Patents by Inventor Philip Ling

Philip Ling 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).

  • Variable timing ignition circuit including conditional ignition retarding
    Patent number: 5517962
    Abstract: A variable integration based ignition circuit for an internal combustion engine recognizes predetermined engine conditions and modifies or limits ignition advance when the predetermined conditions are violated to protect the engine. The ignition circuit includes an ignition triggering circuit which causes the engine ignition to ignite in response to ignition pulse signals. A pulse generator generates and outputs signal pulses when the sensor detects positions of the crankshaft. A speed detector calculates the rotational speed of the flywheel based on the signal pulses. Ignition pulse signals are retarded when the rotational speed exceeds a predetermined level to limit rotational speed and protect the engine. The ignition circuit may also limit ignition pulse signals in response to low oil pressure.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: May 21, 1996
    Assignee: Outboard Marine Corporation
    Inventor: Philip Ling