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公开(公告)号：US4917139A
公开(公告)日：1990-04-17
申请号：US368812
申请日：1989-06-20
申请人： Tadataka Narumi , Ryutaro Abe , Susumu Honaga , Yoshiyuki Toyama
发明人： Tadataka Narumi , Ryutaro Abe , Susumu Honaga , Yoshiyuki Toyama
CPC分类号： B62D5/06 , B62D5/061 , Y10T137/2562 , Y10T137/2579
摘要： There is disclosed a flow control apparatus for a power steering device in which an operating fluid discharged from a pump is delivered to a power steering device through a restricted passage, and the fluid flow is adjusted by a spool valve movable in response to the pressure difference across the restricted passage. The spool valve contains a first relief valve operating at a first setting pressure in response to the fluid pressure transmitted from a passage located at the downstream side of the restricted passage through a connecting passage. The spool valve also contains a second relief valve operating at a second setting pressure higher than the first setting pressure, but lower than a allowable maximum load pressure, in response to the fluid pressure directly transmitted from a chamber located at the upstream side of the restricted passage. During operations under normal temperature conditions, the first relief valve operates when the load pressure reaches the first setting pressure. Under low temperature conditions, the second relief valve first operates at the second setting pressure, and then the first relief valve operates in order to reduce the fluid pressure to the first setting pressure. With this operation, the fluid pressure delivered to the power steering device is maintained not to exceed the maximum load pressure even under low temperature condition.
摘要翻译： 公开了一种用于动力转向装置的流量控制装置，其中从泵排出的工作流体通过限制通道被输送到动力转向装置，并且流体流量由可根据压力差移动的滑阀调节 跨限制通道 滑阀包含响应于从限制通道的下游侧的通道通过连接通道传递的流体压力而在第一设定压力下操作的第一安全阀。 滑阀还包含第二安全阀，其操作在高于第一设定压力的第二设定压力下，但是响应于从位于受限制的上游侧的室直接传递的流体压力而低于允许的最大负载压力 通道。 在常温条件下运行时，当负载压力达到第一设定压力时，第一安全阀工作。 在低温条件下，第二安全阀首先在第二设定压力下操作，然后第一安全阀工作，以将流体压力降低到第一设定压力。 通过该操作，即使在低温条件下，输送到动力转向装置的流体压力也不会超过最大负载压力。
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公开(公告)号：US4396033A
公开(公告)日：1983-08-02
申请号：US182580
申请日：1980-08-29
申请人： Tadataka Narumi , Akihiko Sato , Satoshi Suto
发明人： Tadataka Narumi , Akihiko Sato , Satoshi Suto
CPC分类号： B62D6/02 , Y10T137/2589 , Y10T137/2594 , Y10T137/2597
摘要： A flow volume control device for a power assisted steering device having a main control valve device, whose main valve spool is movable to establish the communication of an inlet passage with a bypass passage when the flow rate of pressurized fluid supplied from an engine-driven pump to the steering device through the inlet passage and first and second throttle passages disposed in parallel relation exceeds a predetermined value. For safe driving at a high speed, an auxiliary control valve device is further provided, whose auxiliary valve spool is moved to close the second throttle passage when high-speed driving causes pressurized fluid from the pump to increase in volume, to thereby bring about a predetermined pressure drop across said inlet passage.
摘要翻译： 一种用于动力辅助转向装置的流量控制装置，其具有主控制阀装置，当从发动机驱动泵供给的加压流体的流量时，主阀芯可移动以建立入口通道与旁通通道的连通 通过入口通道到转向装置，并且以平行关系设置的第一和第二节流通道超过预定值。 为了高速的安全驾驶，进一步设置辅助控制阀装置，当高速行驶导致来自泵的加压流体增加体积时，辅助阀芯被移动以关闭第二节流通道，从而产生一个 穿过所述入口通道的预定压降。
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公开(公告)号：US4311161A
公开(公告)日：1982-01-19
申请号：US179429
申请日：1980-08-19
申请人： Tadataka Narumi , Akihiko Sato
发明人： Tadataka Narumi , Akihiko Sato
CPC分类号： F04C14/26 , B62D6/02 , Y10T137/2584 , Y10T137/2594
摘要： A valve system in a power steering system is disclosed. It includes a spool valve which is slidably located in a valve bore for by-passing an excess fluid at high vehicular speed in response to the pressure differential across an orifice. A control rod is slidably located in the spool valve and has at the end a metering portion for maintaining a limited flow volume when the spool valve is moved to close a by-pass port with the increase of a working pressure in the power steering system.
摘要翻译： 公开了一种动力转向系统中的阀系统。 它包括滑阀，其可滑动地位于阀孔中，用于响应于穿过孔的压差而以高车速绕过多余的流体。 控制杆可滑动地位于滑阀中，并且在端部具有计量部分，用于在滑阀移动时随着动力转向系统中工作压力的增加而关闭旁路口而保持有限的流量。
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