JP2012202845A - Exhaust gas suction device for vehicle to be tested - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact exhaust gas suction device for vehicle to be tested that can eliminates exhaust gas leaking from between a muffler and a hopper, and easily conduct a test in a convenient place.SOLUTION: The exhaust gas suction device for vehicle to be tested includes an exhaust gas lead pipe 11, an exhaustion part 12 provided on one end side of the exhaust gas led pipe 11, and a cylindrical suction hopper 13 provided on the other end side of the exhaust gas lead pipe 11, and sucks an exhaust gas while arranging the suction hopper 13 opposite to a muffler 16 of a vehicle 15 to be tested. A cut 17 for protruding a part of the body of the vehicle 15 to be tested is made in an upper surface part side of the suction hopper 13 obliquely downward from the side of the exhaust gas lead pipe 11 to the side of a tip opening 13.

Description

  The present invention relates to an exhaust gas suction device for a vehicle under test, and more particularly to an exhaust gas suction device for a vehicle under test that sucks engine exhaust gas of a vehicle under test to be tested by driving the engine indoors etc. It is about.

  Conventionally, as a method for driving a vehicle engine such as an automobile indoors and performing a test, there are a running test performed on a chassis dynamometer, a vehicle exhaust gas measurement test, and the like. When such a test is performed, the engine exhaust gas below the engine exhaust gas, which is simply referred to as “exhaust gas”, is exhausted. If this exhaust gas fills the room, there is a danger to the human body. is there.

  Accordingly, various devices for sucking the exhaust gas from the vehicle under test and leading it to the outside have been proposed, and can be known from, for example, Patent Document 1, Patent Document 2, and the like.

  The test apparatus known from Patent Document 1 is provided with a jet device that forms a flow of air by jetting wind at one end of a chassis dynamometer that performs a running test of a vehicle, and wind from the flow device at the other end. And a suction device for simultaneously sucking the exhaust gas from the vehicle, and forcibly sucking the exhaust gas on the wind flow.

  In the test apparatus known from Patent Document 2, an attachment is attached to a muffler of a vehicle in advance, and in the test chamber, the vehicle-side attachment is connected to an attachment of an exhaust gas outlet pipe provided on the test chamber side. A derivation route is secured.

  However, each of the devices disclosed in Patent Document 1 and Patent Document 2 is a large-scale device, and the installation position is fixed, so that there is a disadvantage that the test cannot be performed at a free position. Further, in the case of Patent Document 2, since the structure is such that the muffler and the exhaust gas outlet pipe are directly connected, the test may be affected.

  Therefore, as an exhaust gas suction device for a vehicle under test that can be tested in a small and convenient free place, as shown in FIG. 5, for example, an exhaust gas outlet pipe 51 and one end side of the exhaust gas outlet pipe 51 And a cylindrical intake hopper 53 provided on the other end side of the exhaust gas outlet pipe 51, and the intake hopper 53 is disposed opposite to the muffler 55 of the vehicle under test 54 that simulates traveling. An exhaust gas suction device for a vehicle under test 50 that sucks exhaust gas discharged through the muffler through an intake hopper and discharges the exhaust gas to the outside or the like is known.

JP 2000-28494 A. JP-A-2005-321337.

  However, in the conventional exhaust gas suction device 50 for a vehicle under test, the intake hopper 53 is formed in a complete cylindrical shape. Therefore, as shown in FIG. 5, when the intake hopper 53 is brought close to the muffler 55, the muffler 55 is located at the lower rear part of the vehicle body, so that the upper tip portion of the intake hopper 53 is the vehicle body including the bumper of the vehicle under test 54. Interfering with a part, the intake hopper 53 cannot be moved to the vicinity of the muffler 55 and installed. For this reason, there has been a problem that exhaust gas easily leaks between the muffler 55 and the intake hopper 53 and the leaked exhaust gas fills the room.

  In order to provide an exhaust gas suction device for a vehicle under test that can eliminate the exhaust gas leaking from between the muffler and the hopper and that can be easily tested in a small and convenient place. The technical problem which should arise arises, and this invention aims at solving this problem.

