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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2018/117626
Kind Code:
According to an embodiment of the present invention, a construction machine comprises: one or more hydraulic pumps for discharging working fluid; an engine for supplying rotating power to the hydraulic pumps; a hydraulic line in which the working fluid discharged by the hydraulic pumps flows; a main control valve provided on the hydraulic line and controlling the supply of the working fluid to a traveling device or one or more among various working devices, which need the working fluid; a bypass cut valve provided on the hydraulic line at the lower side thereof than the main control valve so as to open and close the hydraulic line; an automatic warm-up switch for generating a warm-up operation signal for increasing the temperature of the working fluid before an operation starts; and a control device for performing, when the warm-up operation signal is transmitted from the automatic warm-up switch, a warm-up operation for increasing the number of revolution of the engine and opening the bypass cut valve so as to increase the flow rate of the fluid moving along the hydraulic line.

KIM, Tae Yoon (101-1205, 5 Yeongsin-ro 57-gil,Yeongdeungpo-gu, Seoul, 07221, KR)
Application Number:
Publication Date:
June 28, 2018
Filing Date:
December 20, 2017
Export Citation:
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DOOSAN INFRACORE CO., LTD. (489Injung-ro, Dong-gu, Incheon, 22502, KR)
International Classes:
E02F9/22; F15B21/04
Foreign References:
Attorney, Agent or Firm:
YOON, Yu Kwang et al. (We The People IP & Law, 6th Fl Chinyang Bldg., 47, Kyonggidae-ro,,Seodaemun-gu, Seoul, 03752, KR)
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