Abstract: A cooling structure (1) for a cylinder head (2) of an internal combustion engine includes a lower first cooling jacket (12) adjacent to a fire deck (13) and an upper second cooling jacket (14) adjacent to an intermediate deck (15), the first and second cooling jackets (12, 14) being flow connected by at least one transfer opening (27, 31) of the intermediate deck (15), the first cooling jacket (3) including at least one center cooling chamber (17) and an outer cooling chamber arrangement with at least one first outer cooling chamber (16), the outer cooling chamber (16) and the center cooling chamber (17) being flow connected by at least one exhaust side first radial passage (19) extending in a region of the exhaust valve bridge (8) and by at least one second radial passage (20, 21), the first radial passage (19) and the second radial passage (20, 21) being streamed hydraulically in parallel.

Abstract: A fuel consumption-measuring system includes a feed line, a first pump which pumps fuel from a tank via the feed line to a consumer, a fuel consumption-measuring device in the feed line, a first return line which branches off at the consumer and opens into the feed line between the fuel consumption-measuring device and the consumer, a second return line which branches off from the feed line between the first pump and the fuel consumption-measuring device which opens into the tank, a branch which leads from the feed line into the second return line, a heat exchanger, and a flow device arranged in the first and second return lines. The flow device provides an equal volume flow at an opening of the first return line into the feed line and at the branch leading from the feed line into the second return line.

Abstract: A system for measuring temporally resolved through-flow processes of a fluid. The system includes an inlet, a main line comprising a line section, an outlet fluidically connected with the inlet via the main line, a displacement device arranged in the main line, a circuitous line which branches off the main line between the inlet and the displacement device and to enter the main line between the displacement device and the outlet, a pressure difference transducer arranged in the circuitous line, an evaluation and control unit which controls the displacement device, and a bypass line comprising a pump and a sensor. The bypass line branches off from the main line or from the circuitous line and ends at a same side of the displacement device and the pressure difference transducer to bypass the line section or the circuitous line from which the bypass line branches off.

Abstract: A multi-phase synchronous converter consisting of a plurality of half bridges which in turn consist of an upper power switch and a lower power switch, the converter being actuated by a pulse width modulation dependent on a predetermined pulse duty cycle in the range of zero to one hundred percent. The multi-phase synchronous converter generates an output current and is operated in a normal mode in which the power switches switch with a normal switching period defined by a predetermined normal switching frequency, and a normal pulse duration dependent on the actual pulse duty cycle. As soon as the pulse duty cycle exceeds an upper duty cycle threshold or falls below a lower duty cycle threshold, the multi-phase synchronous converter is switched from the normal mode into an operating mode in which at least one of the power switches of at least one half bridge is deactivated.

Abstract: The invention relates to a variable valve control device (1) for internal combustion engines of the reciprocating-piston design having at least one gas exchange valve (32), which can be actuated by a camshaft (3) by means of a cam device (4) that is connected to the camshaft (3) for conjoint rotation and that has at least two different cam tracks (7, 8), which camshaft is supported in such a way that the camshaft can be rotated about a camshaft axis (2), wherein, selectively, one of the cam tracks (7, 8) can be activated and at least one other cam track (8, 7) can be deactivated by means of a control device (10), and wherein the control device (10) has at least one control lever (12), which can be pivoted about a pivot axis (11), and has at least one first control body (13), which is connected to the camshaft (3) for conjoint rotation and in the surface of which at least one first control groove (17) and at least one second control groove (18) are formed, wherein, selectively, a first control stud (19) of the

Abstract: The invention relates to an internal combustion engine comprising a cylinder head (1) with a fire deck (7) on the combustion chamber side, at least one injector sleeve (2) detachably connected to the cylinder head (1) for mounting an injection unit, wherein the injector sleeve (2) is screwed to the fire deck (7) on a fire-deck-side first end (5) via a first screw connection (4), and wherein the injector sleeve (2) comprises in the region of the first end (5) at least one radially protruding first bearing area (9) with a first contact face (10) facing the fire deck (10), which contact face rests on a first counter surface (11) formed by the cylinder head (1).

