Patents Assigned to Allison Transmisssion, Inc.
  • Hydraulic system and method for a hybrid vehicle
    Patent number: 9108499
    Abstract: A hydraulic system for a hybrid module which is located between an engine and a transmission includes a parallel arrangement of a mechanical pump and an electric pump. Each pump is constructed and arranged to deliver oil to other portions of the hydraulic system depending on the operational mode. Three operational modes are described including an electric mode, a transition mode, and a cruise mode. Various monitoring and control features are incorporated into the hydraulic system.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: August 18, 2015
    Assignee: Allison Transmisssion, Inc.
    Inventors: Charles F. Long, Charles T. Taylor