WO2024064982A1 - Lenkkraftmodul für einen antriebsstrangprüfstand - Google Patents
Lenkkraftmodul für einen antriebsstrangprüfstand Download PDFInfo
- Publication number
- WO2024064982A1 WO2024064982A1 PCT/AT2023/060333 AT2023060333W WO2024064982A1 WO 2024064982 A1 WO2024064982 A1 WO 2024064982A1 AT 2023060333 W AT2023060333 W AT 2023060333W WO 2024064982 A1 WO2024064982 A1 WO 2024064982A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- steering
- drive train
- force
- tie rod
- test bench
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/027—Test-benches with force-applying means, e.g. loading of drive shafts along several directions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/06—Steering behaviour; Rolling behaviour
Definitions
- the invention relates to a steering force module for use on a drive train test bench for a drive train of a vehicle with at least one steerable wheel suspension and a steering system, wherein the steering force module is designed to generate a steering counterforce that counteracts a steering force that can be exerted by the steering system on a tie rod of the steering system.
- the invention further relates to a drive train test bench, a use of the drive train test bench and a method for operating a drive train test bench.
- Drive train test benches are well known in the state of the art and are used to carry out test runs with drive trains of mostly multi-track vehicles. Either just the drive train can be set up on the test bench or an entire vehicle with drive train can be set up. In both cases, the original wheels have been removed from the wheel suspensions, so that only the wheel suspension or at least a part of the wheel suspension relating to the drive is present.
- a number of load machines for example in the form of asynchronous machines, are provided on the drive train test bench.
- the available loading machines can be controlled by a control unit in order to carry out desired test runs, e.g. a legally required test run or a desired, definable speed-torque curve.
- the loading machines are fixed to the test bench, for example bolted to a foundation.
- the loading machines can be connected to the available wheel suspensions via connecting shafts, usually in a form-fitting manner.
- the connecting shaft can be connected to a wheel hub of the wheel suspension, which is rotatably mounted in a steering knuckle of the wheel suspension by means of a wheel bearing.
- the wheel hub can in turn be connected to a drive shaft of the drive train.
- suitable bearing blocks can also be provided between the drive train and the loading machine to support the connecting shaft and/or the wheel suspension.
- a steerable wheel suspension of a steered axle is connected to a load machine, then the wheel suspension is usually fixed in the neutral position (straight position). This means that no steering movement is possible on the test bench. Steering functions therefore generally cannot be tested on a conventional powertrain test bench. However, it may be desirable to also test certain steering functions on a powertrain test bench. However, the test bench naturally lacks the reaction forces that act on the drive train during real driving on the road, for example a restoring force that acts on the steered wheels when cornering.
- the object is achieved with the steering force module mentioned at the outset in that the steering force module has a force transmission unit with an outer part and an inner part which can be rotated about an axis of rotation relative to the outer part, the inner part being rotatably connected to a rotatable part of the wheel suspension, at least a section of the Outer part is movable in at least one additional degree of freedom of movement relative to the inner part, wherein on the movable section of the outer part an attachment point is provided for attaching a tie rod end of the tie rod that is detached from the wheel suspension of the vehicle and wherein the steering force module has at least one force generation unit for generating the steering counterforce, wherein the force generation unit has a fixed part and a moving part that is movable relative thereto, the fixed part being at a fixed assembly point of the Drive train test bench or at a drive train-fixed or vehicle-fixed assembly point and the moving part is connected at a connection point to the movable section of the outer part of the power transmission unit, the steering counter
- the movable section of the outer part preferably covers the entire outer part. This can increase stability and simplify the construction.
- the at least one additional degree of freedom of movement has at least one rotational degree of freedom of movement, preferably at least two rotational degrees of freedom of movement, or at least one translational degree of freedom of movement.
- the at least one rotational degree of freedom of movement can be formed by a swivel joint or a ball joint.
- the at least one translational degree of freedom of movement can be formed by a linear guide.
