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1. WO2007142724 - SYSYEM FOR EXHAUST VALVE ACTUATION

Publication Number WO/2007/142724
Publication Date 13.12.2007
International Application No. PCT/US2007/008016
International Filing Date 30.03.2007
IPC
F01L 9/02 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
9Valve-gear or valve arrangements actuated non-mechanically
02by fluid means, e.g. hydraulic
F01L 13/06 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
13Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
06for braking
F02D 13/04 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
13Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
02during engine operation
04using engine as brake
F02D 13/02 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
13Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
02during engine operation
F02D 41/02 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
02Circuit arrangements for generating control signals
CPC
F01L 13/065
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
13Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
06for braking
065Compression release engine retarders of the "Jacobs Manufacturing" type
F01L 2001/34446
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
1Valve-gear or valve arrangements, e.g. lift-valve gear
34characterised by the provision of means for changing the timing of the valves without changing the duration of opening ; and without affecting the magnitude of the valve lift
344changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
3442using hydraulic chambers with variable volume to transmit the rotating force
34423Details relating to the hydraulic feeding circuit
34446Fluid accumulators for the feeding circuit
F01L 9/025
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
9Valve-gear or valve arrangements actuated non-mechanically
02by fluid means, e.g. hydraulic
021the action of a cam being transmitted to a valve by a fluid column, e.g. a fluid conduit
023Hydraulic lifters, i.e. fluid chamber comprised between a piston actuated by a cam and a piston acting on a valve stem
025the volume of the chamber being variable, e.g. for varying the lift or the timing of a valve
F02D 13/0246
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
13Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
02during engine operation
0242Variable control of the exhaust valves only
0246changing valve lift or valve lift and timing
F02D 13/04
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
13Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
02during engine operation
04using engine as brake
F02D 2041/001
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
41Electrical control of supply of combustible mixture or its constituents
0002Controlling intake air
001for engines with variable valve actuation
Applicants
  • CATERPILLAR INC. [US]/[US] (AllExceptUS)
  • CORNELL, Sean, O. [US]/[US] (UsOnly)
  • MCCLURE, Thomas, R. [US]/[US] (UsOnly)
  • PIPIS, John, S. Jr. [US]/[US] (UsOnly)
Inventors
  • CORNELL, Sean, O.
  • MCCLURE, Thomas, R.
  • PIPIS, John, S. Jr.
Agents
  • CARTER, Janda, M.
Priority Data
11/443,05731.05.2006US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SYSYEM FOR EXHAUST VALVE ACTUATION
(FR) SYSTÈME D'ACTIONNEMENT D'UNE SOUPAPE D'ÉCHAPPEMENT
Abstract
(EN)
A variable valve actuation system (72) is disclosed for providing exhaust to at least one component downstream of an engine (12). The system includes an exhaust valve (66) disposed in an engine cylinder and a hydraulic actuation system (98). The system also includes a braking control valve (84), a supply of hydraulic fluid (86) operably connected to the hydraulic actuation system, and an exhaust valve actuating device (114) operably connected to the hydraulic actuation system. The exhaust valve actuating device is operable to affect the exhaust valve to open within the engine cylinder. The system further includes a device (154) for controlling a position of the exhaust valve actuating device relative to a position of the exhaust valve. The controlling device is operably connected to the supply of hydraulic fluid.
(FR)
L'invention concerne un système d'actionnement (72) d'une soupape d'échappement pour fournir un échappement à au moins un composant en aval d'un moteur (12). Le système comprend une soupape d'échappement (66) disposée dans un cylindre du moteur et un système d'actionnement hydraulique (98). Le système comprend aussi une vanne (84) de commande de freinage, une alimentation (86) en fluide hydraulique, reliée pour son fonctionnement au système d'actionnement hydraulique, et un dispositif d'actionnement (114) de la soupape d'échappement, relié pour son fonctionnement au système d'actionnement hydraulique. On peut faire fonctionner le dispositif d'actionnement de la soupape d'échappement pour faire s'ouvrir la soupape d'échappement dans le cylindre du moteur. Le système comprend en outre un dispositif (154) pour commander la position du dispositif d'actionnement de la soupape d'échappement par rapport à la position de la soupape d'échappement. Ledit dispositif de commande est relié pour son fonctionnement à l'alimentation en fluide hydraulique.
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