Inventor
GRAY JR CHARLES L
US82 patents
⚠️ This page may combine multiple inventors who share the name “GRAY JR CHARLES L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
US ENVIRONMENT
30 patentsUS6719080B1Apr 13, 2004
Hydraulic hybrid vehicle
US ENVIRONMENT206 citations99
US6651432B1Nov 25, 2003
Controlled temperature combustion engine
US ENVIRONMENT197 citations99
US6301888B1Oct 16, 2001
Low emission, diesel-cycle engine
US ENVIRONMENT226 citations99
US7456509B2Nov 25, 2008
Methods of operating a series hybrid vehicle
US ENVIRONMENT62 citations98
US6202416B1Mar 20, 2001
Dual-cylinder expander engine and combustion method with two expansion strokes per cycle
US ENVIRONMENT90 citations98
US5887674AMar 30, 1999
Continuously smooth transmission
US ENVIRONMENT123 citations98
US6857263B2Feb 22, 2005
Low emission diesel combustion system with low charge-air oxygen concentration levels and high fuel injection pressures
US ENVIRONMENT69 citations97
US6876098B1Apr 5, 2005
Methods of operating a series hybrid vehicle
US ENVIRONMENT66 citations96
US6619325B2Sep 16, 2003
Hydraulic hybrid accumulator shut-off valve
US ENVIRONMENT54 citations96
US6216462B1Apr 17, 2001
High efficiency, air bottoming engine
US ENVIRONMENT75 citations96
US6170524B1Jan 9, 2001
Fast valve and actuator
US ENVIRONMENT66 citations96
US7108016B2Sep 19, 2006
Lightweight low permeation piston-in-sleeve accumulator
US ENVIRONMENT65 citations95
US7857082B2Dec 28, 2010
Methods of operating a series hybrid vehicle
US ENVIRONMENT16 citations93
US7374005B2May 20, 2008
Opposing pump/motors
US ENVIRONMENT41 citations93
US7237532B2Jul 3, 2007
Methods of operation for controlled temperature combustion engines using gasoline-like fuel, particularly multicylinder homogenous charge compression ignition (HCCI) engines
US ENVIRONMENT22 citations93
US7121304B2Oct 17, 2006
Low permeation hydraulic accumulator
US ENVIRONMENT27 citations93
US7047933B2May 23, 2006
Low emission fuel for use with controlled temperature combustion, direct injection, compression ignition engines
US ENVIRONMENT32 citations93
US7047741B2May 23, 2006
Methods for low emission, controlled temperature combustion in engines which utilize late direct cylinder injection of fuel
US ENVIRONMENT49 citations93
US7032385B2Apr 25, 2006
Multi-crankshaft, variable-displacement engine
US ENVIRONMENT18 citations93
US7024858B2Apr 11, 2006
Multi-crankshaft, variable-displacement engine
US ENVIRONMENT25 citations93
US7025042B2Apr 11, 2006
Methods of operation for controlled temperature combustion engines using gasoline-like fuel, particularly multicylinder homogenous charge compression ignition (HCCI) engines
US ENVIRONMENT32 citations93
US6578533B1Jun 17, 2003
Controlled homogeneous-charge, compression-ignition engine
US ENVIRONMENT42 citations93
US6301891B2Oct 16, 2001
High efficiency, air bottoming engine
US ENVIRONMENT24 citations93
US6386154B1May 14, 2002
Pumped EGR system
US ENVIRONMENT48 citations92
US7984783B2Jul 26, 2011
Hydraulic hybrid vehicle with integrated hydraulic drive module and four-wheel-drive, and method of operation thereof
US ENVIRONMENT15 citations91
US7537075B2May 26, 2009
Hydraulic hybrid vehicle with integrated hydraulic drive module and four-wheel-drive, and method of operation thereof
US ENVIRONMENT15 citations91
US7337869B2Mar 4, 2008
Hydraulic hybrid vehicle with integrated hydraulic drive module and four-wheel-drive, and method of operation thereof
US ENVIRONMENT21 citations91
US7252020B2Aug 7, 2007
Vehicle drive-train including a clutchless transmission, and method of operation
US ENVIRONMENT22 citations91
US7014429B2Mar 21, 2006
High-efficiency, large angle, variable displacement hydraulic pump/motor
US ENVIRONMENT19 citations88
US8381851B2Feb 26, 2013
Methods of operating a series hybrid vehicle
US ENVIRONMENT12 citations84
US ARMY
8 patentsUS5579640ADec 3, 1996
Accumulator engine
US ARMY164 citations98
US5495912AMar 5, 1996
Hybrid powertrain vehicle
US ARMY302 citations96
US5609131AMar 11, 1997
Multi-stage combustion engine
US ARMY56 citations95
US5507144AApr 16, 1996
Lightweight, safe hydraulic power system and a method of operation thereof
US ARMY77 citations94
US5505527AApr 9, 1996
Anti-lock regenerative braking system
US ARMY102 citations94
US5611300AMar 18, 1997
Floating piston, piston-valve engine
US ARMY29 citations93
US5562079AOct 8, 1996
Low-temperature, near-adiabatic engine
US ARMY48 citations93
US5549087AAug 27, 1996
Combined cycle engine
US ARMY49 citations92
US ADM UNITED STATES ENVIRONME
6 patentsUS6470682B2Oct 29, 2002
Low emission, diesel-cycle engine
US ADM UNITED STATES ENVIRONME214 citations99
US7104349B2Sep 12, 2006
Hybrid powertrain motor vehicle with homogenous charge compression ignition (HCCI) engine, and method of operation thereof
US ADM UNITED STATES ENVIRONME22 citations93
US6752105B2Jun 22, 2004
Piston-in-piston variable compression ratio engine
US ADM UNITED STATES ENVIRONME36 citations93
US6652247B2Nov 25, 2003
Fully-controlled, free-piston engine
US ADM UNITED STATES ENVIRONME18 citations93
US6189493B1Feb 20, 2001
Torque balanced opposed-piston engine
US ADM UNITED STATES ENVIRONME38 citations93
US6186126B1Feb 13, 2001
Phase change heat engine
US ADM UNITED STATES ENVIRONME45 citations93
TEXACO INC
2 patentsGRAY JR CHARLES L
1 patentUS ENVIRONMENTAL PROTECTION
1 patentUS OF AMERICA AS REPRESENTED BY THE ADMINISTRATOR OF THE U S ENVIRONMENTAL PROT AGENCY
1 patentUS ADM U S ENVIRONMENTAL AGENC
1 patentShowing the top 50 of 82 patents by PatentIndex Score.