- the steering force module comprises a test rim, wherein the movable section of the outer part is connected in an articulated manner to the test rim, with a tire preferably being mounted on the test rim.
- the steering force module can be used on the drive train test bench mentioned at the beginning, whereby the original test wheel can be replaced by the test rim according to the invention including tires.
- the design is advantageous because the real wheel contact forces take effect.
- the power transmission unit has a swash plate, the inner part of the power transmission unit being formed by an inner ring of the swash plate and the outer part of the power transmission unit being formed by an outer ring of the swash plate, the outer ring being able to pivot around the inner ring in a swash plate movement.
- the outer ring of the swash plate can preferably be connected to the inner ring by means of a self-aligning bearing. This creates a simple and robust design with three rotational degrees of freedom of movement. This means that the steering power module can be used very flexibly.
- the force generating unit is preferably designed as an active force generating unit, which has at least one electrically controllable actuator, or it is designed as a passive force generating unit, which has at least one suspension unit and/or at least one damping unit.
- An active force generating unit enables a very variable and precise generation of the steering counterforce.
- a passive On the other hand, the power generation unit allows for a very simple design that does not require an external power supply.
- the at least one electrically controllable actuator of the active force generation unit preferably comprises a linear actuator, wherein the linear actuator preferably has one of the following actuators: linear motor, pneumatic cylinder, hydraulic cylinder, electric motor with gear. This means that known and reliable actuators can be used to generate the steering counterforce.
- the suspension device can have a linear, progressive or degressive spring characteristic.
- the suspension device can have an adjustment device for changing a suspension characteristic.
- the suspension device preferably has at least one of the following springs: bending spring, torsion spring, air spring, rubber spring, gas pressure spring.
- the damping device can, for example, have an adjustment device for adjusting a damping characteristic.
- the damping device advantageously has at least one of the following dampers: friction damper, hydraulic damper, rubber damper.
- the passive force generation unit can advantageously have a compression stage and/or a rebound stage. This allows the desired direction of action of the steering counterforce to be determined. If compression and rebound are provided, the steering counterforce can be generated in both directions.
- the rotating part of the wheel suspension to which the inner part of the power transmission unit can be connected in a rotationally fixed manner, is preferably a drive shaft or a wheel hub. This enables flexible mounting of the steering power module on the wheel suspension.
- the moving part of the at least one force generating unit is preferably connected in an articulated manner to the movable section of the outer part at the connection point.
- the fixed part of the at least one force generating unit can be connected in an articulated manner to the stationary component of the drive train test bench at the mounting point and/or if the fastening point is designed for the articulated fastening of the tie rod end of the tie rod.
- connection point of the moving part on the moving section of the outer part is adjustable and/or if a position of the attachment point for the tie rod end on the moving section of the outer part is adjustable.
- the connection point of the moving part and the fastening point for the tie rod end are preferably arranged on opposite end faces of the movable section of the outer part (with respect to the axis of rotation).
- the connection point of the moving part and the fastening point for the tie rod end can also be arranged at different locations in the radial direction and/or in the circumferential direction with respect to the axis of rotation.
- the steering force module according to the invention is preferably used on a drive train test bench for a drive train of a vehicle with at least one steerable wheel suspension, wherein at least one loading machine is provided on the drive train test bench for applying a drive or loading torque to a drive shaft of the wheel suspension of the drive train and wherein a control unit is provided for controlling the loading machine.
- the control unit is preferably designed to control the at least one actuator of the active force generating unit to generate the steering counterforce. This provides a drive train test bench on which a steering counterforce can be generated in a simple manner.
- the drive train test bench is preferably designed for a drive train of a multi-track vehicle with at least one steered drive axle with two steerable wheel suspensions, the steering force module being provided for at least one of the two steerable wheel suspensions.
- a steering force module is preferably provided for each of the two steerable wheel suspensions.
