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1. WO2017140351 - A DEVICE FOR CONTROLLING AT LEAST ONE VALVE IN AN INTERNAL COMBUSTION ENGINE

Publication Number WO/2017/140351
Publication Date 24.08.2017
International Application No. PCT/EP2016/053281
International Filing Date 16.02.2016
Chapter 2 Demand Filed 14.12.2017
IPC
F01L 1/053 2006.1
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
02Valve drive
04by means of cams, camshafts, cam discs, eccentrics, or the like
047Camshafts
053overhead type
F01L 1/18 2006.1
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
F01L 1/344 2006.1
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
344changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
F01L 13/00 2006.1
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
F02D 13/02 2006.1
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
CPC
F01L 1/053
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
02Valve drive
04by means of cams, camshafts, cam discs, eccentrics or the like
047Camshafts
053overhead type
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 1/20
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
20Adjusting or compensating clearance
F01L 1/267
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
26characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
267with means for varying the timing or the lift of the valves
F01L 1/3442
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
F01L 13/0047
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
0036the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
0047the movement of the valves resulting from the sum of the simultaneous actions of at least two cams, the cams being independently variable in phase in respect of each other
Applicants
  • VOLVO TRUCK CORPORATION [SE]/[SE]
Inventors
  • PERSSON, Per
Agents
  • VOLVO TECHNOLOGY CORPORATION
Priority Data
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) A DEVICE FOR CONTROLLING AT LEAST ONE VALVE IN AN INTERNAL COMBUSTION ENGINE
(FR) DISPOSITIF PERMETTANT DE COMMANDER AU MOINS UNE SOUPAPE DANS UN MOTEUR À COMBUSTION INTERNE
Abstract
(EN) The invention relates to a device (100') for actuating at least one valve (4) in an internal combustion engine. The device comprises a camshaft arrangement (200') comprising a hollow outer shaft and an inner shaft, which is concentrically mounted inside of the outer shaft to be pivotable relative to the outer shaft. A first cam lobe (206) is mounted on one of the inner shaft and the outer shaft in a rotationally fixed manner and a second cam lobe (208) is mounted on the other of the inner shaft and the outer shaft in a rotationally fixed manner. The device further comprises a rocker arm arrangement (300') comprising a first primary rocker arm (302), which is arranged to follow the first cam lobe (206) and arranged to actuate a first valve (4) when it follows the first cam lobe. The rocker arm arrangement (300') further comprises an auxiliary rocker arm (306), which is arranged to follow the second cam lobe (208). The auxiliary rocker arm is adapted to actuate the first primary rocker arm (302) so that an opening time of the first valve (4) may be extended by the auxiliary rocker arm (306) following the second cam lobe (208).
(FR) L'invention concerne un dispositif (100`) permettant d'actionner au moins une soupape (4) dans un moteur à combustion interne. Le dispositif comprend un agencement d'arbre à cames (200`) comprenant un arbre externe creux et un arbre interne, qui est monté de manière concentrique à l'intérieur de l'arbre externe pour pouvoir pivoter par rapport à l'arbre externe. Un premier bossage de came (206) est monté sur un élément parmi l'arbre interne et l'arbre externe d'une manière fixe en rotation et un second bossage de came (208) est monté sur l'autre élément parmi l'arbre interne et l'arbre externe d'une manière fixe en rotation. Le dispositif comprend en outre un dispositif de culbuteur (300`) comprenant un premier culbuteur primaire (302), qui est disposé pour suivre le premier bossage de came (206) et disposé pour actionner une première soupape (4) lorsqu'elle suit le premier bossage de came. Le dispositif de culbuteur (300`) comprend en outre un culbuteur auxiliaire (306), qui est disposé pour suivre le second bossage de came (208). Le culbuteur auxiliaire est conçu pour actionner le premier culbuteur primaire (302) de sorte qu'une durée d'ouverture de la première soupape (4) peut être prolongée par le culbuteur auxiliaire (306) suivant le second bossage de came (208).
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