WO2010084831A1 - Moteur à piston doté d'une partie permettant de recouvrir une surface de fond d'une partie de couvercle de soupape champignon - Google Patents

Moteur à piston doté d'une partie permettant de recouvrir une surface de fond d'une partie de couvercle de soupape champignon Download PDF

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Publication number
WO2010084831A1
WO2010084831A1 PCT/JP2010/050446 JP2010050446W WO2010084831A1 WO 2010084831 A1 WO2010084831 A1 WO 2010084831A1 JP 2010050446 W JP2010050446 W JP 2010050446W WO 2010084831 A1 WO2010084831 A1 WO 2010084831A1
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WO
WIPO (PCT)
Prior art keywords
valve
cylinder
spike
overhead
combustion chamber
Prior art date
Application number
PCT/JP2010/050446
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English (en)
Japanese (ja)
Inventor
矢尾板康仁
Original Assignee
Yaoita Yasuhito
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Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=42355885&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2010084831(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Yaoita Yasuhito filed Critical Yaoita Yasuhito
Priority to CN201080003207.4A priority Critical patent/CN102216586A/zh
Publication of WO2010084831A1 publication Critical patent/WO2010084831A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0276—Actuation of an additional valve for a special application, e.g. for decompression, exhaust gas recirculation or cylinder scavenging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B19/00—Engines characterised by precombustion chambers
    • F02B19/12—Engines characterised by precombustion chambers with positive ignition
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B19/00—Engines characterised by precombustion chambers
    • F02B19/16—Chamber shapes or constructions not specific to sub-groups F02B19/02 - F02B19/10
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D15/00—Varying compression ratio
    • F02D15/04—Varying compression ratio by alteration of volume of compression space without changing piston stroke
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to a piston engine having a component that covers the bottom surface of an umbrella portion of a spike valve. This component occupies the space of the combustion chamber facing the bottom surface of the soot valve installed outside the main cylinder when the combustion chamber is expanded outside the main cylinder.
  • FIG. 17 shows the side valve engine described in Patent Document 3 in which the efficiency is reduced.
  • a combustion chamber space exists between one end of the guide hole in FIG. 17 facing the combustion chamber and the valve seat for the intake valve. Further, in FIG.
  • the combustion chamber is expanded outside the volume variable member 117 when the direction of the volume variable member is viewed from the cylinder center axis. This expanded portion increases the combustion chamber volume.
  • the guide holes are indicated by the numeral 118.
  • the intake valve is shown at 113.
  • the variable volume member is shown at 117.
  • the combustion chamber is indicated by the numeral 127.
  • a pair of an intake valve and an exhaust valve are installed on the side of the cylinder outer periphery. Therefore, the sum of the area of a pair of intake valve and exhaust valve of the side valve type internal combustion engine of Patent Document 3 is smaller than that of the engine in which four valves are installed on the wall surface of the combustion chamber facing the upper surface of the piston.
  • the portion of the variable volume member protruding into the combustion chamber is heated by the combustion gas and heated to a high temperature while the intake valve is closed.
  • Piston-type engines burn intermittently. Therefore, in the piston type engine, the inner wall surface of the combustion chamber is cooled by the intake air. For this reason, in the spark ignition engine, an extinction layer (quench zone) of the mixture is formed along the inner wall surface of the combustion chamber. The flameproof layer prevents the inflow of high heat to the inner wall of the combustion chamber.
  • the exhaust valve When the exhaust valve is open, the bottom surface of the umbrella portion of the exhaust valve and the upper surface of the umbrella portion facing the gas passage are both in contact with the combustion gas. Then, the temperature of the exhaust valve rises.
  • the piston has a high load, it is difficult to form an extinguishing layer of the air-fuel mixture along the bottom surface of the umbrella portion of the exhaust soot valve.
  • the engine of patent document 2 is shown in FIG.
  • the sliding valve of the third aspect described in Patent Document 2 is used as an exhaust valve, the upper surface and the lower surface of the first compression ring of the sliding valve are exposed to the combustion gas at the start of the exhaust stroke.
  • the first compression ring is shown at 108. Therefore, the first compression ring is heated by the combustion gas to a temperature higher than the combustion temperature of the lubricating oil.
  • the first compression ring described above burns.
  • the engine of Patent Document 2 forms a sub cylinder on the outside of the main cylinder.
  • the first objective is to increase the compression ratio of a piston engine that has a valve on the wall of the combustion chamber extended outside the main cylinder.
  • the second purpose is to cool the exhaust valve.
