公开(公告)号：US06625981B2

公开(公告)日：2003-09-30

申请号：US10050100

申请日：2002-01-18

申请人： Junichi Ikeda ,  Hiromi Ando ,  Atsuya Koshu

发明人： Junichi Ikeda ,  Hiromi Ando ,  Atsuya Koshu

IPC分类号： F16D3102

CPC分类号： F02M35/10229 ,  B60T13/52 ,  F02M35/10

摘要： There is disclosed a pneumatic booster having a vacuum chamber connected to an intake pipe of an engine. An air outlet of an ejector is connected to the intake pipe through a vacuum control valve, and an air inlet of the ejector is connected to an air cleaner. A vacuum pick-up port of the ejector is connected to the vacuum chamber of a booster body. The vacuum control valve comprises a control chamber and a control piston, and the negative pressure in the booster is introduced into the control chamber and acts on the control piston. When the negative pressure in the booster is insufficient, the control piston acts to open the control valve and a negative pressure is supplied from the ejector to the vacuum chamber. When the negative pressure in the booster is sufficiently high, the control piston acts to close the control valve and stops the operation of the ejector, thus reducing an effect of the ejector with respect to an air/fuel ratio of the engine.

公开(公告)号：US06269732B1

公开(公告)日：2001-08-07

申请号：US09418510

申请日：1999-10-15

申请人： Hiromi Ando ,  Mitsuhiro Endo ,  Atsuya Koshu

发明人： Hiromi Ando ,  Mitsuhiro Endo ,  Atsuya Koshu

IPC分类号： F15B910

CPC分类号： B60T13/57

摘要： A pneumatic booster includes a valve mechanism for introducing atmospheric air into a variable-pressure chamber in accordance with the movement of a plunger, propelling a power piston due to differential pressure generated between the variable-pressure chamber and a constant-pressure chamber and transmitting force by which the power piston is propelled through a valve body to an output shaft. The valve mechanism includes a poppet valve mechanism including a seal surface capable of abutting against an annular atmospheric valve seat formed in the plunger and a seal surface capable of abutting against an annular negative pressure valve seat formed on an inner surface of the valve body. The annular atmospheric valve seat of the plunger is located in a position forward in a direction of propelling of the power piston relative to the negative pressure valve seat and is substantially aligned with the negative pressure valve seat in an axial direction. The poppet valve mechanism has a main poppet valve including the seal surface capable of abutting against the negative pressure valve seat and a sub poppet valve including the seal surface capable of abutting against the atmospheric valve seat. The seal surface of the sub poppet valve is spaced apart in the axial direction from the seal surface of the main poppet valve.

摘要翻译： 气动助力器包括一个阀机构，用于根据柱塞的运动将大气引入可变压力室，由于可变压力室和恒压室之间产生的差压而推动动力活塞，并且传递力 动力活塞通过阀体推动到输出轴。 阀机构包括提升阀机构，该提升阀机构包括能够抵靠形成在柱塞中的环形大气阀座的密封表面和能够抵靠形成在阀体内表面上的环形负压阀座的密封表面。 柱塞的环形大气阀座位于动力活塞相对于负压阀座的推进方向上的前方位置，并且在轴向方向上基本上与负压阀座对准。 提升阀机构具有主提升阀，其包括能够抵靠负压阀座的密封面和包括能够抵靠大气阀座的密封面的副提升阀。 副提升阀的密封面在与主提升阀的密封面的轴向隔开。

公开(公告)号：US5884548A

公开(公告)日：1999-03-23

申请号：US831143

申请日：1997-04-01

申请人： Hiromi Ando ,  Kiyoshi Shirahata ,  Mitsuhiro Endo ,  Atsuya Koshu

发明人： Hiromi Ando ,  Kiyoshi Shirahata ,  Mitsuhiro Endo ,  Atsuya Koshu

IPC分类号： B60T8/32 ,  B60T13/563 ,  F15B9/10

CPC分类号： B60T13/563 ,  B60T8/3275

摘要： A brake booster includes a housing, a partition adapted to divide the interior of the housing into two chambers, and two diaphragms adapted to divide the two chambers into constant and variable pressure chambers. A control valve includes a valve body carried by the diaphragms, and a plunger slidably received in the valve body. The control valve is operatively connected to the variable pressure chambers to develop a pressure differential across the diaphragms to cause the diaphragms to move in response to actuation of an input rod. A reaction disk is disposed between an output rod and the valve body to transmit the reaction of movement of the output rod to the input rod. An adjusting mechanism is disposed between the plunger and the reaction disk and compressible so as to develop a greater degree of pressure differential when a force applied by the input rod exceeds a predetermined level. The reaction disk is caused to make contact with the contact disk and held out of contact with the spring and the plunger when the plunger is actuated.

摘要翻译： 制动助力器包括壳体，适于将壳体的内部分成两个腔室的隔板以及适于将两个腔室分成恒定和可变压力腔室的两个隔膜。 控制阀包括由隔膜承载的阀体和可滑动地容纳在阀体中的柱塞。 控制阀可操作地连接到可变压力室，以跨越隔膜形成压力差，以响应于输入杆的致动而使隔膜移动。 反作用盘设置在输出杆和阀体之间，以将输出杆的运动反应传递到输入杆。 调节机构设置在柱塞和反作用盘之间并且可压缩，以便当由输入杆施加的力超过预定水平时产生更大程度的压力差。 当活塞被致动时，使反作用盘与接触盘接触并与弹簧和柱塞保持不接触。

公开(公告)号：US06796772B2

公开(公告)日：2004-09-28

申请号：US10187802

申请日：2002-07-03

申请人： Junichi Ikeda ,  Atsuya Koshu ,  Jun Watanabe

发明人： Junichi Ikeda ,  Atsuya Koshu ,  Jun Watanabe

IPC分类号： F04F544

CPC分类号： F04F5/52 ,  F04F5/20 ,  F04F5/44 ,  F04F5/467 ,  F04F5/54

摘要： An ejector can obtain a sufficiently large suction air quantity without reducing the ultimate vacuum. A diffuser is disposed downstream of a nozzle to form a single Laval nozzle. A suction port is provided between the nozzle and the diffuser. The inlet of the diffuser is enlarged in width so that the side walls thereof extend approximately parallel to each other along the axis of the diffuser over a predetermined length. When air is caused to flow from an inlet closer to the nozzle toward an outlet by the engine intake negative pressure, the flow velocity at a throat portion reaches the sound velocity owing to the effect of the Laval nozzle. Consequently, a high negative pressure is generated at the suction port. The parallel portion formed by enlarging the inlet of the diffuser allows the suction air quantity to be increased without reducing the effect of the Laval nozzle.

摘要翻译： 喷射器可以获得足够大的吸入空气量而不降低极限真空度。 扩散器设置在喷嘴的下游以形成单个拉瓦尔喷嘴。 在喷嘴和扩散器之间设有吸入口。 扩散器的入口的宽度被扩大，使得其侧壁沿着扩散器的轴线在预定长度上彼此大致平行地延伸。 当通过发动机进气负压使空气从更靠近喷嘴的入口流向出口时，由于拉瓦尔喷嘴的作用，喉部处的流速达到声速。 因此，在吸入口处产生高的负压。 通过扩大扩散器的入口而形成的平行部分允许增加吸入空气量而不降低拉伐尔喷嘴的效果。