JP2022082002A - Automobile testing system and road driving simulator - Google Patents

Abstract

To correctly simulate force applied to a steering system from a wheel when an automobile runs actually in an automobile testing system for applying a load to a drive shaft of the automobile from a dynamometer.SOLUTION: A dynamometer 3 is connected with a hub of an automobile 6 that is supported rotatably, and applies torque to a drive shaft 73 via the hub. A steering load device 5 is connected with a tie rod 74 of the automobile 6 in which connection with the hub of the automobile 6 is separated, and applies force to a steering system of the automobile 6 via the tie road 74. A test control system 1 controls the dynamometer 3 such that a load applied to the drive shaft 73 becomes a load equivalent to a driving load when the automobile 6 runs actually, and controls the steering load device 5 such that force applied to the steering system becomes force applied to the steering system from a wheel when the automobile 6 runs actually.SELECTED DRAWING: Figure 1

Description

The present invention mainly relates to a technique for testing an automobile.

As a technique for testing an automobile, a test using a simulated wheel, a tire mounted on the simulated wheel, and a simulated wheel provided with a connecting shaft rotatably supported by a bearing provided in the center of the simulated wheel. Techniques for testing automobiles using devices are known. In this technique, one end of the simulated wheel connecting shaft is connected to the automobile hub bearing and the other end of the connecting shaft is connected to the dynamometer via a torque sensor, or one end of the simulated wheel connecting shaft is connected via a torque sensor. By connecting to the hub bearing of the car and connecting the other end of the connecting shaft to the dynamometer, the torque sensor can be used from the drive shaft while applying a load from the dynamometer to the drive shaft of the car while keeping the car in the same place. The output torque is measured (for example, Patent Document 1).

In addition, as a technology for testing automobiles, the dynamometer is connected to the hub bearing of the automobile with the wheels removed from the automobile, and the dynamometer supports the hub bearing against the floor surface while supporting the hub bearing from the dynamometer to the automobile. A technique for applying a load to a drive shaft is also known (for example, Patent Document 2).

In this technique, the dynamometer is supported on the floor surface via casters, and the dynamometer moves on the floor surface in accordance with the change in the steering angle of the hub bearing due to the operation of the steering wheel of the automobile. In addition, in order to simulate the reaction force against steering, the floor surface is tilted so that the load in the steering angle neutral position of the magnitude corresponding to the steering angle of the hub bearing is applied to the hub bearing by the weight of the dynamometer. It is provided.

Japanese Unexamined Patent Publication No. 2017-101958 Japanese Patent No. 6377311

According to the above-mentioned technique for simulating the reaction force against steering by providing an inclination on the floor surface on which the dynamometer moves according to the change in the steering angle of the hub bearing, the simulated reaction force is the weight of the dynamometer. Therefore, the force applied to the steering system of the automobile is far from the force applied to the steering system from the wheels when the automobile is actually driven. Further, since the simulated force is uniquely determined by the steering angle, the weight of the dynamometer, and the inclination angle of the floor, it is not possible to simulate the force applied from the wheels to the steering system of the automobile in various situations.

It is an object of the present invention to correctly simulate the force applied to the steering system from the wheels when the actual automobile is running in the automobile test system in which the test is performed while applying a load from the dynamometer to the drive shaft of the automobile.

Another object of the present invention is to provide a real road running simulator that simulates a running load and a steering reaction force during a real running.

In order to achieve the above-mentioned problems, the present invention comprises a torque load device for applying a load to a drive shaft by applying torque to the hub shaft of the wheel or hub bearing of the automobile in an automobile test system used for testing an automobile. The tie rod or steering rack of the vehicle that has been disconnected from the knuckle arm of the knuckle of the vehicle that supports the hub bearing of the vehicle is connected to the connection target and a force is applied to the connection target. It is equipped with a steering load device that applies force to the steering rack of the vehicle.

In this automotive test system, the torque load device may be a dynamometer that is coupled to the hub shaft of a rotatably supported automotive hub bearing and applies torque to the hub shaft to load the drive shaft. ..

