Abstract: The invention relates to a hydrodynamic machine, in particular a hydrodynamic coupling, having a bladed primary wheel and a stationary or revolving bladed secondary wheel, forming a working chamber in order to transmit torque hydrodynamically. The primary wheel and/or the secondary wheel is rotatably mounted by means of at least one plain bearing, which is lubricated by a lubricant source connected by way of at least one lubricant supply line, and a lubricant outlet which is connected by way of a lubricant discharge line, such that in the lubricant supply line and/or the lubricant discharge line a lubricant reservoir, connected to the at least one plain bearing by means of at least one lubricant feed conduit and at least one lubricant return conduit and therefor forming a lubricant circuit, is provided in the event of a failure of the lubricant supply from the lubricant source.

Abstract: The invention relates to a hydrodynamic machine, in particular a hydrodynamic coupling, having a bladed primary wheel and a stationary or revolving bladed secondary wheel, forming a working chamber in order to transmit torque hydrodynamically. The primary wheel and/or the secondary wheel is rotatably mounted by means of at least one plain bearing, which is lubricated by a lubricant source connected by way of at least one lubricant supply line, and a lubricant outlet which is connected by way of a lubricant discharge line, such that in the lubricant supply line and/or the lubricant discharge line a lubricant reservoir, connected to the at least one plain bearing by means of at least one lubricant feed conduit and at least one lubricant return conduit and therefor forming a lubricant circuit, is provided in the event of a failure of the lubricant supply from the lubricant source.

Abstract: A hydrodynamic clutch includes at least two blade wheels that form at least one torus-shaped working chamber that can be filled with an operating medium. In a method of operating the hydrodynamic clutch, the filling degree is determined via a value that at least indirectly characterizes the filling degree. When a maximum filling degree is attained, the operating medium supply is interrupted. During the filling operation, the operating medium is led in a substantially proportional manner to the filling degree from the work chamber into an accumulation chamber coupled to the working chamber. At least one dynamic pressure generator or sensor is inserted into the accumulation chamber and is arranged relative to the accumulation chamber such that, in a first filling state in which the filling degree is lower than the maximum filling degree, no pressure or only a very small first pressure which is constant over the whole first filling state is generated in the dynamic pressure generating unit.