JP2008026132A - Device and method for running test of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To appropriately confirm the reliability of running simulation by a computer by the use of a one-wheel tire model. <P>SOLUTION: The method has: a projection moving step for moving a movable projection 11 from its retracted position to projected position by operating a vertically-moving air cylinder 13, when a front tire 3 of a vehicle 7 passes over a predetermined location on a road surface of a test course C by travelling of the vehicle; a projection running-over step for making a rear tire 5 run over the movable projection 11 by the travelling of the vehicle 7, just after the finish of the projection moving step; and a behavior detection step for detecting an actual dynamic behavior of the rear tire 5 by an input from the movable projection 11, after the finish of the projection running-over step. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle travel test apparatus used for a vehicle travel test of a vehicle equipped with front tires and rear wheel tires, and a vehicle travel test method using the vehicle travel test apparatus directly.

  In recent years, with the development of CAE technology, it is often performed to evaluate the riding comfort characteristics of a vehicle and / or the vibration characteristics of a tire by a computer running simulation.

  That is, a road model including a vehicle model, a projection model, and / or a step model in which a single tire model is mounted on the vehicle body model is created, and the vehicle model is run on the road model to perform a running simulation by a computer. Then, based on the mechanical behavior of the tire model input from the projection model or the like obtained by the computer running simulation, the riding comfort characteristics of the vehicle and / or the vibration characteristics of the tire are evaluated.

  On the other hand, in order to confirm the reliability of the travel simulation by the computer, a vehicle travel test is performed as necessary.

  That is, a vehicle running test is performed by actually running a vehicle on a road surface of a test course including protrusions and / or steps using a vehicle with a tire mounted on the vehicle body. Then, the actual mechanical behavior of the tire by input from the projection obtained by the vehicle running test is compared with the mechanical behavior of the tire model by input from the projection model obtained by computer simulation. is doing.

In addition, there exist some which are shown to patent document 1 and patent document 2 as a prior art relevant to this invention.
JP-A-11-352024 JP 2006-30046 A

  By the way, since the computer running simulation uses a single tire model, even in the vehicle running test, the actual mechanical behavior of only one of the front wheel tire and the rear wheel tire due to the input from the protrusion or the like. Must be detected accurately.

  However, if an attempt is made to detect the actual mechanical behavior of the front wheel tire due to input from the protrusions, etc., immediately after the front wheel tire has overtaken the protrusion, etc., the rear wheel tire will carry over the protrusion, etc. Input from the protrusions or the like to the rear tire is transmitted to the front tire. Similarly, if an attempt is made to detect the actual mechanical behavior of the rear wheel tire due to an input by a protrusion or the like, immediately before the rear wheel tire carries out the protrusion, etc., the front wheel tire will carry over the protrusion, etc. The input to the front tire is transmitted from the protrusion or the like to the rear tire. That is, it is impossible to accurately detect the actual mechanical behavior of one tire due to input from a protrusion or the like without being influenced by the other tire. Therefore, there is a problem that it is difficult to accurately confirm the reliability of a running simulation by a computer using a single tire model.

  The same applies to drum tests for replica drums, etc., as the rotation speed of the drum increases, the rotation of the protrusion also increases, making it difficult to suppress the impact from the protrusion to a single shot. It was difficult to accurately detect the mechanical behavior when it was input only to the rear wheel tire.

  Accordingly, the present invention provides a novel vehicle running test apparatus capable of accurately detecting the actual mechanical behavior of a rear wheel tire by input from a movable protrusion or the like without being affected by the front wheel tire, and the vehicle. It is an object of the present invention to provide a novel vehicle running test method using a running test apparatus.

  A first feature of the present invention (feature of the invention described in claim 1) is a vehicle travel test apparatus used for a vehicle travel test of a vehicle equipped with front tires and rear tires. A movable protrusion movable up and down between a protruding position protruding upward with respect to the road surface of the test course and an immersion position immersed downward with respect to the road surface of the test course, and the movable protrusion in the vertical direction The movable protrusion moving means for moving the vehicle and the front wheel tire that is running pass through a predetermined position separated from the wheel base of the vehicle by a distance shorter than the wheel base of the vehicle as viewed from the traveling direction. Actuating means for actuating the movable protrusion moving means so as to move from a position to the protruding position.

