JP2000087708A - Valve for internal combustion engine and cooling method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a valve for internal combustion engine with a cooling-type disk which requires lower installation height as compared to conventional arts but effectively and surely cools the valve disk. SOLUTION: A valve 1 comprises an axially movable main shaft 2 provided with a valve disk 4 at one end thereof and chambers. At least one chamber communicates with the coolant supply source and at least one chamber communicates with the coolant discharge port. The main shaft wall is provided with holes through which heat is exchanged between the chambers and a coolant passage provided within the main shaft 2 and the holes communicate with coolant cavities within the disk 4. The holes 23, 24 of the main shaft wall are located at an equivalent or similar height in the axial direction of the main shaft 2. Also, the coolant chambers 16, 17 are located at an equivalent height in the axial direction but separated from each other in the peripheral direction of the main shaft 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a main shaft which is axially displaceably supported in a main shaft guide and has a valve disk at one end thereof, wherein the main shaft has a cavity for coolant formed in the disk. A valve for an internal combustion engine having at least one coolant passage communicating therewith, comprising a chamber, wherein at least one of the chambers is in communication with a coolant supply port, and wherein at least one chamber is provided with a coolant drain. A valve in communication with the outlet, wherein the spindle wall has a hole for exchanging coolant between the chamber and at least one coolant passage formed in the spindle.

[0002]

2. Description of the Related Art German Patent No. 43 13 591 discloses that
The main shaft guide has two outwardly bent hollow bodies, one of which overlaps the other and defines, together with the valve main shaft, two long annular chambers sealed together toward the main shaft by an intermediate sealing ring. An oil cooled valve of the above type is described which forms and forms an inlet chamber and an outlet chamber for oil. The valve spindle is hollow and is divided into a small upper space and a long lower space that opens into a cooling space in the valve disk. The upper space and the lower space in the main shaft communicate with the respective annular chambers of the main shaft guide by radial holes formed in the main shaft wall. To maintain this communication to circulate cooling oil through the main shaft during the entire period during which the valve moves up and down, the annular chambers around the main shaft each have a length at least equal to the travel of the valve. Must have a length equal to the diameter of the radial hole in the spindle wall, so that the spindle wall opens into the annular chamber throughout the travel. Thus, especially in large engines where the valve spindle has a relatively long travel distance, the presence of the annular chamber and the required spindle seal around the chamber results in the valve having a disc to be cooled. Not requiring substantially higher mounting heights than corresponding valves.

[0003] In Danish patent 5611/74, secondary coolant is likewise exchanged between a spindle guide and a spindle, but the spindle and the disc are closed chambers forming a so-called heat pipe. A valve for an internal combustion engine having a primary coolant therein is described. The primary coolant is sodium, which is swung up and down in the chamber by opening and closing operations of the main shaft, so that heat can be transmitted from the disk to the main shaft. In the main shaft, heat exchange takes place between the primary coolant, which can be oil, and the secondary coolant.

Furthermore, French Patent No. 75 38 193 describes a liquid-cooled disk valve in which a coolant is introduced into a passage opening at the end of the main shaft opposite the disk. For the introduction of the coolant, the rocker arm driving the valve has an inlet passage for the coolant, and the rocker arm is connected to the end of the main shaft via a ball joint, and the coolant is introduced through the ball joint. It can be done in such a way that it can flow from the passage into the passage of the main shaft. Coolant can be delivered from the spindle through the spindle wall in the same manner as described above. For valves not driven by rocker arms or by similar elements at the spindle end, this solution results in a higher mounting height. Furthermore, it is practically difficult to effectively seal the connection between this element and the spindle end due to the large axial forces that occur when the valve opens and closes. I know that.

[0005] Finally, DE 26 32 411 discloses that cooling air is sucked through the main shaft wall and flows out behind the valve disc, so that the air is
An air-cooled exhaust valve to be carried is described. However, such valves are not suitable for mass cooling, such as with oil or water, because they adversely affect the exhaust system.

[0006]

In particular, in the case of modern diesel engines for ship propulsion, the overall height of the engine compartment is affected by the height of this valve and has a certain number of decks. The overall mounting height of the engine is a very important factor, as this height is crucial in determining whether a ship can be equipped with an engine. All prior art valves with discs to be cooled have ever cooled the discs in the case of large marine engines, since the valve height is substantially higher than the corresponding valves with uncooled discs. That was not going.

