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1. 发明申请

US20150132166A1 HIGH-PRESSURE PUMP 审中-公开
标题翻译：高压泵
公开(公告)号：US20150132166A1
公开(公告)日：2015-05-14
申请号：US14539329
申请日：2014-11-12
申请人： DENSO CORPORATION
发明人： Hideaki UKAI , Eiji ITOH , Hiroshi INOUE
IPC分类号： F02M37/04 , F02M31/20 , F04B53/08 , F02M37/00
CPC分类号： F04B53/08 , F02M31/20 , F02M37/0052 , F02M59/442 , F02M63/0265 , F04B53/04
摘要： A high-pressure pump includes a plunger, a cylinder, a pressuring chamber, a pump body, a main fuel chamber, an auxiliary fuel chamber and a return passage. The cylinder slidably houses the plunger therein. Fuel is pressurized inside the pressurizing chamber by sliding movement of the plunger. The pump body houses the cylinder and has an end surface on an opposite side of the pump body relative to the pressurizing chamber in an axial direction. The main fuel chamber is disposed inside the pump body into which fuel is supplied. The auxiliary fuel chamber has a side defined by one end of the cylinder on an opposite side of the cylinder relative to the pressurizing chamber. The return passage is disposed inside the pump body and is in fluid communication with an external cooling unit. Fuel leaking out from the pressurizing chamber through a clearance between the cylinder and the plunger is collected inside the auxiliary fuel chamber, and the collected fuel flows toward the external cooling unit through the return passage.
摘要翻译：高压泵包括柱塞，气缸，加压室，泵体，主燃料室，辅助燃料室和回流通道。圆筒可滑动地将柱塞容纳在其中。燃料通过柱塞的滑动运动在加压室内加压。泵体容纳气缸，并且在轴向相对于加压室的相对侧具有端面。主燃料室设置在供给燃料的泵体内。辅助燃料室具有由气缸的一端限定在气缸相对于加压室的相反侧的一侧。返回通道设置在泵体内部并与外部冷却单元流体连通。从加压室通过气缸和柱塞之间的间隙泄漏的燃料被收集在辅助燃料室内部，并且所收集的燃料通过返回通道流向外部冷却单元。

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