  • the third purpose is to improve the fuel efficiency of the piston engine.
  • the configuration of the piston engine of the first aspect of the present invention will be described below.
  • the piston type engine according to the present invention has a cylinder head, a cylinder block, a main cylinder, a piston, a sub cylinder, an overhead valve, a spike valve, and a part covering the bottom surface of the bevel of the spike valve.
  • the piston reciprocates in the main cylinder.
  • the combustion chamber is formed between the piston and the cylinder head.
  • the combustion chamber is expanded outside the main cylinder.
  • the inner wall surface of the combustion chamber includes a first portion and a second portion.
  • the first portion is a portion of the inner wall surface facing the upper surface of the piston.
  • the second part is a part of the inner wall extended to the outside of the main cylinder.
  • the sub cylinder is disposed outside the main cylinder.
  • a spike valve is installed in the second portion of the inner wall surface.
  • the weir valve has a second drive that drives the stem of the weir valve. When the weir valve opens, gas passes between the weir valve and a second valve seat for the weir valve.
  • the part reciprocates in the sub cylinder, and the part has a cylindrical side surface.
  • the weir valve is located between the second valve seat and the part.
  • Means are provided for bringing the second valve seat and the soot valve into close contact with the component.
  • the combination of the integral formation of the valve and the part and the device for moving the part toward the second valve seat is one of the means, and the part is used as the second valve seat.
  • the installation of the pointing device is another one of the above means.
  • a third spring installed in contact with the component, a pneumatic device installed in contact with the component, a hydraulic device installed in contact with the component, and a second installed in contact with the shaft portion of the soot valve
  • One of the springs is the device that moves the part towards the second valve seat.
  • the third spring installed in contact with the component, the pneumatic device installed in contact with the component, and one of the hydraulic devices installed in contact with the component are components for the second valve seat It is the above device to face and push.
  • the soot valve and the component are integrally driven by the second drive device and the means.
  • a compression ring is installed at a position between the inner wall of the auxiliary cylinder and the cylindrical side surface of the part.
  • the component is positioned in contact with the bottom surface of the soot valve.
  • the overhead valve is disposed on the first portion of the inner wall surface.
  • the overhead valve has a first spring and a drive. When the overhead valve opens, the gas passes between the overhead valve and a first valve seat for the overhead valve.
  • the gas is either one of intake air flowing into the combustion chamber and combustion gas flowing out of the combustion chamber.
  • At least one set of intake and exhaust valves is included in the sum of the overhead valve and the spike valve.
  • the number of sums of the number of overhead valves and the number of flaps is three or more.
  • One end of the auxiliary cylinder is disposed adjacent to the second valve seat.
  • the entire circumference of the portion of the cylindrical side surface of the component adjacent to the soot valve is a straight line connecting the central axis of the main cylinder and the central axis of the sub cylinder and a straight line orthogonal to the central axis of the sub cylinder. It is divided into two half laps.
  • the two half circles are a first half circle whose distance from the central axis of the main cylinder is close and a second half circle whose distance from the central axis of the main cylinder is long.
  • the cylindrical side of the part adjacent to the spike valve is divided into two semi-peripheral surfaces.
  • the two half circumferences are a first half circumference with the first half circumference and a second half circumference with the second half circumference.
  • a portion adjacent to the second valve seat of the auxiliary cylinder is formed facing the second semi-peripheral surface.
  • a fixed wall located outside the combustion chamber extended outside the main cylinder is formed in contact with the inner circumferential surface of the sub cylinder facing the second half circumferential surface.
  • An opening of the sub cylinder is provided near the one end of the sub cylinder. The opening faces the first half circumference.
  • a first gas passage is provided between the second valve seat and the external space of the engine.
  • a second gas passage is provided for short distance communication between the main cylinder internal space and the first gas passage while the spit valve is open, and the opening is in the second gas passage. included.
  • the area of the portion of the cylindrical side surface of the valve cover 7 to which the heat of combustion gas is added is reduced more than the engine shown in Patent Document 3, and the heat loss amount of this engine is reduced. Therefore, the third object is achieved in the second aspect.
  • the configuration of the third aspect of the present invention will be described below only the differences from the first aspect.
