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
  • G01M15/00—Testing of engines
  • G01M15/02—Details or accessories of testing apparatus
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
  • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
  • F16D3/48—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part having pins arranged parallel to the axis and entering holes in the other coupling part

Definitions

• the invention relates to a test stand arrangement for an internal combustion engine, with an electric motor which can be towed or loaded with a load torque and an adapter element which can be driven by the electrical machine and which has fastening means by way of which the adapter element can be coupled to the internal combustion engine.
• adapter elements designed as manual set-up adapter are generally used. These set-up adapters are screwed onto the crankshaft flange of the internal combustion engine.
• the counterpart to this crankshaft side setup adapter is usually firmly mounted on the output shaft of the electrical machine of the test bench, so that a drive connection between the test bench and the internal combustion engine can be made by a regular horizontal feed movement of the test.
• several such setup adapters are necessarily provided, so that internal combustion engines can be fed to the automated test procedure on the test bench continuously.
• test devices are described for example in the publications DE 10 2013 103 768 AI and DE 10 2013 104 173 AI.
• DE 102 38 361 AI call which shows a drive for an engine to be tested, in which it is provided to automatically screw a coupling device of the drive to the crankshaft flange of the internal combustion engine.
• EP 1 693 661 B1 also shows a test device for an internal combustion engine which has a clutch mechanism which couples an electric motor directly to the crankshaft of the internal combustion engine.
• the object of the present invention is to provide a test rig arrangement which permits at least further or complete automation of the test process.
• test stand arrangement for an internal combustion engine comprising an electrical machine serving for load simulation, an adapter element which can be driven by the electric machine and has fastening means by way of which the adapter element can be coupled to the internal combustion engine, wherein the adapter element furthermore comprises one of the electrical machine has drivable transmission arrangement, by means of which the fastening means for the coupling of the adapter element with the internal combustion engine can be beat beauf-.
• the test stand arrangement according to the invention makes it possible to at least significantly reduce, if not eliminate altogether, the previously stored workstations for mounting and dismounting the set-up adapter. Therefore, no set-up adapters need to be provided in order to pre-assemble the combustion engines entering as the next in the test procedure.
• a fastening means is understood to be anything that can be used to produce a detachable connection between the adapter element and the internal combustion engine.
• coupling or coupling is to be understood as meaning a state or a property in which a power flow can be transmitted via the connection point which has arisen through the coupling.
• the adapter element and the electric machine can be brought to each other in a drive position and in a coupling position, wherein in the drive position, a load between the internal combustion engine and electric machine is transferable and in the coupling position, the fastening means for coupling the adapter element with the internal combustion engine by the electric Machine are acted upon.
• the advantage here is that both the actual strigprozedere can be performed with the electric machine, namely by a load between the internal combustion engine and electric machine can be transferred, as well as an assembly and disassembly of the adapter element to and from the internal combustion engine.
• the gear arrangement preferably has a drive gear arranged coaxially with respect to the electric machine, which drive gear can be driven in the coupling position by the electric machine. It follows that a feed movement, with which the electric machine and the adapter element are brought into the Ankoppelposition, only a translational movement must be. In this case, it is particularly preferred that the feed movement into the coupling position is carried out only by the electric machine and that the adapter element remains stationary.
• the gear assembly is executed in countershaft design, wherein on the drive gear, a power flow is transferable to at least one countershaft.
• a power flow is transferable to at least one countershaft. This can be a total of an axially short design of the adapter element.
• the electric machine has an output element that is in the drive position with a drive cage of the adapter element in a positive engagement and is in the Ankoppelposition with the gear assembly in a form-locking engagement.
• the output element has a plurality of spring-loaded drivers, which engage in the coupling position in the drive gear of the transmission assembly.
• the electric machine has a spring-loaded punch, by means of which the adapter element can be acted upon in the coupling position in the direction of the internal combustion engine.
• the spring-loaded punch ensures that the fastening means, in particular at the beginning of the coupling position, can engage in the corresponding counterpart on the side of the internal combustion engine.
• the counterpart can regularly be a flange of the crankshaft of the internal combustion engine.
