JPH06331502A - Manifold coupler for internal combustion engine - Google Patents

Abstract

PURPOSE:To realize a suitable coupling by providing an adapter comprising a base flange fixed to the end of a manifold, a bellows, a head flange to be coupled with the manifold, and a stopper, thereby preventing deformation of the manifold. CONSTITUTION:An internal combustion engine 2 to be supported on a test bench has an exhaust section 3 formed by disposing a tubular flange 5 at the tip of an exhaust gas channel, i.e., a tubular body 4, in the internal combustion engine 2. A supporting plate 10 is supported movably up and down by an elevating/lowering cylinder 11 installed on the test bench 1 and a manifold 20 is installed vertically on the supporting plate 10. The manifold 20 is provided rotatably with ring bosses 23A-23C fixed with exhaust pipes 24A-24C. The adapter 30A-30C comprises a base flange 31 fixed at the tip of the exhaust pipe 24A-24C, a bellows 32, a head flange 33, and a stopper 34 for regulating the distance between the flanges 31, 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust pipe of a test apparatus for an exhaust portion of an internal combustion engine when a performance test is performed on the internal combustion engine before it is incorporated into a vehicle body in an automobile assembly factory. The present invention relates to an exhaust pipe connecting device for an internal combustion engine test device used for connecting and disconnecting.

[0002]

2. Description of the Related Art Conventionally, as a device of this type, a structure disclosed in Japanese Utility Model Laid-Open No. 122342/1990 is provided. In this conventional configuration, a base plate that can support an internal combustion engine is provided with a junction for piping, and an exhaust pipe part provided at this junction is provided with a flexible heat-resistant hose whose proximal end is connected. At the tip of the sleeve, an adapter that can communicate with and adsorb to the exhaust portion of the internal combustion engine is provided, and a grip is provided on this adapter.

According to this conventional structure, after the internal combustion engine is placed on the base plate, the adapter can be communicated with the exhaust portion by making the adapter face the exhaust portion and moving the adapter closer. The adapter can be fixed by adsorbing it on the exhaust part. Further, the adapter can be separated by moving the adapter away from each other by a force that overcomes the suction force. Then, during a test in which the internal combustion engine is operated, the exhaust gas generated in the internal combustion engine and discharged from the exhaust section is recovered through the heat resistant hose.

However, according to the above-mentioned conventional structure, the adapter is gradually heated by the heat of the exhaust gas discharged during the test of the internal combustion engine in a state where the adapter is attracted to the exhaust portion by the magnet, and as a result, the magnet is heated. There is a problem in that the attraction force is reduced due to the high temperature demagnetization and the separation work cannot be performed easily and quickly due to the high temperature of the adapter, resulting in poor workability.

In order to solve the problems of adsorption and workability, instead of the heat-resistant hose, an exhaust pipe communicating with the junction is provided so as to face the exhaust portion of the internal combustion engine, and is automatically approached and separated (elevated). A configuration in which it is directly connected to the exhaust portion of the internal combustion engine is conceivable. An example of the configuration of such an exhaust pipe connecting device will be described with reference to FIG.

In FIG. 10, an exhaust pipe 50 guides the exhaust gas discharged from the internal combustion engine 51 to a test bench 52 which can support the internal combustion engine 51, and discharges it to the outside of the test bench 52 via a junction (not shown). It is provided so as to face the exhaust part 53 of the internal combustion engine 51, and is configured to be able to approach and separate. At the tip of the exhaust pipe 50, the exhaust section of the internal combustion engine 51
A ring-shaped flange 54 connecting to 53 is provided. The exhaust portion 53 of the internal combustion engine 51 is formed by providing a tubular flange 56 at the tip of a tubular body 55 that serves as a conduit for exhaust gas within the internal combustion engine 51.

