Patents by Inventor Derek Hiemstra

Derek Hiemstra 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).

  • System and method for regenerating an auxiliary power unit exhaust filter
    Patent number: 9273585
    Abstract: This disclosure relates to a method for controlling a system for regenerating a diesel particulate filter. The method includes monitoring an engine run time that has lapsed since a previous regeneration event. The method also includes monitoring backpressure behind the diesel particulate filter. The method further includes triggering a regeneration flag if the engine run time that lapsed since the previous regeneration event reaches a predetermined time limit and the backpressure exceeds a minimum value.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: March 1, 2016
    Assignee: Donaldson Company, Inc.
    Inventors: John Hiemstra, Eivind Stenersen, Wenzhong Zhang, Allan T. Hovda, Gary Dale Reeves, Josh Kundert, Wayne M. Wagner, Todd R. Taubert, Derek Hiemstra, Scott Peters
  • System and method to regenerate a diesel particulate filter
    Patent number: 8061129
    Abstract: An exhaust system for use with a diesel engine includes a diesel particulate filter configured to capture particulate matter exhausted from the diesel engine, a first sensor operable to detect a particulate matter accumulation level within the diesel particulate filter, and a second sensor operable to detect an ambient temperature of an environment surrounding the diesel particulate filter. The exhaust system also includes a control module electrically coupled to the first sensor, the second sensor, and the diesel particulate filter. The control module is operable to adjust a first regeneration threshold based on the detected ambient temperature. The control module is also operable to initiate regeneration of the diesel particulate filter when the detected particulate matter accumulation level reaches the first regeneration threshold.
    Type: Grant
    Filed: January 30, 2009
    Date of Patent: November 22, 2011
    Assignee: Thermo King Corporation and Donaldson Company, Inc.
    Inventors: Jill N. Irlbeck, Erich Albert Lucht, John Hiemstra, Allan T. Hovda, John Jacob Shaw, Gary Reeves, Greg Truckenbrod, Wenzhong Zhang, John Wiese, Eivind Stenersen, Scott Peters, Derek Hiemstra, Josh Kundert
  • SYSTEM AND METHOD TO REGENERATE A DIESEL PARTICULATE FILTER
    Publication number: 20100192548
    Abstract: An exhaust system for use with a diesel engine includes a diesel particulate filter configured to capture particulate matter exhausted from the diesel engine, a first sensor operable to detect a particulate matter accumulation level within the diesel particulate filter, and a second sensor operable to detect an ambient temperature of an environment surrounding the diesel particulate filter. The exhaust system also includes a control module electrically coupled to the first sensor, the second sensor, and the diesel particulate filter. The control module is operable to adjust a first regeneration threshold based on the detected ambient temperature. The control module is also operable to initiate regeneration of the diesel particulate filter when the detected particulate matter accumulation level reaches the first regeneration threshold.
    Type: Application
    Filed: January 30, 2009
    Publication date: August 5, 2010
    Inventors: Jill N. Irlbeck, Erich Albert Lucht, John Hiemstra, Allan T. Hovda, John Jacob Shaw, Gary Reeves, Greg Truckenbrod, Wenzhong Zhang, John Wiese, Eivind Stenersen, Scott Peters, Derek Hiemstra, Josh Kundert