Patents by Inventor Christoph Domland

Christoph Domland has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Controllable ignition system
    Patent number: 5553594
    Abstract: A method for controlling an ignition system for internal combustion engines where the sparking current together with the sparking period can be set to a particular value. The method described here makes it possible for each cylinder in the engine to be supplied with just the amount of ignition energy to meet the momentary requirement of the engine, and consequently a spark plug replacement interval of more than 100,000 km can be achieved. In accordance with the present invention, both the value of the sparking current and the value of its sparking period are controlled independently according to certain engine parameters, in particular load, engine speed and temperature. The method in accordance with the present invention can be applied preferably in an alternating current or high voltage capacitor ignition system.
    Type: Grant
    Filed: August 16, 1994
    Date of Patent: September 10, 1996
    Assignees: Volkswagen AG, Deutsche Automobilgesellschaft mbH
    Inventors: Karsten Ehlers, Christoph Domland, Andreas Sprysch
  • Electronic ignition system for gasoline internal combustion engines
    Patent number: 4558675
    Abstract: The invention relates to an electronic ignition system for gasoline internal combustion engines wherein a Hall sensor is used to generate the reference signal corresponding to the position of the crankshaft or the pistons in the cylinders. The ignition point is electronically controlled in dependence upon the speed and the load. In accordance with the invention, control information in the form of an information voltage is generated at at least one capacitor by the charging and discharging procedure controlled by the reference signal. To determine the ignition point, this information voltage is either compared with a d.c. voltage which is alterable in dependence upon load or it itself is altered in dependence upon load and compared with an unaltered d.c. voltage.
    Type: Grant
    Filed: August 8, 1984
    Date of Patent: December 17, 1985
    Assignee: Telefunken electronic GmbH
    Inventors: Willy Minner, Heinz-Hermann Spies, Christoph Domland
  • Ignition coil current control circuit
    Patent number: 4147145
    Abstract: A circuit for controlling the current supplied to an ignition coil is usable in conjunction with an electronic ignition. In one embodiment a transistor is connected in shunt with the input of a current amplifier and has a control electrode connected to a voltage divider a portion of which is in series with the coil, so that the transistor is responsive to both battery voltage and coil current. Excessive voltage or coil current causes the transistor to conduct thereby lowering the input signal to the current amplifier and reducing the coil current.
    Type: Grant
    Filed: June 18, 1976
    Date of Patent: April 3, 1979
    Assignee: Volkswagenwerk Aktiengesellschaft
    Inventors: Christoph Domland, Manfred Lotzmann