Note: Descriptions are shown in the official language in which they were submitted.
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SPECIFICATION
1. TITLE OF THE INVENTION
Rotary Engine
2. BACKGROUND OF THE INVENTION
a. Field of the Invention
The present invention relates to a rotary engine wherein the
forms ofa housing and a rotor rotating in the housing are simple,
a capacity ratio of a suction chamber and a combustion chamber
can be freely set, blades in blade channels which are in radial ---
directions and which go through the center of the rotor are closely ~
. ~. .................................... . .
in contact with the inside surface of the housing, and the gap
between a blade separating a compression chamber from an explosion
chamber and the inside surface of the housing is not enlarged by
explosion pressure in the explosion chamber and the explosion
pressure does not leak in the compression chamber, so that explosion
at an inappropriate time is prevented, stable rotation is obtained,
and the fuel consumption can be substantially saved and improved.
b. Disclosure of Prior Art
Conventionally, there are various rotary engines of this
kind~ A typical example of a rotary engine of this kind which has
been put to practical use is a Wankel-type rotary engine. In a
Wankel-type rotary engine, a triangular rotor the surface of which
is made up of peritrochoid internal envelope is rotated along the
inside wall of a cocoon-shaped housing made up of peritrochoidal
curve, and when an internal gear disposed in the middle of the
rotor is engaged with and rotates around a fixed external gear, an
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output axls having an eccentric rotor axis neck por-tion is rotated.
Since a rotor made up of peritrochoid internal envelope is rotated
along the inside wall of a housing made up of peritrochoidal curve,
the maximum capacity of a suction chamber and the maximum capacity
of a combustion chamber is the same, fuel mixture sucked in the
suction chamber is compressed and has the minimum capacity, the
fuel mixture is ignited and explodes at that time, the explosion
force rotates the rotor, and the fuel mixture having the minimum
capacity explodes in the combustion chamber the capacity of which
is the same as the maximum capacity of the suction chamber.
Accordingly, part of the explosion energy is used to rotate the
rotor, but the rest of the explosion energy is discharged from ~ ~
an exhaust hole without being used. A Wankel-type rotary engine ~ ~-
has, therefore, a fault that, since explosion energy which is -
available can not be effectively used and radiated without being
used, the thermal efficiency is low and the cost of fuel is high.
A Wankel-type rotary engine also has a structural fault that one
rotation of a rotor generates only one explosion of energy. -~
In a Wankel-type rotary engine, an apex seal as a gas seal is
inserted and engaged at each of the apexes of the triangular
rotor through an elastic member so that the apex seals may rise
and sink freely and may be closely in contact with the inside wall
of a housing. Further, in a rotary engine wherein blades are
inserted and engaged in blade channels which blade channels are
in radial directions and go through or toward the center of a rotor,
the inside wall of a housing along which the rotor rotates is
symmetrical. Since the maximum capacity of a suction chamber and
the maximum capacity of a combustion chamber is the same, this -
kind of a rotary engine has the same fault as that of a conventional
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2 - ~ -
rotary engine. In this kind of a rotary engine, gas seal for
maintaining airtightness between the tip portions of blades and
the inside wall of a housing is attained by pushing the blades in
blade channels outward from a rotor against the inside wall of a
housing by elasticity of springs or by centrifugal force acting
on the blades.
3. SUMMARY OF THE INVENTION
The present invention is to enlarge part of the inside radius
of a sylinder-like housing having sylinder-like inside ~all, form ~ .
a suction chamber and a combustion chamber, dispose a suction hole
at the former end portion of the suction chamber, an ignition ..
device at the former end portion of the combustion chamber, and an
exhaust hole at the latter end portion of the combustion chamber, ~ -.
respectively, make the capacity of the combustion chamber large
compared with the capacity of the suction chamber, insert and ~ ~:
engage blades whic~ can advance and retreat freely in the direction ~ ::
toward the inside wall of the housing in blade channels in radial
directions which go through the center of a cylinder-like rotor
capable of being inserted and engaged in the sylinder-like housing,
and form protruding portions ~ ths surface of the rotor in front
of and at the back of the blade channels going through the center
of the rotor i-n-the rotation:direction ~..the rotor which protruding
portiohs are closely in contact with the circular inside surface
of a connection portion of a compression chamber and the combustion
chamber of the housing.
