WO1995030080A1 - Ensemble soupape pour moteur a combustion interne - Google Patents

Ensemble soupape pour moteur a combustion interne Download PDF

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Publication number
WO1995030080A1
WO1995030080A1 PCT/JP1995/000836 JP9500836W WO9530080A1 WO 1995030080 A1 WO1995030080 A1 WO 1995030080A1 JP 9500836 W JP9500836 W JP 9500836W WO 9530080 A1 WO9530080 A1 WO 9530080A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
intake
exhaust
internal combustion
combustion engine
Prior art date
Application number
PCT/JP1995/000836
Other languages
English (en)
Japanese (ja)
Inventor
Noriyuki Okumoto
Original Assignee
Car And Service Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Car And Service Corporation filed Critical Car And Service Corporation
Publication of WO1995030080A1 publication Critical patent/WO1995030080A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F01L7/02—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves
    • F01L7/026—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves with two or more rotary valves, their rotational axes being parallel, e.g. 4-stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F01L7/02—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves
    • F01L7/021—Rotary or oscillatory slide valve-gear or valve arrangements with cylindrical, sleeve, or part-annularly shaped valves with one rotary valve
    • F01L7/022—Cylindrical valves having one recess communicating successively with aligned inlet and exhaust ports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F01L2001/0537—Double overhead camshafts [DOHC]