According to this conventional configuration, after the internal combustion engine 51 is mounted on the test bench 52, the exhaust section of the internal combustion engine 51 is placed.
The exhaust pipe 50 (flange 54) is opposed to the 53 (flange 56), and the exhaust pipe 50 is moved closer to the flange 54.
Can be joined to the flange 56 of the exhaust part 53 to communicate the exhaust pipe 50 with the tubular body 55 of the conduit to fix it. Further, the separation of the flange 54 is performed by moving the exhaust pipe 50 apart. Then, during the operation test of the internal combustion engine 51, the exhaust gas generated in the internal combustion engine 51 and discharged from the exhaust unit 53 is recovered via the exhaust pipe 50.

[0008]

However, according to the conventional configuration shown in FIG. 10, during the test of the internal combustion engine 51, the exhaust portion 53 and the exhaust pipe 50 are gradually heated by the heat of the exhaust gas, and as a result, the exhaust gas is exhausted. An expansion difference occurs between the portion 53 and the exhaust pipe 50, and thus the stress of this expansion difference causes deformation of the exhaust pipe 50, resulting in a gap at the connection between the exhaust portion 53 and the exhaust pipe 50 at the next test. There was a problem that exhaust gas leaked and the connection could not be established.

It is an object of the present invention to provide an exhaust pipe connecting device for an internal combustion engine test device, which can prevent deformation of the exhaust pipe during a test of the internal combustion engine and can always perform a preferable connection without causing damage. There is a point to do.

[0010]

In order to achieve the above object, an exhaust pipe connecting device for an internal combustion engine test device according to the present invention is installed on a bench that can support the internal combustion engine, and is connected to an exhaust portion of the internal combustion engine. A pipe connecting device, wherein an adapter provided at the end of the exhaust pipe is connected to a base flange attached to the end of the exhaust pipe, a bellows connected to the base flange, and a free end of the bellows And a stopper body that regulates the distance between the flanges. The stopper body is formed into a tubular shape that is fitted onto the bellows, and is connected to one of the flanges. is doing.

[0011]

According to the above structure, when the adapter is opposed to the exhaust portion and the adapter is moved toward the exhaust portion, the front flange can be fitted and abutted on the exhaust portion, and the bellows is resisted against elasticity, that is, the bellows. After the base flange is moved closer to the front flange while shrinking, the stopper body can be brought into contact with the front flange, so that the exhaust portion and the exhaust pipe can be communicated and fixed. Exhaust gas generated in the internal combustion engine during the operation test and discharged from the exhaust part can be recovered through the exhaust pipe, and the difference in expansion between the exhaust part and the exhaust pipe due to the heat of the exhaust gas at that time is the elasticity of the bellows (spring). It can be absorbed by the effect, and the deformation of the exhaust pipe can be prevented.

Further, when the exhaust pipe is moved closer to and connected to the exhaust portion, if the opposing position is displaced, the exhaust pipe and the exhaust portion are connected by being corrected by the deformation of the bellows, and thus the opposing position is changed. Even if they are displaced, the exhaust gas can be prevented from leaking. Further, since the stopper body has a cylindrical shape, the contact by the stopper body is always suitable regardless of the direction of the displacement, so that the connection by the contact can be made without causing damage to the adapter.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In FIG. 5, the internal combustion engine 2 supported by the test bench 1 has an exhaust part 3, and this exhaust part 3 is
A tubular flange 5 is formed at the tip of a tubular body 4 that serves as a conduit for exhaust gas in the internal combustion engine 2. 10 is a support plate, which is a lifting cylinder 11 installed on the test bench 1.
Is vertically movably supported by, and the collecting pipe 20 is erected on the support plate 11.

As shown in FIGS. 5 and 6, the collecting pipe 20 is composed of three partition pipes 21A, 21B and 21C which are fitted to each other, and these partition pipes 21A, 21B and 21C are used to generate exhaust gas. The room is formed. Each partition tube 21A, 21B, 21
C is provided with communicating passages 22A, 22B, 22C to the outside at different heights and at different phases, and further each partition pipe 21A,
The height of 21B and 21C is extended to near negative pressure.

