WO1999035382A1

WO1999035382A1 - A rotary gear engine

Info

Publication number: WO1999035382A1
Application number: PCT/CN1998/000131
Authority: WO
Inventors: Jungkuang Chou
Original assignee: Jungkuang Chou
Priority date: 1998-01-07
Filing date: 1998-07-22
Publication date: 1999-07-15
Also published as: AU8429998A

Abstract

A rotary gear engine includes a cylinder, two gears with same pitch, meshed with each other, and arranged within the cylinder, a vacuum hood fitted within the cylinder and disposed at one side of the two gears, the vacuum hood having two curved portions at two opposite sides and a gas inlet extending out of the cylinder, and an exhaust hood fitted within the cylinder and disposed at another side of the two gears, whereby the rotary gear engine is of high efficiency and compact in size. Furthermore, the four sequences of the intake, compression, combustion and exhaust cycles occur simultaneously thereby enabling the engine to produce power in a continuous stream and therefore providing an excellent acceleration which is larger than that of a conventional engine.

Description

A ROTARY GEAR ENGINE

BACKGROUND OF THE INVENTION

1. Field Of The Invention

This invention is related to a rotary gear engine and in particular to one which is of high efficiency, compact in size, stable and quiet in operation and excellent in acceleration and can work without cooling or ignition control system.

2. Description Of The Prior Art

As we know, the use of connecting rod and crankshaft, with camshaft control to deliver power from reciprocating pistons has been eminently successful as attested by widespread use. Nevertheless, this arrangement still suffers from the following drawbacks: low efficiency, bulky in volume, low output power (comparatively), complicated and precise structure, difficult to repair and maintain, noisy and knocking in operation, poor accelerating ability, and narrow temperature-operating range.

In 1957, a German engineer called Wankel invented a rotary triangular piston engine in which a triangular piston revolved in an elliptical cylinder and exploded once per revolution. This engine is compact in size and stable in operation and has been installed in automobiles manufactured by Mazda (a Japanese automobile manufacturer). It is expected that the conventional reciprocal engine would be replaced with the so-called Wankel engine. The present invention provides the basis for the design changes required to optimize the operation characteristics and manufacturing conditions of engines using presently available technology and materials and permits additional, improvements as more advanced materials and technology become available. SUMMARY OF THE INVENTION

This invention is related to a rotary gear engine.

It is the primary object of the present invention to provide a rotary gear engine which is of high efficiency. It is another object of the present invention to provide a rotary gear engine which is compact in size and much smaller than a traditional reciprocating engine.

It is still another object of the present invention to provide a rotary gear engine which is of excellent accelerating ability.

It is still another object of the present invention to provide a rotary gear engine which is simple in construction.

It is a further object of the present invention to provide a rotary gear engine which is fit for practical use.

The foregoing objects and summary provides only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the Art, The Following Detailed Description Of The Invention And The Claims Should Be Read in conjunction which the accompanying drawings. Throughout the specification and drawings identical reference numberals refer to identical or similar parts.

Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of the present invention; FIG. 2 is an exploded view of the present invention;

FIG. 3 illustrates the relationship between the exhaust hood, the vacuum hood and the gears; and FIG. 4 is a perspective view of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings. Specific language will be used to describe same. It will, nevertheless, be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated device, and such further applications of the principles of the invention as illustrated herein being contemplated as would normally occur to one skilled in the art to which the invention relates.

With reference to the drawings and in particular to FIG. 1 and 2 thereof, the rotary gear engine according to the present invention generally comprises an upper cover 1, an exhaust hood 2, a gear assembly 3, a vacuum hood 4, and a lower cover 5.