• the coupling position is formed by a displacement region of the adapter element relative to the electric motor, wherein in a first displacement position, the fastening means are positioned in contact with the internal combustion engine and in a second displacement position, the fastening means are coupled to the internal combustion engine.
• a sensor device is provided, via which the coupling position, the displacement positions of the coupling position and the drive position can be detected. In this way it can be ensured that the assembly and disassembly of the test bench can be done fully automated to and from the internal combustion engine.
• the fastening means have a plurality of threaded bolts. This may advantageously be available standard parts.
• the gear arrangement preferably comprises at least one slip clutch in order to limit a drive torque of the electric machine to the gear arrangement.
• the object is further achieved by a method for positioning a test rig arrangement on an internal combustion engine, with the steps:
• the fastening means Operating the electric machine to act on the gear assembly, the fastening means to achieve a second displacement position of the Ankoppelpo- position, in which the fastening means are coupled to the internal combustion engine.
• the coupling position, the displacement positions of the coupling position and the drive position are detected by a sensor device.
• a coaxially arranged to the electric machine drive gear of the gear assembly is driven in the coupling position of the electric machine.
• the gear assembly is executed in countershaft design and on the drive gear, a power flow is transmitted to at least one countershaft.
• the electric machine has a spring-loaded punch and the spring-loaded punch acts on the adapter element in the coupling position in the direction of the internal combustion engine.
• test stand arrangement according to the invention will be described below with reference to the figures. Show here
• FIG. 1 shows a test stand arrangement according to the invention in a basic position
• FIG. 2 shows a test stand arrangement according to the invention in a first displacement position of a coupling position
• FIG. 3 shows a test stand arrangement according to the invention in a second displacement position of a coupling position
• FIG. 4 shows a test stand arrangement according to the invention in a drive position
• FIGS. 5a, 5b show a detail of a test rig arrangement according to the invention.
• FIG. 1 shows a test stand arrangement 10 according to the invention.
• the test stand arrangement 10 can consist of the main components of the internal combustion engine 12, electrical machine 20 and Adapter member 30 which are arranged axially aligned along a longitudinal axis L.
• the longitudinal axis L is preferably simultaneously an axis of rotation about which a crankshaft 14 of the internal combustion engine 12, the electric machine 20 and the adapter element 30 can rotate.
• the adapter element 30 acts as a connecting element between the crankshaft 14 of the internal combustion engine 12 and the electric machine 20.
• the test bench arrangement 10 is shown in a basic position of the main components of the internal combustion engine 12, electrical machine 20 and adapter element 30.
• the internal combustion engine 12 is shown here largely schematically. Only the crankshaft 14 of the internal combustion engine 12 and the output flange 16 of the crankshaft 14 is shown explicitly.
• the electrical machine 20 is shown largely schematically.
• the electric machine 20 comprises an output element 22 which can be driven by it about the longitudinal axis L, a punch 26 which is spring-loaded parallel to the longitudinal axis L and a position indicator 28 mounted on the housing side.
• the output element 22 may be formed as a gear with external teeth 23.
• the output element 22 comprises a plurality of parallel to the longitudinal axis L aligned spring-loaded driver 24, the counter to a Federbeauf- tion at least partially parallel to the longitudinal axis L in the driven element 22 are retractable.
• the adapter element 30 comprises a drive basket 34, in which a gear arrangement 50 is accommodated.
• the drive basket 34 in turn comprises fastening means 32 and a centering pin 36.
• the fastening means 32 and the centering pin 36 are arranged facing the drive basket 34 of the internal combustion engine 12.
• the fastening means 32 may comprise a plurality of threaded bolts 38. While the centering mandrel 36 is disposed coaxially with the longitudinal axis L on a flange 42 of the drive basket 34, the threaded bolts 38 are circumferentially arranged to pass around the centering mandrel 36 from within the drive basket 34 through the flange 42 to the outside.
• screw heads 40 of the threaded bolts 38 are arranged in the interior of the drive cage 34 of the adapter element 30 and can be correspondingly actuated or rotationally acted upon there.
• four threaded bolts 38 are provided, whereby a different number or an odd number may be appropriate.
• the drive basket 34 of the adapter element 30 further comprises an internal toothing 44, which is arranged facing the electric machine 20.
• the internal toothing 44 can be inserted into a toothing engagement with the external teeth 23 of the output member 22 of the electric machine 20 are brought to make a drive connection between the electric machine 20 and the adapter element 30.
• the drive basket 34 has on an outer circumference a position indicator 46, which is arranged in the region of the internal toothing 44.
• the gear arrangement 50 includes a coaxial with the longitudinal axis L arranged drive gear 52.
• the drive gear 52 is rotatably supported by a bearing 56 on the drive basket 34.