  The present invention has been proposed to achieve the above object, and the invention according to claim 1 is directed to an exhaust gas outlet pipe, an exhaust part provided on one end side of the exhaust gas outlet pipe, and the exhaust gas outlet pipe. In an exhaust gas suction device for a vehicle under test, which has a cylindrical intake hopper provided on the other end side, and sucks exhaust gas by arranging the intake hopper opposite to the muffler of the vehicle under test, on the upper surface side of the intake hopper An exhaust gas suction device for a vehicle to be tested is provided in which a notch for escaping a part of a vehicle body of the vehicle to be tested is provided so as to be inclined downward from the exhaust gas lead-out pipe side to the tip opening side.

  According to this configuration, when the cylindrical intake hopper is brought close to the muffler at the rear lower part of the vehicle body, a part of the vehicle body of the vehicle under test is allowed to escape at the cutout portion to avoid interference with the vehicle body. The intake hopper can be arranged close to the muffler from the gap to a position where the exhaust gas does not leak.

  According to a second aspect of the present invention, in the configuration of the first aspect, the exhaust gas lead-out pipe is formed of a bellows-like flexible flexible tube, and the intake hopper is mounted on a movable carriage to move the exhaust pipe. Provided is an exhaust gas suction device for a vehicle under test which is installed so as to be horizontally movable integrally with a table.

  According to this configuration, the test can be performed at a free position in the test site by moving the intake hopper together with the moving carriage on the floor surface in the test site.

  According to a third aspect of the present invention, there is provided the exhaust gas suction device for a vehicle under test according to the second aspect, wherein the intake hopper is installed on the movable carriage so as to be adjustable in height.

  According to this configuration, the height position of the intake hopper can be adjusted in accordance with the position of the muffler that changes depending on the height of the vehicle, and the test can be performed by always installing the intake hopper at the best position.

  Since the intake hopper can be arranged close to the muffler from the position between the muffler and the position where the exhaust gas does not leak, the exhaust gas leaking into the test site can be eliminated and the environment in the test site can be improved. Therefore, it is possible to provide a downsized exhaust gas suction device for a vehicle under test.

  In the invention described in claim 2, since the intake hopper can be moved on the floor surface of the room together with the moving carriage and the test can be performed at a free position in the room, in addition to the effect of the invention described in claim 1 Therefore, it is expected that the test can be easily performed at a convenient place.

  According to the third aspect of the invention, the height of the intake hopper can be adjusted in accordance with the position of the muffler that changes depending on the height of the vehicle, and the test can be performed with the intake hopper always installed at the best position. In addition to the effect of the invention described in Item 2, it is expected that the test can always be performed in the best condition. Moreover, since one apparatus can be used for testing various vehicles, versatility is improved.

The side surface schematic diagram which shows the exhaust gas suction device for test vehicles which concerns on embodiment of this invention in a test implementation state. FIG. 3 is a side view showing the structure around the intake section of the exhaust gas suction device for a vehicle under test according to the same embodiment. The front view which shows the suction part periphery structure of the exhaust gas suction device for test vehicles which concerns on embodiment same as the above. FIG. 4 is a cross-sectional view taken along line AA in FIG. 3. The side surface schematic diagram which shows an example of the conventional exhaust gas suction device for test vehicles in a test implementation state.

  The present invention provides a vehicle-exhaust gas suction device for a vehicle to be tested that is small in size that can eliminate exhaust gas leaking from between a muffler and a hopper, and that can be easily tested in a convenient free place. In order to achieve the object, an exhaust gas derivation pipe, an exhaust part provided on one end side of the exhaust gas derivation pipe, and a cylindrical intake hopper provided on the other end side of the exhaust gas derivation pipe, In the exhaust gas suction device for a vehicle under test that sucks exhaust gas by arranging the exhaust gas to face the muffler of the vehicle under test, a notch that allows a part of the vehicle body of the vehicle under test to escape is formed on the upper surface side of the intake hopper. This was realized by providing an inclination from the gas outlet pipe side to the tip opening side.

  Hereinafter, an example of an exhaust gas suction device for a vehicle under test according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4.

