VARIABLE VALVE GEAR FOR INTERNAL COMBUSTION ENGINE
PROBLEM TO BE SOLVED: To hold at an intermediate operating angle during engine stop in preparation for the next start of the engine. SOLUTION: In a first variable valve mechanism continuously executing variable control of an operating angle, the operating angle is determined by changing a rotating p...
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| creator | NISHIZAWA SHUICHI YAMANAKA HIROTAKA MIURA TAKAHIRO |
| description | PROBLEM TO BE SOLVED: To hold at an intermediate operating angle during engine stop in preparation for the next start of the engine. SOLUTION: In a first variable valve mechanism continuously executing variable control of an operating angle, the operating angle is determined by changing a rotating position of a control shaft 32 by a hydraulic actuator 33. The actuator 33 includes a cylindrical cylinder 51 and a piston 54 connected to a rod 55. The position of the piston 54 is controlled by supply of hydraulic pressure to first and second hydraulic chambers 52, 53. The piston is apt to move to a small operating angle side due to valve lift reaction. A stopper pin 61 for biasing a stopper plate 67 in a protruding manner is provided as an intermediate stopper mechanism 60 at the end of the small operating angle side. The stopper pin 61 is projected by a coil spring when the hydraulic pressure drops during the engine stop so as to restrict the movement of the piston 54 so that the lift and the operating angle must not be the minimum. COPYRIGHT: (C)2009,JPO&INPIT |
| format | Patent |
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SOLUTION: In a first variable valve mechanism continuously executing variable control of an operating angle, the operating angle is determined by changing a rotating position of a control shaft 32 by a hydraulic actuator 33. The actuator 33 includes a cylindrical cylinder 51 and a piston 54 connected to a rod 55. The position of the piston 54 is controlled by supply of hydraulic pressure to first and second hydraulic chambers 52, 53. The piston is apt to move to a small operating angle side due to valve lift reaction. A stopper pin 61 for biasing a stopper plate 67 in a protruding manner is provided as an intermediate stopper mechanism 60 at the end of the small operating angle side. The stopper pin 61 is projected by a coil spring when the hydraulic pressure drops during the engine stop so as to restrict the movement of the piston 54 so that the lift and the operating angle must not be the minimum. 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SOLUTION: In a first variable valve mechanism continuously executing variable control of an operating angle, the operating angle is determined by changing a rotating position of a control shaft 32 by a hydraulic actuator 33. The actuator 33 includes a cylindrical cylinder 51 and a piston 54 connected to a rod 55. The position of the piston 54 is controlled by supply of hydraulic pressure to first and second hydraulic chambers 52, 53. The piston is apt to move to a small operating angle side due to valve lift reaction. A stopper pin 61 for biasing a stopper plate 67 in a protruding manner is provided as an intermediate stopper mechanism 60 at the end of the small operating angle side. The stopper pin 61 is projected by a coil spring when the hydraulic pressure drops during the engine stop so as to restrict the movement of the piston 54 so that the lift and the operating angle must not be the minimum. 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SOLUTION: In a first variable valve mechanism continuously executing variable control of an operating angle, the operating angle is determined by changing a rotating position of a control shaft 32 by a hydraulic actuator 33. The actuator 33 includes a cylindrical cylinder 51 and a piston 54 connected to a rod 55. The position of the piston 54 is controlled by supply of hydraulic pressure to first and second hydraulic chambers 52, 53. The piston is apt to move to a small operating angle side due to valve lift reaction. A stopper pin 61 for biasing a stopper plate 67 in a protruding manner is provided as an intermediate stopper mechanism 60 at the end of the small operating angle side. The stopper pin 61 is projected by a coil spring when the hydraulic pressure drops during the engine stop so as to restrict the movement of the piston 54 so that the lift and the operating angle must not be the minimum. COPYRIGHT: (C)2009,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ENGINE PLANTS IN GENERAL GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE WEAPONS |
| title | VARIABLE VALVE GEAR FOR INTERNAL COMBUSTION ENGINE |
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