  • the stroke length of the piston of the engine of the first aspect and the second aspect is not set smaller than the diameter of the piston.
  • the piston type engine of the third aspect improves the conversion efficiency of combustion gas more than a short-stroke engine. In addition, it improves the decrease in intake efficiency of high-speed rotation of a long stroke engine. As a result, the improvement of the conversion efficiency and the increase of the torque at high speed can be compatible.
  • the third object is achieved.
  • the piston engine of the three aspects of the present invention may be a spark ignition engine or a compression ignition engine, and the spark ignition engine may be a two-stroke or four-stroke engine.
  • the spark plug can be installed at any position on the wall of the combustion chamber.
  • the volume of the combustion chamber is reduced by the volume in which the upper part of the component protrudes into the combustion chamber space of the crucible in contact with the soot valve which is closed in the absence of the component.
  • the combustion chamber of the engine can have a high compression ratio. Therefore, the first object can be achieved.
  • the area of the sum of the intake and exhaust valves of the three modes of the engine is increased compared to an engine in which the overhead valve is provided only inside the main cylinder. Therefore, the amount of intake / exhaust resistance at high speed rotation is reduced. Therefore, the output of the engine of the present invention can be increased.
  • the first embodiment corresponds to the first aspect.
  • the piston type engine shown in FIGS. 1 and 2 has a cylinder head 5, a cylinder block 6, a main cylinder 1, a piston 26, a sub cylinder 4, overhead valves 25 A and 25 B, and a valve 2.
  • the piston 26 reciprocates in the main cylinder 1.
  • the combustion chamber 27 is formed between the cylinder head 5 and the piston 26.
  • the combustion chamber 27 is further expanded to the outside of the main cylinder 1.
  • the inner wall surface of the combustion chamber 27 includes a first portion and a second portion.
  • the first part is the part of the inner wall facing the top of the piston 26.
  • the second part is the part of the inner wall extended to the outside of the main cylinder 1.
  • the combustion chamber 27 can extend both to the right outside the main cylinder 1 and to the left outside the main cylinder 1.
  • the auxiliary cylinder 4 is installed in the cylinder block 6 outside the main cylinder 1.
  • Overhead valves 25A and 25B are located on the first portion facing the top of the piston 26. When the overhead valve 25 opens, gas passes between the overhead valves 25A, 25B and the valve seats for the overhead valves 25A, 25B.
  • the overhead valves 25A and 25B have springs 29A and 29B.
  • the overhead valves 25A and 25B have cams 28A and 28B as a first driving device for lifting the overhead valves 25A and 25B.
  • the overhead valve 25A is selected as the intake valve and the overhead valve 25B is selected as the exhaust valve, then during the intake stroke of the piston 26, the overhead valve 25A is opened by the cam 28A and overhead during the exhaust stroke of the piston 26.
  • the valve 25B is opened by the cam 28B.
  • the cam 28A for the overhead valve 25A and the cam 28B for the overhead valve 25B can be replaced by an electromagnetic device or a hydraulic device.
  • the spike valve 2 is installed at the second portion of the main cylinder 1 which is expanded to the outside.
  • the second part may be provided with a plurality of soot valves 2.
  • the bottom 3 of the valve 2 is the bottom of the umbrella of the valve 2.
  • the outer periphery of the upper surface of the umbrella portion of the spike valve 2 is provided with a surface in close contact with the second valve seat 16 for the spike valve 2 when the spike valve 2 is closed.
  • the spike valve 2 has a cam 30 in contact with the spike valve 2.
  • intake or exhaust gas passes between the soot valve 2 and the second valve seat 16. That is, the spike valve 2 can be used as an intake spike valve or an exhaust spike valve.
  • the spike valve 2 is opened by the cam 30 during the intake stroke of the piston 26.
  • the soot valve 2 is used as an exhaust valve
  • the soot valve 2 is opened by the cam 30 during the exhaust stroke of the piston 26.
  • the second drive that lifts the spike valve 2 includes a cam 30.
  • the cam 30 for the spike valve 2 can be replaced by an electromagnetic or hydraulic device.
  • Three installation examples of the intake valve and the exhaust valve will be described. Three installation examples relate to the overhead valves 25A and 25B and the spike valve 2. Patent Document 3 does not show what is shown in the three installation examples. In three installation examples, the number of sums of the number of overhead valves and the number of flaps is three or more. In the first example, a plurality of exhaust weir valves are installed in the second part, and the weir valves installed in the second part are limited to only the exhaust weir valves. This element is not shown in Patent Document 3. At least one intake head valve is installed in the first part. Therefore, in the first example, the number and the area of the exhaust weir valves installed in the second part can be increased more than the engines of Patent Document 1 and Patent Document 3.