  According to the first feature, when the front tire passes through the predetermined position on the road surface of the test course as the vehicle travels, the movable protrusion is moved by operating the movable protrusion moving means by the operating means. The position is moved to the protruding position. Immediately thereafter, the rear wheel tire passes over the movable protrusion as the vehicle travels. As a result, the actual mechanical behavior of the rear wheel tire due to the input from the movable protrusion is not affected by the front tire without input from the movable protrusion, in other words, without being affected by the front tire. It can be detected accurately.

  According to a second feature of the present invention (a feature of the invention described in claim 2), in addition to the first feature, the actuating means is characterized in that the front wheel tire of the running vehicle has passed the predetermined position. And a control means for controlling the movable protrusion moving means to move the movable protrusion from the immersive position to the protruding position when a detection signal from the sensor is input. That is.

  According to the second feature, when the detection signal from the sensor is input, the movable protrusion is moved from the immersion position to the protruding position by controlling the movable protrusion moving means by the control means.

  According to a third feature of the present invention (a feature of the invention described in claim 3), in addition to the first feature, the actuating means may be configured so that the front wheel tire of the running vehicle passes the predetermined position. The movable protrusion moving means is operated in conjunction with each other so as to move the movable protrusion from the immersion position to the protrusion position.

  According to a third feature, when the front wheel tire passes the predetermined position on the road surface of the test course by traveling of the vehicle, the movable protrusion is operated by the operating means in conjunction with the movable protrusion moving means. Is moved from the immersion position to the protruding position.

  According to a fourth feature of the present invention (a feature of the invention described in claim 4), in addition to any one of the first to third features, the movable protrusion positioned at the projecting position is provided. And locking means for locking in an up and down direction so as not to move.

  According to the fourth feature, after the movable protrusion is moved from the immersive position to the protruding position, the movable protrusion is locked so as not to move in the vertical direction by the locking means.

  A fifth feature of the present invention (feature of the invention described in claim 5) is a vehicle running test apparatus used for a vehicle running test of a vehicle equipped with front tires and rear tires. A movable frame tiltable in the vertical direction between a step forming position for forming a lowered step or a raised step with respect to the road surface of the test course and a reference position located on the same plane as the road surface of the test course, and the movable frame Movable frame tilting means that tilts the vehicle up and down, and the movable frame when the front wheel tire that is running passes through a predetermined position separated from the wheel base of the vehicle by a distance shorter than the wheel base of the vehicle when viewed from the running direction. Actuating means for actuating the movable frame tilting means so as to tilt from the reference position to the step forming position.

  According to a fifth feature, when the front tire passes the predetermined position on the road surface of the test course as the vehicle travels, the movable frame tilting means is actuated by the actuating means to move the movable frame to the reference. Tilt from the position to the step forming position. Immediately thereafter, the rear wheel tire rides on the lowered step or rides on the raised step. Thereby, there is no input to the front wheel tire from the lowered step or the raised step, in other words, the rear wheel tire by input from the lowered step or the raised step without being affected by the front wheel tire. The actual mechanical behavior of can be detected.

  According to a sixth feature of the present invention (a feature of the invention described in claim 6), in addition to the fifth feature, the actuating means is characterized in that the front wheel tire of the running vehicle has passed the predetermined position. And a control means for controlling the movable frame tilting means to move the movable frame from the reference position to the step forming position when a detection signal from the sensor is input. It is that you are.

  According to a sixth feature, when a detection signal from the sensor is input, the movable frame is tilted from the reference position to the step forming position by controlling the movable frame tilting means by the control means.

  According to a seventh feature of the present invention (a feature of the invention described in claim 7), in addition to the fifth feature, the actuating means is configured such that the front wheel tire of the running vehicle passes the predetermined position. The movable frame tilting means is operated in conjunction with each other so as to tilt the movable frame from the reference position to the step forming position.

  According to a seventh feature, when the front tire passes through the predetermined position on the road surface of the test course by traveling of the vehicle, the movable frame tilting means is operated by the operating means in conjunction with the movable frame. Is tilted from the reference position to the step forming position.

  According to an eighth feature of the present invention (a feature of the invention described in claim 8), in addition to any of the fifth to seventh features, the movable frame positioned at the protruding position is Locking means for locking in a non-tiltable manner in the vertical direction.