Definitions

  • the present invention relates to a valve device for an internal combustion engine.
  • the prime mover used for automobiles, motorcycles, ships, etc. is a four- or two-cycle gasoline engine or a diesel engine.
  • Each of these internal combustion engines extracts the kinetic energy by repeating the process of intake, compression, explosion, and exhaust, and controls the intake and exhaust (exhaust for a uniflow type diesel engine).
  • FIG. 17 shows a valve device except for a small two-stroke gasoline engine used for autopipies.
  • FIG. 17 shows a valve device of a conventional four-stroke gasoline engine.
  • the valve V is a member generally formed in a mushroom shape, that is, a mushroom valve (povette valve).
  • the mushroom valve is moved back and forth in the axial direction by a valve operating mechanism such as a cam C or a tap Ta at the top of the intake and exhaust pipes. It opens and closes.
  • valve systems In the case of automobiles, for example, the recent high performance and high output of engines are remarkable, but the core of this is the improvement of valve systems. In order to achieve higher power and higher efficiency in internal combustion engines, improvements have been made to improve the intake efficiency or increase the intake air amount, and to increase the rotation speed without sacrificing low engine speed. ing. Under these circumstances, the use of multiple valves and variable valve timing (multiple force, rocker arms, etc.) are being promoted, but the obstacles here are the problems that the conventional valve device itself has.
  • the conventional valve device has many problems due to its structural complexity and the like, without exhibiting such problems. There was no great expectation of future development and applicability, and the development of a new valve installation was awaited.
  • a valve device is characterized in that a hole through which a cylindrical body is rotatable is formed in an intake or exhaust passage reaching the inside of a cylinder.
  • a valve having a closing portion for closing the passage and a flow passage for opening the passage on the same cross section perpendicular to the rotation axis so as to open and close the exhaust passage Characterized by being provided rotatably.
  • the valve is provided in each cylinder of the internal combustion engine having a plurality of cylinders, and the valves are connected integrally with their rotating shafts coincident.
  • the valve may be a common valve that opens and closes both the intake passage connecting the inside of the cylinder and the intake pipe and the exhaust passage connecting the inside of the cylinder and the exhaust pipe.
  • the flow passage may be a groove having a split circle shape in a cross section perpendicular to the rotation axis of the valve, or a through hole formed so as to intersect with the rotation axis of the valve. You can also.
  • the valve may be attached to the intermittent water heater and rotated intermittently. In the valve device configured as described above, when the valve rotates in the hole, and the intake or exhaust passage is closed by the closing portion, the passage is closed, and the intake or exhaust passage and the flow passage are connected. The communicating passage is opened.
  • one valve opens and closes the intake or exhaust passage of each of the plurality of cylinders.
  • the valve is common to the intake and exhaust passages, one passage opens and closes both passages.
  • the flow passage is a concave groove having a split circle in a cross section perpendicular to the rotation axis of the valve, an intake or exhaust passage is opened each time the valve rotates once, and the flow passage is connected to the rotation shaft of the valve. If the through hole intersects with the valve, the intake or exhaust passage is opened each time the valve rotates half a turn. When the valve is intermittently rotated, the intake or exhaust passage is quickly opened and closed.
  • Fig. 1 One embodiment of the valve device of the present invention embodied in a four-stroke gasoline engine.
  • Figure 2 Front cross-sectional view showing the state where compression has also started
  • Figure 3 Front sectional view showing the same exploded state
  • Fig. 4 Front cross-sectional view showing a state in which exhaust is also started
  • FIG. 5 Perspective view showing the valve used in the above embodiment.
  • Figure 6 Partial enlarged front sectional view showing opening and closing of the intake pipe of the above embodiment.
  • Figure 7 Partial enlarged front sectional view showing opening and closing of the exhaust pipe of the above embodiment.
  • Figure 8 Conceptual plan view showing the relationship between the cylinders, valve flow paths, and the inner diameters of the intake pipe and exhaust pipe, etc. of the above embodiment
  • Fig. 9 Partial enlarged front sectional view for explaining means for changing valve timing
  • Fig. 10 Partial enlarged sectional view in which a spark plug is mounted at a position different from that of the above embodiment
  • Fig. 11 Shows valves and the like of another embodiment. Perspective view and illustration
  • FIG. 1 Front sectional view showing the state in which intake is started with the engine equipped with the valve shown in Fig. 11
  • FIG. 14 Front sectional view showing the prone state of the explosion
  • FIG. 15 Cross-sectional front view showing a state in which exhaust is also started
  • FIG. 16 is a front sectional view illustrating a state in which the engine has started inhaling, illustrating another embodiment.
  • Fig. 17 Front cross-section illustrating the valve arrangement g of a conventional 4-stroke gasoline engine Figure
  • valve device One embodiment of a valve device according to the present invention will be described in detail with reference to FIGS.
  • the valve device of this example is embodied in a 4-cycle gasoline engine (in-line 4-cylinder) for an automobile.
  • the cylinder block 1 is composed of a cylinder part 2 having four cylinders (only one is shown) and a cylinder head 3.
  • a pair of intake pipes is provided for each cylinder. 4 and the exhaust pipe 5 are erected in a V-shaped section.
  • the two pipes 4 and 5 are the same as those known in the art.
  • the air-fuel mixture is supplied from the intake pipe 4 into the cylinder, and the combustion gas in the cylinder is discharged from the exhaust pipe 5. I have.
  • a hole (cylindrical protruding portion) 6 through which a cylindrical body having a predetermined diameter is rotatable is provided in the horizontal direction in the cylinder arrangement direction.