In this case, a plurality of the dynamometers are provided corresponding to at least each of the wheels that are the driving wheels of the automobile, and each dynamometer is connected to the hub shaft of the hub bearing of the corresponding wheel and torque is applied to the hub shaft. It is preferable that a load is applied to the drive shaft by adding a load, the steering load device is provided corresponding to each of the wheels to be steered by the automobile, and each steering load device is attached to a hub of the corresponding wheel. The tie rod or steering rack of the vehicle that has been disconnected from the knuckle arm of the knuckle of the vehicle that supports the bearing is connected to the connection target as the connection target, and the vehicle is connected by applying force to the connection target. It is preferable to apply force to the steering rack.

In the above automobile test system, the steering load device may have a connecting portion connected to the connecting object and an actuator for moving the connecting portion at least in the left-right direction of the automobile.

Further, the object to be connected may be a tie rod with the tie rod end removed.
Further, in the above automobile test system, the torque load device is generated so that the same load as the load applied to the drive shaft when the automobile actually runs under the conditions indicated by the set test conditions is applied to the drive shaft. A control unit that controls the torque to be applied and controls the force generated by the steering load device so that the force applied to the steering rack from the wheels when the vehicle actually runs under the conditions indicated by the test conditions is applied to the steering rack. It is preferable to provide.

According to the automobile test system as described above, with the hub bearing and the steering system disconnected, the load applied to the drive shaft and the force applied to the steering rack eliminate mutual interference in the vehicle. The torque load device accurately simulates the load applied to the drive shaft when the vehicle is actually driven, while the steering load device applies the force applied to the steering system from the wheels when the vehicle is actually driven. Can be simulated correctly.

In addition, the present invention also provides a torque load device that applies a load to the drive shaft by applying torque to the hub shaft of the wheel or hub bearing of the vehicle as a real road driving simulator that simulates the actual driving state of the vehicle. The tie rod or steering rack of the vehicle that has been disconnected from the knuckle arm of the knuckle of the vehicle that supports the hub bearing of the vehicle is connected to the connection target, and a force is applied to the connection target. It is provided with a steering load device that applies a force to the steering rack of the vehicle, and a control unit that controls the torque generated by the torque load device and the force generated by the steering load device according to the state of the vehicle. Provides a real road driving simulator.

According to such an actual road driving simulator, by using an actual vehicle, it is possible to realize a simulation simulating a driving load and a steering reaction force during actual driving in a more realistic form for the driver.

According to the present invention, in an automobile test system in which a test is performed while applying a load from a dynamometer to a drive shaft of an automobile, it is possible to correctly simulate the force applied to the steering system from the wheels when the actual automobile is running.

Further, according to the present invention, it is possible to provide a real road running simulator that simulates a running load and a steering reaction force during a real running.

It is a figure which shows the structure of the automobile test system which concerns on embodiment of this invention. It is a figure which shows the structure of the simulated wheel which concerns on embodiment of this invention. It is a figure which shows the steering load device which concerns on embodiment of this invention. It is a figure which shows the operation of the steering load device which concerns on embodiment of this invention. It is a figure which shows the other use example of the steering load device which concerns on embodiment of this invention. It is a figure which shows the other structural example of the steering load device which concerns on embodiment of this invention. It is a block diagram which shows the structure of the test control system which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described.
1a and 1b show the configuration of the automobile test system according to the present embodiment by taking as an example the case where the automobile to be tested is a front-wheel steering and front-wheel drive automobile.
As shown in the figure, the automobile test system includes a test control system 1, a sensor 2, a dynamometer 3, a simulated wheel 4, and a steering load device 5.
The test control system 1 uses various in-vehicle sensors included in the sensor 2, the ECU of the automobile 6, and the automobile 6 to determine various states of the automobile 6 such as engine rotation speed, gear shift state, accelerator opening, steering angle, and steering torque. While acquiring various environmental conditions such as the ambient temperature of the automobile 6, the operation of the entire automobile test system is controlled and various measurements related to the automobile 6 to be tested are performed.

