TW445342B - Valve driving apparatus for internal combustion engine - Google Patents

Abstract

This invention relates to a valve driving apparatus using a direct driving type valve lifter which is disposed between a cam formed at a cam shaft and a poppet valve which is provided in a path formed at the cylinder head of an internal combustion engine and moves to the axial direction of the valve to open and close the path, comprising a guide hole formed at the cylinder head; and a direct driving type valve lifter having a tappet portion which is brought in contact with the cam and pressed by the cam, and a guide portion having one end portion coupled to the tappet portion and housed within the guide hole so as to slide freely therein to the axial direction of the poppet valve in an interlocked manner as a pushing operation of the tappet portion by the cam, wherein the diameter of the guide portion (104) is formed to be smaller than the diameter of the tappet portion.

Description

4. 4 4 ^ 34-2, V. Description of the invention CO background of the invention 1. The invention of the invention The present invention relates to a valve driving device for a closed internal combustion engine, which has a good retention rate. 2. Relevant devices are disclosed here, such as devices in Japan. The cylinder head of this direct-fired engine slides inside. The valve pushes the guide along. So this closure has this valve pusher piece and plate, so that the cam can be touched under the execution range, and let the pusher, for example, to increase the valve opening and the valve opening surface can ensure that the valve has a full range. Regarding a valve driving device, the port . The special connection-driven valve lifting capacity is 'to change the air port or exhaust gas'. It uses a sufficient valve lift to drive the valve to open and close. The present invention relates to two lifters, not only the mini I, but also the skill of the internal combustion engine. Describe a publication case where a lifter using a direct drive type includes contact; and a patent unexamined connection of a cam lifter over a drive type valve to a cylinder head moving valve and a protruding air intake port or cam of the valve The shape of the cam wire can be obtained by the improved internal combustion area. Because of the product, the valve drive of the lifter that is enough to push up is equipped with Hei 1 0-3 31 7 09 ^ 1: a pusher piece, which can be located between the inner and the guide, between the steam # valve, when The cam rotating member is moved in the axial direction by the protruding end of the cam so as to open and exhaust the opening. Sexual contact at end contact. The load is calculated to let the putter touch. The output of the machine is designed to increase the required rods. When the cam is a kind of 'the putter is made into a circular flat and does not deviate from the diameter of the pusher member and the protruding end of the cam. To increase the suction, you need The lifting amount of the valve should be adjusted to the diameter M Η .e 4 4 5 3 4 2 t ---------- 1 V. Description of the invention (2 ^ '---- In order to ensure that the valve has a sufficient lifting amount, the diameter of the pusher member needs to be set according to $. However, the diameter of the pusher member is set too large, then the f of the guide member becomes larger, and the size of the valve lifter becomes larger. Conversely, there are no mechanisms and structures near the internal combustion engine steam, so that the valve lifter is placed and therefore the maximum size of the valve lifter is limited, so when the valve lifter two is limited to space, it is necessary to ensure sufficient There is a problem with the amount of valve lift. This problem is more serious in small-sized internal combustion engines. When the size of the valve lifter is only made larger, the inertia of the valve drive system becomes larger, so it is necessary to ensure that the engine reaches the desired I ’m afraid that the required performance will be difficult. When the inertia weight of the valve drive system increases, the bomb The elastic force of the system is closed by acting on the valve. As a result, the contact pressure between the push rod member and the cam becomes higher, which causes the wear of the push rod member and the cam. Traditional valve driving devices also have the performance of lubricating oil. Problem. This problem will be explained with Figures 25 and 26. Figures 25 and 26 show the schematic diagram of the structure of a direct drive type conventional valve drive device. Figure 25 shows that the valve lifter does not have The state of being depressed, @ 第 26 shows the state of the 阙 lifter being depressed. As in these figures, the cam 902 is placed above the cylinder head 901 of the internal combustion engine, and the guide hole 903 is attached to the cylinder head 901. Inside. The cylindrical part (guide) of the cylindrical valve lifter 904 is located in the guide hole 903 and slides in the hole. The four wheels 90 2 are adjacent to the upper surface of the valve lifter 904. ). Room 905 (intake room or exhaust valve) is placed opposite the cam 902 through a valve lifter 904.

Page 5 V. Description of the invention (3) The cam 902 is rotated to depress the valve lifter 904, and the valve lifter moves in the hole 903 to repeatedly open or close the valve 905. An oil storage tank 906 for storing lubrication 907 is above the guide hole 903, so when the valve lifter 904 is depressed by the cam 902, both the push rod member and the protruding end of the cam 902 are immersed in the oil storage tank. 9 0 6 in the lubricating oil 9 07. In most internal combustion engines, a predetermined gap has been defined between the guide hole 903 and the valve lifter 904, so the valve lifter 904 is operable even at low temperatures. Therefore, the lubricating oil 90 in the oil storage tank 906 enters the gap due to the rotation of the cam 902, the vertical movement of the valve lifter 90 4 and the advancement of the lubricating oil 907 itself, so the corresponding part can be lubricated Serving. ~ & As mentioned above, the protruding end of the cam 9 0 2 is in linear contact with the valve lifting protrusion 92. The pushing and pushing member 7 is within the range of the diameter of the protruding member of the willow 02 and the contact portion of the pushing member. The 'movement' therefore the cam 902 applies a load to the two-position // wide paste lifter when reciprocating, causing 阙 幵 Is 9 0 4 to be applied to the opposite force distance. Therefore, when the lubricating oil 90 7 is at a high temperature, the hoist lifter 904 is washed. The gap between ㈣ becomes larger and the viscosity of the lubricating oil becomes lower. Therefore, the oil film that does not connect to the continuous holes exists in the gap and generates noise, and the friction in the gap becomes larger. When the anti-lubricating oil 907 is at a low temperature, the clearance between the valve lifter _ and the guide hole 903 = the gap becomes smaller. Therefore, it is difficult for the lubricant 90 7 to follow the guide hole = to increase the friction. As a result, the output efficiency and combustion of the internal combustion engine: becomes worse, and the wear of the valve lifter 904 and the like may occur. There is also in most cases :: the shot 'cylinder head is made of inscription' and the intermediate lifter is made of iron. As mentioned above, the 445342 1 has been defined between the guide hole 903 and the valve lifter 904. Fifth, the description of the invention (4), the valve lifter 904 can be operated even at extremely low temperatures. . At high temperatures, the gap between the valve lifter 904 and the guide hole 903 becomes large. Therefore, when the above-mentioned force distance is applied to the valve lifter 904, the valve lifter 904 is opposed to the guide hole. 903 will tilt to a large angle. On the other hand, since the pusher member of the valve lifter is made into a flat plate, the outer section of the pusher member has high strength, so the pusher member is difficult to deform. As a result, when the amount of lifting is maximum, the shape of the valve lifter 904 is greatly changed, and when the valve lifter 904 reaches the inside of the guide hole, the oil film in the gap is pushed out. Metallic sound. In addition, as the degree of friction and wear increases, the output efficiency and fuel cost of the internal combustion engine will deteriorate. Internal combustion engine problems with moving valve lifters. This kind of valve driving device uses a straightforward valve and can rotate efficiently in a limited space. According to the present invention, between the valve and the poppet valve, the lifter is widened and moved to the axial direction of the valve to open a guide hole. The steam red cap lifter includes a push rod member and a guide member, one end of which In the hole of the rod, the cam is used as the internal lock of the push rod on the shaft of the poppet valve. The present invention is to solve the above-mentioned problems in the use of a direct valve drive device. The valve lifter is not only mini and light enough to have a sufficient valve lift amount to improve the damage. The moving device is placed on the camshaft, the cam is on the passage of the cylinder head of the internal combustion engine, and the passage is closed. The valve driving device includes an upper part; and a direct drive type valve lifter, the cam is contacted and depressed by the cam, and 2 phases are connected, and the guide is located at the guide pusher so as to slide freely in the hole in ten .