• the drive gear 52 is radially outward with a number of the threaded bolts 38 corresponding number of gears 58, which are rotatably supported respectively on countershafts 60, in a meshing engagement.
• the countershafts 60 are held in a suitable but not shown manner relative to the drive basket 34.
• gears 62 are connected to the respective gear 58 in a rotationally fixed connection.
• the gears 62 may rotationally drive actuating gears 66 disposed radially inwardly.
• the toothed wheels 62 comprise slip clutches 74.
• Each actuating toothed wheel 66 is arranged coaxially with one of the threaded bolts 38 or one of the screw heads 40.
• the actuating gears 66 form on the threaded bolt 38 facing the end of a drive profile 70 for receiving and for rotational drive of the screw head 40 of the threaded bolt 38.
• the drive profile 70 may be, if necessary, a hexagonal profile, a Torx, a multi-tooth profile or the like. Via the slip clutches 74, a transmitted from the gears 62 to the actuating gears 66 torque can be limited to a preset value.
• test assembly 10 includes a sensor device 80, 82 ⁇ , 82 2, 82 3 includes at least three sensor elements.
• sensor device 80 various positions of electric machine 20 and adapter element 30, which will be described in greater detail, can be detected.
• FIG. 2 shows the test rig arrangement 10 in a coupling position, in which the output element 22 of the electric machine 20 is in driving connection with the gear arrangement 50 of the adapter element 30 via the spring-loaded drivers 24.
• the driver 24 engage in axially aligned holes 72 of the drive gear 52 of the Geretean- order 50, so that a rotating drive of the gear assembly 50 can be made by the electric machine 20.
• the holes 72 are designed as blind holes.
• the coupling position can extend over a displacement region of the adapter element 30 relative to the electrical machine 20.
• FIG. 2 shows a first displacement position in which the threaded bolts 38 of the fastening means 32 have been brought into contact with the output flange 16 of the crankshaft 14 and at the same time the electrical machine 20 has been driven into the drive cage 34 of the adapter element 30 to an extent such that spring-loaded driver 24 are both completely sunk into the holes 72 of the drive gear 52, and are retracted against the spring action in the output member 22 of the electric machine 20.
• the plunger 26 acts on the adapter element 30 in the direction of the internal combustion engine 12.
• This first displacement position of the coupling position can be detected via the sensor elements 82 2 and 82 3 by a position signal in the sensor element 82 2 is induced by the position ring 28 and in the sensor element 82 3 no position signal is induced by the position ring 46.
• FIG. 3 likewise shows the test stand arrangement 10 in a coupling position, but in a second displacement position, in which flange 42 of the drive cage 34 has been fixedly coupled to the output flange 16 of the crankshaft 14 via the threaded bolts 38 of the fastening means.
• the coupling consists in a screwing over the threaded bolt 38.
• This second displacement position of the docking position can be detected by the sensor elements 82 2 and 82 3, specifically by the sensor element 82 in a position signal by the 2 Positioning ring 28 is induced and in the sensor element 82 3, a position signal is induced by the position ring 46.
• FIG. 4 shows the test rig arrangement 10 in a drive position in which the adapter element 30 has maintained its position compared with the coupling position illustrated in FIG. However, a change in position away from the internal combustion engine 12 had been experienced by the electric machine 20.
• the internal toothing 44 of the drive cage 34 is in meshing engagement with the external toothing 23 of the output element 22 of the electric machine 20, so that a drive connection exists between the internal combustion engine 12 and the electrical machines 20.
• a drag or Lastmomentaufbringung the internal combustion engine 12 by means of the electric machine 20 can take place.
• the drive position can be detected via the sensor elements 82 i and 82 3 by inducing a position signal through the position ring 28 in the sensor element 82 i and inducing a position signal through the position ring 46 in the sensor element 82 3 .
• FIG. 5 a shows a detail of the drive element 30 and a part of the drive cage 34, the threaded bolts 38 of the attachment means 32, the countershafts 60 with the gears 58 and the gears 62 and the actuation gears 66 with the drive profiles 70.
• FIG. 5 b shows an axial view of the in the figure 5a shown details.
• the reference numeral 74 which designates the slip clutches formed by the pairings of the friction wheels 62 and the actuating gears 66, is also shown in FIG. 5b.
• the slip clutches 74 are preferably designed such that they allow transmission of a tightening torque to the threaded bolt 38 or its screw heads 40 up to a desired torque and cause a torque limitation when the set torque is exceeded due to slip.
• a target torque for example, 35 Nm can be set.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Testing Of Engines (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=56551386

Family Applications (1)

Country Status (4)

Family Cites Families (6)

• 2015
  • 2015-08-07 DE DE102015215156.5A patent/DE102015215156B3/de not_active Expired - Fee Related
• 2016
  • 2016-07-22 WO PCT/EP2016/067552 patent/WO2017025297A1/de active Application Filing
  • 2016-07-22 EP EP16744705.1A patent/EP3332236A1/de not_active Withdrawn
  • 2016-08-08 CN CN201620851432.8U patent/CN206146644U/zh not_active Expired - Fee Related

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