- a simulation unit for simulating the steering counterforce is provided on the drive train test bench and the control unit is designed to control the at least one actuator of the active force generation unit depending on a target steering counterforce determined by the simulation unit. This means that a desired steering counterforce can be simulated on the test bench, which enables a very good representation of real driving.
- a detection device for detecting a measurement variable representative of an actual steering counterforce can also be provided on the drive train test bench, and the control unit can have a controller which is designed to determine a control variable from the target steering counterforce determined by the simulation unit and the measurement variable detected by the detection device.
- the control unit is preferably designed to connect the at least one actuator of the active force generation unit to the determined control variable. This allows a desired steering counterforce to be regulated.
- the task is further solved with a method according to claim 20.
- Fig.1 an exemplary drive train test bench with a built-up drive train of a vehicle
- FIG. 2a shows a steering force module according to the invention in an exemplary embodiment with an active force generation unit
- Fig.2b shows a section of the steering force module according to the invention in an exemplary embodiment with a passive force generating unit.
- a schematic drive train test bench 1 is shown in a view from above.
- the drive train test bench 1 shown is designed for use with a drive train 3 of a two-axle and two-track vehicle 2.
- the drive train test stand 1 could of course also be designed for testing drive trains 3 with more than two axles or for testing a part of a drive train 3, such as a single wheel suspension.
- the drive train 3 shown in Fig.1 is designed as an example as a drive train 3 of a vehicle 2 with a driven front axle VA and front axle steering.
- the drive train 3 thus has a driven front axle VA with two steerable wheel suspensions 4 and a non-driven rear axle HA with two non-driven and non-steerable wheel suspensions 4.
- this is only an example and the drive train 3 could also have, for example, a non-driven front axle VA with steerable wheel suspensions 4 and a driven rear axle HA with non-steerable wheel suspensions 4.
- An all-wheel drive train 3 and all-wheel steering would of course also be conceivable.
- the drive train 3 here has a drive unit 5, e.g. a combustion engine or electric motor, which drives the driven front axle VA via a suitable transmission 6.
- a differential gear 7 is also provided on the front axle VA, which is connected to the wheel suspensions 4 via drive shafts 8 in order to increase the drive power.
- the wheel suspensions 4 can, for example, each have a steering knuckle 9 on which a wheel hub (not shown) is rotatably mounted by means of a wheel bearing.
- the drive train 3 also has a steering system 10 for the steered front axle VA.
- the steering system 10 includes a steering wheel 11, which is connected to a steering gear 13 via a steering linkage 12.
- the steering gear 13 is in turn connected to the wheel suspensions 4 of the front axle VA via two tie rods 14, in particular with articulation points provided for this purpose on the steering knuckles 9.
- a steering force FL can be transmitted to the tie rods 14 via the steering system 10, whereby the steering knuckles 9 can be deflected .
- the design of the drive train 3 is of course only to be understood as an example and is simplified.
- another steering system 10 would also be possible, which, for example, has no mechanical connection between the steering wheel 11 and the steering gear 12 (so-called steer-by-wire).
- the steering system 10 does not necessarily have to have a steering wheel 11 and a steering linkage 12.
- the steering force FL could be generated, for example, via a steering actuator (not shown) of the steering gear 13.
- a loading machine 15 is provided for each wheel suspension 4 for applying a drive or loading torque.
- the loading machine 15 can have a suitable electrical machine such as an asynchronous machine in a known manner.
- a loading machine 15 can be connected to the respective wheel suspension 4 in a rotationally fixed manner by means of a connecting shaft 16 in order to transmit the torque provided by the loading machines 15 to the drive shafts 8 of the wheel suspension 4.
- the connecting shafts 16 can be connected, preferably in a form-fitting manner, to the wheel suspensions 4, in particular to the wheel hub, for example via a screw flange.
- the wheel hubs are connected to the drive shaft 8.
- suitable bearing blocks can also be provided to support the connecting shaft 16 or the wheel suspension 4.
