公开(公告)号：EP1666734A1

公开(公告)日：2006-06-07

申请号：EP04772708.6

申请日：2004-08-27

申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.

发明人： Kowatari, Y., Hitachi Constr. Machinery Co., Ltd. ,  Arai, Y., Hitachi Constr. Machinery Co., Ltd. ,  Ishikawa, K., Hitachi Constr. Machinery Co., Ltd. ,  Nakamura, K., Hitachi Constr. Machinery Co., Ltd. ,  Ariga, N., Hitachi Constr. Machinery Co., Ltd. ,  Karasawa, H., Hitachi Constr. Machinery Co., Ltd. ,  Gotou, Y., Hitachi Constr. Machinery Co., Ltd. ,  Yabuuchi, M., Hitachi Constr. Machinery Co., Ltd.

IPC分类号： F15B11/00

CPC分类号： F04B49/08 ,  E02F9/2246 ,  E02F9/2285 ,  E02F9/2296 ,  F04B17/05 ,  F15B2211/20553 ,  F15B2211/633 ,  F15B2211/6346 ,  F15B2211/6652 ,  F15B2211/851

摘要： To control small an engine lag down subsequent to a lapse of a predetermined holding time during which a low pump torque is supposed to be held upon operation of a control device from a non-operated state, an engine lag down control system for construction machinery is provided with a machinery body controller 13 having a first torque control means and a second torque control means, a solenoid valve 16 and the like, and a third torque control means. The first torque control means controls a torque control valve 7 to a minimum pump torque (value: Min) corresponding to a target number of engine revolutions Nr when a non-operated state of a control device 5 has continued beyond a monitoring time TX1. The second torque control means controls the torque control valve 7 such that the above-described minimum pump torque is held for a predetermined holding time TX2 subsequent to the operation of the control device 5 from the non-operated state. The third torque control means controls the torque control valve 7 such that from a time point of a lapse of the predetermined holding time TX2, the pump torque is gradually increased on a basis of a predetermined torque increment rate K as time goes on.

摘要翻译： 为了控制在从非操作状态操作控制装置时假定保持低泵转矩的预定保持时间过去之后的发动机发动机滞后，用于工程机械的发动机滞后控制系统是 设置有具有第一转矩控制装置和第二转矩控制装置，电磁阀16等的机械主体控制器13和第三转矩控制装置。 当控制装置5的非操作状态持续超过监视时间TX1时，第一转矩控制装置将转矩控制阀7控制为对应于目标发动机转数Nr的最小泵转矩（值：Min）。 第二转矩控制装置控制转矩控制阀7，使得在控制装置5从非操作状态操作之后，将上述最小泵转矩保持预定的保持时间TX2。 第三转矩控制装置控制转矩控制阀7，使得从经过预定保持时间TX2的时间点起，随着时间的推移，基于预定的转矩增量率K逐渐增加泵转矩。

公开(公告)号：EP1666734B1

公开(公告)日：2012-05-02

申请号：EP04772708.6

申请日：2004-08-27

申请人： Hitachi Construction Machinery Co., Ltd.

发明人： Kowatari, Y., Hitachi Constr. Machinery Co., Ltd. ,  Arai, Y., Hitachi Constr. Machinery Co., Ltd. ,  Ishikawa, K., Hitachi Constr. Machinery Co., Ltd. ,  Nakamura, K., Hitachi Constr. Machinery Co., Ltd. ,  Ariga, N., Hitachi Constr. Machinery Co., Ltd. ,  Karasawa, H., Hitachi Constr. Machinery Co., Ltd. ,  Gotou, Y., Hitachi Constr. Machinery Co., Ltd. ,  Yabuuchi, M., Hitachi Constr. Machinery Co., Ltd.

IPC分类号： F15B11/00

CPC分类号： F04B49/08 ,  E02F9/2246 ,  E02F9/2285 ,  E02F9/2296 ,  F04B17/05 ,  F15B2211/20553 ,  F15B2211/633 ,  F15B2211/6346 ,  F15B2211/6652 ,  F15B2211/851

摘要： An engine lag down suppressing device of construction machinery, comprising a vehicle body controller (13) having a first torque control means and a second torque control means, and a third torque control means. The first torque control means controls a torque control valve (7) to the minimum pump torque (value: Min) according to a target engine rotational speed (Nr) when the operating device (5) in the non-operated state of an continues for a monitoring time (TX1) to suppress an engine lag down after a specified holing time to hold a torque to a low pump torque is passed when the operating device in the non-operated state is operated. The second torque control means controls the torque control valve (7) to hold the minimum pump torque for a specified holding time (TX2) after the operating device (5) in the non-operated state is operated. The third torque control means comprises a solenoid valve (16) and controls the torque control valve (7) to gradually increase the pump torque with elapse of time from a time when the specified holding time (TX2) is passed based on a specified torque increasing rate (K).