The upper and lower covers 1 and 5 are symmetric in structure and secured together by screws to form a cylinder having a radial outlet 501 and two combustion chambers 57 which are communicated with each other. The upper cover 1 has two axial circular recesses 111 and 112 in which are fitted two bearings (not shown). The lower cover 5 has two axial circular recesses 531 and 532 which are aligned with the axial circular recesses 111 and 112 and in which are fitted two bearing (not shown). The gear assembly 3 includes two gears 30 and 31 which are arranged within the two combustion chambers 57 and engaged with each other. The gears 30 and 31 are of the same pitch and provided with two axles 301 and 311. The two axles 301 and 311 are rotatablely between the two bearings fitted in the two circular recesses 111 and 112 of the upper cover 1 and the two bearings fitted in the circular recesses 531 and 532 of the lower cover 5. The circular recess 111 extends through the upper cover 1 for the passage of the axles 301. The vacuum hood 4 is mounted at one side of the gear assembly 3. The vacuum hood 4 includes an adjust plate 43 having two curved portions 431 at two opposite sides,it having a clearance 45 at the top, a top plate 42 having an end inserted into the clearance 45, and a bottom plate 42' fixedly mounted on the lower edge of the adjust plate 43. The curved portion 431 of the vacuum hood 4 has a length larger than the pitch of the gears 30 and 31. When high temperature causes expansion of the top plate 42, its an end will be tightly fitted in the clearances 45. The bottom plate 42' of the vacuum hood 4 has a tubular gas inlet 41 extending downwardly out of the cylinder. A screw 51 extends through the top of the cylinder to engage with a spring 46 to bear against the top plate 42 thereby keeping the vacuum hood 4 in place. A sliding seat 59 is arranged behind the adjust plate 43 and urged by a spring 47 against the adjust plate 43 of the vacuum hood 4 thereby pushing the curved portions 431 of the adjust plate 43 against the top lands of the teeth of the gears 30 and 31, The sliding seat 59 is used for keeping the position of the vacuum hood 4 when the vacuum hood 4 is subjected to a high pressure in combustion phase. The rear side of each of the curved portions 431 of the adjust plate 43 has an arm 44. The arm 44 of one of the curved portions 431 is connected with a linking rod 62 having an upper contact B and a lower contact A. A screw 63 extends through the cylinder to bear against the sliding seat 59 and provided with a worm gear 60 which is engaged with a worm rod 64 fixedly mounted an output axle of a synchronous motor 61. The upper end of the screw 63 has a contact member C located between contacts A and B of the adjust plate 43. The exhaust hood 2 is mounted at another side of the gear assembly 3 within the cylinder and arranged opposite to the vacuum hood 4. The exhaust hood 2 includes a vertical plate 25 having two curved portions 251 at two opposite sides and having a clearance 22 at the top, an upper plate 24 having an end inserted into a clearance 22, and a lower plate 24' fixedly mounted on the lower edge of the vertical plate 25, and an exhaust orifice 21 at the central portion of the vertical plate 25. A screw 51 extends through the top of the cylinder to engage with a spring 23 so as to urge against the upper plate 24 thus keeping the exhaust hood 2 in place. The exhaust orifice 21 of the exhaust hood 2 is fitted in the exhaust pipe 54 with a seal (not shown) around its outer surface. At each side of the radial outlet 501 there is a screw 51 extending through the cylinder to force the exhaust hood 2 against the top lands 33 of the teeth of the gears 30 and 31. The front end of the screw 51 is enclosed in a spring 20. Two spark plugs 52 are threadedly engaged with two opposite sides of the cylinder and extend into the cylinder. The vacuum hood 4 has two arms 44 slidably fitted into two grooves 503 of the cylinder at two sides of the vacuum hood 4. The exhaust hood 2 has two arms 26 slidably fitted into two grooves 502 at two sides of the radial outlet 501 of the cylinder. An exhaust pipe 54 is connected with the exhaust orifice 21 of the exhaust hood 2.

The working principle of the rotary engine according to the present invention will now be described in details as follows:

Dry clean air is first supplied into the cylinder through the gas inlet 41 of the vacuum hood 4. In the meantime, an explosive mixture is sucked from a carburetor 12 where gasoline and air are mixed to make an explosive mixture into the combustion chambers 57. It should be noted, however, that the carburetor 12 may be replaced with an injector to increase the performance of the engine. Then the explosive mixture is transmitted to the combustion chambers 57 by the two gears 3. As the engine is powered, the synchronous motor 61 is turned on to rotate the worm rod 64 thereby rotating the worm gear 60 and the screw 63. Consequently, the sliding seat 59 is pushed by the screw 63 to force the curved portions 431 of the adjust plate 43 of the vacuum hood 4 against the top lands 33 of the teeth of the gears 30 and 31. Meanwhile, the electrical contact C gets in touch with the electrical contact A thereby causing the synchronous motor 61 to rotate in a reverse direction until the electrical contact C gets away from the electrical contact A. Hence, the spring 47 forces the sliding seat 59 to move slightly away from the adjust plate 43 thereby forming a clearance between the sliding seat 59 and the adjust plate 43. When high temperature causes expansion of the gears 30 and 31, the vacuum hood 4 will be pushed upwardly so that the linking rod 62 will be moved upwardly to make the electrical contact A get in touch with the electrical contact C again thereby causing the synchronous motor 61 to rotate in an opposite direction again until the electrical contact C gets away from the electrical contact A. The electrical contact A, B and C and the synchronous motor 61 are controlled by electronic means (not shown) which may be of any conventional design well known to those skilled in the art and is not considered a part of the invention. As the gears 30 and 31 slightly turn in the directions as shown in FIG. 1, the explosive mixture in the vacuum hood 4 will immediately rush into the flanks 56 of the teeth of the gears 30 and 31 to prepare for next step combustion. Then, the explosive mixture is ignited by the two spark plugs 52 so that it will produce a lot of gas which provides a high pressure forcing the teeth of the gears 30 and 31 to tend to the low pressure area in due course. The gas pressure normally used in the

2 combustion chambers 57 is 5-50 kg/cm and so the power P per revolution can be easily calculated according to the following formula:

P= Unit Pressure X Length of gear's pitch circle X (Addendum + Dedenum) X Gear thickness X 2 (channel)

In conclusion, the rotary gear engine according to the present invention will be of high efficiency and compact in size. Moreover, the four sequences of the intake, compression, combustion and exhaust cycles for each revolution of the engine occur simultaneously thereby enabling the engine to produce power in a continuous stream and therefore providing an excellent acceleration which is much larger than that of a conventional engine.

It will be understood that each of the elements described above, or two or more together may also find a useful application in other types of methods differing from the type described above.

While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the spirit of the present invention.

Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge, readily adapt it for various applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention.

Claims

What is Claims is:

1. A rotary gear engine comprising: a cylinder; two gears with same pitch, meshed with each other, and arranged within said cylinder; a vacuum hood fitted within said cylinder and disposed at one side of said two gears, said vacuum hood having two curved portions at two opposite sides and a gas inlet extending out of said cylinder; wherein each of said curved portion having a length larger than said pitch of said gears; a spring-loaded sliding seat , urging said vacuum hood against said two gears ; and an exhaust hood fitted within said cylinder and disposed at another side of said two gears.