Page 7 «445342 V. Description of the invention (5)-According to the arranged valve driving device, because a pusher member with this diameter can make it reach the required valve lift amount, and the diameter of the guide can be made Very small 'so the valve lifter can be made mini and lightweight. As a result, it is possible to maintain high output efficiency and reduce the space required for valve-related components near the cylinder head. Also, because the valve-related components can be placed in a small *, the degree of freedom in the placement of other components can be improved. And because the ^ ^ starter is mini and lightweight ’, the valve drive can handle the engine ’s steam and pro

The lift valve driven by the invented valve driving device can be placed on the rolling passage of the engine, so it is possible to increase the intake air volume by using a mini and lightweight device, so that the operating efficiency of the engine can be improved. 1 I When it is above the air intake cover, the valve drive is installed on the cylinder. Because the valve does not hold one of the approaches, when the lifter is equipped with two lifters, the lifter has two openings. The combustion chamber of the internal combustion engine, and the other side opened to the gas iris, which has such an air intake channel, uses a valve to raise and cry and is restricted to its position. However, according to the invention f, such a limitation is removed and a sufficient valve lift amount can be maintained. In the case of f or more poppet valves, ‘will be placed at each valve of the engine’ to be opened and closed by the valve lifter, and the number of lifters is limited to its position 1. The valve driving device of the present invention can eliminate such restrictions and raise the amount. "Yaneng When using the valve driving device of the present invention, the cylinder head bolt has a wider space. Even more advantageous is that, even in the case of cylinder head bolts requiring the main valve lifter, the valve lifter can still be placed inclined to the engine ==

Page 8 Fifth, the axis of the invention description (6) 'is fixed without disturbing the valve lifter.

The cylinder head bolt can be a valve driving device according to the present invention. The guide hole is at its open end and there is an oil storage tank to store the lubricating oil. The diameter of the push rod member is at least more than the straight of the guide member. The peripheral surface of the guide protrudes from the diameter direction of the f guide. According to this arrangement, when the valve lifter is raised, the protruding end of the pusher can move in the oil storage tank, so the valve lifter can be made compact and lightweight. In addition, due to the movement of the protruding end, the lubricating oil in the oil storage tank is forced to be sent to the needed part, so the lubricating oil can be actively supplied.

Go to the corresponding part of the valve lifter. As a result, because the friction becomes smaller, the voice caused by the stroke operation can be reduced when the valve lifter changes its state, and the degree of wear caused by the stroke operation can be reduced.

The rate and fuel consumption can be improved, and the durability and reliability of the engine will be improved. According to the valve driving device of the present invention, it is better to maintain a gap between the outer surface of the oil storage tank and the end of the push rod member. So the lubricant can splash out of the gap. Therefore, when the valve lifter is depressed, the lubricating oil is forced to the guide and the guide hole next to the bottom surface of the push rod, and the lubricating oil is eliminated from the gap. The upper surface of the member. When the gap is arranged in this way, the direction of the width of the gap is perpendicular to the axis of the center of rotation of the cam, and the periphery of this width is greater than the width of the rest, then the lubricant can be actively splashed on the side of the cam . The technical advantages like this can also be obtained in cases where only a part of the gap faces in a direction perpendicular to the axis of the center of rotation of the cam and its periphery

Page 9 r 445342 V. Description of the invention (7) Edge. Similar technical advantages can also be obtained in the case where the valve lifter is placed obliquely with respect to the upright direction, but the direction opposite is perpendicular to the axis of the center of rotation of the cam, and only a part of the gap faces two The downward direction among these directions is perpendicular to the axis of the center of rotation of the cam and its periphery. According to the valve driving device of the present invention having the above-mentioned oil storage tank, when the diameter of the push rod member is smaller than the diameter of the round end of the bottom of the cam, the spilled lubricating oil will be introduced to the cam.

According to the present invention, a valve driving device using a direct drive type valve lifter is preferably provided with an elastic deformation-promoting end when the guide is located in the guide hole to cause the guide to be elastically deformed. With this arrangement, when the valve lifter changes its state during the ascending operation, the guide member can be elastically deformed. Therefore, when the valve lifter changes its state, the noise caused by the stroke operation will be suppressed, and the increase of friction can be prevented. The durability of the valve lifter will be improved, and the output efficiency and fuel consumption of the engine will be further improved. Preferably, the elastic deformation-promoting end is on the guide, near the boundary between the push rod member and the guide, so that the guide can easily deform elastically along the guide hole when the valve lifter changes its state. .