Next, four sets of the simulated wheel 4 and the dynamometer 3 are provided corresponding to each of the four hub bearings of the automobile 6, and the simulated wheel 4 is mounted on the corresponding hub bearing instead of the wheel. Supports the hub bearing rotatably. Further, the dynamometer 3 is connected to the corresponding hub bearing, and torque can be applied to the corresponding hub bearing.

Here, the configuration of the simulated wheel 4 will be described with reference to FIG.
FIG. 2a shows the periphery of the hub bearing of the drive wheel (front wheel) of the automobile 6 in the standard state. The standard state refers to the original state in which the automobile 6 can actually run.
As shown in the figure, in the standard state, the outer ring of the hub bearing 71 is fixed to the knuckle 72 and connected to the vehicle body via the knuckle 72. Further, the outer ring of the hub bearing 71 rotatably supports the hub shaft (inner ring), and the drive shaft 73 of the automobile 6 is inserted into the hub shaft so as to rotate together. Further, the wheel of the wheel is fixed to the hub shaft of the hub bearing 71 by using the hub bolt fixed to the flange provided on the outer side of the vehicle body of the hub shaft, and the wheels are the drive shaft 73 and the hub bearing 71. Rotates with the hub shaft of.

FIG. 2b shows the state at the time of the test in which the wheel of the automobile 6 is replaced with the simulated wheel 4.
As shown in the figure, the simulated wheel 4 has a simulated wheel 41, a tire 42 mounted on the outer peripheral side of the simulated wheel 41, and a connecting shaft 43 rotatably supported at the center of the simulated wheel 41.

The inner end of the connecting shaft 43 is fixed to the hub shaft of the hub bearing 71 using a hub bolt, and the outer end of the connecting shaft 43 is connected to the dynamometer 3 by using a coupling 31. Is linked to.

The dynamometer 3 or the simulated wheel 4 includes a torque sensor (not shown) that detects the torque acting between the dynamometer 3 and the hub shaft of the hub bearing 71, and the test control system 1 detects the torque with the torque sensor. It is possible to control the torque acting between the dynamometer 3 and the hub shaft of the hub bearing 71 with reference to the torque generated.

Although not shown, the simulated wheel 4 is fixed to the floor surface by a belt or the like around the simulated wheel 4 at the time of carrying out the test.
According to such a simulated wheel 4, the required load is driven from the dynamometer 3 while rotating the hub shaft and the drive shaft 73 of the hub bearing 71 while supporting the hub bearing 71 of the automobile 6 with respect to the floor surface. It can be given to the shaft 73.

The configuration of the simulated wheel 4 corresponding to the hub bearing 71 of the trailing wheel (rear wheel) of the automobile 6 and the connection relationship between the hub bearing 71 of the trailing wheel and the simulated wheel 4 and the dynamometer 3 are as follows. It is the same as that shown in FIG. 2b except that 73 is not connected, and the trailing wheel (rear wheel) can be rotated at a required rotation speed by the dynamometer 3.

Returning to FIG. 1, the steering load device 5 is provided corresponding to each of the two front wheels to be steered, and applies a load to the corresponding front wheel tie rods.
Here, the configuration of the steering load device 5 will be described with reference to FIG.
FIG. 3a1 shows the surroundings of the hub bearing 71 and the tie rod 74 of the automobile 6 in the standard state seen from above, and FIG. 3a2 shows the hub bearing 71 and the tie rod of the automobile 6 in the standard state seen from the front of the automobile 6. It represents the appearance around 74.

As shown in the figure, in the standard state, the knuckle 72 fixed to the outer ring of the hub bearing 71 is directly or indirectly connected to the strut, lower arm, or the like of the automobile 6 so as to be swingable around a predetermined steering shaft. .. A tie rod 74 that moves in the left-right direction as the steering wheel of the automobile 6 is steered is connected to the knuckle arm 721 of the knuckle 72. Then, as the tie rod 74 moves in the left-right direction, the knuckle 72, the hub bearing 71, and the wheels steer around the steering shaft.

