US 12,258,899 B1
Variable geometry turbocharger control
Kevin Weiss, Peoria, IL (US); James Mutti, Germantown Hills, IL (US); Ryan Treanor, Peoria, IL (US); Nicholas Williams, Dunlap, IL (US); and Emanuelle Carduner, Peoria, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Oct. 25, 2023, as Appl. No. 18/494,582.
Int. Cl. F02B 37/24 (2006.01); F01D 7/02 (2006.01); F01D 17/14 (2006.01); F02B 37/12 (2006.01); F02D 41/00 (2006.01); F02D 41/04 (2006.01)
CPC F02B 37/24 (2013.01) [F01D 17/14 (2013.01); F01D 7/02 (2013.01); F02B 37/12 (2013.01); F02B 2037/122 (2013.01); F02D 41/0007 (2013.01); F02D 41/04 (2013.01); F05D 2220/40 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A machine comprising:
a single variable geometry turbocharger (VGT); and
a controller configured to:
cause the VGT to operate according to a non-dynamic control scheme;
monitor, based on the causing the VGT to operate according to the non-dynamic control scheme, a plurality of hardware limit parameters associated with an engine of the machine during a first time period, the plurality of hardware limit parameters including at least two of: a peak cylinder pressure parameter; a VGT speed parameter; a compressor surge parameter; a compressor choke parameter; or an exhaust temperature parameter;
determine, based on the monitoring the plurality of hardware limit parameters during the first time period, that a hardware limit parameter, of the plurality of hardware limit parameters, satisfies a dynamic threshold for the hardware limit parameter;
cause, based on the determining that the hardware limit parameter satisfies the dynamic threshold, the VGT to operate according to a dynamic control scheme;
monitor, based on the causing the VGT to operate according to the dynamic control scheme, the plurality of hardware limit parameters during a second time period;
determine, based on the monitoring the plurality of hardware limit parameters during the second time period, that each said hardware limit parameter, of the plurality of hardware limit parameters, satisfies a non-dynamic threshold for the hardware limit parameter; and
cause, based on the determining that each hardware limit parameter satisfies the non-dynamic threshold for the hardware limit parameter, the VGT to operate again according to the non-dynamic control scheme,
wherein the controller, to cause the VGT to operate according to the dynamic control scheme, is configured to:
implement a first time difference threshold,
determine a first time at which the controller determined the hardware limit parameter satisfies the dynamic threshold for the hardware limit parameter, and
cause, at a second time after the first time, and responsive to the second time reaching or exceeding the first time difference threshold, the VGT to operate according to the dynamic control scheme.