Method and apparatus for determining the upper dead-center position with piston engines

An apparatus for determining an upper dead-center position of a piston in piston engines, in which the crankshaft angle corresponding to a maximum compression pressure is determined by a pressure measurement, characterized in that means are provided detecting a thermodynamic loss angle conditioned by heat transfer and leakage losses including a pressure-measuring transmitter means and a distance-measuring transmitter means combined into a single mounting unit.

An apparatus for determining an upper dead center position of pistons in a piston engine, in which the crankshaft angle corresponding to a maximum compression pressure is determined by a pressure measurement and a correcting factor is added that corresponds to the thermodynamic loss angle conditioned by heat-transfer and leakage losses, characterized by a pressure-measuring transmitter means and a distance-measuring transmitter means which are combined into a single mounting unit and in that the distance measuring transmitter means is a capacitive distance-measuring transmitter.

An apparatus for determining an upper dead center portion of pistons in a piston engine, in which the crankshaft angle corresponding to a maximum compression pressure is determined by a pressure measurement and a correcting factor is added that corresponds to the thermodynamic loss angle conditioned by heat-transfer and leakage losses, the distance measuring transmitter means is characterized by a pressure measuring transmitter means and a distance-measuring transmitter means which are combined into a single mounting unit and in that the distance measuring transmitter means is an inductive distance-measuring transmitter.

An apparatus, for determining an upper dead center portion of pistons in a piston engine, in which the crankshaft angle corresponding to a maximum compression pressure is determined by a pressure measurement and a correcting factor is added that corresponds to the thermodynamic loss angle conditioned by heat-transfer and leakage losses, characterized by a pressure-measuring transmitter means and a distance-measuring transmitter means which are combined into a single mounting unit and in that the distance measuring transmitter means is a capacitive distance-measuring transmitter and in that the single mounting unit includes a screw-in thread, and a pressure-connecting bore adjoining the screw in thread, the pressure connecting bore is coordinated to the pressure-measuring transmitter means and is disposed substantially transversely to an axis of the thread.

An apparatus for determining an upper dead-center position of pistons in piston engines, the apparatus comprising means for determining a crankshaft angle corresponding to a maximum compression pressure by a pressure measurement and means for detecting a thermodynamic loss angle conditioned by heat transfer and leakage losses.