To improve the identification of system parameters of a test setup of a test bench there is provision for the test setup to be dynamically excited on the test bench by virtue of a dynamic input signal being applied to the test setup. Measured values of the input signal of the test setup and of a resultant output signal of the test setup are recorded. A frequency response of the dynamic response of the test setup between the output signal and the input signal is determined using a nonparametric identification method. A model structure of a parametric model that maps the input signal onto the output signal is derived from the frequency response. The model structure and a parametric identification method are used to determine at least one system parameter of the test setup, and the at least one identified system parameter is used to perform the test run.

To improve the identification of system parameters of a test setup of a test bench there is provision for the test setup to be dynamically excited on the test bench by virtue of a dynamic input signal being applied to the test setup. Measured values of the input signal of the test setup and of a resultant output signal of the test setup are recorded. A frequency response of the dynamic response of the test setup between the output signal and the input signal is determined using a nonparametric identification method. A model structure of a parametric model that maps the input signal onto the output signal is derived from the frequency response. The model structure and a parametric identification method are used to determine at least one system parameter of the test setup, and the at least one identified system parameter is used to perform the test run.

A test system for examining a hollow body, in particular a cylinder bore in an engine block, comprises a measuring apparatus comprising an elongate body and a plurality of sensors which are connected to the body and are set up to carry out a distance measurement. The test system also comprises electronic control means which are set up to move the measuring apparatus into a hollow body to be examined and to determine an internal diameter of the hollow body on the basis of distance measurement data from the sensors. In order to examine hollow bodies of different diameters, at least some of the sensors are in the form of movable sensors which can be moved relative to the elongate body of the measuring apparatus. The electronic control means are also set up to select a measuring position of the movable sensors relative to the elongate body on the basis of a hollow body to be examined. A calibration station is provided and the electronic control means are set up to carry out a calibration process for the movable sensors. A corresponding method is also disclosed.

To provide a dynamometer control device whereby excitation control can be performed so that a resonance phenomenon does not occur even when the moment of inertia of an engine is unknown. A dynamometer control device 6 is provided with an excitation signal generating unit 61 for generating a randomly or periodically fluctuating excitation signal, a speed controller 62 for generating an input signal to a dynamometer whereby a dynamo rotation speed matches a predetermined dynamo command rotation speed, a shaft torque compensator 64 for generating an input signal to the dynamometer whereby vibration of a shaft for connecting an engine and the dynamometer is suppressed using the detection value of a shaft torque sensor, and an adder 65 for generating a torque electric current command signal by adding the input signals generated by the speed controller 62 and the shaft torque compensator 64 to the excitation signal.

The invention relates to a computer-aided method for generating a drive cycle for a vehicle which is suitable for simulating a driving operation, in particular a real driving operation. The computer-aided method comprises establishing a state vector of the drive cycle for a current time interval from a past speed curve, providing an acceleration prediction model, determining an acceleration value in consideration of probabilities resulting from the acceleration prediction model and the state vector, integrating the determined acceleration value over the current time interval in order to obtain a predicted speed value for a next future time interval, and appending the predicted speed value to the past speed curve in order to generate the drive cycle. Furthermore, the invention relates to a device for generating a drive cycle for a vehicle which is suitable for simulating a driving operation, in particular a real driving operation, and means for establishing a state vector of the drive cycle for a current time interval from a past speed curve, means for determining an acceleration value in consideration of probabilities resulting from the acceleration prediction model and the state vector, means for integrating the determined acceleration value over the current time interval in order to obtain a predicted speed value for a next future time interval, and means for appending the predicted speed value to the past speed curve in order to generate the drive cycle.

A fuel injector testing machine is provided. The machine includes a head unit having a flow meter, and a fuel injector holding assembly. The head unit and/or the fuel injector holding assembly can be moved relative to each other, allowing the head unit to test a subset of fuel injectors held on the fuel injector holding assembly, and subsequently can test another subset of the fuel injectors via movement of the head unit and/or fuel injector holding assembly.

A control test system of the hydrogen internal combustion engine vehicle microcomputer includes a hydrogen treatment unit; the hydrogen treatment unit includes a detection box; an absorption box, an impurity removal box, a purification box and a water storage tank are arranged on an outer wall of the detection box; a first spring is fixedly mounted on an upper wall of an inner cavity of the absorption box; a lower end of the first spring is fixedly connected with a piston plate which is in sliding connection with an inner wall of the absorption box; amounting cylinder is arranged on an upper wall of an inner cavity of the purification box; and a plurality of adsorption rods are arranged on an outer wall of the mounting cylinder in an annular array mode.

A control test system of the hydrogen internal combustion engine vehicle microcomputer includes a hydrogen treatment unit; the hydrogen treatment unit includes a detection box; an absorption box, an impurity removal box, a purification box and a water storage tank are arranged on an outer wall of the detection box; a first spring is fixedly mounted on an upper wall of an inner cavity of the absorption box; a lower end of the first spring is fixedly connected with a piston plate which is in sliding connection with an inner wall of the absorption box; amounting cylinder is arranged on an upper wall of an inner cavity of the purification box; and a plurality of adsorption rods are arranged on an outer wall of the mounting cylinder in an annular array mode.

The disclosure provides for a wellbore servicing system that comprises an engine operable to provide power to one or more pumps. The one or more pumps are operable to direct a fluid into a wellbore, wherein the engine is coupled to the one or more pumps via a transmission. The system further comprises an engine control module (ECM) coupled to the engine. The system further comprises a controller coupled to the one or more pumps and operable to determine the volumetric efficiency of each of the one or more pumps. The system further comprises an information handling system, wherein the ECM and the controller are communicatively coupled to the information handling system, wherein the information handling system is operable to determine a divergence when a load is placed on the engine and a pumping plan for the system.

The disclosure provides for a wellbore servicing system that comprises an engine operable to provide power to one or more pumps. The one or more pumps are operable to direct a fluid into a wellbore, wherein the engine is coupled to the one or more pumps via a transmission. The system further comprises an engine control module (ECM) coupled to the engine. The system further comprises a controller coupled to the one or more pumps and operable to determine the volumetric efficiency of each of the one or more pumps. The system further comprises an information handling system, wherein the ECM and the controller are communicatively coupled to the information handling system, wherein the information handling system is operable to determine a divergence when a load is placed on the engine and a pumping plan for the system.