  • the valve 11 in this example has a cylindrical shaft (rod) having an outer diameter slightly smaller than the inner diameter of the hole 6, and has a metal sprocket at one end. G (gear) 1 2 is attached.
  • the valve 11 in this example is formed of metal, ceramic, or the like.
  • the outer peripheral surface (arc portion) of the valve 11 forms a closing portion 13 for closing the intake passage 4a or the exhaust passage 5a, as will be described later.
  • Four flow passages 14 and 14 are provided by shifting the bottom (cut bottom surface) 15 of each flow passage by 90 degrees, and a closing portion 13 for closing passages 4 a and 5 a is provided.
  • a flow passage 14 that opens the passage is provided on the same section perpendicular to the rotation axis.
  • the flow passage 14 has a concave groove of a predetermined width W which has a split circle shape (notch shape) in a cross section perpendicular to the rotation axis of the valve 11.
  • the valve 11 of the present example is rotatably inserted into the hole 6, and in the inserted state, each of the flow passages 14, 14 is located at the position of four cylinders, each of the intake pipes 4 and It is provided so as to correspond to the position of the exhaust pipe 5 respectively.
  • the valve of this example designates a common valve for opening and closing both the intake passage 4a connecting the inside of the cylinder and the intake pipe 4 and the exhaust passage 5a connecting the inside of the cylinder and the exhaust pipe 5.
  • the valve 11 has a cylindrical shaft, and is inserted into a hole 6 as a mounting part of the valve on the cylinder side from the axial direction, and is assembled. ⁇ As shown in Fig. 6, the angle A between the leading edge 14a of the flow passage 14 and the trailing edge 14b is less than 180 degrees (in this example, slightly more than 135 degrees).
  • the angle B between the open point 4 k and the closed point 4 h on the exhaust side is less than 45 degrees c.Also, as shown in Figure 7, the angle C between the open point 5 k and the closed point 5 h on the exhaust side is also The angle D between the closing point 4 h on the intake side and the opening point 5 k on the exhaust side is also slightly less than 45 degrees.
  • the valve 11 rotates in the hole 6 to open and close the intake or exhaust passages 4a and 5a.
  • the axial radiation W of the flow passage 14 is formed smaller than the inner diameter D s of the cylinder and slightly larger than the inner diameter 4 d of the intake pipe 4 (and the exhaust pipe 5), as shown in FIG. In use, the above members are exposed to heat.
  • valves and cylinders have the same coefficient of thermal expansion, or the latter is formed of a material that is slightly larger.
  • a timing belt (not shown) is wrapped between the sub-block 12 and the crankshaft sub-rocket (not shown), and the rotation of the crank shaft allows the valve 11 to be tilled. I'm sorry.
  • T is a spark plug, and pistons P and the like have the same configuration as the conventional one.
  • valve 11 rotates in a clockwise manner.
  • the opening and closing of the intake pipe 4 will be described (see Fig. 6).
  • the valve 11 rotates and the leading edge 14 a of the flow passage 14 passes through the opening 4 k on the suction side (solid line in FIG. 6)
  • the suction pipe 4 and the flow passage 14 of the valve 11 communicate with each other.
  • the intake pipe 4 is opened.
  • the valve 11 rotates to reach the position indicated by the two-dot chain Di in FIG. 6, and when the flow path 14 reaches the closing point 4 h, the suction pipe 4 is closed, but the suction pipe 4 is closed.
  • the angle at which the valve 11 rotates when the valve 4 is open is set to slightly more than 90 degrees.
  • the valve 11 rotates and the suction pipe 4 is closed again until the leading edge 14a of the flow passage 14 reaches the open point 4k.
  • the exhaust pipe 5 will be described (see FIG. 7).
  • the intake pipe 4 is closed (the double dotted line in FIG. 6)
  • the valve 11 rotates about 180 degrees, and The front 14a of the path 14 passes through the open side 5k on the exhaust side (solid line in Fig. 7), and the exhaust pipe 5 and the flow path 14 of the valve 11 communicate with each other, and the exhaust pipe 5 is opened.
  • the exhaust pipe 5 is closed (two-dot chain line in FIG. 7), but the exhaust pipe 5 is opened.
  • the angle at which the valve 11 rotates in this state is slightly over 90 degrees. Thereafter, the valve 11 rotates and the exhaust pipe 5 is closed again until the leading edge 14a of the flow passage 14 reaches the open point 5k.
  • the intake pipe 4 and the exhaust pipe 5 are opened and closed by one valve 11.
  • the valve 11 makes one revolution during the four stages of compression, explosion, and exhaust.
  • the suction stroke as shown in FIG. 1, first, the piston P is located substantially at the top dead center.
  • the leading edge 14a of the flow passage 14 is almost at the opening point 4k on the suction side (solid line in FIG. 1).
  • the valve 11 rotates to open the suction pipe 4.
  • the piston P descends while sucking the mixture of fuel and air, as shown by the two-dot chain line in FIG.
  • the trailing edge 14 b of the valve 11 reaches the closing point 4 h on the intake side and closes the intake pipe 4.
  • the suction stroke ends.
  • this example functions as a valve device of a four-cycle gasoline engine with a very simple configuration including one valve. Therefore, the number of parts can be reduced and the size of the upper part of the engine can be reduced.
  • valve timing from the above example can be obtained by changing the size (opening cross-sectional area) of the flow path 14, the intake pipe 4, the exhaust pipe 5, and the like of the valve 11 in the above. Specifically, it is necessary to increase the angle A between the front end 14a and the rear edge 14b of the flow passage 14 in the above, or to set the angle B between the opening point 4k and the closing point 4h on the intake side.
  • the angle between the opening point 5 k on the exhaust side and the closing point 5 h (, by reducing the angle D between the closing point 4 h on the intake side and the opening point 5 k on the exhaust side, the suction pipe 4 and the exhaust pipe 5 The overlap that both can open can be increased.
  • a movable piece Ka is provided at an opening point 4 k and a closing point 4 h on the intake side, and the movable piece K a is provided along the inner peripheral surface of the hole 6 by swing means (not shown).
  • the valve timing can be changed directly.