  • the amount of the burned gas passing through the one exhaust valve installed in the second part is reduced more than the exhaust valve of Patent Document 3 and the maximum temperature of the plurality of exhaust valves is descend. Therefore, the knocking resistance of the first example is improved more than that of Patent Document 3.
  • the second example will be described.
  • a plurality of intake soot valves are installed in the second part, and the soot valves installed in the second part are limited to only the intake soot valve.
  • This element is not shown in Patent Document 3.
  • At least one exhaust overhead valve is installed in the first part. Therefore, in the second example, the number and area of the intake valves can be increased as compared with the engines of Patent Document 1 and Patent Document 3.
  • the third example is explained using Fig.3.
  • One or more arbitrary number of overhead valves are installed in the first portion of the inner wall surface of the combustion chamber 27, and all the overhead valves provided in the first portion are the intake valve 33.
  • an exhaust valve 34 is provided in a second portion which is expanded to the outside of the main cylinder 1.
  • the temperature rise of the exhaust soot valve 34 can be limited.
  • the exhaust soot valve 34 does not reduce the filling rate of the intake air. Because of this, this engine can achieve the second purpose completely.
  • the temperature of the intake valve 33 does not rise.
  • the wall surface of the combustion chamber does not have a portion having a higher temperature than the exhaust valve described in the section of the prior art. Therefore, when the piston is highly loaded, a flame retardant layer of the air-fuel mixture is formed along all the wall surfaces of the combustion chamber. As a result, the knocking resistance of the spark ignition engine is improved more than the engines of Patent Documents 1 and 3. Then, the compression ratio of this engine can be increased, and the thermal efficiency of this engine can be improved. Because of this, this engine can achieve the third purpose.
  • a piston engine can be operated if it has a pair of intake and exhaust valves.
  • the valves other than the one pair of intake valve and exhaust valve are the intake valve and the exhaust valve. Operation is possible even if one of the valves is selected.
  • the overhead valves are described as two of 25A and 25B, if the number of sums of the number of overhead valves and the number of flaps is three or more, the number of overhead valves is any number of one or more. I can do things. Also, if the sum of the number of overhead valves and the number of overflow valves is three or more, the setting of the intake valve or the exhaust valve can be changed unlike the above three examples.
  • the piston engine of the first embodiment has a valve cover 7.
  • the valve cover 7 reciprocates in the sub cylinder 4.
  • the valve cover 7 is a component that covers the bottom surface 3 of the spike valve 2.
  • the valve cover 7 is a component whose upper portion projects into the internal space of the combustion chamber 27.
  • the valve cover 7 has a cylindrical side surface, an upper surface and a back surface. The lower portion of the cylindrical side surface faces the inner wall surface of the sub cylinder 4.
  • the valve cover 7 and the spike valve 2 are driven by a cam 30 which lifts the spike valve 2.
  • the cam 30 is the second drive.
  • the extension of the central axis of the stem portion of the spike valve 2 and the central axis of the sub cylinder 4 are set to coincide or approximately parallel.
  • the cam 30 for the spike valve 2 also functions as a drive for lifting the valve cover 7.
  • a space is formed between the valve seat 16 of the spike valve 2 and the upper end 10 of the auxiliary cylinder 4.
  • the upper end 10 faces the space in the combustion chamber 27.
  • a ring groove for the compression ring 9 is provided on the cylindrical side surface of the valve cover 7. The compression ring 9 is installed in this ring groove. This element is not shown in Patent Document 3.
  • the compression ring 9 When the spike valve 2 is closed, the compression ring 9 is pinched between the inner wall of the auxiliary cylinder 4 and the ring groove. Since the compression ring 9 is installed between the inner wall of the sub cylinder 4 and the cylindrical side surface of the valve cover 7 when the spike valve 2 is closed, the space between the valve cover 7 and the inner wall of the sub cylinder 4 is The combustion chamber 27 is sealed by the compression ring 9 so that the combustion gas is not drained from the space in the combustion chamber 27 to the space in the sub cylinder 4 where the valve cover 7 does not exist through the gap. In order to bring the top surface 8 of the valve cover 7 into close contact with the bottom surface 3 of the spike valve 2, a spring 12 for the valve cover 7 is installed in contact with the back surface of the valve cover 7.
  • the spring 12 presses the valve cover 7 against the bottom of the spike valve 2. Therefore, the valve cover 7 and the spike valve 2 are integrally driven by the cam 30 and the spring 12.
  • the spring 12 is one of the means for bringing the second valve seat, the valve 2 and the valve cover 7 into close contact.
  • the spring 12 is a device that pushes the valve cover 7 toward the second valve seat 16.
  • the spring 12 works the same as a valve spring which can be installed in contact with the spike valve 2.