- test wheel can be replaced, for example, by a test wheel PR according to the invention, which is indicated in dashed lines in Fig. 2a and is described in more detail below. This allows the wheel contact force to continue to appear realistic.
- a control unit 17 is also provided on the drive train test bench 1, which is designed to control the loading machines 11 to carry out a test run.
- the control unit 17 can have suitable hardware and/or software.
- the control unit 17 can be used to predetermine a desired test run in order to simulate certain driving conditions of the drive train 3.
- the test run can be specified, for example, in the form of a temporal progression of setpoint values SW, e.g. setpoint speed or setpoint torque.
- a suitable control device can also be provided to regulate the setpoint values SW.
- the test run can be used to simulate desired resistances that act on the drive train 3 during real driving, for example inclines or declines of a road or twists.
- a steering force module 18 (not shown in Fig. 1) is provided according to the invention, which is described in detail below with reference to Fig. 2a + 2b.
- Fig. 2a shows a section of the drive train test bench 1 in the area of the left front wheel suspension 4.
- the loading machine 15 and part of the connecting shaft 16 are shown cut off.
- a part of the drive shaft 8 of the drive train 3 and a part of the steering gear 13 are also shown cut off.
- a steering force module 18 according to the invention is provided on the wheel suspension 4 in an exemplary embodiment.
- the steering force module 18 is designed to generate a steering counterforce FG that counteracts the steering force FL that can be exerted on a tie rod 14 by the steering system 10.
- the steering force module 18 has a force transmission unit 19 with an outer part 19a and an inner part 19b which is rotatable relative to the outer part 19a about an axis of rotation DA.
- the inner part 19b is connected in a rotationally fixed manner to a rotatable part of a wheel suspension 4 and can rotate with it, while the outer part 19a is stationary (in the direction of rotation).
- the original steering knuckle 9 including the wheel hub of the wheel suspension 4 is removed and replaced by the power transmission unit 19.
- the inner part 19b thus essentially replaces the wheel hub.
- the inner part 19b is connected to the axial end face
- Connecting shaft 16 of the loading unit 15 is connected and connected to the drive shaft 8 on the opposite end face.
- the connecting shaft 16 can, for example, be screwed to the inner part 19b via a suitable flange 16b.
- the drive shaft 8 can be connected to the inner part 19b via a suitable shaft-hub connection, for example via a toothing.
- the embodiment shown is only an example and the inner part 19b could, for example, also be connected directly to the drive shaft 8 or the original wheel hub, so that if necessary only the steering knuckle 9 has to be removed and the original wheel hub can continue to be used.
- At least a portion of the outer part 19a is movable relative to the inner part 19b in at least one additional degree of freedom of movement (in addition to rotation about the rotation axis DA).
- This at least one additional degree of freedom of movement can, for example, have at least one rotational degree of freedom of movement or at least one translational degree of freedom of movement.
- the at least one rotational degree of freedom of movement can be realized, for example, by a swivel joint or a ball joint.
- the at least one translational degree of freedom of movement can be realized, for example, by a linear guide.
- the at least one additional degree of freedom of movement is selected so that the movable section of the outer part 19a can follow a deflection of the tie rod 14.
- the movable section of the outer part 19a includes the entire outer part 19a and the at least one additional degree of freedom of movement includes two rotational degrees of freedom of movement.
- the force transmission unit 19 is thus designed as a type of swash plate, with the inner part 19b of the force transmission unit 19 being formed by an inner ring of the swash plate and the outer part 19a of the force transmission unit 19 being formed by an outer ring of the swash plate.
- the outer ring 19a can thus be pivoted in a wobbling movement around the inner ring 19b.
- the outer ring 19a therefore has a first rotational degree of freedom of movement relative to the inner ring 19b, in that the inner ring 19b is rotatable about the axis of rotation DA relative to the outer ring 19a.
- the axis of rotation DA also corresponds to the common axis of rotation of the connecting shaft 16 and the drive shaft 8 and runs here in the X direction.
