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2. 发明授权

US5749563A Exhaust gas recirculation system 失效
标题翻译：废气再循环系统
公开(公告)号：US5749563A
公开(公告)日：1998-05-12
申请号：US785897
申请日：1997-01-21
申请人： Yuji Hosaka , Yasuhiro Makibayashi , Tomoyuki Kumagai , Tatsuaki Nakanishi
发明人： Yuji Hosaka , Yasuhiro Makibayashi , Tomoyuki Kumagai , Tatsuaki Nakanishi
IPC分类号： F02M25/07 , F16K31/122 , F16K31/126
CPC分类号： F02M26/55 , F02M26/67 , F02M26/68 , Y10T137/4259
摘要： The invention relates to an exhaust gas recirculation system as may be used in an engine of an automobile or the like. A housing is provided with an exhaust gas recirculation passage, which may be opened or closed by a valve connected to a diaphragm. The valve includes a rod which is guided by a guide bushing for movement back and forth. A securing protective cover mounted on the housing and a cup-shaped movable protective cover mounted on the diaphragm prevent ingress of a foreign matter between the guide bushing and the valve. An air passage is formed in the movable protective cover. With this construction, the provision of the air passage prevents a negative pressure from prevailing in the movable protective cover, thus preventing a foreign matter such as water or dust which may be deposited on the housing or the like from being drawn into a clearance between the guide bushing and the valve.
摘要翻译：本发明涉及可用于汽车等的发动机中的排气再循环系统。壳体设置有排气再循环通道，废气再循环通道可以通过连接到隔膜的阀打开或关闭。该阀包括由导向衬套引导的杆，用于前后运动。安装在壳体上的固定保护盖和安装在隔膜上的杯形可移动保护盖防止引导衬套和阀之间的异物进入。空气通道形成在可动保护罩中。利用这种结构，空气通道的设置可防止活动保护盖中产生负压，从而防止可能沉积在壳体等上的诸如水或灰尘的异物被吸入到导套和阀。

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