  • the movable piece may be provided at one or both of the open point and the close point on one or both of the intake side and the exhaust side.
  • the spark plug T may be provided obliquely. It is also possible to attach ignition plugs to the lower part of both the intake pipe and the exhaust pipe. Further, instead of using ceramic only for the valve, ceramic can be used for other members by taking advantage of the simplicity of the configuration. In particular, the inner peripheral surface of the hole for mounting the valve If is made of ceramic, heat resistance and abrasion resistance can be further improved.
  • valve is continuously rotated, but may be intermittently rotated.
  • the flow passage 24 is formed as a through hole formed so as to intersect with the rotation axis (Di) of the valve 21.
  • the valve 21 is provided for each cylinder on the intake side and each cylinder. This is an embodiment in which each is used independently on the exhaust side (however, only one cylinder is shown). More specifically, a step motor M as an intermittent driving means capable of arbitrarily rotating and stopping is attached to one end of the valve 21 of the present example, and a position display means 25 is provided at the other end.
  • the cylinder head (not shown) is provided with a position detection device corresponding to the position display means 25, and the position detection device is connected to a central control unit (hereinafter referred to as CPU). Further, a signal such as an engine speed and a load is input to the CPU, and a step motor M is connected to the CPU.
  • CPU central control unit
  • the CPU calculates an optimal valve timing according to signals from the position detecting device, signals such as engine speed and load, and outputs a signal to the step motor M. Then, the step mode M repeats the rotation and the stop according to the signal, and drives the valve 21 at a timing according to the speed and the like.
  • the exhaust side valve 21 b rotates 90 degrees (clockwise) and stops as indicated by the two-dot chain line, and passes through the flow passage 24 b. While opening the exhaust pipe 35, the piston P rises while exhausting the combustion gas (two-dot chain line in Fig. 15). Then, when the piston P almost reaches the top dead center, the valve 21 b rotates 90 degrees again (clockwise) and stops, closing the exhaust pipe 35 (FIG. 12). During this time, the intake side valve 21a is stopped with the intake pipe 34 closed.
  • each valve 21a and 21b since each valve 21a and 21b is arbitrarily rotated and stopped, the valve can be opened and closed quickly, and the effective ventilation time can be extended. Since the valve can be opened and closed at the optimum valve timing according to the engine speed and load, high output and fuel saving can be achieved. Also, during explosion combustion, both valves 21a and 21b are stopped, so that airtightness can be ensured. Furthermore, the rotation speed of the valves 21a and 21b may be one-fourth of the rotation speed of the crankshaft, that is, the piston 2 reciprocates twice in four cycles, that is, while the crankshaft makes two rotations, the valve 2 1 Since a and 21b rotate half a turn, they can cope with high rotation. FIG.
  • valve 11 shows a valve 11 having a flow path 14 formed of a concave groove having a predetermined width in a split circle shape (notch shape) as in the first embodiment.
  • a valve 11 having a flow path 14 formed of a concave groove having a predetermined width in a split circle shape (notch shape) as in the first embodiment.
  • each of the exhaust pipes 35 is used independently.
  • both valves 11 1 and 11 1 are rotated in a counterclockwise direction (the valve makes one rotation while Biston P makes two reciprocations) so that each tube 3 4 and 3 5 can be opened and closed. I have to.
  • Fig. 16 shows the suction stroke.
  • a four-cycle gasoline engine has been described, but the invention can also be embodied in a diesel engine (four-cycle, uniflow type, etc.) valve device.
  • a two-stroke gasoline engine generally does not have a valve device, but if it is embodied in the valve device, there is a possibility that the performance can be improved without impairing the characteristics of small size and light weight.
  • the two-stroke engine has a feature that it is inferior in fuel efficiency to the four-stroke engine but small in size, and is generally used as a small power engine. According to the present invention, it is possible to reduce the size of a conventionally large four-stroke engine, and in the field where a two-stroke engine was conventionally selected, it is also possible to provide a small four-stroke engine with good fuel efficiency. It is.
  • the number of parts can be reduced as a whole of the valve device, and therefore, the cost can be reduced and the size can be reduced. Also, since the valve does not reciprocate linearly but only rotates, it can respond to high-speed rotation without problems such as resonance. In addition, vibration and noise are expected to be reduced in combination with the reduced number of moving members.
  • the intake or exhaust passage is fully opened, there is no obstacle such as the shaft of the mushroom valve. Therefore, the flow of intake and exhaust can be made smoother or more efficient, and the effective area of the opening can be increased. .
  • the valves are connected integrally for a multi-cylinder cylinder, the intake or exhaust passage of the multiple cylinders can be opened and closed with one valve, further reducing the number of parts. . In the conventional valve device, it is necessary to divide the cylinder block and the cylinder head in order to mount the mushroom valve. However, according to the present invention, it is possible to integrally form both of them. .
  • valve is used in common for the fluid passages on the intake and exhaust sides, one valve can open and close both passages. In this case, the number of parts can be further reduced. Further, when the flow passage is formed as a concave groove having a split circle shape in a cross section perpendicular to the rotation axis of the valve, the shape and the structure can be simplified. If the flow passage is a through hole that intersects with the rotation axis of the valve, the intake or exhaust passage can be opened each time the valve makes a half turn, so that it is possible to cope with high tillage. Further, in the case where the valve is rotated intermittently, the effective ventilation time can be extended by quickly opening and closing the intake or exhaust passage, and therefore, the intake efficiency can be improved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

