Patents by Inventor Alistair James DALES

Alistair James DALES 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 for estimating the efficiency loss of a turbocharger for an engine
    Patent number: 11959429
    Abstract: The present disclosure relates to improvements in turbocharger efficiency and more particularly to a method and system for estimating the efficiency loss of a turbocharger. The method comprises the steps of monitoring a plurality of operating parameters and determining a compressor exit temperature according to a first calibration map based on these operating parameters. An estimate of instantaneous turbocharger efficiency loss according to a second calibration map is then determined, based on the compressor exit temperature. The instantaneous turbocharger efficiency loss is used to determine an estimate of cumulative turbocharger efficiency loss during engine service. The estimate of cumulative turbocharger efficiency loss is compared with a first predetermined efficiency loss threshold and a first signal is generated if the first predetermined efficiency loss threshold is exceeded.
    Type: Grant
    Filed: February 1, 2021
    Date of Patent: April 16, 2024
    Assignee: Caterpillar Inc.
    Inventors: Stuart Paul Smith, Alistair James Dales, Ross Daniel Collins
  • METHOD FOR ESTIMATING THE EFFICIENCY LOSS OF A TURBOCHARGER FOR AN ENGINE
    Publication number: 20230086963
    Abstract: The present disclosure relates to improvements in turbocharger efficiency and more particularly to a method and system for estimating the efficiency loss of a turbocharger. The method comprises the steps of monitoring a plurality of operating parameters and determining a compressor exit temperature according to a first calibration map based on these operating parameters. An estimate of instantaneous turbocharger efficiency loss according to a second calibration map is then determined, based on the compressor exit temperature. The instantaneous turbocharger efficiency loss is used to determine an estimate of cumulative turbocharger efficiency loss during engine service. The estimate of cumulative turbocharger efficiency loss is compared with a first predetermined efficiency loss threshold and a first signal is generated if the first predetermined efficiency loss threshold is exceeded.
    Type: Application
    Filed: February 1, 2021
    Publication date: March 23, 2023
    Applicant: Caterpillar Inc.
    Inventors: Stuart Paul SMITH, Alistair James DALES, Ross Daniel COLLINS