[0007] It is an object of the present invention to provide a valve of the type mentioned at the beginning, having a lower mounting height than prior art valves, having a cooled disk, which effectively and reliably cools the valve disk. That is.

[0008]

DISCLOSURE OF THE INVENTION In view of this object, a valve according to the present invention comprises a plurality of holes in a spindle wall arranged at a height equal to or close to each other in the axial direction of the spindle, and a plurality of coolants. The chambers are arranged at the same height in the axial direction and are separated from each other in the circumferential direction of the main shaft.

[0009] In this way, the coolant chamber can be separated around the valve spindle, so that the required additional total mounting height compared to the spindle without cooling is: With an intermediate spindle seal, less than half the additional height required in the prior art, where two coolant chambers are located within each other's extensions. Rotation of the main spindle during operation is still possible, so that
The holes in the spindle wall pass through the coolant chamber one by one, whereby the holes alternately function as inlet and outlet openings for the coolant. The coolant chamber
For example, it can be integrated with the spindle guide, thereby significantly reducing the additional mounting height, or these coolant chambers can be formed in an additional housing around the spindle. . Towards the spindle, these chambers can be sealed to each other and to the surrounding environment by a separate seal on the sliding surface of the guide or part of that surface.

[0010] In the circumferential direction of the spindle, the hole in the spindle wall has two holes.
It has a length shorter than or equal to the length in the same direction as the wall separating the two coolant chambers. This prevents any direct short circuit through the hole between the chamber communicating with the coolant supply and the chamber communicating with the coolant outlet, and the interior of the main shaft is bypassed, thus It is ensured that the coolant always flows efficiently through the main shaft. However, if the flow from the supply side to the discharge side is completely interrupted, for example when all the holes in the main shaft wall pass through the partition wall between the two coolant chambers at the same time, a short circuit will occur for a short time. Is desirably performed.

In the circumferential direction of the main shaft, the distance between the holes of the main shaft wall can be shorter than the distance of the coolant chamber in the same direction. This allows the coolant chamber and spindle wall holes to be arranged in a number and spacing to keep the coolant inlet and outlet open for all angular positions of the spindle, resulting in uniform flow. Guarantee. However, alternatively, in some embodiments, it is desirable for the distance between the two holes to be large. The reason for this is that a kind of pumping effect is obtained in which the flow is interrupted for a short period of time and thus the flow in the main shaft can be promoted.

[0012] In one advantageous embodiment, each of the holes in the spindle wall is in communication with a separate coolant passage in the spindle. This passage extends, for example, linearly or helically downwardly towards the valve disc, thereby directing the coolant towards and away from locations where cooling is particularly required. , Can be energized.

Separate coolant passages may be connected together to provide a single passage extending into the valve disk.
The coolant can then be urged through these separate passages to and from the connection passage. The splash effect from this connection passage (splash effect splash
ng) undertake the further exchange of coolant into the valve disk cavity under the effect of opening and closing the valve.

In one embodiment, which is very simple to manufacture, the spindle has a single axial coolant hole in which all holes in the spindle wall are open and the cooling The bore extends into a cavity or passage in the valve disc.
The coolant is then transported to and out of the valve disk by a splash effect over the shaft bore.

A single guide plate device, preferably a cylindrical body coaxial with the hole, provides cooling of the spindle between the holes in the spindle wall so as to deflect the flow of coolant through the hole. It is advantageous to place it in the bore. This prevents the coolant flow from being sprayed through the holes and continuing to flow straight through the opposite holes. Such guide plates may also be designed such that the coolant flowing through the holes is biased in a direction toward the disc, thereby ensuring more efficient coolant exchange for the disc.

Further, the hole in the main shaft wall may be constituted by a hole having an axis forming an acute angle with respect to the radius of the main shaft. This can also ensure that the coolant does not splash directly through the spindle. Further, the coolant may be circulated along the inner surface of the bore of the main shaft, so that a more effective mixing effect may be obtained.

In one embodiment having separate coolant passages in the main shaft, these coolant passages extend to the valve disk, where the coolant passages comprise:
Advantageously, it is in communication with a cavity or passage for the coolant in the disk. This will provide the coolant as quickly as possible where it needs the most cooling.

In one preferred embodiment, the valve disk has an annular cooling passage according to the seating surface of the disk, each of the separate coolant passages in the main shaft extending outwardly in the disk. Preferably, the annular passages communicate with the annular passages, and these passages are preferably uniformly separated in the circumferential direction. In this way, the coolant is urged to circulate through both the spindle and the disc,
It flows downward through some passages in the main shaft, passages extending outward of the disk, a portion of the annular passage of the disk, and similarly flows back through passages extending inward, and finally, It can flow through some of the other passages. The heaviest load is applied to the area near the seating surface of the disk, and the annular passage can reduce the heat portion of the load.

