JPS58190521A - Supercharge pressure controller - Google Patents

Abstract

PURPOSE:To suppress the power loss by providing margin between a link mechanism for transmitting the motion of an actuator corresponding to the delivery pressure of a compressor and said actuator thereby opening said valve at proper time. CONSTITUTION:A turbo supercharger S is constructed with a turbine T having a turbine vane 9 to be rotated by the exhaust gas from an engine 1 and a compressor C having a compressor vane 8 to be rotated by said vane 9 where a waste gate 19 is detouring around the turbine T. A waste gate valve V is placed in said gate 19 and opened/closed by an actuator Ac including a belows 41 through a link mechanism L in accordance to the compressed air pressure. A gap is provided between an operating rod 42 at the belows 41 side and an operating rod 45 at the link mechanism L side and when the supercharge pressure reaches to predetermined level, both rods 42, 45 will contact to open said valve V.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nine-way turbo supercharger for increasing engine output in motorbikes, etc.
The present invention relates to a boost pressure control device that controls the rotation speed of a turbine based on discharge pressure.

It is well known that nine motorcycles are equipped with an engine equipped with a turbo supercharger to increase the output. In addition, it is known that a wastegate pulp is provided in the wastegate that bypasses the turbine in the exhaust passage, and a part of the engine exhaust flow is released to the wastegate by controlling the opening and closing of the wrinkle stretcher.

First, such a boost pressure control device is shown in Figures 1 and 2!
I will explain from 1IIK.

The engine Eld mounted on the car body 7 rays 5F, 2 cylinders 2.2 are formed in the engine body 1, 9 r 112 cylinders 11
It is formed in front of the engine body 1, and the turbo supercharger 51 is behind the air cleaner jTh and the exhaust! 7M will be installed. Thus, the supercharger S is supported on an exhaust manifold 17, which will be described later, and which is connected to the front of the engine body.

In FIG. 2, the turbo supercharger S includes a compressor C interposed in the middle of the intake passage 3 that connects each intake boat 2m and 2g of the cylinder 2.2 and the air cleaner 7,
Each exhaust bow of cylinders 2 and 2) 2A.

2h and a turbine T interposed in the middle of the exhaust passage 4 connecting between the exhaust gas 1721 and the compressor blade ma housed in the housing 6 of the compressor C.
and the turbine impeller 9 housed in the turbine TO housing 7 are directly connected to each other by a rotating shaft 10, and the rotating shaft 10#i is connected to a bearing housing 11 installed between both housings 6.7 via a bearing 12.13. will be supported.

Intake passage 3KFi fuel injection nozzle 14 is located in each intake port)
21! The throttle valve 1 is installed on the upstream side of the
5 is installed, and a filler chamber 16 formed by enlarging the cross-sectional area of a part of the intake passage 3 is installed upstream of the throttle valve 15.

In the exhaust passage 4, the part from 2h to the turbine TO population to each exhaust port 2 is constituted by an exhaust manifold 17 having two branch pipes 17 @ $ 178 connected to each exhaust port 2 for 2hK, and further A flexible portion, that is, a bellows-shaped flexible tube 18, 18, which allows relative movement of 1.0 ml, is interposed during the passage of each branch pipe 17g, 17g0. The exhaust manifold 17t) At least the outer periphery of the flexible tube 18.18 is supported by a cylindrical cover CE supported via a bracket (not shown) and a central cover on the front 11 of the engine body 1.
(not shown) is coated with K and serves as a trap to avoid interference with obstacles. The turbo supercharger S is directly supported on the exhaust manifold 17.

A wastegate 19 that bypasses the turbine T is connected to the exhaust passage 4, and a wastegate 1 pulp r is provided in the middle of the wastegate 190. By controlling the opening and closing of this wastegate pulp r, a part of the exhaust flow of the engine E is released to the wastegate 19, thereby adjusting the turbine TO driving pressure and controlling its one rotation. One end of the #i pressure detection tube 20 is connected to the outlet of the compressor C, and the other end of the pressure detection tube 20 is connected to the input end of the actuator AC. The output end of the actuator 4C is connected to a length-adjustable operating rod 21, and the other end of this operating rod 21 is pin-connected 23 to an arm 22 fixed to the valve shaft 24 of the wastegate pulp V. There is.

