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JP2005009422A Capacity control mechanism for variable displacement compressor 审中-公开
标题翻译：可变位移压缩机的容量控制机制
公开(公告)号：JP2005009422A
公开(公告)日：2005-01-13
申请号：JP2003175448
申请日：2003-06-19
申请人： Toyota Industries Corp , 株式会社豊田自動織機
发明人： OTA MASAKI , YOSHIDA HIROYUKI , IIDA SHIYUUSHIN , HONJO TOSHITAKA
IPC分类号： F04B49/00 , F04B27/14 , F04B27/18
CPC分类号： F04B27/1804 , F04B2027/1813 , F04B2027/1827 , F04B2027/1831 , F04B2027/1872
摘要： PROBLEM TO BE SOLVED: To provide a variable displacement mechanism capable of preventing a second control valve from improperly operating even in lowering of performance of a first control valve while preventing lowering of efficiency of a variable displacement compressor. SOLUTION: The first control valve CV1 controls an opening of an air supply passage 29. In the second control valve CV2 composed of a spool valve, pressure in a downstream side of the first control valve CV1 in the air supply passage 29 is introduced to a back pressure chamber 78 through a valve inner passage 82. The second control valve CV2 opens and closes a first air bleed passage 27 with first valve parts 76a, 76b as the pressure acting on a back face 80 of a spool 76 is changed in accordance with the valve opening of the first control valve CV1. A second valve part 86 is provided on the back face 80 of the spool 76 to close the opening 82a in the back pressure chamber 78 of the valve inner passage 82 when the first valve parts 76a, 76b open the first air bleed passage 27 to the maximum opening in accordance with the closing of the air supply passage 29 by the first control valve CV1. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种即使在降低第一控制阀的性能同时防止可变排量压缩机的效率降低的同时也能够防止第二控制阀不正常工作的可变排量机构。解决方案：第一控制阀CV1控制供气通道29的开口。在由滑阀构成的第二控制阀CV2中，供气通道29中的第一控制阀CV1的下游侧的压力为通过阀内通道82引导到背压室78.当作用在阀芯76的背面80上的压力改变时，第二控制阀CV2打开和关闭具有第一阀部件76a，76b的第一排气通道27 根据第一控制阀CV1的阀门开度。当第一阀部件76a，76b将第一排气通道27打开时，第二阀部件86设置在阀芯76的背面80上，以封闭阀内通道82的背压室78中的开口82a 根据第一控制阀CV1关闭供气通道29的最大开度。版权所有（C）2005，JPO＆NCIPI

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