Next, as shown in FIG. 3b, the steering load device 5 includes an actuator 51, an extension member 52, and a connecting portion 53.
The actuator 51 is a device that applies a force to a linearly movable shaft / rod included in the actuator 51, and as such an actuator 51, a linear actuator such as a hydraulic cylinder, an air cylinder, or an electric cylinder can be used.

The extension member 52 is a member that extends upward from the tip of the shaft of the actuator 51 and moves linearly with the shaft. The connecting portion 53 is provided at the upper end portion of the extension member 52, and has a structure that can be connected to the tie rod 74 of the automobile 6.

3c1 and 3c2 show the state at the time of the test in which such a steering load device 5 is connected to the tie rod 74 of the automobile 6, FIG. 3c1 shows the appearance seen from above, and FIG. 3c2 shows the front of the automobile 6. It represents a more visible look.

As shown in the figure, at the time of the test, the tie rod 74 is removed from the knuckle arm 721 of the knuckle 72 of the automobile 6 to disconnect the two. Further, as shown in FIGS. 3a1 and 3a2, the tie rod end 741 constituting the tip portion of the tie rod 74, which is generally screwed and detachably provided for replacement or the like, is removed, and the tie rod end 741 is removed. The connecting portion 53 of the steering load device 5 is connected to the tie rod 74 after the steering. Here, the steering load device 5 is arranged so that a force in the left-right direction of the automobile 6 can be applied to the tie rod 74 from the actuator 51 via the extension member 52 and the connecting portion 53. Further, the connecting portion 53 is connected to the tie rod 74 by using, for example, a female screw provided at the tip end portion of the tie rod 74 for attaching the tie rod end 741.

FIG. 4a shows the relationship between the steering system of the automobile 6 and the steering load device 5 in a state where the steering load device 5 is connected to the tie rods 74 for the left and right front wheels of the automobile 6 as shown in FIGS. 3c1 and 3c2. ..

In the steering system of the automobile 6, the steering column 82 rotates with the rotation of the steering wheel 81 of the automobile 6, and this rotational motion is converted into a linear motion of the steering rack in the left-right direction inside the steering gearbox 83. Tie rods 74 are connected to the left and right ends of the steering rack, and the tie rods 74 also move left and right as the steering rack moves left and right.

Then, in the standard state in which the tie rod 74 is connected to the knuckle arm 721, the knuckle 72, the hub bearing 71, and the front wheels rotate around the steering shaft as the tie rod 74 moves left and right, and as a result, the steering wheel 81 is steered. The front wheels steer according to the situation.

On the other hand, at the time of the test, as shown in FIG. 4a, the tie rod 74 is removed from the knuckle arm 721 and connected to the steering load device 5, so that the hub bearing 71 and the simulated wheel 4 are steered according to the steering of the steering wheel 81. There is nothing to do. Further, as shown in FIGS. 4a, 4a, 4a, 4a, b, and c, a required force can be applied from the steering load device 5 to the steering system of the automobile 6 while allowing the tie rod 74 and the steering rack to move.

Here, the steering load device 5 includes a load sensor such as a load cell that detects a force acting between the actuator 51 and the tie rod 74, and the test control system 1 refers to the force detected by the load sensor. , The force applied from the steering load device 5 to the steering system of the automobile 6 can be controlled.

In the above, the connecting portion 53 is connected to the tie rod 74 from which the tie rod end 741 has been removed. However, when the knuckle arm 721 or the knuckle 72 and the tie rod 74 can be avoided from interfering with each other without removing the tie rod end 741. May connect the connecting portion 53 to the tie rod 74 with the tie rod end 741 attached.

For example, as shown from above in FIG. 5a1 and as seen from the front of the automobile 6 in FIG. 5a2, the tie rod 74 can avoid interference between the knuckle arm 721 and the knuckle 72 and the tie rod 74 due to steering. May be tilted in the front-rear direction of the automobile 6 and then the connecting portion 53 may be connected to the tie rod 74.

