Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
ENGINE CONTROL DEVICE FOR CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2004/113704
Kind Code:
A1
Abstract:
An engine control device for a construction machine has pressure sensors (73, 74), position sensors (75, 76), pressure sensors (77, 78), a target revolution speed correction value- calculating portion (90), and a correction value-adding portion (70r). A target revolution speed (NR2) for control is calculated such that an engine speed increases from a target revolution speed (NR1), from an input portion (71), based on a change in a state quantity and then gradually returns to the target revolution speed (NR1), a target fuel injection amount (FN1) is calculated based on a target revolution speed (NR2) for control, and a fuel injection amount is regulated. The structure above enables the reduction of an engine speed in rapid increase in an engine load to be reduced without sacrificing operation, and lowering of durability caused by overspeeding of the engine to be prevented.

Inventors:
Nakamura, Kazunori (5-22, Kandatsuchuo 3-chome Tsuchiura-shi, Ibaraki, 300-0011, JP)
Arai, Yasushi (18-25, Kandatsuhigashi 2-chome Tsuchiura-shi, Ibaraki, 300-0012, JP)
Kowatari, Yoichi (2573, Shishikura Kasumigaura-mach, Niihari-gun Ibaraki, 300-0121, JP)
Ishikawa, Kouji (1779-5, Shimoinayoshi Chiyodamach, Niihari-gun Ibaraki, 315-0052, JP)
Karasawa, Hideo (Shiho-ryo, 20-29 Kandatsuchuo 2-chom, Tsuchiura-shi Ibaraki, 300-0011, JP)
Application Number:
PCT/JP2004/009279
Publication Date:
December 29, 2004
Filing Date:
June 24, 2004
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HITACHI CONSTRUCTION MACHINERY CO., LTD. (5-1 Koraku 2-chome, Bunkyo-ku, Tokyo, 112-0004, JP)
Nakamura, Kazunori (5-22, Kandatsuchuo 3-chome Tsuchiura-shi, Ibaraki, 300-0011, JP)
Arai, Yasushi (18-25, Kandatsuhigashi 2-chome Tsuchiura-shi, Ibaraki, 300-0012, JP)
Kowatari, Yoichi (2573, Shishikura Kasumigaura-mach, Niihari-gun Ibaraki, 300-0121, JP)
Ishikawa, Kouji (1779-5, Shimoinayoshi Chiyodamach, Niihari-gun Ibaraki, 315-0052, JP)
Karasawa, Hideo (Shiho-ryo, 20-29 Kandatsuchuo 2-chom, Tsuchiura-shi Ibaraki, 300-0011, JP)
International Classes:
E02F9/22; F02D29/00; F02D29/04; F02D31/00; F02D41/04; F02D41/14; F02D45/00; F15B11/00; F02D41/12; (IPC1-7): F02D41/04; F02D41/14
Foreign References:
JP4001183B22007-10-31
JP3414159B22003-06-09
Other References:
See also references of EP 1637718A1
Attorney, Agent or Firm:
Kasuga, Yuzuru (7th Fl, Kyodo Bldg.-Shinkodenmacho 1-3, Nihonbashi-Kodenmach, Chuo-ku Tokyo, 103-0001, JP)
Download PDF: