Title:
走行式油圧作業機
Document Type and Number:
Japanese Patent JP4484467
Kind Code:
B2
Abstract:
A traveling hydraulic working machine comprising at least one prime mover (1), a machine body (101) for mounting said prime mover thereon, traveling means (3) mounted on said machine body and including a torque converter (31) coupled to said prime mover, a hydraulic pump (12) driven by said prime mover, at least one working actuator (13-16) operated by a hydraulic fluid supplied from said hydraulic pump, and an operating device (23-26) for generating an operation signal to control said working actuator, said traveling hydraulic working machine further comprising an input means (42) for commanding a target revolution speed of said prime mover (1); a first detection means (47) for detecting an operating situation of said working actuator (13-16); a second detection means (45, 46) for detecting an operating situation of said traveling means (3); and a prime-mover revolution speed control means (52-59) for modifying the target revolution speed of said prime mover based on the operating situation of said working actuator detected by said first detection means and the operating situation of said traveling means detected by said second detection means, and controlling the revolution speed of said prime mover, wherein said prime-mover revolution speed control means includes means (52-54, 56, 59) for modifying the target revolution speed of said prime mover (1) to reduce when the operating situation of said traveling means (3) is in a state close to a stall of said torque converter and the operating situation of said working actuator (13-16) comes into a light load state or when the operating situation of said traveling means (3) is in a state far from a stall of said torque converter and the operating situation of said working actuator (13-16) comes into a heavy load state.
Inventors:
Tsuyoshi Nakamura
Genroku Sugiyama
Kazunori Nakamura
Hiratahigashi
Genroku Sugiyama
Kazunori Nakamura
Hiratahigashi
Application Number:
JP2003285144A
Publication Date:
June 16, 2010
Filing Date:
August 01, 2003
Export Citation:
Assignee:
Hitachi Construction Machinery Co., Ltd.
International Classes:
F02D29/00; E02F9/20; E02F9/22; F02D29/02; F02D31/00; F02D41/02; F04B49/06; F15B11/00
Domestic Patent References:
| JP5295760A | ||||
| JP2078743A | ||||
| JP8246911A | ||||
| JP64075724A | ||||
| JP8151658A |
Attorney, Agent or Firm:
Kasuga Toshiaki