Alternatively, as shown in the view from the front of the automobile 6 in FIG. 5b, the tie rod 74 is tilted in the vertical direction of the automobile 6 so as to avoid interference between the knuckle arm 721 and the knuckle 72 and the tie rod 74 due to steering. Above, the connecting portion 53 may be connected to the tie rod 74.

Generally, the tie rod 74 is connected to the steering rack in the steering gearbox 83 by a ball joint, and the inclination with respect to the steering rack can be changed within a certain range.

If interference between the knuckle arm 721 or the knuckle 72 and the tie rod 74 due to steering cannot be avoided by any means, the tie rod 74 is removed from the steering rack of the steering gearbox 83, and the connecting portion 53 of the steering load device 5 is connected. It may be connected to the steering rack instead of the tie rod 74.

In the above, the case where the linear actuator is used as the actuator 51 of the steering load device 5 has been shown, but an actuator other than the linear actuator can be used as long as it is an actuator that realizes an approximate linear motion.

For example, a rotary actuator and a mechanism for converting the rotary motion of the rotary actuator into a linear motion can be used as the actuator 51.
FIG. 6a1 shows an example of such an actuator 51 as viewed from above. The actuator 51 is a link mechanism including a rotary actuator 91 that rotates, a driving link 92, two intermediate links 93, and a driven link 94. As shown in FIGS. 6a2 and 6a3, when the motion direction of the driven link 94 is restricted to the left-right direction of the figure, the driven link 94 rotates when the driven link 92 is rotated by the rotary actuator 91. Perform a linear motion approximately in the left-right direction of the figure.

Here, as shown from the front view of FIG. 6b, in the steering load device 5 provided with the actuator 51 using the rotary actuator 91, an extension member 52 is provided so as to extend upward from the tip of the driven link 94. A connecting portion 53 connected to the tie rod 74 of the automobile 6 is provided at the upper end of the extension member 52.

The actuator 51 is arranged so that the driven link 94 moves substantially in the left-right direction of the automobile 6 with the rotation of the driving link 92 by the rotary actuator 91, and the movement direction of the tie rod 74 is restricted in the left-right direction. By applying a rotational force to the driving link 92 by the rotary actuator 91, a force in the left-right direction of the automobile 6 is applied to the tie rod 74 via the driven link 94, the extension member 52, and the connecting portion 53. If the movement direction of the tie rod 74 is not sufficiently restricted in the left-right direction when the tie rod 74 is separated from the knuckle arm 721 due to the connection with the steering rack by the ball joint, the driven link 94 or the tie rod 74 may be used. A guide that roughly regulates the direction of motion in the left-right direction of the automobile 6 is provided, and a force in the rotational direction is applied to the driving link 92 by the rotary actuator 91, so that a force in the left-right direction of the automobile 6 is applied from the rotary actuator 91 to the tie rod 74. You can do it.

Next, the configuration of the test control system 1 is shown in FIG.
As shown in the figure, the test control system 1 has a simulation control unit 11 and a measurement unit 12.
The simulation control unit 11 includes a test condition setting unit 111, a vehicle model 112, a dynamometer control unit 113, and a steering load control unit 114.
The test condition setting unit 111 sets test conditions such as a road surface condition, an inclination, an air temperature, and a wind speed in the vehicle model 112.
The vehicle model 112 is a model of the automobile 6 to be tested, and includes each condition indicated by the test conditions, the engine rotation speed, the gear shift state, the accelerator opening, the steering angle, and the steering acquired from the sensor 2 and the automobile 6. By inputting various states of the automobile 6 such as torque, the behavior of the automobile 6 and the external force applied to the automobile 6 are simulated, and under the conditions indicated by the test conditions, each front wheel of the automobile 6 responds to various states of the automobile 6 and its changes. From, the load applied to each drive shaft 73, the rotational state of each rear wheel of the automobile 6, and the force applied to the steering system from each front wheel of the automobile 6 are calculated.