  • the valve spring in contact with the spike valve 2 is not installed in the embodiment shown in FIG. For this reason, the installation of the spring 12 for the valve cover 7 may omit the installation of the spring installed in contact with the soot valve 2. That is, installation of the spring installed in contact with the axial part of the spike valve 2 is not essential.
  • the spring installed in contact with the shaft of the spike valve 2 can be added.
  • combustion gas flows into the ring groove through the gap between the cylindrical side surface of the valve cover 7 and the inner wall of the sub cylinder 4.
  • the inflowing combustion gas flows in one direction.
  • a force in the direction of compressing the spring 12 is applied to the compression ring 9.
  • the combustion gas pushes the valve cover 7. Therefore, the strength of the spring 12 needs to overcome the combustion gas pressure applied to the compression ring 9.
  • the valve cover 7 is not actuated when the spike valve 2 is closed.
  • the valve cover 7 does not move. Therefore, burn-in of the valve cover 7 is unlikely to occur.
  • FIG. 1 the state in which the top surface 8 of the valve cover 7 and the bottom surface 3 of the soot valve 2 are in close contact is displayed as a solid line drawn at the boundary between the valve cover 7 and the soot valve 2.
  • two lead lines are drawn from a solid line showing that both are in close contact with each other.
  • the two leader lines are the leader for code 8 and the leader for code 3.
  • the solid lines represent the top surface 8 of the valve cover 7 and the bottom surface 3 of the valve 2. For this reason, two lead lines are drawn in opposite directions.
  • the size of the top surface 8 of the valve cover 7 and the size of the bottom surface 3 of the soot valve 2 are preferably equal. In this case, no combustion gas pressure acts on the upper surface 8 of the valve cover 7.
  • the combustion gas pressure acts on the top surface 8 of the valve cover 7.
  • the soot valve 2 closes during the combustion stroke of the piston 26.
  • the valve cover 7 is positioned in contact with the bottom surface 3 of the spike valve 2. Then, a large portion of the combustion chamber space expanded outside the main cylinder 1 of the crucible which contacts the bottom surface 3 of the soot valve 2 which is closed in the absence of the valve cover 7 is actually Upper part occupies.
  • the valve cover 7 moves with the spike valve 2.
  • the spike valve 2 is lifted to a maximum, the majority of the valve cover 7 is located in the secondary cylinder 4.
  • the soot valve 2 is open, the combustion chamber 27 facing the upper surface of the biston communicates with the external space of the engine.
  • the soot valve 2 is installed on the wall of the first portion of the combustion chamber 27 expanded to the outside of the main cylinder 1.
  • the number of sums of the number of overhead valves and the number of flaps is three or more. Therefore, the total area of the intake valve and the exhaust valve of the engine of the first embodiment is increased as compared with the conventional example in which the valve is not provided outside the main cylinder.
  • the second to fifth embodiments are alternatives to the elements of the first embodiment.
  • the first object can be achieved.
  • only the differences from the first embodiment are described.
  • the second embodiment will be described.
  • the sub cylinder 4 is mounted on the cylinder head 5.
  • the gas passage in contact with the soot valve 2 is installed in the cylinder block.
  • the valve 2 installed on the outside of the cylinder is a side valve.
  • the third embodiment will be described.
  • a pneumatic or hydraulic device 19 or an electromagnetic or electrical device is used instead of the spring 12, a pneumatic or hydraulic device 19 or an electromagnetic or electrical device is used. These devices press the top surface 8 of the valve cover 7 against the bottom surface of the spike valve 2.
  • These devices and the third spring 12 are devices that push the valve cover 7 toward the valve seat 16.
  • the pressure of the combustion gas is applied to the compression ring 9 to push down the valve cover.
  • This pushing force should not isolate the bottom of the valve cover and the valve.
  • the above-mentioned device including the hydraulic device 19 with a force more than this pushing force causes the valve cover to face the valve seat 16 of the spike valve 2.
  • FIG. 6 A fourth embodiment will be described.
  • the spike valve 2 and the valve cover 7 are integrally formed.
  • a virtual joint surface between the spike valve 2 and the valve cover 7 is indicated by an alternate long and short dash line.
  • the third spring 12 for pushing the valve cover 7 in the case where the third spring 12 for pushing the valve cover 7 is not installed, the second spring 31 in contact with the stem of the spike valve 2 functions as a substitute for the third spring 12.
  • the second spring 31 pulls the valve 2.
  • installation of the spring 12 may be omitted.
  • the installation of the second spring 31 in contact with the stem of the soot valve 2 may be omitted.
  • a ring groove for the compression ring 9 is provided on the inner wall of the auxiliary cylinder 4. And the compression ring 9 is installed in this ring groove.
  • the compression ring 9 In order for the compression ring 9 to seal the combustion gas, the compression ring 9 must be positioned between the cylindrical side surface of the valve cover 7 and the inner wall of the auxiliary cylinder 4 when the soot valve 2 is closed. .