In this regard, four holes uniformly spaced in the circumferential direction of the main shaft form holes in the main shaft wall, and the coolant chambers are substantially diametrically opposed to each other with respect to the main shaft. Is advantageously formed by two chambers arranged in such a manner. The four uniformly spaced holes formed in the spindle wall ensure uniform flow of the coolant through the spindle described above and almost always allow the coolant to flow through all parts of the annular passage of the disk. Guarantee. Of course, it is also possible to provide more coolant chambers, which makes it possible to change the flow direction in the main shaft passage more frequently during rotation of the main shaft, but to change the coolant flow in the main passage. Each time the total dead volume becomes larger, that is, the flow direction in the passage is reversed,
The amount of coolant that flows back to the disk without first being replaced by cooled coolant will increase, which will lead to a reduced cooling effect.

In one advantageous embodiment, the coolant passage in the main shaft is formed in an axial bore therein and is separated by a long partition. The long partition has a cross-shaped cross-section and is inserted into the hole, the longitudinal edge of which seals the wall of the hole. This design requires less effort than forming four separate longitudinal slots, which is also possible. For example, unlike designs with concentric pipes mounted inside each other, the heat exchange between these two passages is minimal, so that most of the time the coolant will be
It would be further advantageous if the holes in the spindle and the coolant chamber were arranged to flow only through two opposed passages.

In another embodiment, the valve disc comprises:
It has a single continuous cavity extending to an area near the seating surface of the disk and communicating with all the holes in the spindle wall through the spindle. This coolant is swung around the continuous cavity while the valve is reciprocating, cooling the disk by splash cooling.

In one particularly advantageous embodiment, the valve includes, for example, a rotor blade (impeller blade),
A means for rotating the valve shaft is provided. In particular, some coolant passages span at least a portion of the passages in the main shaft,
In an embodiment in which the coolant is carried to and from the valve disc, the spindle always rotates at a predetermined speed,
Next, "low temperature" and "high temperature" coolant alternately flow in the passage of each coolant, resulting in a uniform method of uniform temperature distribution in the spindle and neutralization of thermal deformation of the spindle. That is, it is extremely advantageous if thermal deformation is prevented. In embodiments where the spindle bore is formed with respect to the coolant chamber, it is advantageous to force the spindle to rotate so that flow through the spindle and the disc is periodically interrupted. The reason for this is that, in a disadvantageous environment, a stationary spindle would block the flow of coolant.

The present invention also provides for cooling of the valve disc during operation of the engine, wherein coolant is supplied to the valve disc through one or more coolant passages in the valve spindle and one or more coolant passages in the spindle. It also relates to a method of cooling a valve in an internal combustion engine that is carried from a disk through a coolant passage. According to the invention, the method is characterized in that the coolant in the individual coolant passages in the main shaft alternately flows into and out of the disk.

[0024] In one preferred method, the valve comprises a chamber which is open towards the main shaft and has a limited length in the circumferential direction of the main shaft, the main wall being provided with cooling in the main shaft. It has holes spaced circumferentially of the main shaft with respect to the agent passage, and coolant is supplied to the holes from one or more chambers and is carried from these holes to the one or more chambers. These holes are made to pass through the chamber by rotation of the main shaft.

[0025]

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in more detail, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 shows an example of a valve according to the invention in the form of an exhaust valve 1 having a main shaft 2 which is axially displaceably supported in a main shaft guide 3 mounted in an exhaust valve housing 6. Is illustrated. The exhaust valve, at its lower end,
It has a valve disc 4 which faces the combustion chamber of the engine cylinder (not shown) and which is mounted on the underside of a housing 6 mounted in a cylinder cover (not shown). Cooperates with the fastened bottom piece 5. In the drawings, the spindle 2 and the disc 4 are shown as one piece, but they can be manufactured in two pieces and assembled, for example by friction welding or screwing, and they can be made of different materials. Can be manufactured. The valve disc 4 has a seating surface 7 which cooperates with an opposite seating surface 8 on the bottom piece 5. In the open position of the valve (not shown), gas from the engine cylinder can flow out through the passage 9 in the bottom piece 5 and through the valve housing 6. A rotor blade (impeller wheel) 10 capable of rotating the main shaft 2 by the action of the flow of exhaust gas passing through the passage 9 is fastened to an empty portion of the main shaft 2 in the passage 9. An actuator 11 having a housing 12 for holding a hydraulic piston 13 and a pneumatic piston 14 is arranged at the end of the main shaft opposite to the disk 4. The hydraulic piston and the pneumatic piston are both
It is attached to the main shaft 2 and serves to move the main shaft 2 up and down and open and close the valve 1 in a manner known per se.