It is also preferable that the elastic deformation-promoting end near the boundary between the pusher member and the guide member is a groove, and the groove is on the outer circumference of the guide member. In this example, because the groove can be used as a recess, it can perform grinding on the bottom surface of the pusher member and the circumference outside the guide hole, so that the valve lifter can be easily operated. Schematic illustration

Page 10 I 445342 V. Description of the invention (8) Figure 1 is a front view of the structure of the valve driving device according to the first embodiment of the present invention. Fig. 2 is a front view of the main part of the internal combustion engine, which illustrates the valve driving device shown in Fig. 1; Fig. 3 is a plan view of the main part of Fig. 2, viewed from the axial direction of the cylinder of the internal combustion engine. Fig. 4 is a schematic front view showing the structure of the valve driving device according to the second embodiment of the present invention. Fig. 5 is a schematic front view showing the structure of a valve driving device according to a second embodiment of the present invention. Fig. 6 is a schematic front view showing the structure of a valve driving device according to a third embodiment of the present invention. Fig. 7 is a schematic front view showing the structure of a valve driving device according to a fourth embodiment of the present invention. Fig. 8 is a side view showing the structure of a valve driving device according to a fourth embodiment of the present invention. Fig. 9 is an unexpected moon view ', which does not show the structure of the valve driving device according to the fourth embodiment of the present invention. Fig. 10 is a side view showing the structure of a valve driving device according to a fourth embodiment of the present invention. Fig. 11 is a diagram of a valve driving device viewed from a cross-section line VI I I-V I I on Figs. 7 and 9. Fig. 12 is a front view showing the structure of a valve driving device according to a fifth embodiment of the present invention.

Page 11 V. Description of the invention (9) FIG. 13 is a front view showing the structure of a valve driving device according to a fifth embodiment of the present invention. FIG. 14 is a diagram of the valve driving device viewed from a cross-sectional line X I -XI on FIG. 12. Fig. 15 is a front view showing the structure of a valve driving device according to a sixth embodiment of the present invention. Figure i6 is a front view showing the structure of a valve driving device according to a sixth embodiment of the present invention. Fig. 17 is a diagram of the valve driving device viewed from a section line XIV-XIV in Fig. 15. Fig. 18 is a front view showing the structure of a valve driving device according to a seventh embodiment of the present invention. Fig. 19 shows a diagram of a valve driving device along the lines XV and XV I in Fig. 8. Fig. 20 is a front view showing the structure of a valve driving device according to an eighth embodiment of the present invention. Fig. 21 is a front view showing the structure of a valve driving device according to an eighth embodiment of the present invention. Fig. 22 shows a diagram of the valve driving device along the line 11b and I in Fig. 21. Fig. 23 is a front view showing the structure of a valve driving device according to an eighth embodiment of the present invention. Fig. 24 shows a diagram of the valve driving device along the line V-V in Fig. 23.

Page 12 4 453 4 2 V. Description of the invention (10)

Fig. 25 shows the front view of the structure of a conventional valve drive device. Fig. 26 shows the front view of the structure of a conventional valve drive device. Detailed description of the preferred embodiment. The diagram is explained in more detail. A valve driving device according to a first embodiment of the present invention will be described with reference to Figs. Referring to FIG. 1 ', a valve lifter 101 includes a push rod member 103 which stands in contact with a cam 102 positioned above a cylinder head 111 of an internal combustion engine. The portion where the pusher member 丨 M contacts the protruding end of the cam 102 is made into a substantially flat circular plate. The protruding end of the cam 102 and the pusher member 103 are in linear contact. The valve device includes a hollow cylindrical guide member 104 connected under the push rod member 03. The guide 104 can slide in the guide hole 123 of the steam red cover.导 肖 件 104 之 直 # Γ is set to be smaller than the push piece! "The diameter is according to the above structure, the diameter of the push rod piece〗 〇3 = the required lifting amount of the lifter 此, that is, the valve lifter core = value: the reverse roll flow ratio of the predetermined value T and the guide The diameter of 104 is made smaller, providing mini and light weight that can be made. In other words, it is possible to push the part 103 so that the space occupied by the vicinity of the lifting plate π can be obtained. There are also m pieces that can be placed in Xiaokong Anjin: valve-related components "^ he ', once the freedom of being placed by a woman can be

Page 13 445342 V. Description of the invention (π) The favorable space is improved. And because the valve lifter i 〇 1 is a mini 1 lightweight, the valve drive device can adapt to the high-speed operation of the internal combustion engine. The tip portion of the shaft of the Tisch valve (herein referred to as the valve only) 105 is placed in the guide 104 of the wide lifter 101 so as to be close to the bottom surface of the push rod member 103 and the valve 105 is Actuate upwards with a spring not shown in the figure. That is, the valve lifter 101 is placed between the cam 102 and the valve 105. The protruding end of the cam 102 is brought into contact with the pusher member part 103 by the rotation of the cam 102, so as to press down the valve lifter 101, so the valve 105 and the valve lifter 10 are pressed down together. The valve 105 is opened by resisting the force of the spring. Since the valve lifter is fascinating and lightweight, it makes the inertia load of the valve drive system small, so it is not necessary to increase the spring force of the spring, so it is difficult for the cam 102 and the push rod member 103 to wear. The internal combustion engine having the valve driving device according to the first embodiment will be described with reference to Figs. 2 and 3. As shown in Fig. 2, the cylinder block 1 12 of the internal combustion engine is equipped with the cylinder 1 1 3. The piston 11 4 is placed in the cylinder 11 3 so as to make a reciprocating movement therein. A concave groove 114 & is formed on the top surface of the piston 114, and a reverse flow is generated in the groove 114a, so that most of the air sucked into the cylinder 3 can flow through it. An intake valve seat u 5 and an exhaust valve seat i 6 are both placed in the combustion chamber 110 of the cylinder 11 3. The intake valve seat 丨 5 is opened and closed by an intake valve 11 7 (valve 1 0 5), and the exhaust valve seat 丨 6 is opened and closed by an exhaust valve 11 8 (valve 1 0 5) shut down. The cylinder block 1 12 is joined together with the cylinder head 丨 09 by the head bolt 丨 09. The valve lifter 101 is placed on the axis of the intake valve 117 inclined in the cylinder head. The guide 104 is slidably supported on the cylinder head U1. The intake valve 117 (or exhaust valve 118) is placed in the valve lifter 101, so that the positioner