Thus, the operating rod 21 and the arm body 22 constitute a link mechanism.

When the discharge pressure of the compressor C is below a certain value, that is, when its rotation speed is within the normal rotation speed range, the discharge pressure acts on the actuator AC and the wastegate pulp r closes without operating. When the discharge pressure of compressor C rises above a certain value, that is, when its rotation speed exceeds the scheduled rotation speed, the discharge pressure also rises and actuator AC is activated. Move the operating rod 21 upward as shown in Fig. 2, and lower the arm body 2.
The wastegate pulp V can be opened via the turbine T1 or the compressor C as described above.
The rotation can be reduced.

However, in such a boost pressure control device,
Since the actuator IC and the operating rod 21 are directly connected, open the wastegate pulp r and remove the wastegate 1.
! Before reaching the supercharging pressure at which the exhaust flow should be released, the waste gate pulp r opens slightly and the exhaust flow is released into the exhaust passage 4, and the energy of the exhaust flow that rotates the turbine T is wasted.

The present invention eliminates such inconveniences in the conventional book, and opens the wastegate O wastegate F pulp for the first time when a predetermined boost pressure is reached, eliminating waste of exhaust energy. This device was developed for the purpose of providing a supercharging pressure control device, and consists of a pressure-responsive member, that is, a bellows, of an actuator, into which the discharge pressure of the compressor is introduced, and a bellows, which rotates as the bellows expands to control the wastegate pulp. Between the arm of the opening link mechanism and the bellows, the internal pressure causes the bellows to reach a predetermined thickness.
A play is provided to prevent extension from being transmitted to the arm body.

The present invention will be explained below with reference to embodiments shown in the drawings.

FIG. 3 shows a first embodiment of the present invention, and the inside of the actuator AC includes a large-diameter first chamber 30, a small-diameter second chamber 31 connected to this first chamber, and this second chamber. It consists of a third chamber 32 which is connected to the chamber 31 and has the same diameter as the second chamber. Then, the end wall 5 of the first chamber 30 and the second chamber 31
partition wall 34, partition wall 35 of the second chamber 31 and third chamber 32,
The end wall 36 of the third chamber has central holes 57.3B and 59, respectively.
．． 40 are drilled.

A bellows 41 is disposed in the first chamber 30),
The inside of this bellows 41 is located at the center hole 37 of the end wall 33.
The other end of the pressure detection tube 20 is connected to the compressor C shown in FIG. 2. An operating rod 42 is bored in the end surface of the bellows 41, and the tip of the operating rod 42 is attached to the partition wall 34.
It passes through the center hole 3B and reaches the inside of the second chamber 31. A compression coil spring 45 is interposed between the end face of the bellows 41 and the partition wall 54.
It is energized so that it contracts.

t) ft, the operating rod 4 located in the second *S 1
A 7 flange 44 having a larger diameter than the center hole 38 is provided at the tip of the 2.
Sand is provided around the tip of the operating rod 42, No. 21115.
The removal from 1 plays the role of a stopper.

On the other hand, the arms 22 and II which control the opening and closing of the waste gate shown in FIG. ! The operating rod 45 passes through the center hole 40 of the end wall 36 and faces into the third opening 32, and the tip of the operating rod 45 located inside the third opening 32 has the above-mentioned space *SSO. Seven flanges 46 having a larger diameter than the center hole 39 are provided around the periphery. Further, a compression coil spring 411 is interposed between the seven flange 46 and the end wall s6 to press the flange 44 into contact with the partition wall 35. At this time, the Wastegate Pulp Company is closed, and the tip of the operating rod 45 passes through the center hole s9 and faces into the second chamber 31.