  According to the seventh feature, after the movable frame is moved from the reference position to the step forming position, the movable frame is locked so as not to tilt in the vertical direction by the locking means.

  According to a ninth feature of the present invention (a feature of the invention described in claim 9), in the vehicle running test method that directly uses the vehicle running test apparatus comprising the first means, the front wheel tire is moved by the running of the vehicle. A protrusion moving step for moving the movable protrusion from the retracted position to the protruding position by operating the movable protrusion moving means by the operating means when passing through the predetermined position on the road surface of the test course; and the protrusion moving step Immediately after the end of the step, the rear wheel tire passes over the movable protrusion by running of the vehicle, and after the end of the protrusion overstep, the actual dynamics of the rear wheel tire by the input from the movable protrusion A behavior detection step of detecting the behavior.

  According to a ninth feature, immediately after the movable protrusion is moved from the immersive position to the protruding position, the rear tire is moved from the movable protrusion to the movable protrusion so that the rear tire gets over the movable protrusion. Input to the front wheel tire does not occur, in other words, the actual mechanical behavior of the rear wheel tire due to input from the movable protrusion can be accurately detected without being affected by the front wheel tire.

  A tenth feature of the present invention (a feature of the invention described in claim 10) is the vehicle running test method that directly uses the vehicle running test apparatus comprising the fifth means, wherein the front tire is moved by the running of the vehicle. A frame tilting step of tilting the movable frame from the reference position to the step forming position by operating the movable frame tilting means by the actuating means when passing through the predetermined position on the road surface of the test course; Immediately after the end of the step, a ride step or a ride step in which the rear tire gets on the lower step or rides on the raised step by running of the vehicle, and after the end of the ride step or the ride step, Actual dynamics of the rear wheel tire by input from the lowered step or the raised step A behavior detection step of detecting a motion, is that provided with the.

  According to the tenth feature, immediately after the movable frame is tilted from the reference position to the step forming position, the lower wheel tire moves down the raised step or rides up the raised step. The actual mechanical behavior of the rear wheel tire due to the input is detected from the lowered step or the raised step without being input to the front tire from the step or the raised step and without being influenced by the front tire. be able to.

  According to the invention of any one of claims 1 to 10, an actual mechanical behavior caused by an input can be detected from the movable protrusion or the like without being affected by the front wheel tire. Therefore, it is possible to accurately confirm the reliability of the computer-based running simulation using a single tire model.

  For the same reason, it is possible to accurately evaluate the riding comfort characteristics of the vehicle and / or the vibration characteristics of the tire (vibration characteristics of the rear wheel tire) by a vehicle running test.

(First embodiment)
1st Embodiment is described with reference to Fig.1 (a) (b).

  Here, FIGS. 1A and 1B are schematic views for explaining the vehicle travel test apparatus and the vehicle travel test method according to the first embodiment.

  As shown in FIGS. 1 (a) and 1 (b), a vehicle running test apparatus 1 according to the first embodiment is an apparatus used for a vehicle running test of a vehicle 7 fitted with a front tire 3 and a rear tire 5. The specific configuration of the vehicle running test apparatus 1 is as follows. The vehicle 7 is equipped with a load detector 9A for detecting the tire axial load of the rear wheel tire 5 and an acceleration sensor 9B for detecting acceleration generated on the tire axis of the rear wheel tire 5.

  That is, the test course C is provided with a movable protrusion 11 extending in the left-right direction (a direction orthogonal to the paper surface in FIG. 1), and the movable protrusion 11 is directed upward with respect to the road surface of the test course C. A protruding position (the position shown in FIG. 1 (b)) that protrudes upward (in FIG. 1) and an immersion position (in FIG. 1 (downward) in FIG. 1) with respect to the road surface of the test course C. It is possible to move up and down between the position shown in a). In addition, immersing downward with respect to the road surface of the test course C means that the movable protrusion 11 is flush with the road surface of the test course C. In the test course C, a plurality of vertically moving air cylinders 13 (only one is shown in FIG. 1) for moving the movable protrusion 11 in the vertical direction are embedded in a state separated in the horizontal direction. The tip of the piston rod 15 in the moving air cylinder 13 is connected to the movable protrusion 11. Furthermore, a lock hole 17 is formed in each piston rod 15 of each vertical movement air cylinder 13. In place of the vertical movement air cylinder 13, another actuator such as a hydraulic cylinder may be used.