Further, the collecting pipe 20 has a partition pipe 21 outside thereof.
Three upper and lower ring-shaped bosses 23A, 23B and 23C are horizontally rotatably provided in A and block the communication passages 22A, 22B and 22C. These ring-shaped bosses 23A, 23B, 23
Exhaust pipes 24A, 24B, 24C are fixed to C, and adapters 30A, 30B, 30C are provided at the tips of the exhaust pipes 24A, 24B, 24C.

Pipe lines 25A, 25 of each exhaust pipe 24A, 24B, 24C
B and 25C penetrate through the ring-shaped bosses 23A, 23B and 23C,
It opens on the side of the collecting pipe 20. In addition, ring-shaped bosses 23A, 23
Ring-shaped bosses 23A, 23 are provided at the centers of the outer portions of B, 23C.
The tips of the rods 13A, 13B, 13C of the rotating cylinders 12A, 12B, 12C horizontally installed at the same height as the centers of B, 23C are fixed, and the ring is driven by a predetermined drive of the rotating cylinders 12A, 12B, 12C. The bosses 23A, 23B and 23C rotate,
Pipe lines 25A, 25B, 25C of the exhaust pipes 24A, 24B, 24C communicate with the communication passages 22A, 22B, 22C of the partition pipes 21A, 21B, 21C and the adapters 30A, 30 are connected to the exhaust section 3 of the internal combustion engine 2.
B and 30C face each other.

The adapters 30A, 30B and 30C are shown in FIG.
As shown in FIG. 2, a base flange 31 attached to the tips of the exhaust pipes 24A, 24B, and 24C, a bellows 32 connected to the base flange 31, and a free end of the bellows 32 and connected to the exhaust unit 3. It is composed of a freely connectable front flange 33 and a stopper body 34 that regulates the distance between the flanges 31 and 33.

The base flange 31 has a through hole 35 in the center thereof and recesses 36 at a plurality of outer edges. The bolts and nuts 37 acting on the recesses 36 are detachably attached to the tips of the exhaust pipes 24A, 24B, 24C. The bellows 32 is a molded bellows having a corrugated cross section, and its base end is connected to the base flange 31 by welding. At this time, the bellows 32 communicates with the through hole 35.

The front flange 33 is a disc-shaped member that can be fitted in the tubular flange 5 and has a through hole in the center thereof.
Has 38. Then, the bellows 32 is attached to the front flange 33.
The ends of are connected by welding, and at that time, the bellows 32
Communicate with the through hole 38. Further, the stopper body 34 is formed in a tubular shape to be fitted onto the bellows 32, and is connected to the base flange 31 (or the front flange 33) by welding. The exhaust pipes 24A, 24B, 24C and the adapters 30A, 30B, 30C have different shapes according to the type of the internal combustion engine 2.

FIG. 7 shows a lifting cylinder 11 and a rotating cylinder.
12 and the control configuration of the control device 40 for these cylinders 11, 12. The control device 40 is provided with an operation panel 41. The operation panel 41 is provided with a setting switch 42 for the type of the internal combustion engine 2, an exhaust pipe connection switch 43, and an exhaust pipe separation switch 44. 42, 43, 44 are connected to the control device 40. The control device 40 is composed of a microcomputer, and stores adapters 30A, 30B, 30C that match the type of the internal combustion engine 2 in advance. The adapters 30A, 30B, 30C are connected to the adapters 30A, 30B, 30C and the internal combustion engine 2 respectively. The height data for raising the support plate 10 for connection is stored.

The operation of the above embodiment will be described below.
First, after supporting the internal combustion engine 2 on the test bench 3, the type of the internal combustion engine 2 is set by the setting switch 42, and the exhaust pipe connection switch 43 is operated. By this setting and operation, the control device 40 causes the turning cylinders 12A, 12B, 12C to move.
One of them is selected and driven, and the adapters 30A, 30B, 30C corresponding to the exhaust portion 3 of the internal combustion engine 2 are swung to communicate with the partition pipes 21A, 21B, 21C, and the lifting cylinder 11 is moved. Driven and selected adapter 30A, 30B, 30C
By moving the adapter closer, this adapter 30A, 30B, 30C
Is communicated with and fixed to the exhaust unit 3.