Then, the dynamometer control unit 113 is provided on the hub bearing 71 of each front wheel so that the same load as the load applied to each drive shaft 73 from each front wheel calculated by the vehicle model 112 is applied to each drive shaft 73. The torque generated by each dynamometer 3 is controlled with reference to the torque detected by the torque sensor provided in the dynamometer 3 or the torque sensor provided between the hub bearing and the dynamometer 3. Further, the dynamometer control unit 113 is provided for the hub bearing 71 of each rear wheel so that the hub shaft of each rear wheel rotates in a rotational state that matches the rotational state of each rear wheel calculated by the vehicle model 112. The rotation speed of each dynamometer 3 is controlled.

Further, the steering load control unit 114 uses a steering load device to generate a force generated by each actuator 51 so that the same force applied to the steering rack from each front wheel of the automobile 6 calculated by the vehicle model 112 is applied to the steering rack. It is controlled while referring to the force detected by the load sensor provided in 5.

By such an operation of the simulation control unit 11, the dynamometer 3 is used to simulate the running load of the automobile 6 during actual running, and the actuator 51 is used to react to the steering of the actual automobile 6 during running. It is possible to correctly simulate the force applied to the steering system from each wheel.

Next, during the test execution, the measurement unit 12 measures various states of the automobile 6 acquired from the sensor 2 and the automobile 6, the behavior shown by the vehicle model 112, and the like, and performs necessary analysis on the measurement result.

According to the automobile test system according to the present embodiment, various tests related to the steering of the automobile 6 can be performed.
For example, since it is possible to consider the steering reaction force when the vehicle is driven, as in the automatic driving characteristic test, verification of control logic (including verification of EPS etc.) from follow-up and responsiveness to the target value. It will be possible to test the verification of driving and driving, fuel consumption / electricity cost / exhaust gas, etc. with good reproducibility and in a state closer to actual road driving.

Besides that, steady circular turning test, accelerated circular turning test, turning power-off test, letting go stability test, lane change test, slalom test, straight running stability test, frequency response test, crosswind stability test, J-turn test, limit Stability test-Overturn test, steering force test, and various other tests (fuel consumption / electricity cost, drivability, various control logic, exhaust gas verification, evaluation, etc. in various driving scenes), driving load and steering reaction by simulating vehicle behavior By reflecting it in the force, it becomes possible to carry out the test even when the vehicle is fixed.

The embodiment of the present invention has been described above.
In the above, the case where the vehicle 6 to be tested is a vehicle 6 with front wheel steering has been shown, but when the vehicle 6 to be tested is a vehicle 6 with rear wheel steering, the steering load device 5 is applied to the rear wheels. If the vehicle 6 to be tested is a four-wheel steering vehicle 6, a steering load device 5 is provided not only for the front wheels but also for the rear wheels.

Further, in the above, the dynamometer 3 is provided for all the wheels of the automobile 6, but if there is no problem in the control of the automobile 6 even if the trailing wheel of the automobile 6 is stopped, the drive wheels are provided. The dynamometer 3 may be provided only for the wheel.

Further, although it has been described that the steering load device 5 is provided for all the wheels to be steered, the steering load device 5 is provided for only one of the two wheels connected to one steering rack, and this one. The steering load device 5 may simulate the force applied to the steering rack from the left and right wheels / tie rods during actual driving.

In the above embodiment, the case where the dynamometer 3 connected to the hub shaft simulates the action of the road surface or the like on the wheels of the automobile 6 has been described, but the steering load device 5 of the present embodiment adds to the steering system. The configuration that simulates the force simulates the action on the wheels of the automobile 6 from the outside such as the road surface by another configuration such as a chassis dynamometer equipped with a roller on which the wheels are placed and a dynamometer connected to the rollers. It can be applied to automobile test systems as well.