  In the test course C, the traveling front wheel tire 3 is seen from the traveling direction in front of the movable protrusion 11 from the wheel base of the vehicle 7 (the distance between the tire axis of the front wheel tire 3 and the tire axis of the rear tire 5). In addition, a contact sensor 19 is provided for detecting by contact that a predetermined position separated by a short distance is passed. Instead of the contact sensor 19, another sensor such as a non-contact sensor that detects that the front tire 3 of the traveling vehicle 7 has passed a predetermined position may be used. Furthermore, in this invention, it is not limited to the case where the position of the front-wheel tire 3 is detected directly, The structure which can detect the position of the front-wheel tire 3 indirectly may be sufficient. In other words, the sensor of the present invention has a shorter distance than the wheel base of the vehicle 7 to the front of the movable protrusion 11 when the front wheel tire 3 of the vehicle 7 is seen from the traveling direction when the tip portion of the vehicle 7 passes through another predetermined position. It is a concept that includes all configurations that can indirectly detect that the vehicle is traveling only.

  The contact sensor 19 is connected to a computer 21, and the CPU in the computer 21 has a function as a cylinder control unit 23 that controls the vertical movement air cylinder 13. Specifically, when a detection signal from the contact sensor 19 is input, the cylinder control unit 23 controls the vertical movement air cylinder 13 so as to move the movable protrusion 11 from the retracted position to the protruding position.

  A lock mechanism 25 is provided in the vicinity of each vertical movement air cylinder 13 to lock the movable protrusion 11 positioned at the protruding position so that the movable protrusion 11 cannot move in the vertical direction. The lock mechanism 25 includes a lock pin 27 provided in the vicinity of the vertical movement air cylinder 13 and engageable with the lock hole 17 of the piston rod 15, and a lock actuator 29 for moving the lock pin 27 in the axial direction. Each is equipped. Here, the lock pin 27 is configured to face the lock hole 17 when the movable protrusion 11 is located at the protruding position. The lock mechanism 25 is not limited to the above-described configuration, and can be changed as appropriate.

  Next, the vehicle running test method according to the first embodiment will be described.

  The vehicle running test method according to the first embodiment is a test method using the vehicle running test apparatus 1 directly, and includes (IA) a protrusion moving step, (IB) a protrusion overriding step, (IC) a behavior detecting step, It has.

(IA) Protrusion moving step When the front tire 3 passes a predetermined position on the road surface of the test course C as the vehicle 7 travels, in other words, when a detection signal from the contact sensor 19 is input, the cylinder control unit 23 The movable protrusion 11 is moved from the immersive position to the protruding position by controlling the air cylinder 13 for vertical movement. Then, each lock actuator 29 is operated to move the lock pin 27 in the axial direction and engage with the lock hole 17, thereby locking the movable protrusion 11 positioned at the protruding position so as not to be movable in the vertical direction.

(IB) Step over bump
(IA) Immediately after the end of the protrusion moving step, the rear wheel tire 5 gets over the movable protrusion 11 as the vehicle 7 travels. Here, when the rear wheel tire 5 moves over the movable protrusion 11, an input from the movable protrusion 11 to the rear wheel tire 5 occurs.

(IC) Behavior detection step
(IB) After the protrusion overstep, the load detector 9A detects the actual tire axle load (one of the mechanical behaviors) of the rear tire 5 from the movable protrusion 11 as input. In addition to detecting the actual tire axle load of the rear tire 5 by the load detector 9A (or instead of detecting it), the actual acceleration (mechanical behavior) generated on the tire axle of the rear tire 5 by the acceleration sensor 9B. May be detected.

  Then, the effect | action and effect of 1st Embodiment are demonstrated.

  According to the first embodiment, immediately after the movable protrusion 11 is moved from the retracted position to the protruded position, the rear tire 5 moves over the movable protrusion 11 as the vehicle 7 travels. 3, in other words, without being affected by the front tire 3, the actual tire axle load of the rear tire 5 caused by the input from the movable protrusion 11 (occurs on the tire axle of the rear tire 5). (Actual acceleration) can be accurately detected.

  Therefore, according to the first embodiment, it is possible to accurately confirm the reliability of a running simulation by a computer (not shown) using a single tire model.

