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1. WO2013014491 - VALVE ACTUATION MECHANISM AND AUTOMOTIVE VEHICLE COMPRISING SUCH A VALVE ACTUATION MECHANISM

Publication Number WO/2013/014491
Publication Date 31.01.2013
International Application No. PCT/IB2011/002487
International Filing Date 22.07.2011
IPC
F01L 13/00 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
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
F01L 13/08 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
08for decompression, e.g. during starting; for changing compression ratio
CPC
F01L 1/181
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
12Transmitting gear between valve drive and valve
18Rocking arms or levers
181Centre pivot rocking arms
F01L 1/34
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
F01L 13/0021
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
0015for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
0021by modification of rocker arm ratio
F01L 13/06
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
F01L 13/08
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
08for decompression, e.g. during starting; for changing compression ratio
Applicants
  • RENAULT TRUCKS [FR]/[FR] (AllExceptUS)
  • LE FORESTIER, Romain [FR]/[FR] (UsOnly)
Inventors
  • LE FORESTIER, Romain
Agents
  • PUTET, Gilles
Priority Data
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) VALVE ACTUATION MECHANISM AND AUTOMOTIVE VEHICLE COMPRISING SUCH A VALVE ACTUATION MECHANISM
(FR) MÉCANISME D'ACTIONNEMENT DE SOUPAPE ET VÉHICULE AUTOMOBILE COMPRENANT UN TEL MÉCANISME D'ACTIONNEMENT DE SOUPAPE
Abstract
(EN)
The invention proposes a valve actuation mechanism (S) for an internal combustion engine (E) on an automotive vehicle, comprising rockers (9) moved by a camshaft (2), each rocker (9) being adapted to exert a valve opening force (F9) on at least a portion of a opening actuator (7) of each cylinder, via an activation piston (95) of the rocker (9) movable with respect to the rocker (9) under action of a fluid pressure raise in a chamber (101), from a first position to a second position, in which a cam follower (93) of the rocker (9) is adapted to read at least one auxiliary valve lift sector of a cam (22) of the camshaft (2) so as to perform an engine operating function, each rocker (9) comprising a valve (97; 99; 103; 106) for releasing fluid from the chamber (101), wherein the valve actuation mechanism (S) comprises, for each rocker (9), a stopper (13) fast with a housing (E1) of the engine (E) and adapted to exert, on a member (978; 991; 95) of the rocker (9), a variable force (F136) for opening the fluid releasing valve (97; 99; 103; 105).
(FR)
L'invention porte sur un mécanisme d'actionnement de soupape (S) pour un moteur à combustion interne (E) monté sur un véhicule automobile, qui comprend des culbuteurs (9) entraînés par un arbre à cames (2), chaque culbuteur (9) étant apte à exercer une force d'ouverture de soupape (F9) sur au moins une partie d'un actionneur d'ouverture (7) de chaque cylindre, par l'intermédiaire d'un piston d'activation (95) du culbuteur (9) qui peut se déplacer par rapport au culbuteur (9) sous l'action d'une élévation d'une pression de fluide dans une chambre (101), pour passer d'une première position à une seconde position dans laquelle un galet suiveur (93) du culbuteur (9) est adapté pour lire au moins un secteur auxiliaire de levée de soupape d'une came (22) de l'arbre à cames (22) de manière à exécuter une fonction de commande du moteur, chaque culbuteur (9) comprenant une soupape (97 ; 99 ; 103 ; 106) destinée à relâcher du fluide de la chambre (101), le mécanisme d'actionnement de soupape (S) comprenant, pour chaque culbuteur (9), un arrêt (13) solidaire d'un carter (E1) du moteur (E) et étant apte à exercer, sur un élément (978 ; 991 ; 95) du culbuteur (9), une force variable (F136) pour l'ouverture de la soupape de relâchement de fluide (97 ; 99 ; 103 ; 105).
Also published as
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