Page 14 Technology 445342 V. Description of the Invention (12) (retainer) 119 and spring 120 are driven to close the intake valve 11? (Or exhaust valve 1 1 8). Each of the intake valve 7 and the exhaust valve 8 on the cylinder 113 is at a predetermined angle with the axis on the cylinder 113. The angle of the intake valve 117 may be the same as or different from the angle of the exhaust valve 118. The valve lifter 101 is placed so that the diameter r of the guide member 04 (picture 1) is smaller than the diameter r of the pusher member 103 (picture 1), and the valve lifter 101 is set. In a tilted way. Therefore, the space on the plane can be arbitrarily maintained, and the degree of freedom of the angle of the intake valve 118 and the exhaust valve 118 can be increased. As a typical example of the exhaust valve 11 8 in Fig. 2, a thin gasket 1 3 丨 can be placed between the valve lifter 10 and the exhaust valve 11 8 (or the intake valve 11 7). The cylinder head 1 11 is provided with an intake port 1 21 ′ so as to communicate with the intake valve seat 1 丨 5 along or perpendicular to the axis of the cylinder 3, and is also provided with an exhaust port 丨 22 and an exhaust valve seat 1 1 6 Connected. Because the intake port 1 2 1 is along or perpendicular to the axis of the cylinder 'and the intake valve 1 1 7 is at an angle with the axis of the cylinder, the air sucked in by the intake port 1 21 can flow down to the cylinder 丨 3 Inside. Therefore, the groove 11 4a on the piston 4 can generate a reverse rolling flow, so that most of the air sucked into the cylinder 3 can flow through it. The fuel is directly injected into the combustion chamber 丨 i 〇, and the stratified combustion can be performed due to the reverse tumble flow of the intake air. As shown in Fig. 3, "Placement of the push rod member 103 of the valve lifter 10m and the cap bolt 1009" Seen from the plane of the bolt, the diameter of the flat bearing surface of the cap bolt i〇9 (1 and the inlet valve 1 1 7 (or the exhaust valve) 8), the push rod member having a diameter r is extended axially and the virtual column shape (virtual coluranar shaPe) obtained can be overlapped. Considering the axis of the bolt 丨 〇9, when the lifting amount is 0, the cover bolt 109 is not heavier than the push rod part 〇3

Page 15: ϊ 445 3 4 2 I five, send 5 instructions (i3) stack. That is, the following relationship needs to be satisfied: P + R > p-d P is the distance between the bolts 109, and P is the distance between the putter parts 103. Because the placement of the valve lifter 101 is inclined to the axis of the cylinder 113, viewed from the plane of the bolt flat bearing surface, even if the diameter d of the bolt flat bearing surface of the cover bolt 109 and the virtual column overlap, The cover bolt 109 can still be fixed without interfering with the valve lifter 101. "Also seen from the plane of the bolt flat bearing surface, the diameter d of the bolt flat bearing surface of the cover bolt 109 and the virtual column If the shapes can overlap, the distance p between the cover bolts 109 can be made smaller, and even if the displacement of the internal combustion engine is small, there can still be enough valve lift (large lift) to ensure high engine performance. . In the above-mentioned first embodiment, the case where the present invention is applied to this type of internal combustion engine has been described, that is, the valve lifter 101 is inclined to the axis of the cylinder 113 (that is, the opposite direction is relative to the upright direction. The axis is perpendicular to the center of rotation of the cam), and the fuel is directly injected into the combustion chamber 110. However, this invention is not limited to the structure of the first embodiment, but may be applied to other types of internal combustion engines. More specifically, this invention can be applied to an internal combustion engine of the type in which the valve lifter 〇1 is placed upright, that is, parallel to the axis of the cylinder 113, or the valve lifter 010 in the cam 102 When the pusher is partially depressed, the air-fuel mixture is introduced into the combustion chamber 110. Moreover, the pitch P of the valve lifter 101 and the pitch p of the cover bolt 10 9 are not limited to the above examples, but viewed from the plane of the bolt flat bearing surface, when the bolt flat bearing surface of the cover bolt 109 is The diameter d and the virtual column do not overlap, and other relational expressions are still applicable. The valve lifter 101 is a cam 102 placed on a camshaft and the steam of an internal combustion engine

Page 16 f; 4 4 b 3 4 2 V. Description of the invention (14) Between the intake valve 117 (or exhaust valve 118) of the intake port 121 (or exhaust port 122) on the iris 111, and Move along the axis of the valve m (or valve 118) to open and close the air inlet 121 (or the air outlet 122). The valve driving device using the valve lifter 101 is equipped with a guide hole 1 2 3 on the cylinder head 111, and the direct drive type valve lifter 101 includes a push rod part 10 and a push rod part It is in contact with the cam 102 and is pressed down by the cam 102; and the guide member 104 is connected to one end of the push rod member 103 and is located in the guide hole 123 to facilitate the pressing operation of the cam as a push rod member It moves inside the hole along the axis of the air intake 117 (or the exhaust valve 118) in an interlocking manner. And the diameter r of the guide member 104 is made smaller than the diameter R of the pusher member portion 103. According to the above-mentioned structure, the diameter R of the push rod part 103 is set to ensure the required lifting amount 'of the valve lifter 10 to obtain a predetermined value or a roll-over flow ratio that is greater than the predetermined value and Required flow. Also, because the diameter of the guide 104 is made smaller, the valve lifter 101 can be made compact and lightweight. Therefore, reducing the space occupied by the valve-related components near the cylinder head 111 makes it possible to maintain high engine performance. And because the components related to the wide can be placed in a small space, the freedom of the other components can be improved. And because the valve lifter 101 is mini and lightweight, the intermediate displacement device can adapt to the high-speed operation of the internal combustion engine. ~ Because the valve lifter 1 0 1 is inclined to the axis of the cylinder 11 3, even if the pitch p of the flat bearing surface of the screw 109 is made smaller than the width of the push rod 〖〇3, the wide production "(P + R ), And the bolts 10 and 9 can still be 'fixed and held without disturbing the putter. Also because of the placement of the intake valve 11 17 and the axis, line ^ ^ angle & degree' of the cylinder 11 3 The present invention can be applied to a type of gas having an upright air inlet 121.