  Also, the riding comfort characteristic of the vehicle 7 and / or the vibration characteristic of the tire (vibration characteristic of the rear wheel tire 5) can be accurately evaluated by the vehicle running test.

(Second Embodiment)
A second embodiment will be described with reference to FIGS.

  Here, FIGS. 2A and 2B are schematic views for explaining a vehicle travel test apparatus and a vehicle travel test method according to the second embodiment.

  As shown in FIGS. 2A and 2B, a vehicle travel test apparatus 31 according to the second embodiment is an apparatus used for a vehicle travel test of a vehicle 7 (same as the vehicle 7 of the first embodiment). The specific configuration of the vehicle running test apparatus 31 is as follows.

  That is, the test course C is provided with a movable protrusion 33 extending in the left-right direction (a direction orthogonal to the paper surface in FIG. 2), and the movable protrusion 33 is directed upward with respect to the road surface of the test course C. A projecting position (the position shown in FIG. 2B) projecting upward (in FIG. 2B) and an immersion position (FIG. It is possible to move up and down between the position shown in a). Further, in the test course C, a plurality of vertically moving hydraulic cylinders 35 (only one is shown in FIG. 2) for moving the movable protrusion 33 in the vertical direction are embedded in a state separated in the horizontal direction. The front end of the piston rod 37 in the dynamic hydraulic cylinder 35 is connected to the movable protrusion 33. Further, each upper cylinder chamber 35u in each vertical movement hydraulic cylinder 35 is provided with a spring 39 that can bias the piston rod 37 downward, and each piston rod 37 in each vertical movement hydraulic cylinder 35 has a spring 39. The lock holes 41 are respectively formed.

  In the vicinity of the front side (left side in FIG. 2) of the movable projection 33 on the test course C, a plurality of interlocking operation hydraulic cylinders 43 are embedded in a state of being separated from each other in the left and right directions. 45 is provided with a trigger member 47 extending in the left-right direction. Here, the trigger member 47 is located at a predetermined position separated from the front of the movable protrusion 33 by a shorter distance than the wheel base of the vehicle 7 when viewed from the traveling direction. Each upper cylinder chamber 43u in each interlocking actuation hydraulic cylinder 43 is provided with a spring 49 capable of urging the piston rod 45 downward, and the lower cylinder chamber in each interlocking actuation hydraulic cylinder 43 is provided. 43 d communicates with the lower cylinder chamber 35 d in the corresponding hydraulic cylinder 35 for vertical movement via the communication pipe 51. Then, when the front wheel tire 3 of the traveling vehicle 7 steps on the trigger member 47 and passes through a predetermined position on the road surface of the test course C, the plurality of interlocking actuation hydraulic cylinders 43 project the movable protrusion 33 from the immersion position. A plurality of vertically moving hydraulic cylinders 35 are operated in conjunction with each other so as to move to a position.

  In the vicinity of each vertical movement hydraulic cylinder 35, a lock mechanism 53 for locking the movable projection 33 positioned at the protruding position so as not to move in the vertical direction is provided. The lock mechanism 53 includes a lock pin 55 provided in the vicinity of the vertical movement hydraulic cylinder 35 and engageable with the lock hole 41 of the piston rod 37, and a lock actuator 57 for moving the lock pin 55 in the axial direction. Each is equipped. Here, the lock pin 55 is configured to face the lock hole 41 when the movable protrusion 33 is located at the protruding position. The lock mechanism 53 is not limited to the above-described configuration, and can be changed as appropriate.

  Next, a vehicle running test method according to the second embodiment will be described.

  The vehicle running test method according to the second embodiment is a test method using the vehicle running test apparatus 31 directly, and includes (II-A) a protrusion moving step, (II-B) a protrusion overstep, and (II- C) a behavior detection step.

(II-A) Protrusion moving step When the front wheel tire 3 steps on the trigger member 47 as the vehicle 7 travels and passes a predetermined position on the road surface of the test course C, the plurality of interlocking operation hydraulic cylinders 43 cause a plurality of vertical movements. By operating the hydraulic cylinder 35 in conjunction with each other, the movable protrusion 33 is moved from the immersive position to the protruding position. Then, each lock actuator 57 is operated to move the lock pin 55 in the axial direction and engage with the lock hole 41, thereby locking the movable protrusion 33 located at the protruding position so as not to be movable in the vertical direction. Note that the input from the trigger member 47 caused by the front wheel tire 3 stepping on the trigger member 47 is small enough to be ignored.