- the second rotational degree of freedom of movement corresponds to a rotation of the outer ring 19a about the Y-axis and the third second rotational degree of freedom of movement corresponds to a rotation of the outer ring 19a about the Z-axis. This means that the outer ring 19a can be rotated around a pivot point DP around all three axes X, Y, Z.
- the outer ring 19a can be connected to the inner ring 19b, for example by means of a self-aligning bearing 26.
- the self-aligning bearing 26 can be, for example, a self-aligning ball bearing or a self-aligning roller bearing, such as shown as an example in Fig.2. While unrestricted rotation around the X-axis is possible, the other two rotational degrees of freedom are restricted, so that only a limited angle of deflection is possible.
- the second and third rotational degrees of freedom in this design are not restricted to rotation around the Y-axis and rotation around the Z-axis, but that essentially rotation around any axis in the YZ plane is possible, analogous to a ball joint.
- the second and third rotational degrees of freedom of movement could also be implemented, for example, by a universal joint.
- the outer ring 19a could be connected to an intermediate ring via a first rotary joint, for example, and the intermediate ring could be connected to the inner ring 19b via a second rotary joint, with the axes of rotation of the two rotary joints being perpendicular to one another.
- the axis of rotation of the first rotary joint could run in the Y direction and the axis of rotation of the second rotary joint in the Z direction. In this case, the rotation would be limited to the Y axis and Z axis.
- a fastening point BP is also provided for fastening a tie rod end 14a of the tie rod 14, which is detached from the wheel suspension 4.
- the outer ring of the swash plate forms the movable section of the outer part 19a.
- the fastening point BP is located with respect to the axis of rotation DA on an end face of the outer ring facing the tie rod 14.
- test wheel PR in which the power transmission unit 19 is integrated.
- the movable outer part 19a of the power transmission unit 19 is connected to the test rim PF in an articulated manner, for example by means of a suitable bearing 27.
- the outer part 19a can be pivoted relative to the inner part 19b on the one hand and relative to the test rim PF on the other.
- a tire R is preferably arranged on the test rim PF, via which the test wheel PR is supported on the floor of the test bench.
- the connecting shaft 16 in this embodiment is guided centrally through the test rim and connected to the drive shaft 8.
- the bearing 27 is only schematically indicated in Fig.2a and can be designed as a joint bearing, for example.
- the test rim PF (including tire R) is stationary and the connecting shaft 16 and the drive shaft 8 rotate relative to the test rim PF and also relative to the movable outer part 19a of the power transmission unit. 19.
- the outer part 19a can additionally be pivoted relative to the test rim PF and relative to the inner part 19b.
- the steering force module 18 also has at least one force generating unit 20 for generating the steering counterforce FG.
- the force generating unit 20 has a fixed part 21 and a moving part 22 that is movable relative thereto.
- the fixed part 21 is connected here to a stationary mounting point MP of the drive train test bench 1.
- the stationary mounting point MP of the drive train test bench 1 can be arranged, for example, on a console provided for this purpose on a suitable stationary structure of the drive train test bench 1.
- the connection is preferably designed to be detachable, e.g. by means of a screw connection.
- a variable position of the stationary mounting point MP on the drive train test bench 1 can also be advantageous in order to be able to change the position of the fixed part 21.
- the fixed part 21 is in any case fixed in place again, e.g. by tightening the screws.
- the moving part 22 of the force generating unit 20 is connected at a connection point VP to the movable section of the outer part 19a, which is formed here by the outer ring of the swash plate.
- the connection point VP lies with respect to the axis of rotation DA on an end face of the movable section of the outer part 19a, here the outer ring of the swash plate, opposite the attachment point BP for the tie rod head 14a.
- the steering counterforce FG generated by the at least one force generating unit 20 can thus be transmitted to the tie rod 14 via the moving part 22 and the movable section of the outer part 19a, so that the steering counterforce FG counteracts the steering force FL transmitted from the steering system 10 to the tie rod 14.