445342 Five 'Invention (15) Internal combustion engine' in order to generate a tumble flow in the combustion chamber 丨 丨 〇, and most of the month will flow through its air intake 'and the fuel directly into the combustion chamber 1 1 Q Inside. It is not that the internal combustion engine does not need the large lifting amount of the valve lifter 101, but that the lifter can be made smaller and lighter without changing the lifting amount. A valve driving device according to a second embodiment of the present invention will be described with reference to Figs. 4 and 5. Fig. 4 shows a state where the valve lifter is not depressed, and Fig. 5 shows a state where the valve lifter is depressed. Referring to these drawings, the cam 212 is placed on the cylinder head 211 of the internal combustion engine, and the cylinder end 211 has a guide hole 213. The cylindrical guide 21 5 of the valve lifter 214 is inside the guide hole 21 3 and can slide in the hole. The pusher member 216 is above the guide member 215. The pusher member 216 protrudes from the outer peripheral surface of the guide member 215 to the diameter direction of the guide member ′ to form a protruding end 230. The upper part of the pusher member 2 1 6 and the guide member 21 5 are connected to form an umbrella shape. The pusher member 2 1 6 is formed into a substantially flat circular portion to contact the protruding end of the cam 21 2. The cam 21 2 is in linear contact with the push rod member 2 1 6. The entire part of the periphery of the pusher member 21 6 does not protrude from the guide member 2 1 5 ′, but only a part of the periphery of the pusher member 21 6 protrudes from the guide member 2 1 5 to change the diameter. The shaft portion of the valve 217 (intake valve or exhaust valve) is placed in the guide member 2 1 5 of the valve lifter 214 so that the tip of the shaft portion is close to the bottom surface of the push rod member 2 丨 6. The valve 217 is actuated upwards by a spring not shown in the figure. That is, the valve lifter 214 is placed between the cam 212 and the valve 217. The protruding end of the cam 2 12 is brought into contact with the pusher member 2 1 6 by the rotation of the cam to press down the wide lifter 2 丨 4, so the valve 217 and the valve lifter 214 are pressed down together to resist the spring Force due to

445342

V. Description of the invention (16) This openable valve 2 1 7. The oil storage tank 21 as the oil storage tank part is located outside the upper surface of the guide hole 21 3 (on the 6 side of the push rod member 21) to store the lubricant 2 1 9. The pusher member 2 1 6 is placed in the oil storage tank 21 8 so as to form a small gap between the periphery of the pusher member 2 1 6 and the oil storage tanks 2 1 to 8. That is, when the valve lifter 2 丨 4 is raised 4 ', the pusher member 2 1 6 is moved in the oil storage tank 21 8. As shown in FIG. 4, the depth d of the storage tank 218 is set or needs to satisfy the following formula: dg D_s, where β is from the upper surface of the pusher member 21 6 to when the valve lifter 21 4 is not depressed. The distance of the bottom surface of the oil storage tank. 〇 As shown in FIG. 6, the valve driving device of the third embodiment, when the axes of the valves 3 1 7 and ϊfeihong are inclined (that is, the opposite direction is perpendicular to the axis of the cam rotation center with respect to the upright direction) ' The valve is arranged so that at least the tail end of the pusher member 3 1 6 is lower than the oil level when the valve lifter 3 丨 4 is raised.

According to the valve driving device arranged above, as shown in Fig. 5 (Fig. 6), the cam applies a load to the right side of the push rod member 216 (316) until the valve lifter 21 4 (31 4) After the operation is started, the lifting amount of the valve lifter 21 4 (3 1 4) reaches the maximum value. Therefore, the force distance acting on the valve lifters 2 丨 4 (3 1 4) and the rotation direction of the cam 212 (312) are in the same direction. As shown in Figure 5 (Figure 6) 'As a result, the valve lifter 2 1 4 (31 4) will be tilted to the right, so the guide member 215 (315) and the guide hole 213 (313) are above the valve lifter. The gap on the left side becomes larger. When the upper gap becomes larger like this, the lubricating oil 2 1 9 (3 1 9) in the oil storage tank 21 8 (3 1 9) is placed at the rear end of the push rod member 2 1 6 (3 1 6) on the gap. Press down (to the direction shown by arrow A in Figure 5 (Figure 6)), so the lubricant 21 9 (31 9) fills this gap.

Page 19 > 445342 V. Description of the invention (17) At the same time, the lubricating oil 21 9 (3 1 9) is pushed to the outer end of the push rod member 21 6 (31 6) and the push rod of the oil storage tank 21 8 (31 8) The outer end of the component 21 6 (31 6) and the gap between the oil storage tank 218 (318) (to the direction shown by arrow B in Figure 5 (Figure 6)), and the lubricant 219 (319) is led to the cam 212 (312) side. The lubricating oil 2 1 9 (31 9) in the oil storage tank 2 1 8 (31 8) is disturbed by the umbrella-shaped push rod member 216 (316), and the valve lifter 21 4 (3 14) is raised The operation ejects the deposit.