A first object of the present invention is to provide a
rotary engine which can attain a maximum energy efficiency in
which a suction chamber and a combustion chamber are formed by
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enlarging part of the inside radius of a cyliner-like housing
having cyliner-like inside wall, and the capacity ratio of the
suction chamber and the co~bustion chamber can be freely set and
explosion energy can be effectively transformed into rotation
energy.
A second ohject of the present invention is to provide an -~
effective rotary engine with small mechanical loss wherein a --
rotor begins circular rotation movement directly by explosion
energy and no transmission means such as a gear is necessary.
A third object of the present invention is to provide a
rotary engine wherein a gap between a tip of a blade separating
a compression chamher from an explosion chamber and the circular
inside surface of a connection portion of the compression chamber
and the combustion chamber of the housing which tip of a blade and
inside surface of the connection portion are in close contact with
each other is not enlarged by explosion pressure and compressed gas
does not explode in the compression chamber, that is, does not
explode at an inappropriate tims and a rotor rotates with stability.
A fourth ob~ect of the present invention is to provide a
rotary engine wh~rein each of suction, compression, explosion and ;~
discharge processes occurs continuously in each chamber separated i~
from each other by blades during one rotation of a rotor, thus
the rotor rotates without nonuniformity, and explosion energy can
: .. .~ ;..
smoothly be transformed into rotation energy.
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4. BRIEF DESCRIPTION OF THE DRAWINGS :
The present invention will now be d~scribed with reference to
the attached drawings:
Fig. 1 is a diagramatic partial vertical sectional view of
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a four bladed rotary engine when a gear is in neutral wherein
springs lie in the middle of blacle channels;
Fig. 2 is a diagramatic partial vertical sectional view of
the rotary engine of Fig. 1 just before an explosion;
Fig. 3 is a partial enlarged sectional view of a base end
portion of a blade;
Fig. 4 is a diagramatic partial vertical sectional view of
a three bladed rotary engine just before an explosion provided
with space for confining explosion pressure in the middle of a
rotor;
Fig. 5 is a' partial enlarged sectional view of a three
bladed rotor different from the embodiment shown in Fig. 3 wherein
space for confining explosion pressure is provided with bulkhead;
Fig. 6 is a partial enlarged sectional view of a three hladed
rotor different from the embodiment shown in Fig. 3 wherein holes
are bored in the bulkhead of space for confining explosion pressure;
Fig. 7 is a partial enlarged sectional view of a three
bladed rotor different from the embodiment shown in Fig. 3 wherein
devices for adjusting the degree of aperture are additionally
provided ~n theholes bored in the bulkhead of space for confining
explosion pressure;
Fig. 8 is a diagramatic partial vertical sectional view of
the four bladed rotary engine of Fig. 1 when a gear is in neutral
wherein protruding portions are formed on the surface of the
rotor in front of and at the bac]c of each of the blade channels
in the direction of the rotation of the rotor which blade channels
has springs inside, the protruding portions utilizing protruding
boarcls;
Fig. 9 is an enlargsd perspective view of one of the protruding
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boards of Fig. 8;
Fig. 10 is an enlarged partial vertical sectional view
showing another embodiment of the protruding portions wherein ths
protruding portions are washer based protrusions; anc~
Fig. 11 is an enlarged partial vertical sectional view
showing another embodiment of the protruding portions wherein
the protruding portions are formsd at a rotor.