Between the spindle guide 3 and the actuator 11, the spindle 2 is surrounded by a housing 15, which has chambers 16, 17 open toward the spindle 2, Communicates with the coolant supply conduit 18 and the chamber 17 is provided with the coolant discharge conduit 1.
It communicates with 9. The coolant can be any suitable fluid, such as, for example, water or oil, and the coolant can be supplied from the engine's normal cooling system. The housing 15 is hermetically sealed with a normal seal 20 at a position penetrating the main shaft.

FIG. 2 shows another embodiment of the valve shown in FIG. In this case, the coolant chambers 16, 17
Are formed in a housing 21 which also functions as a guide for the spindle 2, which results in a more compact valve 1, which in principle has no coolant circulating through the spindle 2 than the corresponding valve. Does not require long mounting lengths. Replaceable liner (not shown) with spindle 2
It is clear that the coolant chambers 16, 17 can be formed in the liner or extend through it. In this embodiment, the seal 20 of the main shaft includes:
As such, it forms a well-known indicator hole 22 that, if there is any defect in the seal, allows the coolant to leak through the hole, thereby indicating the leak so that the leak can be repaired. It is further thought that there is.

FIG. 3 shows the line II of FIG. 2 when viewed in the axial direction.
FIG. 3 shows a cross-sectional view of the valve 1 along I-III, this embodiment having two coolant chambers 16, 17 diametrically opposite about the main axis 2 and separated from one another,
Has four radial holes 23, 24, 25, 26 reaching into the axial holes 27 of the main shaft 2. In the position shown, the hole 23 opens into the chamber 16 and the hole 24 opens into the chamber 17, while the holes 25, 26 define the respective walls 48, 4 in the guide 21 between the chambers 16, 17.
9 closed. Spindle 2 is 1 / clockwise
When rotated four times, hole 26 opens into chamber 16 and hole 25 opens into chamber 17 while holes 23 and 24 are closed by walls 48 and 49, and a further 1/4 turn clockwise. , Hole 24 opens into chamber 16,
The hole 23 opens into the chamber 17. FIG.
Shows the same embodiment as FIG. 3, but in this case the main shaft 2 has two holes 23, 26 open into the chamber 16,
The other two holes 24, 25 are in positions that open into the chamber 17. Therefore, as the main shaft 2 rotates, the holes 2
Each of 3, 24, 25, 26 alternately functions as an inlet opening, is closed, and functions as an outlet opening. Furthermore, the holes 23, 24, 25, 26 are arranged at the same position in the axial direction of the main shaft, and the coolant chambers 16, 17
Have a length in this direction, so that when the main shaft 2 is displaced up and down so as to open and close the valve 1, the holes 23, 24, 25, 26 always have the chamber 16,
At the same height as 17. That is, the length is substantially equal to a value obtained by adding the diameter of the holes 23, 24, 25, and 26 to the moving distance of the main shaft. In this way, it is possible to circulate the coolant through the main shaft 2 via the chambers 16, 17 at all possible working positions of the main shaft.

The hole 27 has an insert 32 over its entire length.
Are divided into four passages 28, 29, 30, 31. The insert has a cross-shaped cross-section and can be formed, for example, by connecting two metal sheets bent at 90 ° each. Passages 28, 29,
The insert 32 sealing the 30, 31 is fixed in the hole 27, for example by pressure, and the radial holes 23, 24, 25,
One of the 26 is oriented so as to open in each passage 28, 29, 30, 31. The hole 27 is a radial hole 23,
It ends slightly above 24, 25, 26 and extends downward into the valve disc 4 and is closed by a plug 33 welded at the valve disc. The hole 27 with the insert 32 can also be replaced by four separate passages in the main shaft 2, such passages being in the form of longitudinal holes, spiral passages and the like.

