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Title:
PRIME MOVER CONTROL DEVICE OF WORK VEHICLE
Document Type and Number:
Japanese Patent JP2007071135
Kind Code:
A
Abstract:

To reduce noise and improve fuel consumption when an operator gets off a vehicle in a travel mode.

A prime-mover control device comprises hydraulic pumps 2, 11 driven by a prime mover 1, working and traveling hydraulic actuators 5, 12 driven by pressure oil from the hydraulic pumps 2, 11, mode discrimination means 31, 32 for discriminating between the travel mode in which the vehicle is in a state possible to travel and a work mode in which the vehicle is in a state impossible to travel, idle rotation speed set means 40-43 for setting idle rotation speed of the prime mover 1 at a first idle rotation speed NL1 when the work mode is discriminated by the mode discrimination means and for setting the idle rotation speed of the prime mover 1 at a second idle rotation speed NL2 higher than the first idle rotation speed NL1 when the travel mode is discriminated, getting-off detection means 35, 36 for detecting getting-off of the operator, and an idle rotation speed reduction means 39 for setting the idle rotation speed of the prime mover 1 to be lower than the second idle rotation speed NL2 when the getting-off is detected by the getting-off detection means in the travel mode.


Inventors:
Ichimura, Kazuhiro
Application Number:
JP2005000260271
Publication Date:
March 22, 2007
Filing Date:
September 08, 2005
Export Citation:
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Assignee:
HITACHI CONSTR MACH CO LTD
International Classes:
F02D29/02; B60T7/12; E02F9/20; F02D41/08
Attorney, Agent or Firm:
永井 冬紀



 
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