In addition, the configuration that simulates the driving load of the above automobile test system during actual driving and the force applied to the steering system is simulated by a field simulation device that simulates the driver's field of view during actual driving and the sound that the driver hears during actual driving. A real road driving simulator (driving simulator) using the automobile 6 can be configured by combining with an acoustic simulation device, a vibration simulation device that simulates vibration applied to the driver during actual driving, and the like. According to such a real road driving simulator, the driving load and the steering reaction force at the time of actual driving can be simulated by using the actual vehicle, so that the virtual driving experience of the driver's vehicle can be made more realistic.

1 ... test control system, 2 ... sensor, 3 ... dynamometer, 4 ... simulated wheel, 5 ... steering load device, 6 ... automobile, 11 ... simulation control unit, 12 ... measurement unit, 31 ... coupling, 32 ... shaft, 41 ... simulated wheel, 42 ... tire, 43 ... connecting shaft, 51 ... actuator, 52 ... extension member, 53 ... connecting part, 71 ... hub bearing, 72 ... knuckle, 73 ... drive shaft, 74 ... tie rod, 81 ... handle, 82 ... Steering column, 83 ... Steering gearbox, 91 ... Rotary actuator, 92 ... Primary link, 93 ... Intermediate link, 94 ... Driven link, 111 ... Test condition setting unit, 112 ... Vehicle model, 113 ... Dynamometer control unit, 114 ... Steering load control unit, 721 ... Knuckle arm, 741 ... Tie rod end.

Claims (7)

An automobile test system used for automobile testing.
A torque load device that applies a load to the drive shaft by applying torque to the hub shaft of the wheel or hub bearing of the automobile.
The tie rod or steering rack of the vehicle that has been disconnected from the knuckle arm of the knuckle of the vehicle that supports the hub bearing of the vehicle is connected to the connection target, and a force is applied to the connection target. An automobile test system characterized by being equipped with a steering load device that applies force to the steering rack of the automobile. The automobile test system according to claim 1.
The torque load device is an automobile test system characterized by being a dynamometer connected to a hub shaft of a hub bearing of an automobile supported rotatably and applying a load to the drive shaft by applying torque to the hub shaft. .. The automobile test system according to claim 2.
A plurality of the dynamometers are provided corresponding to at least each of the wheels that are the driving wheels of the automobile, and each dynamometer is connected to the hub shaft of the hub bearing of the corresponding wheel to apply torque to the hub shaft. By adding a load to the drive shaft,
The steering load device is provided corresponding to each of the wheels to be steered by the vehicle, and each steering load device is connected to the knuckle arm of the knuckle of the vehicle that supports the hub bearing of the corresponding wheel. An automobile test system characterized in that a tie rod or steering rack of the released automobile is used as an object to be connected and is connected to the object to be connected, and a force is applied to the steering rack of the automobile by applying a force to the object to be connected. .. The automobile test system according to claim 1, 2 or 3.
The steering load device is an automobile test system characterized by having a connecting portion connected to the connecting object and an actuator for moving the connecting portion at least in the left-right direction of the automobile. The automobile test system according to claim 1, 2, 3 or 4.
The automobile test system, wherein the object to be connected is a tie rod with the tie rod end removed. The automobile test system according to claim 1, 2, 3, 4 or 5.
The torque generated by the torque load device is controlled so that the same load as the load applied to the drive shaft is applied to the drive shaft when the automobile actually runs under the conditions indicated by the set test conditions, and the test conditions are used. The automobile test system is characterized by having a control unit that controls the force generated by the steering load device so that the force applied to the steering rack from the wheels when the automobile actually travels under the conditions shown in the above. .. It is a real road driving simulator that simulates the actual driving state of a car.
A torque load device that applies a load to the drive shaft by applying torque to the hub shaft of the wheel or hub bearing of the automobile.
The tie rod or steering rack of the automobile that has been disconnected from the knuckle arm of the knuckle of the automobile that supports the hub bearing of the automobile is connected to the connection object, and a force is applied to the connection object. A steering load device that applies force to the steering rack of the vehicle,
A real road running simulator including a control unit that controls the torque generated by the torque load device and the force generated by the steering load device according to the state of the automobile.

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