In the valve disk 4, the annular cooling passage 3
4 extends in the area of the seating surface 7, from which four passages 35, 36, 37, 38 are drilled radially inward and obliquely upward, each of which is a passage 28, 29, 30, 31; Open in one of the In the embodiment shown, the annular passage 34 is formed by turning from the bottom of the disc 4 and then closed by welding a ring 39, but with the disc 4 and / or the spindle 2
Can be manufactured by methods other than those described above, for example, formed by powder pressing, such as HIP (Hot Isostatic Pressing), whereby without subsequent drilling or turning,
Cooling passages can be formed during manufacturing.

At the position of the main shaft 2 shown in FIG. 3, the coolant flows from the chamber 16 through the hole 23 and flows downward through the passage 28 formed in the main shaft 2, and the coolant flows to the disk 4. At this disk, coolant flows outwardly through passage 35 toward annular passage 34. When the coolant flow reaches passage 34, the coolant flow is split into two flows that follow its distinct path within passage 34, as indicated by the arrows, and are diametrically opposed in annular passage 34. Again at the point where they merged, where they merged with the flow flowing through the passage 36 towards the center of the disc 4. Next, the coolant flows upward through the passage 29 of the main shaft 2 and exits through the radial hole 24, after which the flow exits the valve 1 through the chamber 17. This flow pattern, in which the coolant flows through the entire annular passage 34, causes the coolant to pass through the passages 35, 3,
Occurs at most locations on the main shaft 2, except that they are carried alternately through 6, 37, and 38 into and out of the annular passage. However, this situation occurs periodically, for a short time. In this case, holes 23, 24, 2
Two of 5, 26 open to each of the coolant chambers 16, 17, as shown in FIG. For this reason, at the position of the main shaft 2 shown in the drawing, the coolant passes through the two passages 2 of the main shaft 2.
8, 31 and then the coolant flows through two passages 35, 37 extending outwardly of the disk 4 and out into the annular passage 34, from which the annular Two opposing quarters 40 of passage 34,
41 and then, as indicated by the arrows in FIG.
Again through the two passages 36,38. Finally, the coolant flows upward through the passages 29, 30 of the main shaft 2,
First, through holes 24, 25, then coolant chamber 1
It flows out through 7. See FIG. In this situation, the coolant does not flow through the other two quarters 42, 43 of the annular passage 34, so that the disc 4 is not cooled down along the entire seating surface 7, but this situation is instantaneous. It is clear that this is not really of any significance, as it only occurs in the context. An alternative method is to increase the distance between the two holes 23, 26 from that shown in FIG.
This is to ensure that one radial hole 23 is closed, which will block the instantaneous complete flow of the coolant, which is inappropriate if a uniform flow is desired. Become.

Thus, when the flow pattern shown in FIG. 3 occurs over most of the time, the cross-shaped insert 3
2 has the following effects. That is, a passage without a common wall (reference numeral 2 at the position shown in the drawing)
(Shown at 8, 29), the "cold" coolant flows into the disk 4 while the "hot" coolant flows out of the disk. This reduces heat exchange between the coolant in the two passages, for example, as compared to one embodiment where the passages are formed as concentric tubes, one inside the other. Become. If the spindle 2 is provided with a drive which guarantees a given spindle rotation speed, another important advantage obtained is the temperature difference between the "cold" and "hot" coolants. , The temperature difference generated in the spindle 2
It is a very small point. This is because, at all times, the passages 28, 29, 30, 31 in the spindle 2 carry "cold" and "hot" coolant alternately.

FIG. 5 shows one embodiment having a coolant supply chamber 16 and a coolant discharge chamber 17 as in the embodiment shown in FIG. In this case, the spindle wall is provided with two radial holes 4 which serve to exchange coolant between the chambers 16,17.
4 and 45 and only two passages 46 and 47 in the main shaft 2 for exchanging the coolant for the disk 4. The valve disc 4, not shown in this embodiment, comprises only two opposed passages through which the disc 4 extends outwards, one of which, at a given point in time, supplies coolant to a passage 46 in the main shaft 2. , 47 to the annular passage 34, and the other passage carries coolant from the passage 34 to the passages 46 in the main shaft 2,
It corresponds to the embodiment shown in FIGS. 3 and 9, except that it carries to the other side of 47. The advantage of this embodiment is that
The flow direction of the coolant in each of the longitudinal passages 46 and 47 in the main shaft 2 is reversed only after each rotation of the main shaft 2,
Thereby, the adverse effect on the cooling of the disk 4 due to the presence of the dead volume of the coolant in the passages 46 and 47 of the main shaft 2 is reduced. That is, the volume of the heated coolant substantially corresponding to the volume of the passages 46, 47 is not replaced by a "cold" coolant before the flow direction in the passages 46, 47 changes, which adversely affects the cooling effect. . FIG. 5 shows the wall 4 separating the coolant chambers 16 and 17.
Radial holes 44, 45 having a length substantially equal to the circumferential length of the main shafts 8, 49 are shown. However, hole 4
4 and 45 each time they pass through these walls 48 and 49,
The flow of coolant through is momentarily interrupted. This is a disadvantage when a uniform flow is desired. In this case, the holes 44, 45 are formed longer in the circumferential direction of the main shaft than the walls 48, 49, so that the holes 44, 45 are formed.
During the moment when passes through each partition wall 48, 49,
A short circuit path across the holes 44, 45 from the chamber 16 to the chamber 17 is obtained. See FIG. The embodiment of the partition walls 48, 49 and the holes 44, 45 shown in this figure can also be used in the embodiment of the valve 1 shown in FIG. , 2
Since at least one of the 5, 26 already opens into each of the chambers 16, 17, it is not necessary to avoid the flow interruption mentioned above. It is also evident that, even for a short time, a short circuit in the flow through the main shaft 2 reduces the cooling effect.