5. DETAILED n~CRIPTION OF T~ INV~rlTI~
The present invention ha.s ~esn macle to attain the a~ovementions~
objscts, and embodiments of the present invention will be descrihed
in d~tail according to the attached drar~7ings.
(Embodiment 1)
The present e~hoc1imsnt is shown in Figs. 1 - 3. In the
em~odiment, springs lie in ~)lade channsls in radial dirsctions of
a rotor. ;-
A housing 1 comprises a cylinder-liXe body 2 having cylinder-
li'ce inside wall 3. The inside radius of two inside surface portions ~ -;
opposite to each other are enlarged to form portions o a concentric
circle of the circle formed by the cylinrler-liks insids wall 3,
one portion being about 3~ by central angle and the othsr portion
being ahout 60 by central angle. ~oth ol the and portions of ~ ~;
the en~largsd portions smoothly lead to the cylinder-li!e insids ~-
wall 3 an~ a suction cham~er 4 and a combustion chamb~r 5 are
formsd. The combustion chamber 5 has larger capacity than th~
suction chamber 4. A rotor 6 is cylinder-like and inserted and
eng~ged in the cylinder-like inside wall 3. Blade channels 7 are
radially bored so as to go thr~ugh the center of the rotor fi and
6 -
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t~ be at right angles to each other. A bottom portion 8 fi~ed
at the portion where the blade channels 7 cross Pach other divides
each of the blade channels 7 into two equal portions. ~ach of
blades 9 is inserted and engaged in each of the hlade channels 7
divided into equal two portions. At the tip portion of each of
the blades 9, an apex seal made of new ceramic (not shown) is
inserted and engaged so as to maintain the airtightness and to
decrease friction hetween itself and the inside surface of ths
housing 1. At the base end portion of each of the hlades 9, a
seal 10 for containing e~plosion pressure as shown in Fig. 3 is
additionally provi~ed, so as to prevent explosion pressure from
leaking in the base end portion through the blade channels 7.
Springs 11 lie hetween the base ends of the blades 9 and the bottom
-
portion ~ where the blade channels 7 cross each other. The
springs 11 are for pushing the tip portions of the blades 9
against the inside surface of the housing 1 mainly when the rotor
6 is not-in motion and when the rotor 6 rotates at a low speed.
Wllen the rotor 6 rotates at a high speed, coupled with centrifugal
force which acts on each of the blades 9, the sprinys further ~
maintain the airtightness between each of the tips of the blades
9 and the inside surface of the housing 1. When the airtightness
between each of the tips of the blades 9 and the inside surface
of the housing 1 can be maintained by centrifugal force which
acts on each of the blades 9 and which is caused by the rotation
of the rotary engine by a starter when starting, the springs
11 can be omitted. Here, by the blades 9 which go through the
inslde of each of the suction chamber 4 and the combustion chamber
5, the suction chamber 4 is utilized as an air suction chamber
4a and a compression chamber 4b, and the combustion chamber 5 is
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utilized as an explosion chamber 5a and an exhaust
chamber 5b. ~ir suction hole 12 is bored in the housing 1 at the
former end portion of the suction chamber 4 in the rotation
direction a of the rotor 6 and suck fuel mixture. The air
suction hole 12 may be a blowing system provided with a fuel
injection equipment. An ignition equipment 13 is provided in
the housing 1 at the former end portion of the combustion chamber
5 in the rotation direction a of the rotor 6 and comprises a
spark plug, etc (not shown). The ignition equipment 13 is for
igniting and exploding the fuel mixture sucked from the air
suction hole 12 by compressing the fuel mixture at the former end
portion of the combustion chamber 5 with blades 9 according to -~
the rotation of the rotor 6. Here, when the compressed fuel ; -
mixture is ignited and exploded at the former end portion of the -
combustion chamber 5, the areas of the blades 9 which are adjacent ;~
to each other and which form the explosion chamber 5a with airtightness -
at the former end side of the combustion chamber 5 are different, -
and due to the difference of the explosion pressure which acts
on the blades 9, the rotor 6 is rotated. An exhaust hole 14 is
bored in the housing 1 at the latter end portion of the combustion
chamber 5 in the rotation direction a. The exhaust hole 14 is
for discharging exhaust gas which is exploded and burned when the -~
compressed fuel mixture is ignited and exploded at the side of
the former end portion of the combustion chamber 5. Hollows 15
the section of which is arc-like, etc. bored on the surface of
the rotor 6 at the back of each of the blade channels 7 in the
rotation direction of the rotor 6 adjacent to each of the blade
channels 7 are for adjusting the compressibility. By boring the -;~
hollows 15 appropriately, the diameter of the cylinder-like -
portion of the housing 1 and the diameter of the rotor 6 can be
made almost the same, thereby the aforementioned difference of
the area of the blades can be enlarged.
