US 11,946,410 B1
Variable geometry turbocharger assessment
Matthew E. Layne, Chillicothe, IL (US); and Alok K. Puri, Washington, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Jun. 30, 2023, as Appl. No. 18/345,796.
Int. Cl. F02B 37/22 (2006.01); F02B 39/16 (2006.01); F02B 37/12 (2006.01)
CPC F02B 37/22 (2013.01) [F02B 39/16 (2013.01); F02B 2037/122 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A machine comprising:
a variable geometry turbocharger (VGT); and
a controller configured to:
determine, based on operation of the machine, that one or more VGT assessment initial conditions are satisfied;
cause, based on determining that the one or more VGT assessment initial conditions are satisfied, first adjustment of at least one component of the VGT to cause the VGT to restrict a flow of exhaust gas through the VGT and to cause a speed of the VGT to increase to be greater than or equal to a first speed threshold;
determine, based on causing the first adjustment of the at least one component of the VGT, that the speed of the VGT is stable for a period of time;
cause, based on determining that the speed of the VGT is stable for the period of time, second adjustment of the at least one component of the VGT to cause the VGT to cease restricting the flow of exhaust gas through the VGT and to cause the speed of the VGT to decrease to be less than or equal to a second speed threshold;
determine, based on causing the second adjustment of the at least one component of the VGT, an amount of time for the speed of the VGT to decrease from greater than or equal to the first speed threshold to less than or equal to the second speed threshold;
determine, based on the amount of time, VGT assessment information; and
cause, based on the VGT assessment information, one or more actions to be performed.