- connection point VP of the moving part 22 and the attachment point BP for the tie rod head 14a could of course also be arranged at different locations in the radial direction and/or in the circumferential direction with respect to the axis of rotation DA or the pivot point DP.
- the fixed part 21 could also be connected to a drive train-fixed mounting point MP' of the drive train 3 or to a vehicle-fixed mounting point MP' if an entire vehicle 2 is used as a test object.
- the mounting point MP' could, for example, be arranged at a suitable position on the underbody of a body of the vehicle 2 and the fixed part 21 of the force generation unit 20 (indicated by dashed lines) could, for example, be screwed to the underbody.
- the connection point VP' could also be arranged on the same front side of the outer ring as the fastening point BP for the tie rod 14, for example diametrically opposite the fastening point BP with respect to the axis of rotation DA.
- a radial distance between the connection point VP' and the axis of rotation DA or the pivot point DP could in this case serve as a lever arm for transmitting the steering counterforce FG to the tie rod 14.
- the at least one force generation unit 20 is designed as an active force generation unit and includes an electrically controllable actuator.
- the actuator is designed here in particular as a linear actuator, the moving part 22 of which can be moved translationally relative to the fixed part 21.
- the linear actuator can include, for example, an electric linear motor, a pneumatic cylinder, a hydraulic cylinder or an electric motor with a gear (servo motor). In principle, however, other suitable actuators would also be conceivable, for example a rotary electric motor that acts via a lever arm as a moving part 22 that acts on the connection point VP.
- the actuator can be controlled by a control unit, in particular by the control unit 17 of the test bench 1, as will be described further below.
- the force generating unit 20 can also be designed as a passive force generating unit and have at least one suspension unit F and/or at least one damping unit D.
- the passive force generating unit 20 has both a suspension unit F and a damping unit D as an example only.
- the suspension unit F and the damping unit D are shown schematically and can be designed in a suitable manner to generate the desired steering counterforce FG.
- the passive force generating unit 20 does not require control by a control unit; instead, the steering counterforce FG is essentially a reaction force that results from the structural design of the suspension unit F or the damping unit D.
- the suspension device F can, for example, have a linear, progressive or degressive spring characteristic. Alternatively or additionally, the suspension device F could also have an adjustment device (not shown) for changing a suspension characteristic.
- the suspension device F can essentially have any suitable spring, for example at least one of the following types of springs: bending spring, torsion spring, air spring, rubber spring, gas pressure spring.
- the damping device D can also have an adjustment device for adjusting a damping characteristic.
- the damping device D can also have any suitable damper, for example one of the following dampers: friction damper, hydraulic damper, rubber damper.
- the passive force generation unit has a compression stage and/or a rebound stage, preferably both.
- the fixed part 21 of the at least one force generating unit 20 can also be connected or connectable in an articulated manner to the stationary component of the drive train test bench 1 at the assembly point MP.
- the fastening point BP can also be designed for the articulated fastening of the tie rod end 14a of the tie rod 14.
- the expert can select a suitable structural design of the articulated connection, e.g. swivel joint, ball joint or the like.
- connection point VP of the moving part 22 on the movable section of the outer part 19a is adjustable and/or if a position of the fastening point BP for the tie rod end 14a on the movable section of the outer part 19a is adjustable.
- the control unit 17 is preferably designed not only to control the loading machines 15 (and any other functions of the test bench), but also to control the at least one actuator the active force generation unit to generate the steering counterforce FG.
- a separate control unit could also be provided for controlling the at least one actuator of the active force generation unit, which can be part of the steering force module 18, for example.
- the steering force module 18 could, for example, be operated independently of the remaining functions of the drive train test bench 1.
- the separate control unit could also be connected to the control unit 17 of the drive train test bench 1 via a suitable communication connection, so that the steering counterforce FG can be controlled via the control unit 17 of the drive train test bench 1.
