Hydraulic control system for internal combustion e

专利名称：Hydraulic control system for internal

combustion engine

发明人：Hisahara, Keiji,Ichikawa, Toshiro,Suga,

Seiji,Fujita, Osamu,Sawada, Takanori

申请号：EP06022344.3申请日：20061025公开号：EP1780383A1公开日：20070502

专利附图：

摘要：A hydraulic control system for an internal combustion engine, includes a drivenmechanism driven by hydraulic pressure fed through a flowing passage change-over

valve. The flowing passage change-over valve includes a valve body formed with aplurality of ports which are respectively communicated with the supply passage and theoil passage, and a spool valve body slidably disposed in the valve body to open and closethe plurality of ports, the ports including a supplying port communicated with thesupplying passage. The maximum cross-sectional area of the supplying port is larger thana minimum cross-sectional area of the supplying passage. The flowing passage change-over valve is supplied with electric current to heat hydraulic fluid kept in the flowingpassage change-over valve so as to lower a viscosity of the hydraulic fluid.

申请人：Hitachi, Ltd.

地址：6-6, Marunouchi 1-chome Chiyoda-ku Tokyo 100-8280 JP

国籍：JP

代理机构：Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät

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