Patents by Inventor Manfred Lotzmann

Manfred Lotzmann 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).

  • 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