  • a ring groove is not formed on the cylindrical side surface of the valve cover 7. Therefore, in this engine, the force of the combustion gas applied to the compression ring 9 does not push the valve cover 7 downward. Therefore, in the engine shown in FIG. 7, a spring weaker than that of the engine shown in FIG. 1 can be used.
  • the sixth to tenth embodiments described below are added to the first to fifth embodiments.
  • the sixth to tenth embodiments improve the first to fifth embodiments.
  • the sixth to tenth embodiments are not described in Patent Document 1 and Patent Document 3.
  • the eighth to tenth embodiments and the sixth embodiment are not described in Patent Document 2.
  • a sixth embodiment will be described using FIGS. 8 and 9.
  • the sixth embodiment corresponds to the second aspect.
  • One end 10 of the auxiliary cylinder 4 is located adjacent to the second valve seat 16 for the spike valve 2.
  • the portion of the secondary cylinder 4 adjacent to the spike valve 2 may be integrally formed with the portion of the secondary cylinder 4 facing the compression ring 9 or be formed as part of a cylinder head. When the spike valve 2 is opened, the umbrella portion of the spike valve 2 is located inside the sub cylinder 4.
  • the three-sided broken line 39 connecting the central axis 37 of the main cylinder 1 and the central axis of the sub cylinder 4 and the four dotted line 38 orthogonal to the central axis of the sub cylinder 4 The whole circumference of the part adjacent to is divided into two half circumferences.
  • the two half circumferences are a first half circumference which is close to the central axis 37 of the main cylinder 1 and a second half circumference which is distant from the central axis 37 of the main cylinder 1.
  • the cylindrical side surface of the valve cover 7 adjacent to the spike valve 2 is divided into two half circumferential surfaces.
  • the two half circumferences are a first half circumference 40 having the first half circumference and a second half circumference 35 having the second half circumference.
  • a portion facing the second half circumferential surface 35 and adjacent to the second valve seat of the auxiliary cylinder 4 is formed. This portion is depicted in FIG. 9 as a sub-cylinder designated 4.
  • a fixed wall located outside the combustion chamber expanded to the outside of the main cylinder 1 is formed in contact with the inner circumferential surface of the sub cylinder 4 facing the second half circumferential surface 35.
  • the portion adjacent to the spike valve 2 of the sub cylinder 4 is formed integrally with the portion of the sub cylinder 4 facing the compression ring 9, it contacts the outer peripheral surface 36 of the sub cylinder 4 facing the second half circumferential surface 35
  • the fixed wall formed and the secondary cylinder 4 facing the second semi-peripheral surface 35 is a fixed wall located outside the combustion chamber extended to the outside of the main cylinder 1.
  • An opening 18 of the sub cylinder 4 is provided near one end 10 of the sub cylinder 4.
  • the opening 18 faces the first half circumferential surface 40.
  • a first gas passage 11 is provided between the second valve seat 16 for the spike valve 2 and the external space of the engine. While the soot valve 2 is open, a second gas passage 21 is provided to connect the space in the main cylinder 1 with the first gas passage 11 in a short distance.
  • An opening 18 is included in the second gas passage 21. In FIG. 9, the opening 18 is indicated by a double dotted line.
  • the second gas passage 21 is included in a combustion chamber space surrounded by the second portion. In the second part, which is extended to the outside of the main cylinder 1, a plurality of pairs of valve covers 7, sub-cylinders 4 and openings 18 can be installed.
  • the volume of the combustion chamber expanded to the outside of the main cylinder 1 decreases and the compression ratio becomes higher than the engines shown in Patent Document 1 and Patent Document 3.
  • the heat of the combustion gas is applied to a portion of the upper cylindrical side surface of the valve cover 7.
  • the pressure of the combustion gas is applied to a portion adjacent to the sluice valve 2 of the cylindrical side surface of the valve cover 7. .
  • the second semi-peripheral surface 35 is formed on a part of the sub cylinder 4 having the outer peripheral surface 36 It is pressed and stuck.
  • a portion of the sub cylinder 4 having the outer circumferential surface 36 faces the second half circumferential surface 35.
  • No combustion gas can flow in between the closely attached surfaces.
  • the heat of the combustion gas can not flow into the closely attached surfaces.
  • the area of the portion to which the heat of the combustion gas is added to the cylindrical side surface of the valve cover 7 is reduced compared to the engine shown in Patent Document 3, and the heat loss amount of this engine is reduced. As the contact area is larger, the temperature of the cylindrical side surface is lowered. Therefore, the fuel efficiency is improved and the knocking resistance is also improved as compared with the engine shown in Patent Document 3.
  • a seventh embodiment will be described.
  • the seventh embodiment corresponds to the third aspect.