  FIG. 1 is a schematic side view showing an exhaust gas suction device for a vehicle under test according to an embodiment of the present invention in a test implementation state. In the figure, an exhaust gas suction device 10 for a vehicle under test is provided with an exhaust gas outlet pipe 11, an exhaust part 12 provided on one end side of the exhaust gas outlet pipe 11, and the other end side of the exhaust gas outlet pipe 11. A cylindrical intake hopper 13 and a moving carriage 14 for holding the intake hopper 13 and moving it freely on the floor 30 of the test site are provided, and the intake hopper 13 is an object to be tested by driving the engine. The exhaust gas is sucked from the exhaust section 12 side and discharged to the outside through the intake hopper 13 and the exhaust gas lead-out pipe 11 so as to face the muffler 16 of the test vehicle 15.

  More specifically with reference to FIGS. 2 to 4, the exhaust gas outlet pipe 11 has a bellows shape and is formed as a flexible and expandable pipe. Then, due to the expansion and contraction and flexibility of the exhaust gas outlet pipe 11, the hopper 13 and the gas outlet pipe 11 together with the gas outlet pipe 11 are positioned relatively freely on the floor surface 30 in a state where the exhaust section 12 is disposed at a fixed position. Can be drawn around. The exhaust gas outlet pipe 11 does not necessarily have a bellows shape as long as the exhaust gas outlet pipe 11 is flexible and can be bent.

  The exhaust unit 12 includes an electric exhaust fan 12a. When the electric exhaust fan 12a is rotationally driven, the exhaust gas is sucked from the intake hopper 13 side, and the exhaust gas is sent to the exhaust unit 12 side through the exhaust gas outlet pipe 11, Further, the exhaust part 12 can be exhausted to the outside.

  The intake hopper 13 is a metal cylindrical body having an opening 13a on the tip side, and the base side on the connection portion 13b side with the exhaust gas outlet pipe 11 is shown in FIG. 1, FIG. 2, and FIG. As described above, the exhaust gas sucked into the intake hopper 13 is formed in a funnel shape so that the exhaust gas can be smoothly sucked into the exhaust gas outlet pipe 11. A pair of mounting arms 18 and 18 are fixedly provided on the left and right sides of the intake hopper 13 so as to extend outward.

  Further, guide pipes 19 are provided at the front ends of the mounting arms 18 and 18 so as to open in the vertical direction. Each guide pipe 19 is provided with lock knobs 20 and 20 that can be unlocked. When the lock knob 20 is rotated in one direction, the shaft tip portion of the lock knob 20 protrudes into the guide pipe 19 and comes into contact with the peripheral surfaces of support portions 22a and 22a of the stay 22 to be described later. When the shaft is rotated in the opposite direction, the shaft tip of the lock knob 20 is retracted from the guide pipe 19 and is separated from the peripheral surfaces of the post portions 22a and 22a of the stay 22 to be described later to be unlocked. Yes.

  Further, a notch 17 for releasing a part of the vehicle body including the bumper of the vehicle under test 15 is provided on the upper surface portion of the intake hopper 13 on one end side where the opening 13a is provided. The notch 17 is formed so as to incline downward from the other end side that is the exhaust gas outlet pipe 11 side, that is, from the connection portion 13b side to the one end side opening 13a side. As shown in FIG. 1, the notch 17 causes the intake hopper 13 to interfere with the vehicle body of the vehicle under test 15 when the cylindrical intake hopper 13 is brought close to the muffler 16 provided in the lower rear portion of the vehicle body. A function of allowing a part of the vehicle under test 15 to escape so that the exhaust hopper 13 can be disposed close to the muffler 16 from a position between the intake hopper 13 and the muffler 16 to a position where no exhaust gas leaks. have.

  The movable carriage 14 includes a base plate 21 and a stay 22 projecting upward from the base plate 21.

  The base plate 21 is a plate-like member having a substantially square shape in plan view, and twin-wheel free casters 23, 23, 23, 23 are attached in the vicinity of the bottom corners. The base plate 21 can be freely moved on the floor surface 30 by the twin wheel casters 23, 23, 23, 23.