When the supercharging pressure, that is, the combretner O discharge pressure is not supplied into the baize 42, the tip surfaces of the operating rods 42 and 45 are as shown in the figure.
They face each other at certain intervals. This interval is set in consideration of the state of expansion (expansion) of the bellows 41 due to the discharge pressure of the compressor, and is set so that the operating rod 42 presses the operating rod 45 when the discharge pressure reaches the point at which the exhaust volume should be removed from the wastegate. ing.

According to the above-described configuration, when the discharge pressure of the compressor is supplied to the bellows 41JC via the pressure detection tube 20, the bellows 41 expands and increases its thickness, and the operating rod 42 moves against the spring 43 to the left in the figure. move in the direction of However, since there is the above-mentioned interval between the front end faces of the two moving rods 42, 45, the movement of the operating rod 42 does not affect the operating rod 45 as long as the discharge pressure of the compressor is small. Therefore, the wastegate valve remains closed most of the time, and the energy of the exhaust flow is not wasted. Then, when the discharge pressure of the compressor exceeds a certain level, the operating rod 42 changes to the operating rod 4.
Press and close 5 to open the wastegate valve, allowing a portion of the exhaust flow to escape into the exhaust passage through the wastegate. Therefore, the output pressure of the compressor exceeding a predetermined level ot1 is not introduced into the cylinder, and the durability of the cylinder is not adversely affected.

Note that when the discharge pressure of the compressor decreases, the bellows 41
contracts, and the spring 45 causes the operating rod 42 to move to the right in the figure. Then, due to the action of the spring 47, the operating rod 45 also moves to the right, moving in the direction of closing the wastegate pulp as shown in FIG. The arm body 22 is rotated. Then, when the compressor discharge pressure decreases enough to cause the operating rods 42, 45 to move apart, the wastegate pulp closes completely, preventing exhaust flow from exiting the wastegate.

The 4th m shows the second embodiment of the present invention, and shows the WCS
The spring in the first chamber 3o in the illustrated embodiment is omitted, and instead a compression coil spring 48 is interposed between the partition wall 35 in the second chamber 31 and the flange 44 of the operating rod 4207.

Even with such a configuration, the same effects as the embodiment shown in FIG. 83 can be obtained.

FIGS. 5A and 5E are books showing a third embodiment of the present invention,
The coil spring 47 of the operating rod 45 in both the embodiments of FIGS. 3 and 4 is omitted, and the wastegate valve V is replaced instead.
A helical spring 49 is attached to the arm body 22 of the arm 22 for returning the 1-operating rod 45, that is, urging the waste gate pulp 5 in the closing direction.
It has been established.

That is, the valve shaft 24, which rotates to open and close the valve body 50 of the wastegate upper pulp r that is protected against snow inside the wastegate 19, is rotatably supported by a boss 52 protruding from the peripheral wall 51 of the wastegate 19. The tip is the boss 52
protrudes outward from the An arm body 22 is fitted to the tip of the valve shaft 24, and the arm body 22 is attached to the boss 52.
The helical spring 49 has one end hooked on the side surface of the spring 2, and the other end protrudes from the peripheral wall 51 and hooks on the nine stopper 55.
is wound. This helical spring 49 biases the arm body 22 in the counterclockwise direction in FIG. 5B, and therefore can be said to have the same effect as the coil spring 47 in the eleventh embodiment described above.

Therefore, in this embodiment, the above-mentioned 1. The same effects as in the second embodiment can be achieved.

A diaphragm 54 is stretched inside the second *51, and this diaphragm 54 is connected to the tip of the operating rod 450. Therefore, when air leaks from the bellows 41, this air reaches the second wealth 51 from the first book sO via the seven flange 44 of the one-way valve function, presses the diaphragm 54, and moves the operating rod 45 to the left in FIG. 5B. This acts to move the arm body 22 clockwise to close the waist valve r. By the way, this second room s
The air that leaked into 1 is a circle that cannot escape from here,
Continuing to press the diamond 72^54, a certain strike pulp r maintains an open state regardless of the value of the compressuna's discharge pressure.