  • the stroke length of the piston of the engine shown in the first to sixth embodiments is not set smaller than the diameter of the piston. That is, the stroke length of the piston of the engine is made substantially equal to or larger than the diameter of the main piston. This improves the conversion efficiency of the combustion gas more than a short-stroke engine. In addition, it improves the decrease in intake efficiency of high-speed rotation of a long stroke engine. As a result, the improvement of the conversion efficiency and the increase of the torque at high speed can be compatible. Therefore, the third object can be achieved.
  • FIG. 10 An eighth embodiment using FIG. 10 will be described.
  • the portion of the valve cover 7 adjacent to the soot valve 2 is heated by the combustion gas during the combustion stroke.
  • high heat in the combustion chamber causes knocking.
  • high heat in the combustion chamber reduces the filling rate of the intake air.
  • an injection valve 41 is added to the engine shown in the first to seventh embodiments.
  • the injection valve 41 sprays oil toward the back surface of the portion of the valve cover 7 adjacent to the spike valve 2.
  • the subring 12 is installed in contact with the back surface. Then, the temperature of the portion of the cylindrical side surface of the valve cover 7 adjacent to the check valve 2 is lowered. Then, knocking is less likely to occur. Then, the compression ratio can be set high, and the thermal efficiency is improved. Thus, the third objective is achieved. Also, the filling rate of the intake does not decrease.
  • the ninth embodiment will be described.
  • the surface of the valve cover 7 in contact with the spike valve 2 is formed in a convex curved surface, and the surface in contact with the valve cover 7 of the spike valve 2 is formed in a concave curved surface.
  • the curvatures of the two surfaces coincide.
  • the portion of the valve cover 7 adjacent to the spike valve 2 is pressed against the piston 26.
  • the upper portion adjacent to the spike valve 2 of the valve cover 7 is deformed.
  • the bottom 3 of the spike valve 2 does not deform.
  • no gap is generated between the above two curved surfaces.
  • the state where the above two curved surfaces are in close contact is displayed as a solid line.
  • the two curved surfaces in FIG. 11 do not separate.
  • the lubrication of the compression ring 9 installed near the combustion chamber is insufficient.
  • This problem is solved by adding the following settings.
  • the upper compression ring 23 installed near the combustion chamber 27 is installed on the inner wall of the sub cylinder 4, and the lower compression ring 24 is installed on the cylindrical side surface of the valve cover 7.
  • An upper compression ring 23 is disposed between the lower compression ring 24 and the combustion chamber 27.
  • the upper end of the lower compression ring 24 is located adjacent to the lower end of the upper compression ring 23 when the spike valve 2 is closed.
  • a lower compression ring 24 is installed between the oil ring 22 and the upper compression ring 23.
  • An oil ring 22 is mounted on the cylindrical side of the part. As the valve cover 7 moves, the lower compression ring 24 also moves.
  • the moving lower compression ring 24 moves the oil removed by the oil ring 22 to the lower end of the upper compression ring 23. Then, the upper compression ring 23 is lubricated.
  • An oil spout is provided between the position of the lower compression ring 24 when the cam drives the valve cover 7 to the maximum and the position of the oil ring 22 when the spike valve 2 is closed. Then, the amount of oil which the lower compression ring 24 moves increases.
  • the figure explaining a first embodiment The figure explaining a first embodiment.
  • Figure when the valve opens. The figure explaining a first embodiment.
  • the alternative figure of the element of 1st embodiment. The alternative figure of the element of 1st embodiment.
  • the alternative figure of the element of 1st embodiment. The alternative figure of the element of 1st embodiment.
  • the figure explaining a second embodiment. The figure explaining a second embodiment.
  • Diagram of an example of improving the first to fifth embodiments Diagram of an example of improving the first to fifth embodiments
  • Diagram of an example of improving the first to fifth embodiments Diagram of an example of improving the first to fifth embodiments
  • Diagram of an example of improving the first to fifth embodiments Diagram of an example of improving the first to fifth embodiments
  • Power and torque diagrams for the 3RZ-FE and 22R-E engines The figure of the combustion chamber of Japanese patent publication number 2000-282814.
  • valve Cover 8 Upper surface of valve cover facing space in combustion chamber 9: Compression ring 10: Upper end of sub cylinder 11: Gas passage 12: Spring 13: Valve cover Portion 14 of the upper surface not in contact with the bottom surface of the bottom valve ⁇ ⁇ ⁇ Side valve 15 ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ combustion chamber space 16 with a portion where the valve cover protrudes from the combustion chamber space expanded to the outside of the main cylinder Valve seat 17 of the spill valve ⁇ Exhaust valve 18
  • the first semi-peripheral surface 41 of the cylindrical side surface of the valve cover having a first half circumference at a short distance from the central axis of the main cylinder ⁇ ⁇ ⁇
  • the injection valve 108 that sprays oil on the back surface of the portion of the valve cover adjacent to the spike valve ⁇ ⁇ ⁇
  • the first compression ring 113 installed in the auxiliary cylinder of the conventional example ⁇ ⁇ ⁇

