Abstract: The invention relates to a test bed and a method for testing a real test object in driving operation, wherein the test object has at least one real component of a vehicle which is capable of applying torque to a wheel hub. The test bed comprises a load machine configured to be connected to the wheel hub so as to transmit torque, an actuator configured to generate a relative movement between the wheel hub on the one hand and a vehicle frame supporting the wheel hub on the other, simulation means for simulating the driving operation, wherein the simulation means is configured to simulate a virtual wheel and dynamics of the virtual wheel as if it were arranged on the wheel hub, and control means configured to operate the real test object in consideration of the simulated dynamics of the virtual wheel on the test bed.

Abstract: A method for optimizing vehicles and engines that are used for driving such vehicles includes the steps of taking measurements during real operation of the vehicle on the road or on a roller-type test stand, or the engine on an engine test stand; parameterizing a simulation model representing the vehicle or the engine so as to be able to arithmetically determine a prediction about the measured values obtained by means of the measurements; simulating the vehicle by using the simulation model, additionally calculating at least one drivability index (DR) which results from several measured values based on an empirically determined function and which indicates the drivability of a vehicle in a specific driving mode; and optimizing the settings of the vehicle during the simulation, at least one drivability index (DR) being input into the target function or the fringe conditions of the optimization process.

Abstract: A method for optimizing vehicles and engines that are used for driving such vehicles includes the steps of taking measurements during real operation of the vehicle on the road or on a roller-type test stand, or the engine on an engine test stand; parameterizing a simulation model representing the vehicle or the engine so as to be able to arithmetically determine a prediction about the measured values obtained by means of the measurements; simulating the vehicle by using the simulation model, additionally calculating at least one drivability index (DR) which results from several measured values based on an empirically determined function and which indicates the drivability of a vehicle in a specific driving mode; and optimizing the settings of the vehicle during the simulation, at least one drivability index (DR) being input into the target function or the fringe conditions of the optimization process.

Abstract: The invention relates to methods for optimizing vehicles and engines that are used for driving such vehicles, comprising the following steps: measurements are taken during real operation of the vehicle (10) on the road or on a roller-type test stand or the engine (21) on an engine test stand (19); a simulation model representing the vehicle (10) or the engine (19) is parameterized so as to be able to arithmetically determine a prediction about the measured values obtained by means of said measurements; the vehicle (10) is simulated by using the simulation model (11), at least one drivability index (DR) being additionally calculated which results from several measured values based on an empirically determined function and indicates the drivability of a vehicle (10) in a specific driving mode; the settings of the vehicle (10) are optimized during said simulation, at least one drivability index (DR) being input into the target function or the fringe conditions of the optimization process.

Abstract: The invention relates to methods for optimizing vehicles and engines that are used for driving such vehicles, comprising the following steps: measurements are taken during real operation of the vehicle (10) on the road or on a roller-type test stand or the engine (21) on an engine test stand (19); a simulation model representing the vehicle (10) or the engine (19) is parameterized so as to be able to arithmetically determine a prediction about the measured values obtained by means of said measurements; the vehicle (10) is simulated by using the simulation model (11), at least one drivability index (DR) being additionally calculated which results from several measured values based on an empirically determined function and indicates the drivability of a vehicle (10) in a specific driving mode; the settings of the vehicle (10) are optimized during said simulation, at least one drivability index (DR) being input into the target function or the fringe conditions of the optimization process.

Abstract: The present invention relates to a method for analyzing the driving behavior of motor vehicles on a roller type test stand, with the following steps: performance of a predetermined operating cycle in a motor vehicle which is disposed on a roller type test stand; determination of a first longitudinal acceleration signal from a speed signal which is tapped from the power train of the motor vehicle or the roller type test stand; determination of a second longitudinal acceleration signal by an acceleration sensor attached to the motor vehicle; superposition of the first and second longitudinal acceleration signal into a composite signal; determination of a parameter representative of the driveability of the motor vehicle from the composite signal.

Abstract: This invention relates to a procedure for analyzing and influencing the driveability of motor vehicles, including the following steps: Conducting tests on a real vehicle to obtain measurement variables describing its driveability; Continuous monitoring to check whether at least one of a number of predefined trigger conditions is fulfilled, i.e., whether a certain set of variables takes on certain values; If the trigger condition is fulfilled, computation of a profile of several ratings representing vehicle driveability from one or more measured values, using predefined functional relationships.

Abstract: A method for analyzing the driving behavior of motor vehicle wherein a car's driveability is measured easily on a test stand by conducting tests with an actual vehicle to obtain measurement variables describing driving behavior; then defining at least one rating (Dr) indicating the car's driveability as a function of one or more measurement variables; then preparing a simulation model to represent dependencies between the individual measurement variables and, in particular, to compute the rating (Dr) from a set of predefined measurement variables which can be obtained both from the actual vehicle and on a test stand; and then calibrating a dynamic test stand with the use of the simulation model.

Abstract: An apparatus and process for electronically measuring rotational characteristics of a rotating part that rotates with a crankshaft of an internal combustion engine. The rotating part has reference marks and measuring scale marks thereon. The apparatus includes a first pick up for detecting the passage of reference marks and a second pick up for detecting the passage of measuring scale marks. A counter connected to the second pick up counts the detected measuring scale marks. A timer controls the stage of the counter. A load sensor detects the load on the engine. A computer is connected to the first pick up, the counter, the timer, and the load sensor. The computer calculates the instantaneous rotational speed of the rotating part by differentiating the counts obtained during instantaneous counter stages. The computer includes decision logic with a predetermined threshold value.