Patents by Inventor Purna C. Nalla

Purna C. Nalla 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 engine valve lash calibration
    Patent number: 11268411
    Abstract: A method for adjusting a valve lash in an internal combustion engine includes receiving a first signal generated by a sensor secured to the internal combustion engine, the first signal being indicative of a closing of a valve, receiving a second signal indicative of at least one of an engine speed of the internal combustion engine or a position of a camshaft of the internal combustion engine, and automatically determining an adjusted amount of lash associated with the valve based on the received first signal and the received second signal. The method also includes comparing the adjusted amount of lash to at least one predetermined threshold, and providing, in response to determining that the adjusted amount of lash is greater than the at least one predetermined threshold, a valve lash re-adjustment notification.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: March 8, 2022
    Assignee: Caterpillar Inc.
    Inventors: Yifeng Lu, Yanchai Zhang, Zhaoxu Dong, Nathan S. Pauli, Xuefei Hu, Purna C. Nalla, Brian W. Young, James D. Siegle
  • SYSTEM AND METHOD FOR ENGINE VALVE LASH CALIBRATION
    Publication number: 20210381401
    Abstract: A method for adjusting a valve lash in an internal combustion engine includes receiving a first signal generated by a sensor secured to the internal combustion engine, the first signal being indicative of a closing of a valve, receiving a second signal indicative of at least one of an engine speed of the internal combustion engine or a position of a camshaft of the internal combustion engine, and automatically determining an adjusted amount of lash associated with the valve based on the received first signal and the received second signal. The method also includes comparing the adjusted amount of lash to at least one predetermined threshold, and providing, in response to determining that the adjusted amount of lash is greater than the at least one predetermined threshold, a valve lash re-adjustment notification.
    Type: Application
    Filed: June 5, 2020
    Publication date: December 9, 2021
    Inventors: Yifeng Lu, Yanchai Zhang, Zhaoxu Dong, Nathan S. Pauli, Xuefei Hu, Purna C. Nalla, Brian W. Young, James D. Siegle