The hollows 15 may be bored in the direction of the circumferen~e
of the surface of the rotor 6 so as to reach the ad~acent blade
channels 7 or the vicinity of the adjacent blade channels 7, and
may additionally have the function as channels which maintain
fuel mixture compressed in the compression chamber 4b at the side
of the latter end of the suction chamber 4 by the blades 9 due to
the rotation of the rotor 6 after being sucked in the air suction
chamber 4a at the side of the former end of the suction chamber
4 and which moves the fuel mixture to the explosion chamber Sa
at the former end of the combustion chamber 5.
(Embodiment 2)
The present embodiment is shown in Fig. 4. Springs 11 are
not in the blade channels 7 and explosion pressure is utilized
in order to maintain the airtightness between the tips of the
blades 9 and the inside surface of the housing 1.
1 is the same kind of a housing as the one of the embodiment
1. The inside diameters of a lower portion of one side of the
cylinder-like inside wall 3 of the housing 1 and a portion from
an upper portion to a lower portion of the other side of the
cylinder-like inside wall 3 facing the lower portion are enlarged
to form portions,of a concentric circle, one at the lower portion
of the one side being about 30 by central angle and the other one
from the upper portion to the lower portion of the other side
being about 130 by central angle. Both of the end portions of ~ ~-
the enlarged portions smoothly lead to the cylinder-like inside
wall 3 and the same kind of a suction chamber 4 and a combustion
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... .. .. . . . . .. ,. ........ ... . ... . . .. . ~ . . . ... . - . . .. :: -
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chamber 5 as the ones of the embodiment 1 are formed. 6 is a
rotor of the same kind as the one of the embodiment 1. Three
blade channels 7 of the same kind as the ones in the embodiment 1
are bored from trisecting points of the circumference of the rotor
6 toward the center of the rotor 6. Blades 9 are of the same
kind as the ones in the embodiment 1 and each of the blades 9 ~-~
are inserted and engaged in each of the blade channels 7. Explosion
pressure intake holes 16 are bored from the surface of the rotor
6 at the back of each of the three blade channels 7 in the rotation
direction a in parallel with each of the blade channels 7 adjacent
to each of the blade channels 7 but not until the explosion intake
holes 16 reach the center of the rotor 6. Each ofspaces~r confining
explosion pressure 17 which leads to each of the blade channels 7 - -
are bored from the side in the center of the rotor 6. Interconnecting
holes 18 which connects each of the explosion pressure intake
holes 16 with the space for confining explosion pressure 17 are
bored from the periphery of the rotor 6, have nonreturn valves 19
built in them, and are embedded, etc. so as to be just in front
of the explosion pressure intake holes 16 and are blocked. A part
of the explosion pressure is taken in the space for confining
explosion pressure 17 through the nonreturn valves 19 of the
interconnecting holes 18 from the explosion intake holes 16, thereby
blades 9 in each of the blade channels 7 are pushed strongly
against the inside surface of the housing 1 and the airtightness
between the tip of each of the blades 9 ~nd the inside surface
of the housing 1 is raised. 12, 13 and 14 are an air suction
hole, an ignition equipment and an exhaust hole, respectively,
which are the same kind as the ones of the embodiment 1. A
round-bar-like divider portion 20 is attached to a portion of the
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h~using 1 between the air suction hole 12 and the exhaust hole 14.