When the valve lifter 214 (314) reaches the highest position so that the valve lifter can obtain the maximum lifting amount, the force distance acting on the valve lifter 21 4 (3 1 4) will act on it. The direction is opposite, so the valve lifter 21 4 (3 1 4) is tilted to the left 'as shown in Figure 5 (Figure 6). In this example, although the clearance between the guide 2 1 5 (31 5) and the guide hole 21 3 (3 1 3) on the lifter becomes smaller, the lubricant 2 1 9 (3 19) A squeezing effect is generated, so that the valve lifter 2 1 4 (31 4) does not change its state quickly. In the valve driving device described above, when the valve lifter 214 (314) is raised, the lubricating oil 2 1 9 (31 9) in the storage tank 21 8 (3 1 8) is pushed by the rod member 216 (316 ) Is pushed into the gap between the guide 215 (3 15) and the guide hole 21 3 (31 3). In this case, the lubricant 21 9 (319) and the lubricant 2 1 9 (31 9) supplied to the gap between the guide 2 1 5 (3 1 5) and the guide hole 21 3 (31 3) are supplied. No viscosity. Also, since the lubricant 2 1 9 (31 9) is pushed to the gap between the outer periphery of the push rod member 216 (316) and the oil storage tank 21 8 (318), the standing lubricant 2 1 9 (3 1 9) is introduced to The cam 21 2 (31 2) side enables the lubricant 219 (319) to be supplied to the contact surface between the cam 212 (312) and the pusher member 216 (316).

Page 20 445342 V. Description of the invention (1S) ---- As the friction between the gap and the contact surface becomes smaller, the stroke operation is caused when the lifter 2 1 4 (31 4) changes state. The noise is reduced, and the wear caused by the stroke operation is reduced. As a result, the wheel efficiency and fuel consumption of the engine are improved, and the durability and reliability of the engine are also improved. A valve driving device according to a fourth embodiment of the present invention will be described with reference to FIGS. 7 to 11. Figures 7 and 8 show the valve lifter not pressed down, while Figures 9 and 10 show the valve lifter down. Figure 丨 丨 is a part of the valve drive device, this figure is viewed from the section line νιι-νπι on Figures 7 and 9. As shown in these drawings, the push cup member 416 protrudes from the outer peripheral surface of the guide member 415 to the diameter direction of the guide member to form a protruding end (43). An oil storage tank 421 is used as the oil storage tank portion 'to store the stored oil 4 1 9 on the periphery of the upper surface of the guide hole 41 3. As shown in Figures 7, 9, and 11, the oil storage tank 421 is located at the notched end 4 2 2. The formation of this notched end is partially removed from the opposite end of the inner surface of the oil storage tank to form a concave shape. The direction perpendicular to the axis of the center of rotation of the cam 4 1 2 (left and right directions on the figure). As shown in Figures 8 and 10, except for the notched end 4 2 2, the part of the oil storage tank 4 21 (that is, this part is mainly along the axis of the rotation center of the cam 41 2) is opposite to the pusher member 4 6 Side so that a gap is formed between them. According to this arrangement of the valve driving device, when the valve lifter 414 is raised, the lubricating oil 41 9 in the oil storage tank 4 2 1 is pushed to the guide member 4 5 and the guide hole by the tail end of the push rod member 4 丨 6. 41 3 in the gap, so the lubricant 4 1 9 can

Page 21 445 34 2 V. Description of the invention (19) Supply to the gap between the guide member 4 1 5 and the guide hole 4 1 3. The lubricating oil 41 9 pushed into the gap between the outer periphery of the pusher member 4 1 6 and the oil storage tank 42 1 is mainly along the axis of the center of rotation of the cam 41 2 ′ and is guided to the side of the cam 41 2. The lubricating oil 4 1 9 in the oil storage tank 4 21 is disturbed by the umbrella-shaped pusher member 4 16, and the raising operation in the valve lifter 414 can eject the deposit. When the valve lifter 414 is raised, the lubricating oil 41 9 is pushed from the notched end 422 to the upper surface of the pusher member 416, and a lot of the lubricating oil 4 9 is guided between the cam 41 2 and the pusher member 4 1 6 The contact surface thus lubricates the contact surface between the cam 41 2 and the pusher member 4 1 6. As a result, the friction between the gap and the contact surface becomes smaller, so when the lifter 4 1 4 changes state, the noise caused by the stroke operation is reduced, and the wear caused by the stroke operation is also reduced. Therefore, the rotation efficiency and fuel consumption of the engine are improved, and the durability and reliability of the engine are also improved. A valve driving device according to a fifth embodiment of the present invention will be described with reference to FIGS. 2 to 14. Fig. 12 shows the state where the valve lifter is not depressed, and Fig. 3 shows the state where the valve lifter is depressed. Fig. 14 is a diagram of a part of the valve driving device, and this figure is viewed from a section line on Fig. 12. As shown in these figures, the valve 517 is placed obliquely to the cylinder's line of contact (the direction relative to the upright direction is perpendicular to the line of rotation of the cam). The pusher member 516 protrudes from the peripheral surface of the guide member 515 to the direction of the member to form a protruding end (5 30). A storage tank 526 is formed so that the stored lubricating oil 519 is formed in the guide hole 5U. The oil storage tank 526 is located at the notched end 527. This notch = ί 445 3 4 2 V. Description of the invention (20)-The opposite part of the inner surface of the oil tank is formed in a concave shape to the axis perpendicular to the rotation center of the cam 512 Direction (left and right directions on the figure). Except for the missing end 522, the part of the oil storage tank 526 (that is, the part mainly along the axis of the rotation center of the cam 5i2) is on the opposite side of the pusher member 5 to 6 so as to form a gap between them.

According to the wide driving device of this arrangement, when the valve lifter 5 is raised, the lubricant 51 9 is pushed from the notched end 527 to the upper surface of the push rod member 516, and the lubricant 519 is guided to the cam 512. Contact surface with the pusher piece 516. It is also special that when the engine is rotating at a high speed, the lubricating oil 5/9 at the notched end 527 is pressed out by the pusher member 516 at high pressure, so the lubricating oil 519 may splash on the face of the cylinder head 5 11 and the like. The splattered lubricating oil 5 丨 9 then rebounds from the surface and is introduced into the protruding end of the cam 512. The bottom end of the protruding end is smaller than the diameter of the push cup 5 1 6. Therefore, the contact portion between the cam 51 2 and the pusher member 5 1 β is sufficiently lubricated.