FIG. 7 shows a further embodiment, in which the main shaft 2 and the disc 4 have four radial holes, as in the embodiment shown in FIGS. 23, 24, 25, 26 are formed, in this case four coolant chambers 50, 51, 52, 53
Are separated about a main axis 2 and, within the chamber, 2
One opposed chamber 50, 52 is in communication with a coolant supply, and two of the other chambers 5
Numerals 1 and 53 communicate with the coolant outlet. In operation, the flow of coolant through the passages 28, 29, 30, 31 in the spindle 2 changes direction four times per revolution of the spindle. In contrast, this direction change occurs only twice in the embodiment shown in FIG. In practice, this is
The above-mentioned effect of reducing the influence of the dead volume of the passage is reinforced.

However, it is also possible to make the dead-volume effect inadequate by forming very short passages 28, 29, 30, 31 or not in the main shaft 2. it can. in this case,
Passages 28, 29, 30, 31 are provided with holes 23, 24, 25,
It extends a distance below the opening 26. Thereby, further transport of the coolant to and from the disk 4 can be performed by a splashing effect in the axial hole 27 of the main shaft 2. In the disk 4 itself,
Cooling can also take place by a splashing effect known per se in a cavity (not shown) extending from the center of the disk 4 to the area of the seating surface 7. In this case, for example, as shown in FIG. 7, there are four coolant chambers in the valve, ie, more coolant chambers 50, 51, 5
It is advantageous to have 2,53. This is because these coolant chambers create greater turbulence in the cooling passages of the main shaft, thereby promoting the splashing effect.

If the insert 32 is completely omitted, the hole 2
The transport of the coolant from 3, 24, 25, 26 to the disk 4 is all effected by a splashing effect in the axial hole 27.
In this case, for example, as shown in FIG.
Can be arranged in the hole 27 between the openings of the radial holes 55, 56, 57. The purpose of the guide plate is to allow the coolant to flow into one of the radial holes 55,56,57.
Flow through one, and then ensure that it does not exit straight out of another opposite hole, and that the coolant is carried down towards the disk 4. Also, the radial holes 55, 56 and 57 are formed at an acute angle with respect to the radius of the main shaft, so that once the coolant enters the hole 27, it immediately leaves the hole again. Make sure there are no. In addition, this allows the coolant to circulate in the holes 27, thereby promoting the splashing effect.

As can be seen, the embodiment shown in FIG. 8 has three radial holes 55, 56, 57 uniformly spaced in the circumferential direction of the main shaft, which is described above. As such, it prevents coolant from flowing directly from one hole to another, and, if desired, a guide device 5.
4 can be omitted. This embodiment also forms a separate passage in the main shaft for each of the holes 55, 56, 57 and also forms a passage system in the valve disc 4 corresponding to the valve disc shown in FIGS. However, as shown in these drawings, there are only three outer passages instead of the four corresponding passages 35, 36, 37, and 38, so that there is always an annular passage through which no coolant flows. There will be a portion that constitutes 1/3 of 34.

