Abstract: In the embodiments described in the specification, a device having gear teeth to provide magnetic asymmetries rotates adjacent to a permanent magnet which is part of a mechanical mounting for a piezoelectric transducer. Relative motion between the gear teeth and the magnet subjects the transducer to a varying mechanical stress so that it generates a pulsed output voltage signal having an amplitude which is independent of surrounding influences.

Abstract: An injection device having at least one injection nozzle arrangement for intermittent discharge of a prescribed quantity of fuel. The nozzle arrangement is actuatable in response to an increased fuel pressure in the nozzle arrangement, and has an inlet communicating with the nozzle arrangement for supplying fuel. An outlet communicates with the nozzle arrangement for partial return of the fuel to provide a flow of fuel through the nozzle arrangement and thus uniflow scavenging and cooling of the injection device. The flow of fuel is limited between the inlet and outlet at least temporarily to allow an increase in fuel pressure required to actuate the nozzle arrangement.

Abstract: A spark ignited internal combustion engine includes a main combustion chamber, an auxiliary combustion chamber connected to the main combustion chamber, and fuel delivery means for supplying separate partial quantities of fuel to the main combustion chamber and auxiliary combustion chamber. Since the auxiliary combustion chamber is maintained at an elevated operating temperature and the partial quantity of fuel delivered to the auxiliary combustion chamber is an easily dissociable fuel, thermal dissociation of the easily dissociable fuel may occur prior to ignition.