专利内容由知识产权出版社提供
专利名称：METHOD AND DEVICE FOR CONTROLLING
PUMP TORQUE FOR HYDRAULICCONSTRUCTION MACHINE
发明人：NAKAMURA, Kazunori,KOWATARI,
Yoichi,ISHIKAWA, Kouji,ARAI, Yasushi
申请号：EP03812682.7申请日：20031118公开号：EP1571339A1公开日：20050907
专利附图：
摘要：A current load rate of an engine 10 is computed and a maximum absorption
torque of at least one hydraulic pump 1, 2 is controlled so that the load rate is held at atarget value. Engine stalling can be prevented by decreasing the maximum absorptiontorque of the hydraulic pump under a high-load condition. When an engine output lowersdue to environmental changes, the use of poor fuel or other reasons, the maximumabsorption torque of the hydraulic pump can be decreased without a lowering of theengine revolution speed. Further, the present invention is adaptable for any kinds offactors causing a lowering of the engine output, such as those factors that cannot bepredicted in advance or are difficult to detect by sensors. In addition, because of nonecessity of sensors, such as environment sensors, the manufacturing cost can bereduced.
申请人：HITACHI CONSTRUCTION MACHINERY CO., LTD.
地址：5-1, Koraku 2-chome Bunkyo-ku, Tokyo 112-0004 JP
国籍：JP
代理机构：Beetz & Partner
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