Inventor
PIERPONT DAVID A
US28 patents
⚠️ This page may combine multiple inventors who share the name “PIERPONT DAVID A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CATERPILLAR INC
26 patentsUS6412279B1Jul 2, 2002
Twin turbine exhaust gas re-circulation system having a second stage variable nozzle turbine
CATERPILLAR INC131 citations98
US6360732B1Mar 26, 2002
Exhaust gas recirculation cooling system
CATERPILLAR INC144 citations98
US6324847B1Dec 4, 2001
Dual flow turbine housing for a turbocharger in a divided manifold exhaust system having E.G.R. flow
CATERPILLAR INC125 citations98
US6378509B1Apr 30, 2002
Exhaust gas recirculation system having multifunction valve
CATERPILLAR INC61 citations96
US6484499B2Nov 26, 2002
Twin variable nozzle turbine exhaust gas recirculation system
CATERPILLAR INC23 citations93
US6484500B1Nov 26, 2002
Two turbocharger engine emission control system
CATERPILLAR INC54 citations93
US6321537B1Nov 27, 2001
Exhaust gas recirculation system in an internal combustion engine
CATERPILLAR INC39 citations93
US7201121B2Apr 10, 2007
Combustion engine including fluidically-driven engine valve actuator
CATERPILLAR INC46 citations92
US6883314B2Apr 26, 2005
Cooling of engine combustion air
CATERPILLAR INC42 citations92
US6640542B2Nov 4, 2003
Bypass venturi assembly with single shaft actuator for an exhaust gas recirculation system
CATERPILLAR INC20 citations92
US6460519B1Oct 8, 2002
Twin turbine exhaust gas re-circulation system having fixed geometry turbines
CATERPILLAR INC29 citations92
US6439212B1Aug 27, 2002
Bypass venturi assembly and elbow with turning vane for an exhaust gas recirculation system
CATERPILLAR INC28 citations92
US6397598B1Jun 4, 2002
Turbocharger system for an internal combustion engine
CATERPILLAR INC27 citations92
US6220233B1Apr 24, 2001
Exhaust gas recirculation system having variable valve timing and method of using same in an internal combustion engine
CATERPILLAR INC29 citations92
US7006910B2Feb 28, 2006
Engine power loss compensation
CATERPILLAR INC11 citations84
US6418721B1Jul 16, 2002
Two turbocharger exhaust gas re-circulation system having a first stage variable nozzle turbine
CATERPILLAR INC17 citations84
US6659092B2Dec 9, 2003
Bypass assembly with annular bypass venturi for an exhaust gas recirculation system
CATERPILLAR INC18 citations83
US6609373B2Aug 26, 2003
Exhaust gas recirculation system with variable geometry turbine and bypass venturi assembly
CATERPILLAR INC19 citations83
US9238996B2Jan 19, 2016
Piston having combustion bowl shaped to balance combustion efficiency and emission properties
CATERPILLAR INC6 citations80
US9234451B2Jan 12, 2016
Piston having combustion bowl shaped to balance combustion efficiency and emission properties
CATERPILLAR INC13 citations76
US10787976B1Sep 29, 2020
System and method for estimating cylinder pressure
CATERPILLAR INC2 citations71
US6912458B2Jun 28, 2005
Variable valve actuation control for operation at altitude
CATERPILLAR INC6 citations62
US10830168B1Nov 10, 2020
System and method for estimating exhaust manifold temperature
CATERPILLAR INC0 citations51
US11230992B2Jan 25, 2022
Piston geometry for reduced smoke and cylinder head component temperatures
CATERPILLAR INC0 citations50
US10982608B2Apr 20, 2021
System and method for estimating engine performance
CATERPILLAR INC0 citations50
US11499496B2Nov 15, 2022
Engine control system and method
CATERPILLAR INC0 citations48