VARIABLE VALVE DEVICE FOR INTERNAL COMBUSTION ENGINE

A variable valve device (20) equipped with a hydraulically actuated variable mechanism (25) that changes the valve timing, and a lock mechanism (26) that locks the valve timing during a prescribed period between the most retarded angle period and the most advanced angle period. The lock mechanism (2...

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Main Authors YOKOYAMA, YUU, FUJIMURA, HARUHITO, ENDO, YOSHIKI
Format Patent
LanguageEnglish
French
Japanese
Published 28.06.2012
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Abstract A variable valve device (20) equipped with a hydraulically actuated variable mechanism (25) that changes the valve timing, and a lock mechanism (26) that locks the valve timing during a prescribed period between the most retarded angle period and the most advanced angle period. The lock mechanism (26) has an advanced angle restriction mechanism and a retarded angle restriction mechanism, and the valve timing is mechanically locked for a prescribed period by means of the cooperation of these mechanisms. The advanced angle restriction mechanism and the retarded angle restriction mechanism each have a release chamber to which operating oil is supplied to control the operations of said mechanisms. The restriction mechanisms are constructed such that the supply/discharge of operating oil for their respective release chambers is controlled by a common OCV (62), and such that the release oil pressure for the advanced angle restriction mechanism and the release oil pressure for the retarded angle restriction mechanism differ. L'invention concerne un dispositif de soupape variable (20) équipé d'un mécanisme variable (25) actionné hydrauliquement qui change le réglage de distribution, et un mécanisme de verrouillage (26) qui verrouille le réglage de distribution durant une période prescrite entre la période d'angle le plus retardé et d'angle le plus avancé. Le mécanisme de verrouillage (26) comprend un mécanisme de limitation d'angle avancé et un mécanisme de limitation d'angle retardé, et le réglage de distribution est mécaniquement verrouillé pour une période prescrite par coopération de ces mécanismes. Le mécanisme de limitation d'angle avancé et le mécanisme de limitation d'angle retardé ont chacun une chambre de libération dans laquelle de l'huile de fonctionnement est alimentée pour commander le fonctionnement de ces mécanismes Les mécanismes de limitation sont construits de manière que l'alimentation/la décharge de l'huile de fonctionnement pour les chambres de libération respectives soit commandée par un OCV commun (62), et de sorte que la libération de la pression d'huile pour le mécanisme de limitation d'angle avancé et pour celui d'angle retardé diffère.
AbstractList A variable valve device (20) equipped with a hydraulically actuated variable mechanism (25) that changes the valve timing, and a lock mechanism (26) that locks the valve timing during a prescribed period between the most retarded angle period and the most advanced angle period. The lock mechanism (26) has an advanced angle restriction mechanism and a retarded angle restriction mechanism, and the valve timing is mechanically locked for a prescribed period by means of the cooperation of these mechanisms. The advanced angle restriction mechanism and the retarded angle restriction mechanism each have a release chamber to which operating oil is supplied to control the operations of said mechanisms. The restriction mechanisms are constructed such that the supply/discharge of operating oil for their respective release chambers is controlled by a common OCV (62), and such that the release oil pressure for the advanced angle restriction mechanism and the release oil pressure for the retarded angle restriction mechanism differ. L'invention concerne un dispositif de soupape variable (20) équipé d'un mécanisme variable (25) actionné hydrauliquement qui change le réglage de distribution, et un mécanisme de verrouillage (26) qui verrouille le réglage de distribution durant une période prescrite entre la période d'angle le plus retardé et d'angle le plus avancé. Le mécanisme de verrouillage (26) comprend un mécanisme de limitation d'angle avancé et un mécanisme de limitation d'angle retardé, et le réglage de distribution est mécaniquement verrouillé pour une période prescrite par coopération de ces mécanismes. Le mécanisme de limitation d'angle avancé et le mécanisme de limitation d'angle retardé ont chacun une chambre de libération dans laquelle de l'huile de fonctionnement est alimentée pour commander le fonctionnement de ces mécanismes Les mécanismes de limitation sont construits de manière que l'alimentation/la décharge de l'huile de fonctionnement pour les chambres de libération respectives soit commandée par un OCV commun (62), et de sorte que la libération de la pression d'huile pour le mécanisme de limitation d'angle avancé et pour celui d'angle retardé diffère.
Author ENDO, YOSHIKI
YOKOYAMA, YUU
FUJIMURA, HARUHITO
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YOKOYAMA, YUU
FUJIMURA, HARUHITO
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Snippet A variable valve device (20) equipped with a hydraulically actuated variable mechanism (25) that changes the valve timing, and a lock mechanism (26) that locks...
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SourceType Open Access Repository
SubjectTerms BLASTING
CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
ENGINE PLANTS IN GENERAL
HEATING
LIGHTING
MACHINES OR ENGINES IN GENERAL
MECHANICAL ENGINEERING
STEAM ENGINES
WEAPONS
Title VARIABLE VALVE DEVICE FOR INTERNAL COMBUSTION ENGINE
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