(II-B) Step over bump
(II-A) Immediately after the end of the protrusion moving step, the rear tire 5 moves over the movable protrusion 33 as the vehicle 7 travels. Here, when the rear wheel tire 5 moves over the movable protrusion 33, an input from the movable protrusion 33 to the rear wheel tire 5 occurs.

(II-C) Behavior detection step
(II-B) After the end of the protrusion overstep, the load detector 9A detects the actual tire axial load (one of the mechanical behaviors) of the rear wheel tire 5 as input from the movable protrusion 33. In addition to detecting the actual tire axle load of the rear tire 5 by the load detector 9A (or instead of detecting it), the actual acceleration (mechanical behavior) generated on the tire axle of the rear tire 5 by the acceleration sensor 9B. May be detected.

  And also in 2nd Embodiment, there exists an effect | action and effect similar to 1st Embodiment.

(Third embodiment)
A third embodiment will be described with reference to FIGS. 3 (a) and 3 (b) and FIGS. 4 (a) and 4 (b).

  Here, FIGS. 3A and 3B are schematic diagrams for explaining the vehicle running test apparatus and the vehicle running test method according to the third embodiment, and FIG. 4A shows the movable frame at the first tilt position. FIG. 4B is a schematic diagram of the vehicle running test apparatus according to the third embodiment in a state where the movable frame is located at the second tilt position. is there.

  As shown in FIGS. 3A and 3B and FIGS. 4A and 4B, the vehicle travel test apparatus 59 according to the third embodiment is a vehicle 7 (same as the vehicle 7 of the first embodiment). It is an apparatus used for a running test, and a specific configuration of the vehicle running test apparatus 59 is as follows.

  That is, the test course C is provided with a movable frame 61 that extends in the left-right direction (a direction orthogonal to the plane of the paper in FIGS. 3 and 4) via a hinge 63. A first step forming position (FIG. 3 (FIG. 3)) that forms a lowered step B with respect to the road surface of the test course C via a reference position (position shown in FIG. 3A) located on the same plane as the road surface of C. a) and the second step forming position (position shown in FIG. 4B) for forming the raised step B ′ (the vertical direction in FIGS. 3 and 4). ). Further, a plurality of tilting air cylinders 65 (only one is shown in FIGS. 3 and 4) for tilting the movable frame 61 in the vertical direction are embedded in the test course C in a state separated in the left-right direction. The tip of the piston rod 67 in each tilting air cylinder 65 is connected to the movable frame 61. Further, a first lock hole 69 and a second lock hole 71 are formed in the piston rod 67 of each tilting air cylinder 65. In place of the tilting air cylinder 65, another actuator such as a hydraulic cylinder may be used.

  On the test course C, there is a contact sensor 73 that detects by contact that the traveling front wheel tire 3 has passed through a predetermined position separated by a distance shorter than the wheel base of the vehicle 7 in front of the movable frame 61 as viewed from the traveling direction. Is provided. Instead of the contact sensor 73, another sensor such as a non-contact sensor that detects that the front tire 3 of the traveling vehicle 7 has passed a predetermined position may be used.

  The contact sensor 73 is connected to a computer 75, and a CPU in the computer 75 has a function as a cylinder control unit 77 that controls the tilting air cylinder 65. Specifically, when the detection signal of the contact sensor 73 is input, the cylinder control unit 77 moves the tilting air cylinder 65 so as to tilt the movable frame 61 from the reference position to the first tilt position or the second tilt position. It is something to control.

  In the vicinity of each tilting air cylinder 65, a lock mechanism 79 for locking the movable frame 61 located at the first tilt position or the second tilt position so as not to tilt in the vertical direction is provided. The lock mechanism 79 is provided in the vicinity of the tilting air cylinder 65 and can be engaged with the first lock hole 69 or the second lock hole 71 of the piston rod 67, and the lock pin 81 in the axial direction. And a locking actuator 83 that moves to the right. Here, the lock pin 81 is opposed to the first lock hole 69 when the movable frame 61 is located at the first tilt position, and the first lock pin 81 is located when the movable frame 61 is located at the second tilt position. 2 It faces the lock hole 71. The lock mechanism 79 is not limited to the above-described configuration, and can be changed as appropriate.