Dans un ensemble soupape de structure simple et capable de soutenir des performances plus élevées, pour un moteur à combustion interne, un trou (6) est pratiqué, afin de permettre la rotation d'un corps cylindrique, soit dans une voie d'admission (4a) conduisant à l'intérieur d'un cylindre (2), soit dans une voie d'échappement (5a). Une soupape (11), montée rotative dans le trou (6), présente, dans la même section perpendiculaire à un axe de rotation, une partie de fermeture (13) refermant la voie d'admission (4a) ou la voie d'échappement (5a), et une voie de communication (14) permettant d'ouvrir la voie d'admission (4a) ou la voie d'échappement (5a), assurant ainsi l'ouverture ou la fermeture sélective de ces deux voies lorsque la soupape est mise en rotation.
PCT/JP1995/000836 1994-04-28 1995-04-27 Ensemble soupape pour moteur a combustion interne WO1995030080A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6/114286 1994-04-28
JP11428694A JPH07293214A (ja) 1994-04-28 1994-04-28 内燃機関のバルブ装置

Publications (1)

Publication Number Publication Date
WO1995030080A1 true WO1995030080A1 (fr) 1995-11-09

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ID=14634049

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Application Number Title Priority Date Filing Date
PCT/JP1995/000836 WO1995030080A1 (fr) 1994-04-28 1995-04-27 Ensemble soupape pour moteur a combustion interne

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JP (1) JPH07293214A (fr)
WO (1) WO1995030080A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2517763A (en) * 2013-08-30 2015-03-04 Newlenoir Ltd Piston arrangement and internal combustion engine

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100248333B1 (ko) * 1995-12-26 2000-04-01 정몽규 자동차 기관의 흡배기 밸브장치
KR100233730B1 (ko) * 1995-12-31 1999-12-01 정몽규 로테이션 밸브 구조
KR100245877B1 (ko) * 1997-07-30 2000-04-01 정몽규 엔진의 밸브 장치
WO2007057965A1 (fr) * 2005-11-18 2007-05-24 Ataka Engineering Co., Ltd Moteur a combustion interne
JP7114079B2 (ja) * 2018-03-30 2022-08-08 満夫 山田 発電機能付き冷房装置
RU198601U1 (ru) * 2019-12-17 2020-07-20 Анатолий Константинович Маришкин Бесклапанный газораспределительный механизм четырёхтактного двигателя внутреннего сгорания

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60249603A (ja) * 1984-05-23 1985-12-10 Fuji Heavy Ind Ltd 内燃機関のロ−タリバルブ装置
JPS63166605U (fr) * 1987-04-17 1988-10-31
JPS6359009B2 (fr) * 1982-08-05 1988-11-17
JPH0447107A (ja) * 1990-06-14 1992-02-17 Shigeru Sendai ４サイクルエンジン用．ｓ，ｃバルブ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6359009B2 (fr) * 1982-08-05 1988-11-17
JPS60249603A (ja) * 1984-05-23 1985-12-10 Fuji Heavy Ind Ltd 内燃機関のロ−タリバルブ装置
JPS63166605U (fr) * 1987-04-17 1988-10-31
JPH0447107A (ja) * 1990-06-14 1992-02-17 Shigeru Sendai ４サイクルエンジン用．ｓ，ｃバルブ

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2517763A (en) * 2013-08-30 2015-03-04 Newlenoir Ltd Piston arrangement and internal combustion engine
GB2517763B (en) * 2013-08-30 2017-12-27 Newlenoir Ltd Piston arrangement and internal combustion engine
US10260411B2 (en) 2013-08-30 2019-04-16 Newlenoir Limited Piston arrangement and internal combustion engine

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