  The stay 22 is integrally formed with left and right column portions 22a and 22a and a beam portion 22b connecting the upper portions of the left and right column portions 22a and 22a, and is formed in a substantially U shape in a side view. The lower portions of the column portions 22a and 22a are fixedly mounted on the base plate 21 via the rotation adjusting members 24 and 24, respectively. Further, when attaching to the base plate 21, the column portions 22 a and 22 a are passed through the guide pipes 19 and 19 on the intake hopper 13 side, the stay 22 and the intake hopper 13 are integrated, and then the base It is attached on the plate 21 via the rotation adjusting members 24, 24.

  In this way, the column portions 22a, 22a integrated with the intake hopper 13 rotate the lock knobs 20, 20 in the locking direction so that the shaft tip portions of the lock knobs 20, 20 are in the guide pipe 19. Then, the guide pipes 19 and 19 are fixed to the support portions 22a and 22a. That is, the intake hopper 13 is locked and fixed to the support column 22a. When the lock knobs 20 and 20 are rotated in the opposite direction, the shaft tip portions of the lock knobs 20 and 20 are retracted from the guide pipes 19 and 19. As a result, the distal ends of the lock knobs 20 and 20 are released from the peripheral surfaces of the support columns 22a and 22a to release the locked state, and the intake hopper 13 freely moves in the vertical direction along the support columns 22a and 22a. It is possible to adjust the height of the intake hopper 13 from the floor surface 30 by this vertical movement.

  The rotation adjusting members 24, 24 support the column portions 22 a, 22 a of the stay 22 so as to be movable in the front-rear direction with respect to the base plate 21. The rotation adjusting members 24 and 24 have lock knobs 24a and 24a, and the tilt in the front-rear direction with respect to the base plate 21 can be adjusted by the lock / unlock operation of the lock knobs 24a and 24a. It has become.

  Therefore, in the exhaust gas suction apparatus 10 for a vehicle under test of the present embodiment configured as described above, the intake hopper 13 is moved together with the moving carriage 14 on the floor 30 of the test site, and the intake hopper 13 is tested. It can move freely to the position where the vehicle 15 is arranged. Further, the height of the intake hopper 13 is adjusted in accordance with the height and direction of the muffler 16 in the lower rear part of the vehicle under test 15 at the moved position, and the longitudinal direction of the support columns 22a, 22a with respect to the base plate 21 When the direction of the intake hopper 13 is adjusted by adjusting the inclination of the intake hopper 13 and then the intake hopper 13 is brought close to the muffler 16 of the vehicle under test 15, a part of the vehicle body of the vehicle under test 15 is formed at the notch 17. The intake hopper 13 can be disposed close to the muffler 16 from the space between the muffler 16 and the exhaust gas so as not to leak, avoiding interference with the vehicle body.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

  The present invention can also be applied to a case where a test is performed by driving an engine outdoors.

DESCRIPTION OF SYMBOLS 10 Exhaust gas suction device 11 for to-be-tested vehicle Exhaust gas exhaust pipe 12 Exhaust part 12a Electric exhaust fan 13 Intake hopper 13a Opening 13b Connection part side 14 Moving vehicle 15 Test vehicle 16 Muffler 17 Notch 18 Mounting arm 19 Guide pipe 20 Lock knob 21 Base plate 22 Stay 23 Twin wheel free caster 24 Rotation adjusting member 24a Lock knob 30 Floor surface

Claims (3)

A vehicle under test that includes an exhaust gas outlet pipe, an exhaust part provided on one end side of the exhaust gas outlet pipe, and a cylindrical intake hopper provided on the other end side of the exhaust gas outlet pipe, and that virtually runs the intake hopper In the exhaust gas suction device for a vehicle under test that sucks exhaust gas by placing it opposite to the muffler,
A notch for releasing a part of the vehicle body of the vehicle under test is provided on the upper surface portion side of the intake hopper so as to be inclined downward from the exhaust gas outlet pipe side to the tip opening portion side. Exhaust gas suction device for the vehicle under test.   The exhaust gas lead-out pipe is formed of a bellows-like flexible flexible pipe, and the intake hopper is mounted on a movable carriage and is installed so as to be horizontally movable integrally with the movable stage. The exhaust gas suction device for a vehicle under test according to claim 2.   The exhaust gas suction device for a vehicle under test according to claim 2, wherein the intake hopper is installed on the movable carriage so as to be adjustable in height.

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