Patents by Inventor Ryan D Martini

Ryan D Martini 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).

  • Method and apparatus to monitor rotational speeds in an electro-mechanical transmission
    Patent number: 8281885
    Abstract: A powertrain includes an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine and an electric machine to selectively transmit mechanical power to an output member. Powertrain operation includes monitoring operator inputs, and determining input speeds and changes in input speeds for the internal combustion engine and the electric machine. The input speeds are compared to threshold input speeds, and the changes in input speeds are compared to threshold changes in input speeds. Input torques of the internal combustion engine and the electric machine are reduced when any one of the input speeds and changes in input speeds exceeds the corresponding threshold.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: October 9, 2012
    Assignees: GM Global Technology Operations LLC, Daimler AG, Chrysler Group LLC, Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Andrew M. Zettel, Charles J Van Horn, Peter E. Wu, Ryan D Martini, Anthony H. Heap
  • Method for monitoring an auxiliary pump for a hybrid powertrain
    Patent number: 8068966
    Abstract: A powertrain system includes a hybrid transmission coupled to an engine and an auxiliary hydraulic pump. The auxiliary hydraulic pump is commanded to operate at a predetermined speed only when enable criteria are met. An engine-off state is inhibited based upon a difference between a commanded speed and a monitored operating speed of the auxiliary hydraulic pump.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: November 29, 2011
    Assignees: GM Global Technology Operations LLC, Daimler AG, Chrysler LLC, Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Peter E. Wu, Ali K Naqvi, Rebecca Trierweiler, Syed Naqi, Ryan D Martini
  • Method and apparatus to monitor a flow management valve of an electro-mechanical transmission
    Patent number: 7869924
    Abstract: A flow management valve is operative to enable a multi-range electro-mechanical transmission in first and second ranges. Fluid pressure in a hydraulic circuit is monitored to detect a fault in the flow management valve.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: January 11, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Peter E. Wu, Ryan D Martini, Andrew M. Zettel, Charles J Van Horn, Thomas E Mathews, Kambiz Panahi
  • Electro-mechanical transmission control system
    Patent number: 7867135
    Abstract: A system for robust fault detection in an electrically variable, hydraulically controlled transmission includes independently monitoring hydraulic pressure within a hydraulic control circuit and electric machine rotation for detecting clutch state faults.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: January 11, 2011
    Assignee: GM Global Technology Operations LLC
    Inventors: Peter E. Wu, Ryan D Martini, Syed Naqi, Jy-Jen F. Sah, Osama Almasri, Hanne Buur, Andrew M. Zettel, Charles J Van Horn
  • Method and apparatus for monitoring a thermal management system of an electro-mechanical transmission
    Patent number: 7848902
    Abstract: Temperature of an electric power device of a hybrid transmission is managed based upon device temperatures and power flow, ambient temperature, and a cooling circuit flow rate.
    Type: Grant
    Filed: October 10, 2007
    Date of Patent: December 7, 2010
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Andrew M. Zettel, Charles J Van Horn, Peter E. Wu, Ryan D Martini, Wei D. Wang, Stephen T. West
  • ELECTRO-MECHANICAL TRANSMISSION CONTROL SYSTEM
    Publication number: 20090082150
    Abstract: A system for robust fault detection in an electrically variable, hydraulically controlled transmission includes independently monitoring hydraulic pressure within a hydraulic control circuit and electric machine rotation for detecting clutch state faults.
    Type: Application
    Filed: September 26, 2007
    Publication date: March 26, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Peter E. Wu, Ryan D Martini, Syed Naqi, Jy-Jen F. Sah, Osama Almasri, Hanne Buur, Andrew M. Zettel, Charles J. Van Horn