  Next, a vehicle running test method according to the third embodiment will be described.

  The vehicle travel test method according to the third embodiment is a test method that directly uses the vehicle travel test apparatus 59, and includes (III-A) a frame tilting step and (III-B) a getting on / off step or (III-C). ) A ride-up step and (III-D) behavior detection step.

(III-A) Frame tilting step When the front tire 3 passes a predetermined position on the road surface of the test course C as the vehicle 7 travels, in other words, when a detection signal from the contact sensor 73 is input, the cylinder controller The tilting air cylinder 65 is controlled by 77 to tilt the movable frame 61 from the reference position to the first tilt position or the second tilt position. Then, each lock actuator 83 is actuated to move the lock pin 27 in the axial direction and engage with the first lock hole 69 or the second lock hole 71, so that the first tilt position or the second tilt position is reached. The positioned movable frame 61 is locked so as not to tilt in the vertical direction.

(III-B) boarding step or (III-C) boarding step
(III-A) Immediately after the end of the frame tilting step, the rear tire 5 is lowered or lowered by the traveling of the vehicle 7 or is raised by the raised step B ′. Here, when the rear wheel tire 5 gets on the lower step B or rides on the raised step B ′, input to the rear wheel tire 5 occurs from the lower step B or on the raised step B ′.

(III-D) Behavior detection step
After the completion of the (III-B) step (III-B) or the (III-C) step, the actual tire axle load of the rear wheel tire 5 is input by the load detector 9A. One of the mechanical behaviors) is detected. In addition to detecting the actual tire axle load of the rear tire 5 by the load detector 9A (or instead of detecting it), the actual acceleration (mechanical behavior) generated on the tire axle of the rear tire 5 by the acceleration sensor 9B. May be detected.

  Then, the effect | action and effect of 3rd Embodiment are demonstrated.

  According to the third embodiment, immediately after the movable frame 61 is tilted from the reference position to the first tilting position or the second tilting position, the rear tire 5 is lowered or lowered by the lowering step B by the traveling of the vehicle 7. In order to ride B ′, there is no input to the front tire 3 from the lower step B or the lower step B ′. In other words, the lower step B is not affected by the front tire 3. It is possible to accurately detect the actual tire axle load of the rear wheel tire 5 (actual acceleration generated on the tire axle of the rear wheel tire 5) by the input from the getting on / off step B ′.

  Therefore, according to the third embodiment, it is possible to accurately confirm the reliability of a running simulation by a computer (not shown) using a single tire model.

  Also, the riding comfort characteristic of the vehicle 7 and / or the vibration characteristic of the tire (vibration characteristic of the rear wheel tire 5) can be accurately evaluated by the vehicle running test.

  The present invention is not limited to the description of the above-described embodiment. For example, instead of using the contact sensor 73 and the computer 75 in the third embodiment, the interlocking operation hydraulic cylinder 43 according to the second embodiment is used. When the front wheel tire 3 of the traveling vehicle passes through a predetermined position using components corresponding to the trigger member 47 and the like, the movable frame 61 is tilted from the reference position to the first step forming position or the second step forming position. The tilting actuators such as the tilting air cylinder 65 may be operated in conjunction with each other.

  Further, the scope of rights encompassed by the present invention is not limited to these embodiments.

It is a schematic diagram explaining the vehicle travel test apparatus and the vehicle travel test method according to the first embodiment. It is a schematic diagram explaining the vehicle travel test apparatus and vehicle travel test method which concern on 2nd Embodiment. It is a schematic diagram explaining the vehicle travel test apparatus and vehicle travel test method which concern on 3rd Embodiment. FIG. 4A is a schematic diagram of the vehicle travel test apparatus according to the third embodiment in a state where the movable frame is located at the first tilt position, and FIG. 4B is a diagram where the movable frame is located at the second tilt position. It is a schematic diagram of the vehicle running test apparatus which concerns on 3rd Embodiment of a state.

