Abstract: With a device for operating a diesel engine, compression, fuel injection and ignition are controlled in such a way that the maximum total pressure in the cylinder, after ignition of the mixture, in principle no longer increases.

Abstract: The invention relates to a process and apparatus for carrying out function tests on internal combustion engines using the idle-acceleration method. In such a test, the engine is subjected to at least one acceleration cycle, in a condition of being disconnected from the load. The various moments of inertia of the engine, including clutch plates and flywheel, cause effective loading on the engine. In this way loading cycles may be simulated by varying the positive or negative acceleration value. The invention now proposes a preparation cycle before the actual test cycle. During the preparation cycle, the acceleration values which depend on the individual engine power output are measured and the actual test cycle is corrected in dependence on the result of the measurement operation, in such a way that the predetermined acceleration values and thus also the loading values are maintained.

Abstract: A reversing/reduction gear connecting a marine gas turbine to a propulsion shaft is of the epicyclic type, and includes two sun wheels, two sets of planetary gear wheels, two planetary gear wheel carriers and two external ring wheels, means being provided for selectively braking a first combination of one planetary gear wheel carrier and one of the external gear wheels, as well as the combination of the other external ring wheel and one of the sun wheels, respectively.

Abstract: A reversing/reduction gear connecting a marine gas turbine to a propulsion shaft is of the epicyclic type, and includes two sun wheels, two sets of planetary gear wheels, two planetary gear wheel carriers and two external ring wheels, means being provided for selectively braking a first combination of one planetary gear wheel carrier and one of the external gear wheels, as well as the combination of the other external ring wheel and one of the sun wheels, respectively.

Abstract: When analyzing exhaust gases from vehicle internal combustion engines according to the simplified method, where the inertia and the internal losses of the engine are used as braking factors and the engine, during a given period of time, is subjected to a series of short incidents of fuel supply increases above idling speed level, it is important to ensure that all play is eliminated in the transmission path between the monitoring unit determining the fuel increase incidents and the fuel supply means. The fuel supply increase incidents should furthermore be selected so with respect to resulting changes in effective mean pressure (PME) and speed (RPM), that the fuel supply means, during each incident, will be displaced in a positive direction only, until the engine returns to the idling speed level.

Abstract: A reversing gear connecting a gas turbine to a propulsion shaft includes a big-diameter first gear wheel rotatable with the propulsion shaft and two pinions meshing therewith. There are further two intermeshing gears, one aligned with each of the pinions. One of the pinions has a through bore, permitting the passage of the output shaft from the turbine, a two-way clutch between this first pinion and its aligned gear, to connect, at will, last mentioned gear to the output shaft, or said shaft to the first pinion, the other pinion and its aligned gear being permanently interconnected.

Abstract: Exhaust gas is sampled from an internal combustion engine operated disconnected from the transmission elements, thus braked by its inertia and internal losses only.Before running the test it is important to find out the positions, at which the fuel supply means ensures idle running and maximum fuel supply, respectively. A monitoring device is designed to find out these positions, and then to run a test cycle between those positions. The monitoring device may include means for running, prior to the actual test, a short conditioning program at the engine, to ensure that the same has attained a desired normal temperature, when the test starts.

Abstract: For determining the emission contents of the exhaust gases of a vehicle internal combustion engine the idling engine is disengaged from the vehicle's driving transmission and is, during a fixed period of time, subjected to a series of load variations by momentarily increased charges of fuel to the engine. A certain fraction of the exhaust gas quantity generated during the mentioned period of time is drained or directed to a gas sampling unit, and this gas fraction is analyzed.