- a simulation unit 23 can also be provided for simulating the steering counterforce FG and the control unit 17 can be designed to control the at least one actuator of the active force generation unit depending on one of the simulation unit
- a detection device 24 can also be provided for detecting a measured variable M representative of an actual steering counterforce FGJst and the control unit 17 can have a controller 25 which is designed to use the target steering counterforce FG_soll determined by the simulation unit 23 and the to determine a manipulated variable X recorded by the detection device 24.
- the control unit 23 can then control the at least one actuator of the active force generation unit with the determined manipulated variable X head for.
- a control loop for regulating a specific steering counterforce FG can be implemented. Any suitable controller can be used as controller 25, for example PI controller or PID controller, etc.
- a second, preferably identically designed, steering force module 18 could of course also be provided for the right wheel suspension (not shown) of the front axle VA.
- the right tie rod 14 of the steering gear 13 would be connected to the attachment point BP of the second (not shown) steering force module 18.
- a steering counterforce FG can be exerted on the steering system 10 on both sides. If necessary, different steering counterforces FG can of course be generated on both sides, for example at the same time, in order to be able to reproduce reality as well as possible.
- the (not shown) tie rod 14 of the right front wheel suspension 4 could, for example, only be detached from the steering knuckle 9 and remain in the detached state.
- the common steering counterforce FG for both sides could only be generated by the steering force module 18 on the left side.
- a drive train 3 with at least one steerable wheel suspension 4 and with a steering system 10 (or an entire vehicle 2 with drive train 3) is set up in a suitable manner on the test bench 1.
- the tie rod head 14a of the tie rod 14 of the steering gear 13 of the steering system 10 is then detached from the wheel suspension 4, in particular from the steering knuckle 9, and the steering knuckle 9, possibly including the rotatable wheel hub, is removed from the wheel suspension 4.
- the inner part 19b of the power transmission unit 19 of the steering force module 18 is then connected in a rotationally fixed manner to a rotatable part of the wheel suspension 4 and the loading machine 15 is connected directly or indirectly to the drive shaft 8 of the wheel suspension 4 via the connecting shaft 16.
- the rotating part of the wheel suspension 4 can, for example, be the drive shaft 8 itself, as shown in Fig.2, but could also be the wheel hub, provided that this was not removed with the steering knuckle 9.
- the direct connection of the connecting shaft 16 with the drive shaft 8 can mean that the connecting shaft 16 is directly, i.e. without an intermediate component to the drive shaft 8, e.g. via a suitable shaft/hub connection such as a gear.
- Indirect connection can mean that the connecting shaft 16 is indirectly connected to the drive shaft 8 via a component, for example the wheel hub, e.g. if only the steering knuckle 9 has been removed and the wheel hub remains on the wheel suspension 4.
- Indirect can also mean that the wheel hub is replaced by the inner part 19b of the power transmission unit 19 and the connecting shaft 16 is connected to the inner part 19b on one axial end face of the inner part 19b and the drive shaft 8 is connected to the opposite end face, as shown in Fig.2.
- the fixed part 21 of the power generation unit 20 of the steering force module 18 can be connected to a fixed mounting point MP of the drive train test bench 1 or to a drive train-fixed mounting point MP' of the drive train 3 or to a vehicle-fixed mounting point MP' of the vehicle.
- the fixed part 21 could also be pre-assembled if necessary.
- the previously loosened tie rod end 14a of the tie rod 14 is attached to the attachment point BP of the movable section of the outer part 19a of the power transmission unit 19 (e.g. the outer ring of the swash plate). This completes the assembly and the test run can begin.
- a drive or loading torque can be transmitted to the drive shaft 8 with the loading machine 15.
- a steering force FL can then be exerted on the tie rod 14 and with the at least one (passive or active) force generating unit 20 of the steering force module 18 a steering counterforce FG can be generated, which corresponds to the steering force FL counteracts.
