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1. 发明申请

WO2009036572A1 DIRECTLY ACTUATED VALVE WITH A STRAIN-TYPE ACTUATOR AND A METHOD OF OPERATING SAME 审中-公开
标题翻译：具有应变型致动器的直接致动阀及其操作方法
公开(公告)号：WO2009036572A1
公开(公告)日：2009-03-26
申请号：PCT/CA2008/001659
申请日：2008-09-19
申请人： WESTPORT POWER INC. , MUMFORD, David , WELCH, Alan , TOUCHETTE, Alain , HEBBES, Mike , WING, Richard
发明人： MUMFORD, David , WELCH, Alan , TOUCHETTE, Alain , HEBBES, Mike , WING, Richard
IPC分类号： F16K31/72 , F02M51/06 , F16K31/02
CPC分类号： F16K31/004 , F02D41/20 , F02D41/2096 , F02D2041/2037 , F02M51/0603 , F02M61/10 , F02M61/168 , F02M2200/02 , F02M2200/304 , F02M2200/703
摘要： Disclosed is a method of operating a directly actuated valve that comprises a strain-type actuator to actuate a valve member to travel between a closed position and an open position, the method comprising transmitting displacements from the strain-type actuator to the valve member, maintaining a compressive stress on the actuator that is greater than a predetermined minimum stress by applying a pre-load compressive stress and limiting to less than predetermined limits at least one of: (a) acceleration and deceleration of the valve member when moving between open positions and the closed position; and (b) velocity of said valve member immediately before contacting the valve seat. One of the preferred techniques for limiting the velocity of the valve member while also reducing the amount of fluid that flows through the valve during the closing time, comprises changing the closing rate of the valve member so that the valve member travels most of the closing distance quickly during the beginning of a closing movement, and then slowing down the closing rate of the valve member in a second portion of the closing movement, so that the velocity of the valve member is less than a predetermined limit immediately before contacting the valve seat.
摘要翻译：公开了一种操作直接致动阀的方法，其包括应变型致动器以致动阀构件在关闭位置和打开位置之间行进，所述方法包括将位移从应变型致动器传递到阀构件，保持所述致动器上的压缩应力大于预定的最小应力，通过施加预负荷压缩应力并且限制在小于预定限度以下至少之一中：（a）当在打开位置之间移动时所述阀构件的加速和减速;以及关闭位置; 和（b）在接触阀座之前所述阀构件的速度。用于限制阀构件的速度同时减少在关闭时间期间流过阀的流体的量的优选技术之一包括改变阀构件的关闭速率，使得阀构件行进大部分的闭合距离在关闭运动开始时快速地，然后在关闭运动的第二部分中减慢阀构件的关闭速度，使得阀构件的速度小于在接触阀座之前的预定极限。

2. 发明申请

WO2002095212A1 DIRECTLY ACTUATED INJECTION VALVE 审中-公开
标题翻译：直接执行注射阀
公开(公告)号：WO2002095212A1
公开(公告)日：2002-11-28
申请号：PCT/CA2002/000738
申请日：2002-05-17
申请人： WESTPORT RESEARCH INC. , WELCH, Alan , RAHARDJA, Irawan , HEBBES, Michael
发明人： WELCH, Alan , RAHARDJA, Irawan , HEBBES, Michael
IPC分类号： F02M47/02
CPC分类号： F02D41/20 , F02B2275/14 , F02D41/2096 , F02D2041/2037 , F02M21/0254 , F02M21/0269 , F02M51/005 , F02M51/0603 , F02M51/0607 , F02M61/08 , F02M61/10 , F02M61/166 , F02M61/167 , F02M2200/30 , F02M2200/304 , F02M2200/507 , Y02T10/123 , Y02T10/32
摘要： A directly actuated injection valve (100) comprises a hollow valve housing (102), a valve member (114) disposed within the hollow interior, a biasing mechanism (116), an actuator assembly (130) and a hydraulic link assembly (160). The valve member (114) is movable between a closed position and an open position for governing the flow of fuel into the combustion chamber of an internal combustion engine. The biasing mechanism (116), preferably a spring, biases the valve member in the closed position. The actuator assembly (130) generates an opening force that acts against the valve spring (116) to open the valve. The hydraulic link assembly (160) is interposed between the valve member and the valve spring and the actuator assembly. The hydraulic link assembly (160) transmits respective closing and opening forces to the valve member. The hydraulic link preferably comprises a piston disposed within a cylinder that is filled with a hydraulic fluid. The opening and closing forces are transmitted through a thickness of the hydraulic fluid that is trapped between the planar surfaces of the piston and the head and base of the hydraulic cylinder (160).
摘要翻译：直接致动的喷射阀（100）包括中空阀壳体（102），设置在中空内部内的阀构件（114），偏压机构（116），致动器组件（130）和液压连杆组件（160）。阀构件（114）可在关闭位置和打开位置之间移动，用于控制进入内燃机燃烧室的燃料流。偏压机构116优选地是弹簧，将阀构件偏置在关闭位置。致动器组件（130）产生作用于阀弹簧（116）以打开阀的打开力。液压连杆组件（160）插入在阀构件和阀弹簧和致动器组件之间。液压连杆组件（160）将相应的关闭和打开力传递到阀构件。液压连杆优选地包括设置在充满液压流体的气缸内的活塞。打开和关闭力通过被压在活塞的平面表面和液压缸（160）的头部和底座之间的液压流体的厚度传递。

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