Inventor
DUFFY KEVIN P
US28 patents
⚠️ This page may combine multiple inventors who share the name “DUFFY KEVIN P”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CATERPILLAR INC
24 patentsUS6467452B1Oct 22, 2002
Method and apparatus for delivering multiple fuel injections to the cylinder of an internal combustion engine
CATERPILLAR INC102 citations98
US6651618B1Nov 25, 2003
Air and fuel supply system for combustion engine
CATERPILLAR INC106 citations97
US7252054B2Aug 7, 2007
Combustion engine including cam phase-shifting
CATERPILLAR INC34 citations92
US7201121B2Apr 10, 2007
Combustion engine including fluidically-driven engine valve actuator
CATERPILLAR INC46 citations92
US7191743B2Mar 20, 2007
Air and fuel supply system for a combustion engine
CATERPILLAR INC20 citations92
US7178492B2Feb 20, 2007
Air and fuel supply system for combustion engine
CATERPILLAR INC33 citations92
US6691671B2Feb 17, 2004
Method and apparatus for delivering multiple fuel injections to the cylinder of an internal combustion engine
CATERPILLAR INC24 citations92
US6491018B1Dec 10, 2002
Method and apparatus for delivering multiple fuel injections to the cylinder of an internal combustion engine
CATERPILLAR INC15 citations92
US6470849B1Oct 29, 2002
Separate injector main timing maps for use with and without pilot
CATERPILLAR INC42 citations92
US6453874B1Sep 24, 2002
Apparatus and method for controlling fuel injection signals during engine acceleration and deceleration
CATERPILLAR INC20 citations92
US6390082B1May 21, 2002
Method and apparatus for controlling the current level of a fuel injector signal during sudden acceleration
CATERPILLAR INC39 citations92
US6843231B1Jan 18, 2005
Cylinder to cylinder balancing using intake valve actuation
CATERPILLAR INC43 citations91
US7469181B2Dec 23, 2008
High load operation in a homogeneous charge compression ignition engine
CATERPILLAR INC27 citations90
US7380540B1Jun 3, 2008
Dynamic control of a homogeneous charge compression ignition engine
CATERPILLAR INC20 citations89
US7198024B2Apr 3, 2007
Low emissions compression ignited engine technology
CATERPILLAR INC16 citations84
US6606974B1Aug 19, 2003
Partitioning of a governor fuel output into three separate fuel quantities in a stable manner
CATERPILLAR INC16 citations84
US7422000B2Sep 9, 2008
Method of transitioning between operating modes in an internal combustion engine
CATERPILLAR INC17 citations83
US7219649B2May 22, 2007
Engine system and method of operating same over multiple engine load ranges
CATERPILLAR INC11 citations83
US7377270B2May 27, 2008
Exhaust gas recirculation in a homogeneous charge compression ignition engine
CATERPILLAR INC12 citations82
US6845747B2Jan 25, 2005
Method of utilizing multiple fuel injections to reduce engine emissions at idle
CATERPILLAR INC14 citations80
USRE40144EMar 11, 2008
Method and apparatus for delivering multiple fuel injections to the cylinder of an internal combustion engine
CATERPILLAR INC6 citations73
US7201137B2Apr 10, 2007
Mixed mode control method and engine using same
CATERPILLAR INC9 citations73
US7377254B2May 27, 2008
Extending operating range of a homogeneous charge compression ignition engine via cylinder deactivation
CATERPILLAR INC8 citations72
US7210640B2May 1, 2007
Fuel injector spray alteration through a moveable tip sleeve
CATERPILLAR INC5 citations60
EXXONMOBIL RES & ENG CO
2 patentsUS7487663B2Feb 10, 2009
Method for selecting fuel to both optimize the operating range and minimize the exhaust emissions of HCCI engines
EXXONMOBIL RES & ENG CO14 citations80
US7131402B2Nov 7, 2006
Method for controlling exhaust emissions from direct injection homogeneous charge compression ignition engines
EXXONMOBIL RES & ENG CO12 citations78