The separation of the adapters 30A, 30B, 30C is
By operating the exhaust pipe separation switch 44, the control device
The lifting cylinder 11 is reversely driven by 40, and the rotating cylinders 12A, 12B and 12C are selected and reversely driven.

When connecting the adapters 30A, 30B, 30C to the exhaust part 3 of the internal combustion engine 2 described above, the adapters 30A, 30B, 30 are attached to the flange 5 of the exhaust part 3 as shown in FIG.
C is made to face, and adapters 30A, 30B, 30C are moved closer. Then, first, the front flange 33 is fitted into and abuts the flange 5, and then the base flange 31 moves closer to the front flange 33 against the elasticity of the bellows 32, that is, while the bellows 32 is contracted. As shown in, the stopper body 34 can be brought into contact with the front flange 33.

As a result, the exhaust pipes 24A, 24B, 24C can be communicated with the exhaust unit 3 and can be fixed to the exhaust unit 3. The adapters 30A, 30B and 30C are separated from each other by moving them away from the flange 5. At that time, the bellows 32 is automatically elastically restored.

In this way, the adapter for the internal combustion engine 2
With the 30A, 30B, and 30C connected, the internal combustion engine 2 is operated to start the desired test. During the test in which the internal combustion engine 2 is operated, the exhaust gas generated in the internal combustion engine 2 and discharged from the exhaust unit 3 is fixed to the adapters 30A, 30B and 30C, the exhaust pipes 24A, 24B and 24C, and the pipeline 25A, 25B, 25C, communication passage
It is recovered through 25A, 25B, 25C and partition tubes 21A, 21B, 21C. At this time, the other adapters 30A, 30B, 30C are not in communication with the partition tubes 21A, 21B, 21C, and the exhaust gas does not leak.

At this time, the exhaust part 3 and the exhaust pipes 24A, 24B, 24C are gradually heated by the heat of the exhaust gas, but the expansion difference between the exhaust part 3 and the exhaust pipes 24A, 24B, 24C due to the heating is the bellows 32. Since it is absorbed by the elasticity (spring) effect of the exhaust pipes 24A, 24B, 24
The deformation of C is prevented.

Further, when the exhaust pipes 24A, 24B and 24C are moved toward each other and connected to the exhaust portion 3, if the opposing positions are displaced, as shown in FIG. 4, the exhaust pipes 24A, 24B and 24C are shown.
And the exhaust part 3 are connected by being corrected by the deformation of the bellows 32, so that the exhaust gas is prevented from leaking even when the facing position is displaced. Even when the operation test of the internal combustion engine 2 is performed in such a state, the expansion difference between the exhaust pipes 24A, 24B, 24C and the exhaust portion 3 is absorbed by the spring effect of the bellows 32, and
The deformation of 24A, 24B and 24C is prevented.

Further, since the stopper body 34 is tubular, the stopper body 34 is always in contact with the stopper body 34 regardless of the direction of the displacement, so that the connection by contacting the adapter bodies 30A and 30B. , 30C can be done without causing damage.

As described above, the adapter 30 including the bellows 32 and the stopper body 34 is provided at the tips of the exhaust pipes 24A, 24B and 24C.
By providing A, 30B, and 30C, it is possible to prevent the exhaust pipes 24A, 24B, and 24C from being deformed by the heat of the exhaust gas due to the operation of the internal combustion engine 2, and to solve the problem that the exhaust gas does not leak or cannot be connected. .

Further, the exhaust pipes 24A, 24B, 24C and the exhaust unit 3
It is possible to prevent the exhaust gas from leaking even when the opposed positions of the two are displaced. Furthermore, the exhaust pipes 24A, 24B, and 24C are automatically approached and separated from each other, so that the worker can perform the separation work without spending time because of the high temperature. With the cylindrical stopper body 34, it is possible to always perform a suitable connection regardless of the direction of the displacement.