The divider portion 20 is provided to raise the airtightness
between the suction chamber 4 and the combustion chamber 5 when,
as in the present embodiment, the suction chamber 4 and the
combustion chamber 5 are adjacent to each other, and the divider
portion 20 can he attached so as to rotate together with the
rotor 6. The rotation of the rotor 6 is, as in the embodiment 1,
caused by the difference in the explosion pressure acting on the
blades 9 which are exposed to an explosion chamber 5a on the former
end side of tne combustion chamber 5 and are adjacent to each
other.
(Embodiment 3)
The present embodiment is shown in Fig. 5, in which the
explosion pressure in the space for confining explosion pressure -
17 of the embodiment 2 is utilized only for maintaining the
airtightness between the inside surface of the housing 1 and ~he
blade 9 which separates the compression chamber 4b Gn the latter
end side of the suction chamber and the explosion chamber 5a on
the former end side of the combustion chamber 5.
Bulkhead 21, as shown in Fig. 5, divides the inside of the
space for confining explosion pressure 17 of Fig. 4. The bulkhead
21 comprises three blades radially formed each of the blades
connecting the slde nearer to the rotor 6 of each of the interconnecting
holes 18 in each of the spaces for confining 17 which interconnecting
holes 18 connects the explosion pressure intake holes 16 with the spaces
for confining 17 with the center of the rotor 6. The bulkhead 21 makes
each of the explosion pressure intake holes 16 connect with a base
portion of each of the blade channels 7 adjacent to each of the explosion ~ ;
- 11 -
pressure intake holes 16 in the opposite direction to the rotation
direction a of the rotor 6. The bulkhead 21 utilizes explosion -
pressure only for pushing a blade 9 which is adjacent to the -
explosion chamber in the opposite direction to the rotation -
direction of the rotor 6 against the cylinder-like inside wall 3
of the housing 1. Thus, the bulkhead 21 prevents explosion pressure -
from leaking in the suction chamber 4, and at the same time, makes
the force pushing the tip of a blade 9 in the combustion chamber
5 and in the normal direction of the rotation of the rotor 6
against the inside wall of the housing 1 reduced, except when it
is appropriate to push the blade 9 against the inside wall of the
housing 1, and makes the friction decreased between the tip of -
the blade 9 and the inside wall of the housing 1 to rotate the
rotGr 6 with ease.
(Embodiment 4)
The present embodiment is shown in Fig. 6. Holes 22 are
provided on the bulkhead 21 and part of explosion pressure is
utilized also to maintain the airtightness between the tip portion
of a blade 9 in the combustion chamber 5 and the inside surface
of the housing 1.
The holes numbered as 22 are bored in the three blades of
the bulkhead 21, respectively. By boring said holes 22, explosion -~
pressure which is continuously caused and which acts only on a
blade 9 in the opposite direction to the rotation direction of the
rotor due to the bulkhead 21 provided as in the embodiment 3 is
controlled and utilized so as to act on each of the blades 9
equally, without intermission, and effectively.
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(Embodiment 5)
The present embodiment is shown in Fig. 7. Devices for adjusting
the degree of aperture 23 are additionally provided at the holes
22 of the bulkhead 21 of the embodiment 4. The degree of the
airtightness between the tip of each of the blades 9 in the
combustion chamber 5 and the inside surface of the housing 1 is
adjusted by remote control of the devices for adjusting the degree
of aperture 23.
The devices for adjusting the degree of aperture 23 utilize
aperture diaphragms as in a camera, etc. and adjust the degree of
aperture of the holes 22 according to the friction between the
inside wall of the housing 1 and the tips of the blades 9, which
friction depends on the nature, for example, viscosity, of the
fuel. When great friction acts, the degree of aperture is made
small and the rotation of the blades 9 in the suction chamber 4
and the combustion chamber 5 is made easy.