Explanation of symbols

C Test course B Lowering step B 'Raising step 1 Vehicle running test device 3 Front wheel tire 5 Rear wheel tire 7 Vehicle 9A Load detector 9B Acceleration sensor 11 Movable projection 13 Vertical movement air cylinder 19 Contact sensor 23 Cylinder control unit 25 Lock mechanism 31 Vehicle traveling test apparatus 33 Movable protrusion 35 Vertical movement hydraulic cylinder 43 Interlocking hydraulic cylinder 47 Trigger member 51 Communication pipe 53 Lock mechanism 59 Vehicle traveling test apparatus 61 Movable frame 65 Tilt air cylinder 73 Contact sensor 77 Cylinder control section 79 Lock mechanism

Claims (10)

In a vehicle running test apparatus used for a vehicle running test of a vehicle equipped with a front tire and a rear tire,
A movable protrusion provided on the test course and movable in a vertical direction between a protruding position protruding upward with respect to the road surface of the test course and an immersion position recessed downward with respect to the road surface of the test course; ,
Movable protrusion moving means for moving the movable protrusion in the vertical direction;
When the front wheel tire that is running passes through a predetermined position separated from the vehicle wheel base by a distance shorter than the wheel base of the vehicle as viewed from the running direction, the movable protrusion is moved from the retracted position to the protruding position. Operating means for operating the movable protrusion moving means;
A vehicle running test apparatus comprising: The operating means is
A sensor for detecting that the front wheel tire of the traveling vehicle has passed the predetermined position;
When a detection signal from the sensor is input, control means for controlling the movable protrusion moving means to move the movable protrusion from the immersion position to the protruding position;
The vehicle running test apparatus according to claim 1, comprising:   The actuating means operates the movable protrusion moving means in conjunction with each other so as to move the movable protrusion from the immersive position to the protruding position when a front wheel tire of the traveling vehicle passes the predetermined position. The vehicle running test apparatus according to claim 1, wherein Locking means for locking the movable protrusion positioned at the protruding position so as not to move in the vertical direction;
The vehicle running test apparatus according to any one of claims 1 to 3, further comprising: In a vehicle running test apparatus used for a vehicle running test of a vehicle equipped with a front tire and a rear tire,
It is provided on the test course and can be tilted up and down between a step forming position for forming a lowered step or a raised step with respect to the road surface of the test course and a reference position located on the same plane as the road surface of the test course. A movable frame;
Movable frame tilting means for tilting the movable frame in the vertical direction;
When the traveling front wheel tire passes through a predetermined position separated from the vehicle wheel base by a distance shorter than the wheel base of the vehicle when viewed from the traveling direction, the movable frame is tilted from the reference position to the step forming position. Actuating means for actuating the movable frame tilting means,
A vehicle running test apparatus comprising: The operating means is
A sensor for detecting that the front wheel tire of the traveling vehicle has passed the predetermined position;
When a detection signal from the sensor is input, control means for controlling the movable frame tilting means to move the movable frame from the reference position to the step forming position;
The vehicle running test apparatus according to claim 5, comprising:   The actuating means operates the movable frame tilting means in conjunction with each other so as to tilt the movable frame from the reference position to the step forming position when a front wheel tire of the traveling vehicle passes the predetermined position. The vehicle running test apparatus according to claim 5, wherein Lock means for locking the movable frame located at the protruding position so as not to tilt in the vertical direction;
The vehicle running test apparatus according to any one of claims 5 to 7, further comprising: In the vehicle running test method using the vehicle running test device according to claim 1 directly,
When the front tire passes the predetermined position on the road surface of the test course as the vehicle travels, the movable protrusion is moved from the retracted position to the protruding position by operating the movable protrusion moving means by the operating means. A protrusion moving step,
Immediately after completion of the protrusion moving step, a protrusion overriding step in which the rear wheel tire passes over the movable protrusion by running of the vehicle;
A behavior detecting step of detecting an actual mechanical behavior of the rear wheel tire by input from the movable projection after the projection overstep;
A vehicle running test method characterized by comprising: In the vehicle running test method using the vehicle running test device according to claim 5 directly,
When the front tire passes the predetermined position on the road surface of the test course as the vehicle runs, the movable frame is moved from the reference position to the step forming position by actuating the movable frame tilting means by the actuating means. A frame tilting step for tilting;
Immediately after the end of the frame tilting step, a riding step or a step of getting on / off the rear wheel tire that gets on the lowering step or gets on the raising step by running of the vehicle;
A behavior detecting step for detecting an actual mechanical behavior of the rear wheel tire by an input from the lowered step or the raised step after the ride step or the ride step;
A vehicle running test method characterized by comprising:

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