Abstract: The invention relates to a device (1) for measuring friction on a cylinder-piston arrangement, wherein a reciprocating piston (3) is arranged in a cylinder liner (2) of a liner unit (23), said cylinder liner being decoupled from a cylinder head (9), and the liner unit (23) is arranged in a liner carrier (8) which is connected to a sensor carrier and which has a rotationally symmetrical receiving region (13) for the cylinder liner (2), said receiving region being concentric to the cylinder axis (21), wherein preferably at least one cooling jacket (12) is assigned to the cylinder liner (2).

Abstract: The invention relates to a method for detecting an unsealed location in a heat recovery system (5) of an internal combustion engine (1) of a motor vehicle. The heat recovery system (5) has at least one combustible working medium, a working medium circuit (6) with at least one EGR evaporator (7), a pump (8), and at least one expansion machine (9). The aim of the invention is to allow an early and reliable detection of leakages in the EGR evaporator (7) of a heat recovery system (5) in the simplest manner possible. This is achieved in that the internal combustion engine (1) is operated in the overrun mode, the oxygen concentration in the exhaust gas is ascertained and compared with a defined lower threshold, and if the lower threshold is undershot, a leakage in the EGR evaporator (7) is detected.

Abstract: The invention relates to a method for monitoring at least one exhaust gas turbocharger (ATL) of a large internal combustion engine (BKM), comprising at least one compressor (1a) and one exhaust gas turbine (1b) arranged on the same shaft as the compressor, wherein the current pressures (p1, p2) upstream and downstream of the compressor (1a) and the current temperatures (T1, T4) upstream of the compressor (1a) and upstream of the exhaust gas turbine (1b) are measured.

Abstract: For continuous measurement of the dynamic fuel consumption of an internal combustion engine with a venting tank (10) which is disposed in a return line (11) from the outflow side (12) of the fuel system (7) and is also connected to the intake line (13) to the fuel system, a filling level regulator (15) is provided at a connection of the venting tank (10) and has a circulation pump (22) as well as a control valve (9) connected thereto, through which the flow passes continuously, and which is opened more or less as a function of the filling level to be regulated. Thus apparent consumptions occurring in specific operating states of the internal combustion engine can be avoided but can also be taken into account as corrections.

Abstract: The invention relates to a liquid-cooled internal combustion engine (1), comprising: at least one cylinder block (2), which is connected to at least one cylinder head (3); at least one first cooling jacket (4) in the cylinder block (2) and at least one second cooling jacket (5) in the cylinder head (3), wherein the first and the second cooling jackets (4, 5) are arranged in a coolant circuit and are connected to each other with regard to flow; and at least one control element arranged in the coolant circuit.

Abstract: A device for detecting signal pulses in an analogue measurement signal of a particle counter is disclosed. The device includes an AD converter and an evaluation unit, wherein the evaluation unit includes a slope evaluation unit, which determines signal pulses by evaluating the pulses between adjacent samples in the digital data stream of the AD converter in real time.

Abstract: The invention relates to a method for checking the efficacy of an exhaust gas after-treatment device (9), especially of a catalyst, for an internal combustion engine, exhaust gas generated by a donor internal combustion engine (2) flowing through the exhaust gas after-treatment device (9) to be checked. In order to allow the efficacy of an exhaust gas after-treatment device (9) to be checked with a high degree of flexibility and in a simple manner, a partial quantity is withdrawn from the exhaust gas flow of the donor internal combustion engine (2) and is fed to a defined partial inlet cross-section (22) of the exhaust gas after-treatment device (9) to be checked.