As a result, high friction and high wear energy at the contact surface are prevented, so the output efficiency and fuel consumption of the engine can be improved, and the durability and performance of the engine can be improved. A sixth embodiment according to the present invention will be described with reference to FIGS. 5 and i 7. 15 and 16 are front views showing a schematic diagram of a valve driving device according to a sixth embodiment of the present invention, wherein FIG. I 5 shows a state in which the valve lifter is not depressed, and Figure 16 shows the valve lifter being depressed. Fig. 17 is a drawing of a part of the valve driving device, and this drawing is from the section line XIV ~ Xi V in Fig. 5. As shown in Figures 15 and 16, the cam 631 is placed in the cylinder head of the engine

Page 23 445342 V. Description of the invention (21) Above '-' 611. The diameter ^ of the pusher member 616 is made smaller than the diameter R of the round end of the bottom portion of the cam 631. The pusher member 616 has a protruding end protruding from the peripheral surface of the guide member to the diameter direction of the guide member. An oil storage tank 632 is used as the oil storage tank portion 'to store the lubricating oil 6 1 9 on the periphery above the guide hole 6 1 3. As shown in Fig. 7, 'the oil storage tank 632 is in the larger diameter end 633, and the larger diameter end 6 33 is the part that removes the opposite part of the inner circumferential surface of the oil storage tank to form a round shape.' The direction of the guide is perpendicular to the axis of the rotation direction of the cam 613 (left and right directions of the drawing). Except for the larger diameter end 633, each part of the oil storage tank 632 and the push rod member 616 are spaced apart by a gap. According to the valve driving device of this arrangement, when the valve lifter 614 is raised, the lubricating oil 6 1 9 is pressed out from the larger diameter end 633 to the upper surface of the push rod member 616 and the lubricating oil 6 1 9 is drawn. To the contact surface of the cam 6 31 and the push rod member 61 6. It is also special that when the engine is rotating at high speed, the lubricating oil 6 1 9 in the larger diameter end 6 3 3 is pushed out by the push rod member 6 1 6, so it splashes out. In this example, 'because the diameter r of the pusher member 6 1 6 is made smaller than the bottom round end $ diameter R' of the cam 63 1, the spilled lubricant 6 丨 9 is directly introduced into the protruding end of the cam 6 3 1. Therefore, the contact surface between the cam 6 1 3 and the push rod member 6 1 6 is bent to be lubricated. As a result, because high friction and high wear energy can be prevented at the contact surface, the output efficiency and fuel consumption of the engine can be improved, and the durability and reliability of the engine can also be improved. A seventh embodiment according to the present invention will be described with reference to FIGS. 8 and 9. As shown in these figures, the placement of the valve 7 1 7 is inclined to the axis of the cylinder (ie

Page 24 445342 V. Description of the invention (22) -------- The opposite direction is the axis perpendicular to the center of rotation of the cam relative to the upright direction. The pusher member 716 protrudes from the peripheral surface of the guide member 715 to the direct inspection direction of the guide member to form a protruding end (73) ^ An oil storage tank 736 is used as the oil storage tank portion, so that the stored lubricating oil 719 is formed in the guide hole 713 Outside the park. The oil storage tank 736 is at the larger diameter end 737. The larger diameter end 737 partially removes the opposite part of the inner circumferential surface of the oil storage tank to form a semi-sui circular shape, and guides the direction of the main shaft section fixed on the oblique inner side. An axis perpendicular to the center of rotation of the cam 713 (left side of the figure). Except for the larger diameter end 737, there is a small gap between the part of the oil storage tank 7 3 6 and the pusher member 7116. According to the valve driving device of this arrangement, when the valve lifter 714 is raised, the lubricating oil 7 1 9 is pushed out from the larger diameter end 73 7 to the top of the push rod member 7 丨 6, and the lubricating oil 719 is drawn. To the contact surface of the cam 731 and the pusher 716. It is also special that when the engine is rotating at a high speed, the lubricating oil 7 1 9 in the larger diameter end 6 3 3 is pushed out by the pusher member 71 6, so it splashes out. In this example, 'because the diameter r of the pusher member 7 1 6 is made smaller than the diameter R of the bottom round end of the cam 7 3 1, the spilled lubricant 71 9 is directly introduced into the protruding end of the cam 7 31. Therefore, the contact surface between the cam 71 3 and the pusher member 7 1 & is sufficiently lubricated. As a result, high friction and high wear energy at the contact surface can be prevented, so the output efficiency and fuel consumption of the engine can be improved, and the durability and reliability of the engine can also be improved. A valve driving device according to an eighth embodiment of the present invention will be described with reference to FIGS. 20 to 24. As shown in these figures, the cylindrical guide 8 1 2 of the valve lifter 81 ι is located in the guide hole 8 0 6 of the cylinder head 8 0 2 so that

Page 25/445342 · V. Description of the invention (23) It can slide freely. A disc-shaped pusher member 8 1 3 and the upper side of the guide member 8 1 2 are integrally formed. The diameter R of the pusher member portion 8 1 3 is larger than the diameter r of the guide member 8 1 2. The pusher member 813 is formed to be connected to the upper section of the guide member 806 to form an umbrella shape. The pusher member 813 is formed into a substantially flat circular portion so as to be in contact with the protruding end of the cam 803. The protruding end of the cam 8 03 linearly contacts the pusher member 8 1 3. The valve driving device is set when the valve 8 07 is depressed to the maximum, that is, the lifting amount of the valve lifter 811 reaches the maximum value, and only the guide member 812 is in the guide hole 80 6 (the push rod member 816 is not in the guide). Hole 806). A peripheral groove 8 1 4 is used as an elastic deformation-promoting end r, and is formed on the outer circumference of the guide 812 at the root of the pusher member 813. Therefore, when the guide 812 is in the guide hole 806, the peripheral groove 814 is formed. Promote elastic deformation of the guide 812. As shown in Figures 21 and 22, the valve lifter 811 made in this way is applied to the right side of the pusher member 813 by a cam in Figure 21 until the valve is raised After the lifter 8 1 1 starts the lifting operation, the lift amount of the valve lifter 811 reaches the maximum value. Therefore, the torque applied to the valve lifter 811 is in the same direction as the rotation direction of the cam 803. As a result, the valve lifter 81 1 is tilted to the right in the figure (that is, the opposite direction is perpendicular to the axis of the cam rotation center with respect to the upright direction). Therefore, the guide member 81 2 and the guide hole 8 0 6 are above the valve lifter. The gap on the right becomes smaller. When the moment acting on the valve lifter 811 and the rotation direction of the cam 8 03 are in the same two directions, so that the valve lifter 8 1 1 changes its state, the guide member 81 2 is outside the circumference of the guide member 8 1 2 The outer groove 8 1 4 is elastically deformed, so the guide 4- 4 b 3 4

