Exhaust valve lifting cam, turbocharged four-cycle engine

    公开(公告)号:JP5107296B2

    公开(公告)日:2012-12-26

    申请号:JP2009094263

    申请日:2009-04-08

    Abstract: Providing a cam for lifting and lowering the exhaust valve so that the exhaust gas return-flow from one cylinder to another cylinder can be realized as greatly as possible, wherein the pistons and the exhaust valves do not come in contact with each other, and the valve control method does not depend on an electronic control approach. An exhaust cam for lifting and lowering the valve lift of the exhaust valve of one of the cylinders wherein the cam profile of the exhaust cam regarding the one of the cylinders including, but not limited to: a main exhaust lobe part for opening the exhaust valve so that the exhaust gas is discharged out of the cylinder; and, a gas return lobe part for opening the exhaust valve so that the quantity of the exhaust gas from the one of cylinders to the other cylinder is increased, the gas return lobe part being formed on the cam-follower descending part of the profile so as to delay the closing timing of the exhaust valve or maintain the valve lift-displacement regarding the exhaust valve larger, and wherein the cam profile is formed so that the interference between the exhaust valve and the piston is avoided and the overlap regarding the exhaust valve of the one cylinder and the exhaust valve of the other cylinder is increased by the manner that the main exhaust lobe part and the gas return lobe part rise outward from the base circle.

    Cam for lifting/lowering exhaust valve, four-cycle engine equipped with supercharger, and method for controlling valve timing
    89.
    发明专利
    Cam for lifting/lowering exhaust valve, four-cycle engine equipped with supercharger, and method for controlling valve timing 有权
    用于提升/降低排气阀的CAM,具有超级电容器的四个循环发动机以及用于控制阀定时的方法

    公开(公告)号:JP2010242678A

    公开(公告)日:2010-10-28

    申请号:JP2009094263

    申请日:2009-04-08

    Abstract: PROBLEM TO BE SOLVED: To provide a cam for lifting/lowering an exhaust valve and the like recirculating the larger amount of exhaust gas from the other cylinder to one cylinder without depending on electronic control without bringing a piston into contact with the exhaust valve. SOLUTION: In this method for controlling the valve timing of the exhaust valve, exhaust gas exhausted from the exhaust port of the other cylinder is recirculated into the one cylinder through the exhaust port of the one cylinder. An exhaust valve pressing cam 4 for the one cylinder is so formed that an exhaust main lift part 4a for exhausting the exhaust gas from the inside of the cylinder and a recirculation lift part 4b formed on a down side in the rotating direction of the exhaust valve pressing cam 4 in order to increase the amount of exhaust gas recirculated led to flow from the other cylinder into the exhaust port of the one cylinder and delaying a valve lift closing timing or maintaining high lift are raised from a base circle R so that the amount of overlap with the exhaust valve of the other cylinder is increased while avoiding contact of the exhaust valve with the piston. COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 要解决的问题:提供一种用于提升/降低排气门等的凸轮,其将来自另一个气缸的更大量的废气再循环到一个气缸而不依赖于电子控制而不使活塞与排气接触 阀。 解决方案:在这种用于控制排气门的气门正时的方法中,从另一个气缸的排气口排出的废气通过一个气缸的排气口再循环到一个气缸中。 用于一个气缸的排气门按压凸轮4形成为用于从气缸内部排出废气的排气主提升部4a和形成在排气门的旋转方向的下侧的再循环提升部4b 为了增加从另一个气缸流入一个气缸的排气口并延迟气门关闭正时或保持高升程的循环再循环的排气量从基圆R升高, 与另一个气缸的排气阀的重叠增加,同时避免排气阀与活塞接触。 版权所有(C)2011,JPO&INPIT

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