Patents by Inventor Keji Wakahara

Keji Wakahara 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).

  • Thermostat malfunction detecting system for engine cooling system
    Publication number: 20040168510
    Abstract: A malfunction of a thermostat in a coolant circulating path is detected from an engine side coolant temperature in consideration of the following behavior of the coolant temperature. When an open-malfunction occurs, the coolant temperature becomes different considerably from that in the normal time in the temperature range in which the thermostat is to be normally closed. When a closure-malfunction occurs, the coolant temperature becomes different considerably from that during the normal time in the temperature range in which the thermostat is to be normally opened. Alternatively, the malfunction may be detected from a difference between the engine side coolant temperature and a radiator side coolant temperature.
    Type: Application
    Filed: March 3, 2004
    Publication date: September 2, 2004
    Applicant: DENSO CORPORATION
    Inventors: Keji Wakahara, Akira Ichikawa