In another embodiment, the coolant chamber may be formed, for example, in a housing located on the valve spindle, during operation the housing moves up and down with the spindle in its axial direction, while the spindle is Within which the main shaft does not rotate relative to the valve housing. The supply and discharge conduits for the coolant can then be formed as flexible connections to the chambers in the housing and axially of the main shaft, but the housing is larger than the length of the radial bore in the main shaft. The length can be not significantly long. Also, the coolant chamber is
One or more other elements may be placed between the chamber and the main shaft, which may be rigidly connected to the main shaft, or may not be opened directly towards the main shaft itself.
Or, for example, it can be moved only in the axial direction together with the main shaft. The cooling chamber can also be formed anywhere in the valve other than that shown. These coolant chambers can be, for example, integrated with the actuator.

It is further apparent that the various embodiments described above can be combined in many different ways without departing from the scope of the present invention. The present invention is not limited to only cooling with a particular type of coolant; the secondary coolant is exchanged through the spindle wall in the manner described above;
It also includes a valve that flows through a heat exchanger in the main shaft and serves to cool the valve disk where the primary coolant is cooled.

[Brief description of the drawings]

FIG. 1 is an axial cross-sectional view of one embodiment of a valve according to the present invention.

FIG. 2 is a partial sectional view of another embodiment of the valve according to the present invention.

FIG. 3 is a partial sectional view of the valve taken along line III-III of FIG. 2;

FIG. 4 is a partial cross-sectional view of the embodiment of the valve taken along line III-III of FIG. 2;

FIG. 5 is a partial cross-sectional view of another embodiment of the valve taken along line III-III of FIG.

FIG. 6 is a line I showing details of one embodiment of the valve of FIG. 2;
FIG. 3 is a partial cross-sectional view along II-III.

FIG. 7 is a view corresponding to FIG. 4 of another embodiment of the valve;

FIG. 8 is a view corresponding to FIG. 5 of another embodiment of the valve;

9 is a partial cross-sectional view of the valve along line IX-IX of FIG. 2, with the valve spindle rotated within the valve housing corresponding to the position illustrated in FIG.

[Description of Signs] 1 Exhaust valve 2 Main shaft 3 Main shaft guide 4 Valve disk 5 Bottom piece 6 Exhaust valve housing 7, 8 Seating surface 9 Passage 10 Impeller wheel 11 Actuator 12 Housing 13 Hydraulic piston 14 Pneumatic piston 15 Housing 16, 17 Coolant chamber 18 coolant supply conduit 19 coolant discharge conduit 20 spindle seal 21 housing / guide 22 indicator hole 23,24,25,26 radial hole 27 axial hole 28,29,30,
31 passage 32 insert 33 plug 34 cooling passage / annular passage 35,36,37,
38 passage 39 ring 40, 41, 42,
43 quadrants 44,45 radial holes 46,47 passages 48,49 walls 50,51,52,
53 Coolant chamber 54 Cylinder 55, 56, 57
Radial hole

 ──────────────────────────────────────────────────続 き Continuation of the front page (71) Applicant 594140904 Center Sid, 161 Stamholmen, DK-2650 HVIDOVR E, Denmark

Claims (16)

