公开(公告)号：US20150098783A1

公开(公告)日：2015-04-09

申请号：US14504678

申请日：2014-10-02

申请人： Hitachi Construction Machinery Co., Ltd. ,  Kabushiki Kaisha KCM

发明人： Koji HYODO ,  Takashi TAKEYAMA ,  Tetsuji TANAKA ,  Isamu AOKI ,  Katsutaka HARA ,  Tatsuo OOUCHI

IPC分类号： E02F9/22 ,  E02F9/08 ,  E02F3/28 ,  F01N11/00 ,  F02D41/02

CPC分类号： E02F9/2246 ,  E02F3/283 ,  E02F9/0883 ,  E02F9/2235 ,  E02F9/226 ,  E02F9/2296 ,  F01N3/208 ,  F01N11/00 ,  F01N2550/05 ,  F01N2590/08 ,  F01N2900/0412 ,  F01N2900/08 ,  F01N2900/1814 ,  F02D31/001 ,  F02D41/021 ,  F02D41/0235 ,  F02D2200/101 ,  F02D2250/18 ,  F02D2250/26 ,  F02D2250/36 ,  Y02A50/2325 ,  Y02T10/24

摘要： A work vehicle including a front work device, contains: a variable displacement hydraulic pump that is driven by an engine and supplies pressure oil to an actuator that drives the front work device; an exhaust gas purification device that purifies nitrogen oxide in exhaust gas discharged from the engine using a reducing agent solution stored in a reducing agent tank; a remaining amount detection device that detects a remaining amount of the reducing agent solution in the reducing agent tank; and a control unit that decreases output torque of the engine and also decreases a rotational speed of the engine in a rated point according to decrease of the remaining amount of the reducing agent solution detected by the remaining amount detection device.

摘要翻译： 一种包括前工作装置的工作车辆，包括：可变排量液压泵，其由发动机驱动，并将压力油供给到驱动前作业装置的致动器; 使用存储在还原剂槽中的还原剂溶液净化从发动机排出的废气中的氮氧化物的废气净化装置; 剩余量检测装置，其检测还原剂槽中的还原剂溶液的剩余量; 以及控制单元，其减小发动机的输出转矩并且还根据由剩余量检测装置检测到的还原剂溶液的剩余量的减少而在额定点降低发动机的转速。