The outer circumference of the guide member 812 is matched to the inner circumference of the guide hole 806. Therefore, the lubricating oil between the guide 812 and the guide hole 806 is prevented from being pressed out, and a layer of oil film is maintained between the two. Therefore, when the valve lifter changes its shape, the stroke operation is prevented. The noise caused is suppressed, and the wear caused by the stroke operation is also suppressed, so the friction is reduced. V. Description of the invention (24) The crying river is as shown in Λ23Λ and Fig. 24, because in Fig. 23, when the valve rises, the 811 rises to 1 and reaches the maximum value, the cam applies the load to the push rod. Left side of 813. Therefore, the moment acting on the valve lifter 81 is opposite to the rotation direction of the cam 803. As a result, the valve lifter 811 is tilted to the step shown in the figure. This means that the guide member 812 and the guide hole 806 on the upper side of the valve lifter are permanently smaller. When the torque acting on the valve lifter 811 and the rotation of the cam 80 ° are reversed, the valve lifter 8 1 1 changes its state, because of the peripheral groove 814 on the outer circumference of the guide 8 j 2 Elastic deformation, which is the opposite of the case in Figure 21, so the outer circumference of the guide member 8 1 2 is matched to the guide hole 80 6 to prevent 1 Therefore, because of the slip between the guide member 812 and the guide hole 806 Different throttles are pressed out to keep a layer of oil film between the two.5 As the B recognition device changes its state, the chewing sound caused by the stroke operation is suppressed, and the wear caused by the stroke operation is also reduced. Press, so the friction is reduced = and $ is a circumferential groove 8 1 4 has a groove, which can perform grinding on the outer surface of the end of the pusher member 8 1 3 to the direction of the member 812, so that the valve lifter Η 】 Very easy to operate.

Claims (1)

445342 6. Scope of patent application 1. A valve driving device using a direct drive valve lifter, which is a cam (102, 212, 312, 412, 512, 631,731, 803) and a poppet valve (105 , 117, 118, 217, 317, 417, 517,617, 717, 807), the poppet valve is in the passage of the cylinder head (112, 211, 31 1, 411, 511, 611, 711, 80 2) of the internal combustion engine. (1 21,122) and move in the axial direction of the valve to open and close the channel, the valve driving device includes: a guide hole (123,213,313,413,51 3,61 3,71 3,806) on the cylinder head; and Direct-drive valve lifters (101, 214, 314, 414, 514, 614, 71 4, 811), including pusher pieces (103,216,316,416,516,516,616,716,813) '' The pusher piece is in contact with the cam and is depressed by the cam; and Guide (104, 215, 315, 415, 515, 615, Ή5, 812) 'One end is connected to the push rod and is located in the guide hole, so that when the cam is used as the push operation of the push rod, The hole can slide freely in the axial direction of the poppet valve in an interlocking manner. (R) part of the member is made smaller than the diameter of the push rod (R). 2 _ The valve driving device according to item 1 of the scope of patent application, wherein the channel includes at least the intake passage of the internal combustion engine (121) ° 3 · The valve driving device according to item 2 of the scope of patent application 'wherein the cam The shaft is placed on the upper side of the cylinder head. One end of the air intake passage opens to the combustion chamber of the internal combustion engine, and the other end opens to the top of the steam red cover. 4 · The valve driving device according to item 2 of the scope of patent application ', 445342 6. Scope of patent application: At least two poppet valves are provided on the intake passage of the cylinder head of the internal combustion engine. 5. The valve driving device according to item 1 of the scope of the patent application, wherein the open end of the guide hole is provided with an oil storage tank (218,318,421, 5 26,632,736) to store the lubricating oil; the diameter of the push rod member is at least half larger than the guide member The diameter of the pusher member is protruded from the peripheral surface of the guide member to the diameter direction of the guide member to form a protruding end (23 0,3 30,4 30,53 0,630,73 0); and when the valve lifter is raised When raised, the protruding end can move in the oil storage tank. 6. The valve driving device according to item 5 of the scope of patent application, wherein a gap is maintained between the outer surface of the oil storage tank and the end of the push rod member, so the lubricant can splash out of the gap. 7. The valve driving device according to item 6 of the scope of patent application, wherein the arrangement of the gap is such that the direction opposite to the width of the gap is perpendicular to the axis of the center of rotation of the cam, and the periphery of this width is greater than the width of the rest . 8. The valve driving device according to item 6 of the scope of patent application, wherein only a part of the gap faces in a direction perpendicular to the axis of the center of rotation of the cam and its periphery. 9. The valve driving device according to item 8 of the scope of patent application, wherein the valve lifter is placed obliquely with respect to the upright direction, that is, the facing direction is perpendicular to the axis of the cam rotation center, and the gap is only a part To the downward direction of the two directions, so as to be perpendicular to the axis of the center of rotation of the cam and its periphery. I 0. The valve driving device according to item 5 of the scope of patent application, wherein the diameter of the push rod member is smaller than the diameter of the bottom round end of the cam. II. The valve actuating device described in item 1 of the scope of patent application, further comprising Page 29 445342 VI. Scope of patent application An elastic deformation-promoting end (8 1 4), when the guide is located in the guide hole, can promote the elastic deformation of the guide. 12. The valve driving device according to item 11 of the scope of patent application, wherein the elastic deformation-promoting end is on the guide member, near the boundary between the push rod member and the guide member. 1 3. The valve driving device according to item 12 of the scope of patent application, wherein the elastic deformation-promoted end is a groove, and the groove is on the outer circumference of the guide. Page 30