Abstract: The invention relates to a system (1) for analyzing an energy efficiency of a motor vehicle (2), having: a first device (4a, 4b), in particular a sensor, configured to detect a first data set of at least one first parameter, which is suitable to characterize energy consumed by at least one apparatus A, in particular a steering system or drive device (3); a second device (5a, 5b, 5c, 5d), in particular a sensor, configured to detect a second data set of at least one second parameter, which is suitable to characterize an operating state of the at least one apparatus A; a third device (6), configured to detect a third data set of at least one third parameter, which is suitable to characterize at least one driving state of the vehicle (2); a first comparison device (7), in particular part of a data processing device, configured to compare the values of the second data set with predefined parameter ranges which correspond to at least one operating state, and to compare the values of the third data set with predefi

Abstract: An electrical machine includes a stator, a rotor comprising a shaft, and at least one heat-conducting element. The rotor is arranged at least partially inside the stator. The shaft includes at least one opening on at least one front side and an axis of rotation. The at least one opening extends in one direction along the axis of rotation of the shaft. The at least one heat-conducting element is arranged in the at least one opening of the shaft. The at least one heat-conducting element is at least partially made of a material having a thermal conductivity which is higher than a material of the shaft.

Abstract: The invention relates to a method for operating an internal combustion engine during any driving operation and in particular during a defined testing cycle which determines compliance with regulations. The internal combustion engine has at least one exhaust gas aftertreatment device with an adjustable degree of efficiency (for example by changing the reduction agent) or an exhaust gas recirculation device or alternative variables for changing the raw engine emissions. At least one monitoring window is assigned to the active profile. The aim of the invention is to allow strict exhaust gas regulations to be met in particular during real driving operations while simultaneously allowing a low fuel consumption. This is achieved in that at least one main monitoring window of the driving profile and a sub-monitoring window (F2) with a starting point and an end point are defined within a driving profile or test cycle.

Abstract: The invention relates to a method for controlling a waste-heat utilization system (20) for a motor vehicle driven by an internal combustion engine (10) by means of a drive train (13), wherein the waste-heat utilization system (20) has at least one expander (22), at least one evaporator (21), and at least one pump (24) for an operating medium, in particular ethanol. At least the evaporator (21) is arranged in the region of the exhaust gas system (11) of the internal combustion engine (10). The expander (22), which can be operated in several operating modes, performs work in at least one operating mode.

Abstract: A method for detecting a leaking point in a heat recovery system of an internal combustion engine of a motor vehicle, wherein the heat recovery system includes a combustible working medium and a working medium circuit with an evaporator, a pump and an expansion machine. The recirculated exhaust gas of the engine flows through or around the evaporator which is arranged in an exhaust-gas return line. At least one oxidation catalytic converter is arranged in an exhaust gas line of the engine. A first temperature sensor is arranged in the exhaust gas line upstream and a second exhaust gas temperature sensor is arranged downstream of the oxidation catalytic converter. Temperatures of the exhaust gas are measured with these temperature sensors during operation of the engine in the exhaust gas line upstream and downstream of the oxidation catalytic converter.

Abstract: A measuring routine for monitoring the operating state of a fuel cell arrangement consisting of at least one fuel cell, in which the fuel cell arrangement has an operating load connected to it, at least one power amplifier for supplying at least one low-frequency signal (se1(t), se2(t)) is further provided, the output of which is coupled to the fuel cell arrangement, and having an evaluation device, likewise coupled to the fuel cell arrangement, for capturing a signal response sai(t) to the at least one supplied signal sei(t), wherein the fuel cell arrangement (1) has two or more individual signals (se1(t), se2(t)) at different frequencies (fe1, fe2) supplied to it and the evaluation device is set up to capture the signal response sai(t) for selected frequencies (fa3, fa4) of the intermodulation products (mfe1+/?nfe2) of the supplied individual signals (se1(t), se2(t)) and to measure at least the amplitude of said signal response in order to obtain at least one output signal (SAZ, S?AZ, S?AZ).

Abstract: A method for monitoring an actuator device of a reciprocating piston engine, wherein the actuator device is designed to actuate, particularly reversibly displace, a sliding cam device of the reciprocating piston engine, particularly substantially parallel to a camshaft of the reciprocating piston engine, with the steps S1 Feeding of actuation energy to the actuator device, whereupon the actuator device undergoes a first state change, S2 Monitoring of the actuator device and detection of a second state change of the actuator device, S3 Determining of a first angle of rotation ? of a camshaft or of the camshaft of the reciprocating piston engine on the basis of the second state change.