Inventor
SIMPSON ROGER
US13 patents
⚠️ This page may combine multiple inventors who share the name “SIMPSON ROGER”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BORGWARNER INC
12 patentsUS6571757B1Jun 3, 2003
Variable force solenoid with spool position feedback to control the position of a center mounted spool valve to control the phase angle of cam mounted phaser
BORGWARNER INC52 citations92
US6622675B1Sep 23, 2003
Dual PWM control of a center mounted spool value to control a cam phaser
BORGWARNER INC20 citations83
US6883475B2Apr 26, 2005
Phaser mounted DPCS (differential pressure control system) to reduce axial length of the engine
BORGWARNER INC8 citations73
US6814037B1Nov 9, 2004
Variable camshaft timing for internal combustion engine with actuator locking
BORGWARNER INC10 citations73
US6766777B2Jul 27, 2004
Method to ensure robust operation of a pin lock in a vane style cam phaser
BORGWARNER INC9 citations73
US6748912B2Jun 15, 2004
Method to vent air from a cam phaser with a center mounted spool valve
BORGWARNER INC7 citations73
US6729283B2May 4, 2004
Externally mounted vacuum controlled actuator with position sensor control means to reduce functional and magnetic hysteresis
BORGWARNER INC8 citations73
US6622677B2Sep 23, 2003
Worm gear driven variable cam phaser
BORGWARNER INC8 citations73
US10006321B2Jun 26, 2018
Engine variable camshaft timing phaser with planetary gear set
BORGWARNER INC6 citations70
US6883479B2Apr 26, 2005
VCT phaser having an electromagnetic lock system for shift and lock operation
BORGWARNER INC5 citations62
US6792902B2Sep 21, 2004
Externally mounted DPCS (differential pressure control system) with position sensor control to reduce frictional and magnetic hysteresis
BORGWARNER INC4 citations62
US6779501B2Aug 24, 2004
Method to reduce rotational oscillation of a vane style phaser with a center mounted spool valve
BORGWARNER INC4 citations62