4th @A and B show the 4th embodiment of the present invention)
,'% shows a modification of the embodiment of the fifth saC4,@.

That is, according to the example of the fifth @ (to), (to),
Figure 5, 41ilO'P4 As in the example, the operating rod 42
Although a gap of 45 degrees was provided between the end surfaces to provide play, in this embodiment, a long hole 55 is provided in the arm body 22 to provide play. To explain this in detail, the structure of the actuator AC is similar to that shown in FIG. Reaching outside. In the front, the pressure detection tube 20 communicates with the interior of the bellows 41 via another central hole 58 of the chamber 56. Furthermore, a compression coil spring 60 is interposed between the end face of the first bellows 41 and the wall 59 of the chamber 56. A bottle 61, which is protruded from the distal end of the operating rod 21, is slidably fitted into the elongated hole 55 formed in the arm body 22 in the moving direction of the operating rod 21.

According to such a configuration, even if the bellows 41 expands due to the discharge pressure of the compressor and the operating rod 21 moves to the left in FIG. While moving from the right end to the left end of the hole 55, the arm body 22 does not rotate, and the waste gate pulp V remains closed.
By appropriately selecting the length of the elongated hole 550, the waste gate pulp r can be opened only when the discharge pressure of the compress 10 reaches a predetermined pressure.

Note that the middle portion l of the operating rod 210 is divided into two operating rods 21g and 21j as shown in FIG.
14. The end of 21j has a threaded part 626°62hf,
These threaded parts 621L, 62kK adjustment nut 63, and p-nut nuts 64m, 64k are screwed together, and both moving rods 2
If the distance between the end faces of 1g and 21A can be adjusted, the minimum discharge pressure of the compressor that opens the waste gate pulp r can be made variable.

Figure 7 n, (A, n is Figure 6 C4, (ato actual mfl
This is a modified example of the elongated hole 55 of the nine-armed body 22. The 711th (40th) example is a modification of the elongated hole 55 of the nine-armed body 22. The arm body 2
An adjustment bolt 66 is screwed onto this plate 65, the tip of which is inserted into the elongated hole 55, and the adjustment bolt 66 can be fixed with a lock nut 67.

According to such a configuration, the elongated hole 5 of the adjustment bolt 66
In addition to adjusting the length of the projection into the inside of the compressor, the minimum discharge pressure of the compressor that opens the waste gate valve V can be varied.

In addition to the configuration shown in FIG. 7 (Kunonosha, Inc.), a coil spring 68 is provided in the elongated hole 55 to bias the arm body 22 counterclockwise so as to close the waste gate valve V. This is arranged in place of the helical spring 490 in FIG.

The spring force of this coil spring 68 is reduced by the spring force of the coil spring 60 in the actuator AC in FIG. 6(B), and the total length of the spring 68 is made longer than the length of the elongated hole 55. . Note that there is a spring seat 6 at the tip of the barb 68.
9 is installed.

When the coil spring 68 is installed in this manner, the spring force of the spring 68 decreases as the operating rod 21 moves to the left of the elongated hole 55.

Furthermore, the one shown in Fig. 7 (1) has the adjustment bolt 66 and lock nut 67 installed at the left end of the elongated hole, and the minimum discharge pressure of the compressor that opens the waste gate valve V can be varied as shown in Fig. 7 (1). Same as 4°(8).

lIp, Figures 8 through 10 are variations of the embodiment shown in Figure 5 described above, and the one in Figure 8 is the third chamber 5.
The second end seat 36 is provided on a sleeve 70 having a female thread 71, and this sleeve 7o is hinged to a male thread 72 threaded on the outer periphery of the fifth chamber 32 of the actuator AC.

Therefore, the male thread 7 of the female thread 71 of the sleeve 7o
By adjusting the threading length of the coil spring 47 and fixing the sleeve 7o with the lock nut 75, the length of the coil spring 47 can be adjusted. The spring force can be adjusted.

