Abstract: A dynamometer test unit configured for use in a vehicle dynamometer system for dynamometer testing of a vehicle, the dynamometer test unit being configured to be connected to a wheel shaft of a vehicle, the dynamometer test unit comprising a power source having a stator and a rotor and being configured to, during testing, apply torque to a wheel shaft of the vehicle being tested, the power source being carried by a stator support, the stator being journaled in relation to the stator support, the dynamometer test unit further comprising means for measuring torque comprising an elastic strip, wherein the elastic strip connects the stator to the stator support, thereby restraining relative rotational movement between stator and stator support, and configured to transfer force between the stator and stator support, the elastic strip being firmly secured in a manner such that it is subjected to homogenous tensile prestress in a longitudinal direction of the elastic strip.

Abstract: A method for use in dynamometer testing of a vehicle having a steering mechanism for changing steering angle of at a wheel hub connected to a first wheel shaft is provided. The method includes to apply a torque to the first wheel shaft using a first controllable dynamometer power source of a vehicle dynamometer test unit being rigidly connected to the wheel hub. A change of steering angle of the wheel hub rotates the rigidly connected first dynamometer test unit. An external force acting on the dynamometer test unit is applied to influence the force required by the vehicle steering mechanism to change steering angle of the wheel hub when changing steering angle of the wheel hub.

Abstract: A dynamometer test unit configured for use in a vehicle dynamometer system for dynamometer testing of a vehicle, the dynamometer test unit being configured to be connected to a wheel shaft of a vehicle, the dynamometer test unit comprising a power source having a stator and a rotor and being configured to, during testing, apply torque to a wheel shaft of the vehicle being tested, the power source being carried by a stator support, the stator being journaled in relation to the stator support, the dynamometer test unit further comprising means for measuring torque comprising an elastic strip, wherein the elastic strip connects the stator to the stator support, thereby restraining relative rotational movement between stator and stator support, and configured to transfer force between the stator and stator support, the elastic strip being firmly secured in a manner such that it is subjected to homogenous tensile prestress in a longitudinal direction of the elastic strip.

Abstract: A vehicle dynamometer system for dynamometer testing of a vehicle, comprises at least one dynamometer test unit having a power source, the power source comprising an output shaft arranged for, in use, rotation with a vehicle wheel shaft, the system further comprising an adapter plate, said adapter plate comprising fasteners for allowing fixed connection to a wheel hub of a wheel shaft being tested, said adapter plate further comprising fasteners for allowing fixed connection of the adapter plate to the output shaft of said dynamometer test unit to thereby connect the output shaft of the dynamometer test unit to said wheel shaft. The adapter plate is designed such that, when fixedly connected to said wheel hub but disconnected from said dynamometer test unit, said adapter plate is arranged to support the vehicle to allow relocation of said vehicle while supported by said adapter plate.

Abstract: A method for use in dynamometer testing of a vehicle having a steering mechanism for changing steering angle of at a wheel hub connected to a first wheel shaft, the method includes: —in use, applying a torque to said first wheel shaft using a first controllable dynamometer power source of a vehicle dynamometer test unit rigidly connected to said wheel hub, —wherein a change of steering angle of said wheel hub rotates said rigidly connected first dynamometer test unit, characterized in the method including, when changing steering angle of said wheel hub: —applying an external force acting on the dynamometer test unit to influence force required by the vehicle steering mechanism to change steering angle of said wheel hub.

Abstract: A vehicle dynamometer system for dynamometer testing of a vehicle, comprises at least one dynamometer test unit having a power source, the power source comprising an output shaft arranged for, in use, rotation with a vehicle wheel shaft, the system further comprising an adapter plate, said adapter plate comprising means for allowing fixed connection to a wheel hub of a wheel shaft being tested, said adapter plate further comprising means for allowing fixed connection of the adapter plate to the output shaft of said dynamometer test unit to thereby connect the output shaft of the dynamometer test unit to said wheel shaft. The adapter plate is designed such that, when fixedly connected to said wheel hub but disconnected from said dynamometer test unit, said adapter plate is arranged to support the vehicle to allow relocation of said vehicle while supported by said adapter plate.

Abstract: The present invention relates to a method for use in dynamometer testing of a vehicle powertrain component or a vehicle (100), a dynamometer power source (201) of a vehicle dynamometer system being connected to an output shaft of a vehicle powertrain component or a vehicle wheel shaft, said dynamometer system being arranged to measure a reaction load and said method including, when testing: determining a first measure of a first reaction load of said first dynamometer power source, determining an influence of moment of inertia on said first measure of said first reaction load, and compensating said first measure of said first reaction load by said determined influence of moment of inertia.

Abstract: The present invention relates to a method for use in dynamometer testing of a vehicle (100), the vehicle (100) including at least a first wheel shaft and at least one first vehicle power source for providing power to said first wheel shaft, said first wheel shaft being connected to a vehicle dynamometer system, said vehicle dynamometer system comprising a first controllable dynamometer power source (201) for providing power to said first wheel shaft, said first dynamometer power source being an electrical machine (201) comprising a stator and a rotor, said stator comprising a stator winding. The method includes: determining whether a first temperature (T1) is below a first temperature limit (Tlim1), and heating said electrical machine (201) by applying a current (Iheat) to said stator winding when said first temperature (T1) is below said first temperature limit (Tlim1).

Abstract: The present invention relates to a method for use in dynamometer testing of a vehicle powertrain component or a vehicle (100), a dynamometer power source (201) of a vehicle dynamometer system being connected to an output shaft of a vehicle powertrain component or a vehicle wheel shaft, said dynamometer system being arranged to measure a reaction load and said method including, when testing: determining a first measure of a first reaction load of said first dynamometer power source, determining an influence of moment of inertia on said first measure of said first reaction load, and compensating said first measure of said first reaction load by said determined influence of moment of inertia.

Abstract: The present invention relates to a method for use in dynamometer testing of a vehicle (100), the vehicle (100) including at least a first wheel shaft and at least one first vehicle power source for providing power to said first wheel shaft, said first wheel shaft being connected to a vehicle dynamometer system, said vehicle dynamometer system comprising a first controllable dynamometer power source (201) for providing power to said first wheel shaft, said first dynamometer power source being an electrical machine (201) comprising a stator and a rotor, said stator comprising a stator winding. The method includes: determining whether a first temperature (T1) is below a first temperature limit (Tlim1), and heating said electrical machine (201) by applying a current (Iheat) to said stator winding when said first temperature (T1) is below said first temperature limit (Tlim1).

Abstract: A method and a device for performing tests on an internal combustion engine or a structure which is associated with the engine by measuring output parameter values on at least one output shaft (3LF, 3RF) which is connected to the engine, is distinguished by producing a representation of variations in said output parameter values during operation of the engine, and evaluating the representation for determining an operating parameter value for the engine or the structure. The invention also concerns a dynamometer testing rig.

Abstract: A method and a device for performing tests on an internal combustion engine or a structure which is associated with the engine by measuring output parameter values on at least one output shaft (3LF, 3RF) which is connected to the engine, is distinguished by producing a representation of variations in said output parameter values during operation of the engine, and evaluating the representation for determining an operating parameter value for the engine or the structure. The invention also concerns a dynamometer testing rig.