Patents by Inventor Karen L. Marx

Karen L. Marx 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).

  • Range control method for lever shifted compound transmissions
    Patent number: 6979279
    Abstract: A controller-assisted, manually shifted transmission system having a control system and method for controlling automatic range shifts are disclosed. Automatic range shifts are determined by control logic utilizing predetermined logic rules to evaluate transmission system criteria. The control logic determines a set of potential target gear ratios. Engine overspeed tests evaluate the set of potential target gear ratios in combination with the transmission system criteria. The appropriate range shift is determined and executed based on the selected target gear ratio.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: December 27, 2005
    Assignee: Eaton Corporation
    Inventors: Douglas A. Hughes, Karen L. Marx
  • Adaptive engine control for shifting to neutral
    Patent number: 6520889
    Abstract: A method/system for adaptively controlling engine fueling during disengagement of a jaw clutch (70) while maintaining the vehicle master friction clutch (20) engaged. Engine torque is initially commanded to a zero drive line torque value (114) and, after a period of time (T2−T1) if non-torque lock is sensed ((d/dt(SLY-Y))<REF), than a torque bump (128) engine fueling routine is initiated.
    Type: Grant
    Filed: November 1, 2000
    Date of Patent: February 18, 2003
    Assignee: Eaton Corporation
    Inventors: Douglas A. Hughes, Karen L. Marx
  • VEHICLE SYNCHRONIZATION ALGORITHM FOR DRIVELINE PROTECTION
    Publication number: 20020151410
    Abstract: A method/system for controlling an automated mechanical transmission system (10) utilized on a vehicle and having a manually operated master friction clutch operator (48). To protect from driveline damage due to dynamic clutch “popping,” upon sensing dynamic vehicle conditions (OS>REFVSPEED) and clutch (16) not engaged, transmission (14) engaged and THL>REFTHL, a controller (28) causes engine speed (ES) to be limited to a target value (EST) substantially equal to input shaft speed (IS).
    Type: Application
    Filed: April 4, 2001
    Publication date: October 17, 2002
    Applicant: Eaton Corporation, Eaton Center
    Inventors: Mark D. Boardman, Karen L. Marx
  • Vehicle synchronization algorithm for driveline protection
    Patent number: 6461272
    Abstract: A method/system for controlling an automated mechanical transmission system (10) utilized on a vehicle and having a manually operated master friction clutch operator (48). To protect from driveline damage due to dynamic clutch “popping,” upon sensing dynamic vehicle conditions (OS >REFVSPEED) and clutch (16) not engaged, transmission (14) engaged and THL>REFTHL, a controller (28) causes engine speed (ES) to be limited to a target value (EST) substantially equal to input shaft speed (IS).
    Type: Grant
    Filed: April 4, 2001
    Date of Patent: October 8, 2002
    Assignee: Eaton Corporation
    Inventors: Mark D. Boardman, Karen L. Marx
  • System/method for synchronized shifting of a manually shifted transmission
    Patent number: 6361473
    Abstract: A controller-assisted, manually shifted transmission system (10) utilizes a shift inhibit mechanism (48) to inhibit out-of-synchronous shifts and unintended disengagement of ratios. An intent to shift (ITS) and target ratio (GRT) are determined from a shift lever position sensor (46) and a force sensor (50).
    Type: Grant
    Filed: April 27, 2000
    Date of Patent: March 26, 2002
    Assignee: Eaton Corporation
    Inventors: Paul J. Mason, Alan C. Stine, Douglas C. Hughes, Karen L. Marx
  • System/method for lever shifting of a controller-assisted, manually shifted transmission
    Patent number: 6358183
    Abstract: A control system/method for a controller-assisted, manually shifted transmission system (10) senses incomplete jaw clutch engagement (FIGS. 7A and 7B) and causes the engine to dither about zero driveline torque to allow the vehicle operator to fully engage (FIG. 7C) the engaging jaw clutch (200).
    Type: Grant
    Filed: April 27, 2000
    Date of Patent: March 19, 2002
    Assignee: Eaton Corporation
    Inventors: Douglas A. Hughes, Karen L. Marx, Ronald K. Markyvech
  • Synchronizing control and method
    Patent number: 6319171
    Abstract: A control system/method for a controller-assisted, manually shifted transmission system (10). Upon sensing an intent to initiate a lever shift (ITS), the target gear ratio (GRT) is assumed to be a single shift from the currently engaged ratio (GRT=GRC±1) until a delay period of time (TDELAY) expires. After the delay period (T>TDELAY), the target ratio is determined as a function of shift lever position (SL) and/or fore/aft force (FF/FA) on the shift lever (48).
    Type: Grant
    Filed: April 27, 2000
    Date of Patent: November 20, 2001
    Assignee: Eaton Corporation
    Inventors: Douglas A. Hughes, Karen L. Marx