In addition, in the case of FIG. 9, the first chamber 3o is replaced by the second chamber 31, and the third chamber
A female screw 74 screwed into the inner periphery of the first chamber 3o, separated from the chamber 32, is screwed into a male screw 75 screwed into the outer periphery of the second chamber 31.

Therefore, as in the embodiment shown in FIG. 8, by changing the length of the female thread 74 and the male thread 75,
Since the length of the coil spring 45 can be made variable, the minimum discharge pressure of the compressor that causes the waste gate valve VtWJ can be made variable by adjusting the spring force of the coil spring 45. In addition, the one in Figure 8! Of course, it is also possible to combine the one shown in FIG.

Furthermore, the M10 figure G model has an IJ-17 that separates the first chamber 30 and the third chamber 32 and protrudes from the compartment 30.52.
The length of the second chamber 51 is made variable by adjusting the screwing length of both screws 79 and 80 by fully screwing male threads L, 79, #L, and 80 on both screws 79 and 78. Further, in this embodiment, a male screw 81 is screwed onto the tip of the operating rod 42, and a Vi adjustment nut 82 and a lock nut 83 are screwed into the male screw 81 within the second chamber 31.

According to such a configuration, by adjusting the protrusion length of the actuating rod 42 into the second chamber 51 and the length of the second chamber 31 itself using the adjustment nut 83, the end face of the actuating rod 42, 45 can be adjusted. The interval between them can be made variable, and the minimum discharge pressure of the compressor that opens the wastegate valve V can be made variable.

The one shown in FIG. 11 is a modification of the embodiment shown in FIG. 10, and like the embodiment shown in FIG.
The coil spring 48 is connected through the coil spring 48. Even in this case, the same effects as in FIG. 10 can be achieved.

The one shown in FIG. 12 is a modification of the embodiment shown in FIG. is urged in the direction of the bellows 41, and the elongated hole 55 of the arm body 22 in FIGS. 6(, 4) and (B) is omitted. Among these, the coil spring 6o is a spring for setting the lowest discharge pressure of the compressor, and the ninth coil spring 86 is a spring that biases the wastegate valve V in the closing direction.

Therefore, when the discharge pressure of the compressor does not act on the bellows 41, a gap is formed between the end faces of the bellows 41 and the operating rod 21, and the discharge pressure of the compressor does not rise to a predetermined pressure, as in each of the above-described embodiments. The waste gate valve V will not open as long as possible.

The embodiment shown in FIG. 13 (4) is a modification of the embodiment shown in FIG. 12, in which the spring force of the coil spring 60°86 in the embodiment shown in FIG. 12 is made variable.

That is, the actuator IC is divided into two parts, and the length of the chamber 56 is made variable by screwing together the male thread 89 of the first sleeve 88 and the female thread 91 of the second sleeve 90, and the spring force of the coil spring 60 is made variable. It is K so that it can be adjusted. The spring force of the coil spring 86 is controlled by an adjusting nut 93 attached to a male screw 92 screwed onto the end of the operating rod 21. By screwing the lock nut 94 through the spring seat 95 and adjusting its position, adjustment can be made by K.

In addition, instead of the above-mentioned barb nut 93 and lock nut 94, the operating rod 21 is divided into two parts as shown in FIG. You can do it like this.

As explained above, the boost pressure control amount according to the present invention is as follows:
A bellows is connected between the actuator, into which the discharge pressure of the compressor is introduced, and the arm of the link mechanism, which moves (by extension of this bellows) and opens the wastegate pulp. until it reaches a predetermined thickness (due to internal pressure).
Since we have provided a play that does not transmit this extension of the bellows to the arm body, the wastegate pulp of the wastegate will not open until the boost pressure has increased to a predetermined pressure. Therefore, the energy of the exhaust flow will not be released in vain. It has an excellent effect of not being stored away.

In addition, the main issue 1! A friend explains various examples for
Of course, the present invention also includes the possibility of combining these embodiments with each other, or of using a tire-shaped piston or the like in place of the bellows.

