The water pre-heating connection (6) has at least one heating rod projecting into the through-flow water channel. The rod contains heating and regulating elements. The heating rod (1) has no external thread, and is intended to be pressed into an unthreaded...

The heating device has several heating elements, the loads of two of which are equal. One of these is controlled by an adjustable semiconductor element. This element has a switch enabling it to be switched to one of the other heating elements. The control ...

A warm-up control device for an internal-combustion engine comprises a heat storage device (1) for storing a heating medium heated during operation of the engine, supplies the heating medium stored in the heat storage device (1) to a drive device (22) (a t...