(Embodiment 6)
The present embodiment is shown in Figs. 8 and 9. The same
kind of a housing 1 and a rotor 6 as in the embodiment 1 is used
and explosion pressure in the explosion chamber 5a on the former
end side of the combustion chamber 5 is prevented from leaking
in the compression chamber 4b on the latter end side of the suction
chamber 4. Cicular inside surface 24 is a part of the cylinder-like
inside wall 3 and connects the compression chamber 4b on the
latter end side in the rotation direction a of the rotor 6 of the
suction chamber 4 with the explosion chamber 5a of the former
: ,-
~end side in the rotation direction a of the rotor 6 of the combustion
chamber 5. ~our blades 9 can freely advance and retreat in the
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blade channels 7 by springs 11 laid between the base portion of the
crossing portion of the cross-shaped blade channels 7 and the
blades as in the embodiment 1. A blade 9a is the one among the
blades 9 which is in contact with the circular inside surface 24
separating the compression chamber 4b from the explosion chamber
5a. Protrusions 25 are provided on the surface of the rotor 6 in
front of and at the back of the cross-shaped blade channels 7
in the rotation direction of the rotor 6. The protrusions 25 are
in contact with the circular inside surface 24 connecting the
compression chamber 4b with the explosion chamber 5A. In the
present embodiment, channels 26 in parallel with each of the
blade channsls 2 are bored in the rotor 6 in front of and at the
back of each of the blade channels 2 in the rotating direction a
of the rotor 6. Cylinder~ e enlarged portions 26a are formed
at the base portions of the channels 26. Protruding boards 27 to
be inserted and engaged in the channels 26 have cylinder-like
enlarged portions 27a formed at the base portions of the protruding
boards 27 to be inserted and engaged in the cylinder-like enlarged
portions 26a. The cylinder-like enlarged portions 27a at the -
ba8e portions are inserted and enqaged from the side in the
cylinder-like snlarged portions 26a of the channels 26 so that
the tip portions of the protruding boards 27 are in contact with
the circular inside surface 24 of the housing 1 connecting the
compression chamber 4b with the explosion chamber 5a.
(Embodiment 7)
The present emhodiment is shown in Fig. 10. Protrusions as
the protruding portions 25 of the embodiment 6 are screw~d to
the surface of the rotor 6.
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Attaching portions 2~ are shaped and hored on the surface
of the rotor 6 in front of and at the back of each of the blade
channels 7 in the rotation direction a of the rotor 6 so as to
be in parallel with the blade chann~ls 7. I~asher based protruding
portions 29 have washers 29a, respectively, which are fit in the -
attaching portions 28. Protruding pieces 29b are formed which
protrude from the washers 29a, respectively, in a reversed T shape,
in an L shape, etc. Each of the washers 29a is fixed by screwing
to each of the portions of the rotor 6 at each of the attaching
portions 28. The tip portion of each of the protruding pieces 29b
is in contact with the circular inside surface 24 connecting the
compression chamber 4b with the explosion chamber 5a of the
housing 1. A reversed-T-shaped washer based protruding portion
29 and an L-shaped washer based protruding portion may be mixedly
used as shown in Fig. 10, or, only one of them may be used.
~Embodiment 8)
The present embodiment is shown in Fig. 11. The protruding --~-
portions 25 of the embodiment 6 are directly formed at the rotor 6.
:- "
~ Protrusions 31 are formed on the surface of the rotor 6 in
.f.~ front of and at the back of each of the blade channels 7 in the
rotatlon direction a of the rotor 6 so as to be in parallel with
each of the blade channels 7. The tip portions of the protrusions
, 31 are'in contact with the circular inside surface 24 which connects
,
the compression chamber 4b with the explosion chamber 5a and are
made to be protruding portions 25.
