein the fuel supply means has a fuel injector for injecting fuel into the auxiliary combustion chamber, wherein the air-fuel mixture in the auxiliary combustion chamber is ignited by compression ignition.

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