[Brief explanation of the drawing]

$111■ An explanatory diagram of a motorcycle equipped with a HIRO turbo supercharger, #I21a is a new II diagram showing details of the 0-term supercharger, and FIGS. Actuator OW FIG. 6 (B) is a cross-sectional view of the structure with an actuator added thereto, and FIG.
8) is 11j, Figure 6 (3) is a sectional view with the K actuator added, Figure 6 (0 is an explanatory diagram showing a modification of Figure 6, Figure 7 is 4, (Z?), na, respectively). An explanatory diagram of the arm body showing other modified examples of FIG. 6 (b), FIGS. Cross-sectional view of an actuator showing an example of
FIG. 13(B) is an explanatory diagram showing a modification of FIG. 13(A). 2...Cylinder, 3...Intake passage, 4--Exhaust passage, 1
6...Brichamba, 19...Westgate, 2
o...Pressure detection tube, 21...Operating rod, 22...Arm body, 41...Heath, 42-45...Operating rod, S
...turbocharger, T--bin, C--compressor, IC... actuator, L... link mechanism. Applicant Honda Motor Co., Ltd. Agent Patent Attorney Watanabe Kuwa Hikoken 3 Figure 4 Figure ΔC 304] Figure 8 Procedural Amendment (Voluntary) 2. Title of Invention Supercharging Pressure Control Device 3, Amendment Relationship with Shajiji (Patent applicant address: 6-27-8 Jingumae, Shibuya-ku, Tokyo Name (5)
32) Honda Motor Co., Ltd. Representative Kawa
Yoshiyoshi Shima 4, Agent address: Sunshine Koken Plaza 301, 3-2-4 Higashiikebukuro, Toshima-ku, Tokyo Detailed description of the invention and drawing 6 in the specification, Contents of amendment (1) Specification No. 6 of the present application On the fifth line of the page, the phrase ``Wastegate valve V is activated before the valve is reached'' has been changed to ``The wastegate valve V is activated due to reasons such as the bellows of the actuator following the pressure pulsations in the suction pipe before the valve reaches the valve.'' correct. (2) Page 8, lines 15 to 16 r It opens to the atmosphere through the gap between the partition walls 35, the chamber 32, and the hole 40, and when the bellows 4 expands, the chamber 30. The air inside the actuator AC is released to the outside of the actuator AC so as not to affect the movement of the actuating rod 45. ” is corrected. (3) In the fourth line of page 12, the statement ``is stretched,'' is corrected to ``If the flange 44 is provided with a one-way valve function by being stretched.'' (4) Delete the phrase "Therefore," in the fifth line of the same page. (5) Delete "one-way valve function" in line 7 of the same page. (6) On the 11th line of the same page, correct the word ``By the way'' to ``And''. (7) On page 15, line 13, "total length" is corrected to "free length." (8) Figures 3, 4, 5 (B), 8, 9, 10, and 11 of the nine drawings attached to the specification of the present application.
Correct the figure as shown in the attached sheet. Fist 3 figure Reed 4 figure ΔC 3041 Figure 5 CB) 1*2 jUb+ 乍8 figure Meat 9 figure c

Claims (1)

[Claims] 1. Provide a wastegate through which the exhaust flow bypasses the turbine of the turbocharger and is guided to the exhaust passage, and connect the wastegate pulp inserted in this wastegate to an actuator via a link mechanism, In the supercharging pressure control device, the wastegate pulp is controlled to open and close based on the discharge pressure of a compressor of a turbocharger introduced into the turbocharger, in which the discharge pressure of the compressor is introduced by a response of a pressure-responsive member of the actuator to which the discharge pressure of the compressor is introduced. The sliding mechanism for opening the wastegate pulp is provided with a play that does not transmit the movement of the pressure-responsive member to the wastegate pulp until the pressure-responsive member reaches a predetermined amount of movement due to an increase in its internal pressure. A supercharging pressure control device characterized by: