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1. WO2020072862 - VARIABLE LENGTH PISTON ASSEMBLIES FOR ENGINE VALVE ACTUATION SYSTEMS

Publication Number WO/2020/072862
Publication Date 09.04.2020
International Application No. PCT/US2019/054631
International Filing Date 04.10.2019
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
CPC
F01L 1/146
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
14Tappets
146Push-rods
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 1/182
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
182the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
F01L 13/0005
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
0005Deactivating valves
F01L 13/0031
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
0031by modification of tappet or pushrod length
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
Applicants
  • JACOBS VEHICLE SYSTEMS, INC. [US]/[US]
Inventors
  • BALTRUCKI, Justin, D.
  • FERREIRA, David, M.
Agents
  • MORENO, Christopher, P.
Priority Data
16/151,80304.10.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) VARIABLE LENGTH PISTON ASSEMBLIES FOR ENGINE VALVE ACTUATION SYSTEMS
(FR) ENSEMBLES PISTON À LONGUEUR VARIABLE POUR SYSTÈMES D'ACTIONNEMENT DE SOUPAPE DE MOTEUR
Abstract
(EN)
Variable-length assemblies, including lost motion assemblies eliminate hydraulic or pneumatic working fluids for operation in internal combustion engine valve trains and may be integrated into valve rocker arm pivots. An example piston and actuating plate are provided with working surfaces that interact when the actuating plate is rotated relative to the piston. The working surfaces include ramped transition portions and may include upper and lower flat portions. A shallow ramp angle prevents counter-rotation of the actuating plate under load. Actuating assemblies include an actuating solenoid includes a plunger that engages and pivots the actuating arm to cause rotation of the actuating plate relative to the piston and changes the state of the lost motion assembly from an "off state, where motion may be absorbed, to an "on" state where the lost motion assembly is rigid and does not absorb motion.
(FR)
L'invention concerne des ensembles à longueur variable, comprenant des ensembles à mouvement perdu éliminant des fluides actifs hydrauliques ou pneumatiques destinés à fonctionner dans des dispositifs de commande de soupapes de moteur à combustion interne et peuvent être intégrés dans des pivots de culbuteur de soupape. Dans un exemple, un piston et une plaque d'actionnement sont pourvus de surfaces de travail qui interagissent lorsque la plaque d'actionnement est mise en rotation par rapport au piston. Les surfaces de travail comprennent des parties de transition inclinées et peuvent comprendre des parties plates supérieure et inférieure. Un angle de rampe peu profond empêche la contre-rotation de la plaque d'actionnement sous charge. Des ensembles d'actionnement comprennent un solénoïde d'actionnement comprenant un piston qui vient en prise avec le bras d'actionnement et fait pivoter ce dernier afin de provoquer la rotation de la plaque d'actionnement par rapport au piston et modifie l'état de l'ensemble à mouvement perdu depuis un état « arrêt », où le mouvement peut être absorbé, vers un état « marche » où l'ensemble à mouvement perdu est rigide et n'absorbe pas le mouvement.
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