- an active force generation unit is used, then both the loading machine 15 and the actuator of the active force generation unit can be controlled, for example, via the central control unit 17 of the drive train test bench 1. If only the drive train 3 (i.e.
- the steering force FL can also be generated, for example, via any existing steering actuator (not shown) of the steering system 10, in particular of the steering gear 13.
- the steering actuator can, for example, be part of a power steering system and can also be controlled via the control unit 17, for example.
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Abstract
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE112023002937.7T DE112023002937A5 (de) | 2022-09-28 | 2023-09-26 | Lenkkraftmodul für einen Antriebsstrangprüfstand |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ATA50746/2022 | 2022-09-28 | ||
| ATA50746/2022A AT526343B1 (de) | 2022-09-28 | 2022-09-28 | Lenkkraftmodul für einen Antriebsstrangprüfstand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024064982A1 true WO2024064982A1 (de) | 2024-04-04 |
Family
ID=88316035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/AT2023/060333 Ceased WO2024064982A1 (de) | 2022-09-28 | 2023-09-26 | Lenkkraftmodul für einen antriebsstrangprüfstand |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | AT526343B1 (de) |
| DE (1) | DE112023002937A5 (de) |
| WO (1) | WO2024064982A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119738186A (zh) * | 2024-11-29 | 2025-04-01 | 中国汽车工程研究院股份有限公司 | 一种通用化的转向机异响性能测试台架 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4208014A1 (de) * | 1992-03-13 | 1993-02-18 | Daimler Benz Ag | Strassensimulationspruefstand fuer fahrzeugachsen |
| GB2385032A (en) * | 1999-09-03 | 2003-08-13 | Mts System Corp | Loading assembly for a vehicle spindle test fixture |
| DE102012101613A1 (de) * | 2011-12-22 | 2013-06-27 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Prüfstand für Kraftfahrzeuge |
| WO2018046609A1 (de) | 2016-09-12 | 2018-03-15 | Avl List Gmbh | Modularer prüfstand für fahrbereite gesamtfahrzeuge |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5465615A (en) * | 1994-04-28 | 1995-11-14 | Mts Systems Corporation | Loading assembly for a vehicle spindle test fixture |
| US6640638B1 (en) * | 1999-09-03 | 2003-11-04 | Mts Systems Corporation | Loading assembly for a vehicle spindle test fixture |
| DE102004063041A1 (de) * | 2004-12-22 | 2006-07-06 | Schenck Final Assembly Products Gmbh | Fahrzeugfunktionsprüfstand |
| JP7431145B2 (ja) * | 2020-11-20 | 2024-02-14 | 株式会社小野測器 | 自動車試験システム及び実路走行シミュレータ |
-
2022
- 2022-09-28 AT ATA50746/2022A patent/AT526343B1/de active
-
2023
- 2023-09-26 WO PCT/AT2023/060333 patent/WO2024064982A1/de not_active Ceased
- 2023-09-26 DE DE112023002937.7T patent/DE112023002937A5/de active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4208014A1 (de) * | 1992-03-13 | 1993-02-18 | Daimler Benz Ag | Strassensimulationspruefstand fuer fahrzeugachsen |
| GB2385032A (en) * | 1999-09-03 | 2003-08-13 | Mts System Corp | Loading assembly for a vehicle spindle test fixture |
| DE102012101613A1 (de) * | 2011-12-22 | 2013-06-27 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Prüfstand für Kraftfahrzeuge |
| WO2018046609A1 (de) | 2016-09-12 | 2018-03-15 | Avl List Gmbh | Modularer prüfstand für fahrbereite gesamtfahrzeuge |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN119738186A (zh) * | 2024-11-29 | 2025-04-01 | 中国汽车工程研究院股份有限公司 | 一种通用化的转向机异响性能测试台架 |
Also Published As
| Publication number | Publication date |
|---|---|
| AT526343B1 (de) | 2024-02-15 |
| AT526343A4 (de) | 2024-02-15 |
| DE112023002937A5 (de) | 2025-06-18 |
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