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)

Abstract

Le taux de compression d'un moteur qui comprend une soupape champignon fournie à une partie de chambre de combustion déployée vers l'extérieur d'un cylindre principal est augmenté, et la température d'une soupape champignon d'échappement est rendue faible. Dans un moteur à piston, un couvercle de soupape (7) comprend une surface latérale tubulaire et une surface supérieure (8). Un anneau de compression (9) est fourni soit à la surface latérale tubulaire, soit à la paroi interne d'un sous-cylindre (4). Le moteur à piston est doté d'un moyen permettant d'amener la surface de fond (3) d'une soupape champignon (2) et la surface supérieure (8) du couvercle de soupape (7) en contact étroit l'une avec l'autre. La majeure partie de l'espace situé à l'intérieur de la chambre de combustion en regard de la surface de fond (3) est occupée par la partie supérieure du couvercle de soupape (7) lorsque la soupape champignon (2) est fermée. Lorsque la soupape champignon (2) est soulevée, le couvercle de soupape (7) se déplace avec la soupape champignon (2). La combinaison des soupapes en tête (25A, 25B) et des soupapes champignon (2) comprend au moins un ensemble d'une soupape d'aspiration et d'une soupape d'échappement, et la somme du nombre des soupapes en tête (25A, 25B) et du nombre des soupapes champignon (2) est de trois ou plus.
PCT/JP2010/050446 2009-01-20 2010-01-17 Moteur à piston doté d'une partie permettant de recouvrir une surface de fond d'une partie de couvercle de soupape champignon WO2010084831A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201080003207.4A CN102216586A (zh) 2009-10-21 2010-01-17 具有覆盖菌形气门的伞形部的底面的部件的活塞式发动机

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JP2009-010427 2009-01-20
JP2009010427 2009-01-20
JP2009119346 2009-05-16
JP2009-119346 2009-05-16
JP2009241923A JP4558090B1 (ja) 2009-01-20 2009-10-21 茸弁の傘部の底面を覆う部品を持つピストン式エンジン
JP2009-241923 2009-10-21

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Cited By (1)

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CN108661785A (zh) * 2018-07-26 2018-10-16 谭建文 无曲轴旋转式阿特金森循环发动机

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Publication number Priority date Publication date Assignee Title
JP4848474B1 (ja) * 2011-05-08 2011-12-28 康仁 矢尾板 火花点火式４サイクルエンジン
WO2013098905A1 (fr) * 2011-12-25 2013-07-04 Yaoita Yasuhito Moteur à quatre temps à allumage par étincelle

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Publication number Priority date Publication date Assignee Title
JPS6228006U (fr) * 1985-08-02 1987-02-20
JPH0932520A (ja) * 1995-07-05 1997-02-04 Electrolux:Ab 燃焼ピストンエンジンの圧縮逃がし弁
JP2001355470A (ja) * 2000-06-15 2001-12-26 Honda Motor Co Ltd 内燃機関
JP4230529B1 (ja) * 2008-05-04 2009-02-25 康仁 矢尾板 摺動する弁を持つエンジン

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IN185712B (fr) * 1991-11-02 2001-04-14 Univ Coventry
AUPO904197A0 (en) * 1997-09-09 1997-10-02 Dixon, Michael Patrick Internal combusion engine

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Publication number Priority date Publication date Assignee Title
JPS6228006U (fr) * 1985-08-02 1987-02-20
JPH0932520A (ja) * 1995-07-05 1997-02-04 Electrolux:Ab 燃焼ピストンエンジンの圧縮逃がし弁
JP2001355470A (ja) * 2000-06-15 2001-12-26 Honda Motor Co Ltd 内燃機関
JP4230529B1 (ja) * 2008-05-04 2009-02-25 康仁 矢尾板 摺動する弁を持つエンジン

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108661785A (zh) * 2018-07-26 2018-10-16 谭建文 无曲轴旋转式阿特金森循环发动机
CN108661785B (zh) * 2018-07-26 2024-01-23 谭建文 无曲轴旋转式阿特金森循环发动机

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JP2011001948A (ja) 2011-01-06

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