Fluid Circuit Controlled Patents (Class 475/64)
  • Patent number: 8192318
    Abstract: An automatic transmission is disclosed that includes a clutch pressure control module housing having therein: (1) a plurality of solenoid valves, each of the solenoid valves configured to receive an input of the pressurized hydraulic fluid and to provide a variable output pressure of pressurized hydraulic fluid in response to an electric control signal; (2) means for sensing output pressure from each of the solenoid valves of the plurality of solenoid valves; and (3) electronic control means configured to generate electric control signals to one or more of the solenoid valves of the plurality of solenoid valves in response to (i) a clutch pressure command signal or a solenoid pressure command signal, and (ii) a solenoid output pressure signal from the means for sensing output pressure. The solenoid valves provide hydraulic control signals to clutch hydraulic pressure control valves, which in turn provide hydraulic power to clutch actuators.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: June 5, 2012
    Assignee: Delphi Technologies, Inc.
    Inventors: Duane Z. Collins, Andrew D. Herman, Michael A. Kozan, Quan Zheng
  • Patent number: 8095284
    Abstract: An automatic transmission control unit determines whether or not a constantly open failure, in which a switch valve cannot switch a pressure regulating valve and a second hydraulic chamber to a non-communicative state, has occurred on the basis of a parameter (an inertia phase time, for example) representing a dynamic characteristic during a shift from a first gear position to a second gear position. The determination of the constantly open failure is begun after initial variation in the parameter representing the dynamic characteristic during the shift has been eliminated through learning control in which the dynamic characteristic during the shift is caused to approach a target dynamic characteristic.
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: January 10, 2012
    Assignee: JATCO Ltd
    Inventors: Fumitaka Nagashima, Hajime Tasaka, Yoshihide Shinso