Inventor
PFEIFFER JEFFREY M
US16 patents
⚠️ This page may combine multiple inventors who share the name “PFEIFFER JEFFREY M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
DELPHI TECH INC
12 patentsUS6393903B1May 28, 2002
Volumetric efficiency compensation for dual independent continuously variable cam phasing
DELPHI TECH INC20 citations92
US6758179B1Jul 6, 2004
Method and apparatus for controlling a variable valve system for an internal combustion engine
DELPHI TECH INC21 citations91
US6758177B1Jul 6, 2004
Method and apparatus to control a variable valve system
DELPHI TECH INC22 citations91
US6915767B2Jul 12, 2005
Method of determining the position of a cam phaser
DELPHI TECH INC20 citations87
US6550451B1Apr 22, 2003
Method of estimating residual exhaust gas concentration in a variable cam phase engine
DELPHI TECH INC17 citations84
US6718921B2Apr 13, 2004
Method and apparatus for cleaning an oil control valve for an internal combustion engine
DELPHI TECH INC13 citations79
US7350487B1Apr 1, 2008
Method for reducing phaser rotational instability in an internal combustion engine
DELPHI TECH INC5 citations62
US6561015B1May 13, 2003
Model-based method of estimating crankcase oil pressure in an internal combustion engine
DELPHI TECH INC6 citations62
US7571047B2Aug 4, 2009
Detection of valve deactivation failure by monitoring exhaust temperature
DELPHI TECH INC5 citations61
US6748910B2Jun 15, 2004
Method of bounding cam phase adjustment in an internal combustion engine
DELPHI TECH INC2 citations61
US6732691B1May 11, 2004
Engine phaser control system using phaser instability measurement
DELPHI TECH INC5 citations61
US6681172B2Jan 20, 2004
Model-based method of estimating crankcase oil temperature in an internal combustion engine
DELPHI TECH INC5 citations59