[Claims] A spindle (2), which is axially displaceable and has a valve disc (4) at one end, is provided in a spindle guide (3, 21), said spindle (2) being a disc (2). 4) A valve (1) for an internal combustion engine having at least one coolant passage communicating with a coolant cavity formed in 4), comprising a chamber, wherein at least one of the chambers has a coolant supply port. And at least one of the chambers is in communication with a coolant outlet and the main shaft wall exchanges coolant between the chamber and at least one coolant passage formed in the main shaft (2). A valve for an internal combustion engine having holes (23, 24, 25, 2)
6, 44, 45, 55, 56, 57) are arranged at equal or close to each other in the axial direction of the main shaft (2), and the coolant chambers (16, 17, 50, 51, 5, 5) are provided.
2, 53) are arranged at equal heights in the axial direction and are separated from one another in the circumferential direction of the main shaft (2). 2. The valve (1) according to claim 1, wherein the holes (23, 24, 2) in the spindle wall are arranged in the circumferential direction of the spindle (2).
5, 26, 44, 45, 55, 56, 57)
Two coolant chambers (16, 17; 50, 51, 5)
2, 53), characterized in that they have a length which is shorter than or equal to the length of the walls (48, 49) separating them in the same direction. 3. The valve (1) according to claim 1 or 2, wherein the hole (23,
24, 25, 26, 44, 45, 55, 56, 57), the distance between the coolant chambers (16, 17, 50, 51,
52, 53) wherein the distance in the same direction is shorter. 4. A valve (1) according to any one of claims 1 to 3, wherein the hole (23, 24, 25, 26,
44, 45, 55, 56, 57) are each a separate coolant passage (28, 29, 30, 31, 46, 47) in the main shaft.
A valve characterized by communicating with a valve. 5. The individual coolant passage (28, 29, 30, 31, 46, 47) as a valve (1) according to claim 4.
A single passage (27) extending into the valve disc (4)
Characterized in that they are connected together such that 6. The valve (1) according to claim 1, wherein the main shaft (2) has a single axial coolant hole (27). , All holes (23, 24, 25, 26, 44, 45, 55, 56,
57) is open and the coolant hole extends into a cavity or passage of the valve disc (4). 7. The valve (1) according to claim 6, wherein a hole (2) is provided as a guide plate device, preferably as a guide plate device.
7) and a cylindrical body (54) coaxial with the holes (23, 2).
4, 25, 26, 44, 45, 55, 56, 57) so as to deflect the flow of coolant through the holes (2
3, 24, 25, 26, 44, 45, 55, 56, 5,
7) A valve, characterized in that it is arranged in a coolant hole (27) of the main shaft (2) between 7). 8. The valve (1) according to any one of claims 1 to 7, wherein the hole (23, 24, 25, 26,
44, 45, 55, 56, 57) characterized by a hole having an axis forming an acute angle with the radius of the main shaft (2). 9. The individual coolant passages (28, 29, 30, 31, 46, 47) as in the valve (1) according to claim 4.
Extends to the valve disc (4), wherein the coolant passage communicates with a coolant cavity or passage in the disc (4). 10. The valve (1) according to claim 4, wherein the valve disc (4) has an annular cooling passage (34) following the seating surface (7) of the disc (4). , Separate coolant passages (28, 29, 30,.
31, 46, 47) communicate with the annular passage (34) by passages (35, 36, 37, 38) extending outwardly in the disk (4), and these passages (35, 3, 47).
6, 37, 38) are uniformly spaced in the circumferential direction. 11. The valve (1) according to claim 10, wherein
Four holes (2) uniformly spaced in the circumferential direction of the spindle (2)
3, 24, 25, 26) through the holes (23, 2
4, 25, 26, 44, 45, 55, 56, 57) and coolant chambers (16, 17, 50, 51, 5).
2, 53) are arranged in two chambers (1) arranged substantially diametrically opposite one another with respect to the main axis (2).
6, 17). 12. The valve (1) according to claim 11, wherein
Coolant passages (28, 29, 30, 31,
46, 47) are formed in a shaft hole (27) therein and separated by a long partition member (32), which has a cross-shaped cross-section and whose longitudinal edges have a longitudinal edge. A valve, wherein the valve is inserted into the hole (27) so as to seal against the wall of the hole (27). 13. The valve (1) according to claim 1, wherein the valve disc (4) extends to a region near the seating surface (7) of the disc (4) and the main shaft (2). ) Through all holes (23, 24, 25, 26, 4) in the spindle wall.
4, 45, 55, 56, 57) characterized by having a single continuous cavity in communication with the valve. 14. The valve (1) according to any one of claims 1 to 13, wherein the valve (1) includes, for example, a bucket wheel (10).
A valve, characterized by being provided with means for rotating the valve main shaft (2). 15. Cooling of the valve disc through one or more coolant passages (28, 29, 30, 31, 46, 47) of the valve spindle (2) to cool the valve disc during operation of the engine. 4) and one or more coolant passages (28, 29, 30, 31, 46, 4) in the spindle (2).
7) to be carried from disk (4),
In a method for cooling a valve (1) in an internal combustion engine, individual coolant passages (28, 29, 30, 3) in a main shaft (2) are provided.
1, 46, 47) wherein the coolant flows alternately into and out of the disk (4). 16. The method according to claim 15, wherein the valve (1) is open towards the main shaft (2) and has a limited length in the circumferential direction of the main shaft (2). 16,
17, 50, 51, 52, 53), wherein the main shaft wall is
Coolant passages (28, 29, 30, 31,
Holes (23, 24, 25, 26, 44, 45, 55, 5) which are circumferentially spaced from the main shaft (2) with respect to
6, 57), and coolant is provided from one or more chambers through holes (23, 24, 25, 26, 44, 45, 55, 5).
6, 57) and from the holes to one or more chambers (16, 17, 50, 51, 52, 53) where the holes (23, 24, 25, 26, 44, 45, 5
5, 56, 57) is passed through the chambers (16, 17, 50, 51, 52, 53) by rotation of the main shaft (2).