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1. 发明申请

WO2010006599A1 CAM DRIVEN EXHAUST VALVE ACTUATION SYSTEM FOR LARGE TWO STROKE DIESEL ENGINE 审中-公开
标题翻译：用于大型两轮柴油发动机的CAM驱动排气阀执行系统
公开(公告)号：WO2010006599A1
公开(公告)日：2010-01-21
申请号：PCT/DK2008/000266
申请日：2008-07-14
申请人： MAN DIESEL FILIAL AF MAN DIESEL SE, TYSKLAND , PEDERSEN, Erik, Due
发明人： PEDERSEN, Erik, Due
IPC分类号： F01L9/02 , F01L1/08 , F02M47/04 , F02M59/10
CPC分类号： F01L9/021 , F01L9/023 , F01L9/025 , F01L2001/34446 , F02M47/04 , F02M59/105
摘要： A large two-stroke diesel engine (1) with an exhaust valve actuating system including a camshaft (28) and hydraulic pushrods that include a piston pump (32) driven by the camshaft coupled via conduit (36) to a hydraulic exhaust valve actuator (34) for moving the exhaust valve (11) concerned. The camshaft is provided with an exhaust cam (29) for each cylinder, and the exhaust cam is profiled with an increased lift (30) exceeding the lift required for opening the exhaust valve. A portion of the additional volume of hydraulic fluid generated by the increased lift of the hydraulic piston pumps is diverted from the hydraulic push rod and delivered to a consumer of pressurized hydraulic fluid that is associated with the engine. The other portion of the additional volume of hydraulic fluid results in additional exhaust valve lift. The energy stored in the air spring (33) urging the exhaust valve to close is returned to the camshaft during the return stroke of the exhaust valve.
摘要翻译：一种具有排气门致动系统的大型二冲程柴油发动机（1），包括凸轮轴（28）和液压推杆，其包括由通过导管（36）联接到液压排气阀致动器（36）的凸轮轴驱动的活塞泵（32） 34），用于移动所述排气阀（11）。凸轮轴设置有用于每个气缸的排气凸轮（29），并且排气凸轮被成型为具有超过打开排气阀所需的升程的提升（30）。通过液压活塞泵的增加的升程产生的附加体积的液压流体的一部分从液压推杆转向并被输送到与发动机相关联的加压液压流体的消耗器。附加体积的液压流体的另一部分导致额外的排气门升程。储存在促使排气阀关闭的空气弹簧（33）中的能量在排气门的返回行程期间返回到凸轮轴。

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