Patents by Inventor Karl Victor Perttunen

Karl Victor Perttunen 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).

  • Four-wheel drive transfer case controller with compensation for tires with different diameters
    Patent number: 5809443
    Abstract: A four-wheel drive vehicle includes a transfer case for controlling the delivery of power between the front and rear wheels of the vehicle. A clutch in the transfer case controls the amount of power delivered to the front and rear wheels in response to a clutch PulseWidth Modulated (PWM) signal which is generated by an electronic powertrain controller. The powertrain controller receives a first signal which is indicative of the rotational speed of a front driveshaft, which transfers motive power from the transfer case to a pair of front wheels, and a second signal which is indicative of the rotational speed of a rear driveshaft, which transfers motive power from the transfer case to a pair of rear wheels.
    Type: Grant
    Filed: December 9, 1994
    Date of Patent: September 15, 1998
    Assignee: Ford Motor Company
    Inventors: Karl Victor Perttunen, Patrick William Gibson