In the above embodiment, the three exhaust pipes 24A, 24A
Although the type in which B and 24C are provided so as to be rotatable and vertically movable is shown, this may be a type in which one exhaust pipe is vertically movable. By forming the bellows 32 with a molded bellows having a corrugated cross section, it is possible to expect a suitable restoration property for a long period of time.

8 and 9 show another embodiment of the present invention.
That is, the adapters 30A, 30B, 30C are formed by forming the bellows 32, the stopper body 34, and the through holes 35, 38 in double (plural), respectively, and have the exhaust portion 3 in double.
Can correspond to.

[0033]

According to the present invention having the above-described structure, the exhaust pipe and the exhaust pipe are connected and fixed by causing the exhaust pipe adapter to face the exhaust pipe of the internal combustion engine and moving the adapter closer to the exhaust pipe to connect the adapter to the exhaust pipe. The exhaust gas generated in the internal combustion engine and discharged from the exhaust portion can be recovered through the exhaust pipe during the operation test. At that time, the expansion difference between the exhaust part and the exhaust pipe due to the heat of the exhaust gas can be absorbed by the elasticity (spring) effect of the bellows, and the deformation of the exhaust pipe due to the stress of the expansion difference can be prevented, thus connecting the exhaust pipe to the exhaust part. Can always be suitably performed without causing leakage of exhaust gas due to the clearance.

Further, the deviation generated at the opposed position between the exhaust pipe and the exhaust portion can be corrected by the deformation of the bellows, and therefore, even if the opposed position is displaced, the exhaust gas can be leak-freely connected. Further, the contact by the cylindrical stopper body can always be suitably performed regardless of the displacement, and the connection by the contact can be performed without causing damage to the adapter.

[Brief description of drawings]

FIG. 1 is a partially longitudinal front view of an exhaust pipe connecting device of an internal combustion engine testing device in a separated state of a connecting portion according to an embodiment of the present invention.

FIG. 2 is a plan view of an adapter of the exhaust pipe connecting device.

FIG. 3 is a partially longitudinal front view of the exhaust pipe connecting device in a connected state of a connecting portion.

FIG. 4 is a partially longitudinal front view of the exhaust pipe connecting device in a connected state of a connecting portion.

FIG. 5 is a front view of a test bench including the exhaust pipe connecting device.

FIG. 6 is a longitudinal sectional view of a collecting pipe of the exhaust pipe connecting device.

FIG. 7 is a control configuration diagram of the exhaust pipe connecting device.

FIG. 8 shows another embodiment of the present invention and is a partially longitudinal front view of an adapter of an exhaust pipe connecting device of an internal combustion engine test device.

FIG. 9 is a plan view of an adapter of the exhaust pipe connecting device.

FIG. 10 is a schematic diagram of a test bench including an exhaust pipe connecting device of a conventional internal combustion engine test device.

[Explanation of symbols]

 1 Test Bench 2 Internal Combustion Engine 3 Exhaust Section 5 Flange 10 Support Plate 11 Lifting Cylinder 12A Rotating Cylinder 12A Rotating Cylinder 12B Rotating Cylinder 12C Rotating Cylinder 20 Collecting Pipe 21A Dividing Pipe 21B Dividing Pipe 21C Dividing Pipe 23A Ring Boss 23B Ring Boss 23C ring-shaped boss 24A exhaust pipe 24B exhaust pipe 24C exhaust pipe 30A adapter 30B adapter 30C adapter 31 base flange 32 bellows 33 front flange 34 stopper body 35 through hole 38 through hole 40 control device

Claims (1)

[Claims] 1. An exhaust pipe connecting device, which is installed on a bench capable of supporting an internal combustion engine and is connected to an exhaust portion of the internal combustion engine, wherein an adapter provided at a tip of the exhaust pipe is provided at a tip of the exhaust pipe. It is composed of a mounted base flange, a bellows connected to the base flange, a front flange connected to the free end of the bellows and connectable to the exhaust part, and a stopper body that regulates the distance between the flanges. An exhaust pipe connecting device for an internal combustion engine testing device, characterized in that the stopper body is formed in a cylindrical shape to be fitted onto the bellows and is connected to one of the flanges.