Further, in the embodiments 1 through 8, when the capacity of
~ the suctlon chamber 4 and the capacity of the combustion chamber
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5 are the same, explosion energy can not be effectively utilized
for the rotation of the rotor 6, compared with one when the
capacity of the combustion chamber 5 is made bigger than the
capacity of the suction chamber 4. However, as in the embodiments,
an output axis is not rotated by the engagement of an internal
gear and an external gear like a conventional Wankel-type rotary
engine but an output axis is directly connected with the rotor 6,
explosion energy can be directly transformed into circular rotation
movement of an output axis through the rotor 6, thereby energy loss
in this part is small and, as a whole, the fuel consumption is
smaller than in a conventional Wankel-type rotary engine.
The present invention has the ahovementioned structure. As
the radius of the cylinder-like inside wall is partially enlarged
to form portions of a concentric circle of the circle formed by
the cylinder-like inside wall 3 and to form the suction chamber 4
and the combustion chamber 5, the maximum capacity of the combustion
chamber enclosed with the inside wall of the housing of peritrochoidal
curve and the rotor of peritrochoid internal envelope is not fixed ~-
to be equal to the maximum capacity of the suction chamber like a
conventional Wankel-type rotary engine. The ratio of the maximum -
capacity of the suction chamber and the maximum capacity of the
combustion chamber can be freely set by adjusting the size of the
portions where the radius of the cylinder-like inside wall is
enlarged. So the combustion chamber 5 can be enlarged enough
compared with the suction chamber 4 and explosion energy
which was conventionally radiated from the exhaust hole 14 without
being used can be effectively used in the circular rotation. As,
different from a conventional Wankel-type rotary engine in which
an output axis is rotated by the engagement of an inter~al gear
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with an external gear, explosion energy can be directly transformed
into rotation movement of the output axis (not shown) through
the rotor 6, energy is not lost, heat efficiency is raised, and
fuel consumption can be substantially improved. The weak points
of a conventional Wankel-type rotary engine wherein a rotor
rotates in the housing while moving vertically, which is a
quasi-reciprocating movement, can be thus resolved.
Moreover, as continuous explosion strokes can be obtained
within one housing, compared with a Wankel-type rotary engine and
a reciprocating engine wherein explosion strokes are intermittent,
more effective and smooth rotation (driving force) can be obtained.
Further, as protruding portions 25 which are in contact with -~
the circular inside surface 24 connecting the compression chamber
: : :
4b and the explosion chamber 5a of the housing 1 are provided on ~-
the surface of the rotor 6 in front of and at the back of each of
the blade channels 7 which go through the center of the rotor 6
~-,
in the rotation direction a of the rotor 6, three points, that is, ~ ~-
the blade 9a, a protruding portion 25 in front of the blade 9a, ~-
and a protruding portion 25 at the back of the blade 9a are in
contact with the circular inside wall 24 connecting the compression
chamber 4b with the explosion chamber 5a. As the protruding
portions 25, different from the blades 9 and 9a, do not advance or -~
retreat in the blade channels 7 by the springs 11, there is only -~
a slight gap between the protruding portions 25 and the circular
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inside wall 24 of the housing 1 necessary for the rotor 6 to rotate
in the circular inside surface 24 of the housing 1. Even when
explosion pressure acts, the gap between the tips of the protruding
portions 25 and the circular inside surface 24 is not expanded,
explosion pressure in the explosion chamber 5a does not act ~ ~
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between the protruding portions 25 through the gapj the gap between
the tip of the blade 9a between the protruding portions 25 and the
circular inside surface 24 is not expanded, and the tip of the
hlade 9a is pushed against the inside surface 24 with stability
hy the elasticity of the spring 11 or the centrifugal force, so
the explosion pressure is prevented from leaking in the compression
chamber 4b, explosion at an inappropriate time is prevented, and
the rotor 6 is smoothly rotated.
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