公开(公告)号：EP0761491B1

公开(公告)日：2000-06-07

申请号：EP96203233.0

申请日：1992-03-27

申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.

发明人： Hosono, Junichi ,  Kihara, Mitsuo ,  Tatsumi, Akira ,  Tamura, Seiji ,  Asano, Kazuo ,  Ichimura, Kazuhiro ,  Sayama, Hideaki ,  Yoshio, Saburo

IPC分类号： B60K41/16 ,  E02F9/22

CPC分类号： B60W10/06 ,  B60W10/04 ,  B60W10/103 ,  B60W30/18 ,  B60W30/18072 ,  E02F9/2235 ,  E02F9/2246 ,  E02F9/2285 ,  E02F9/2296 ,  F15B2211/20553 ,  F15B2211/253 ,  F15B2211/50536 ,  F16H59/06 ,  F16H59/66 ,  F16H61/4078 ,  F16H61/4148 ,  F16H61/4157 ,  F16H61/431 ,  F16H2059/366 ,  F16H2059/6853 ,  F16H2059/6861

摘要： Whether the running condition or the working condition is discriminated, when the running condition is discriminated, the highest RPM of a prime mover is limited by a 1st RPM, and the maximum displacement value by a 1st volume value, and, when the working condition is discriminated, the highest RPM is limited by a 2nd RPM equal to or lower than the 1st RPM and the maximum displacement volume is limited by the 2nd volume value larger than the 1st volume value. The 1st and 2nd RPM's and the 1st and 2nd volume values are determined to satisfy the relation, (1st RPM x 1st volume value at least at the flat land running pressure)

公开(公告)号：EP0761491A2

公开(公告)日：1997-03-12

申请号：EP96203233.0

申请日：1992-03-27

申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.

发明人： Hosono, Junichi ,  Kihara, Mitsuo ,  Tatsumi, Akira ,  Tamura, Seiji ,  Asano, Kazuo ,  Ichimura, Kazuhiro ,  Sayama, Hideaki ,  Yoshio, Saburo

IPC分类号： B60K41/16

CPC分类号： B60W10/06 ,  B60W10/04 ,  B60W10/103 ,  B60W30/18 ,  B60W30/18072 ,  E02F9/2235 ,  E02F9/2246 ,  E02F9/2285 ,  E02F9/2296 ,  F15B2211/20553 ,  F15B2211/253 ,  F15B2211/50536 ,  F16H59/06 ,  F16H59/66 ,  F16H61/4078 ,  F16H61/4148 ,  F16H61/4157 ,  F16H61/431 ,  F16H2059/366 ,  F16H2059/6853 ,  F16H2059/6861

摘要： A control device for a hydraulically propelled work vehicle according to the present invention comprises an engine revolution speed control means (360) which controls the revolution speed of an engine (21); a variable displacement type hydraulic pump (1) which is driven by the engine (21); a displacement variation means (40) which varies the displacement of this variable displacement hydraulic pump (1); a displacement control means (160A) which determines a target displacement according to the operational state of the pump (1), and drive controls the displacement variation means (40); and, a hydraulic motor (4) for vehicle propulsion which is driven by hydraulic fluid ejected from the variable volume type hydraulic pump (1). There is further provided a slope descending detection means (52) which detects when the vehicle is descending down a slope, and, when it is detected by this detection means that the vehicle is descending down a slope, along with a means for engine revolution speed control (360) lowering the revolution speed of the engine (21), a displacement control means (160A) limits the maximum displacement of the hydraulic pump (1) to a value higher than during vehicle propulsion on level ground at a constant speed.

摘要翻译： 根据本发明的用于液压推进作业车辆的控制装置包括控制发动机（21）的转速的发动机转速控制装置（360）; 由发动机（21）驱动的可变排量型液压泵（1）; 改变该可变排量液压泵（1）的排量的位移变化装置（40）; 位移控制装置，其根据所述泵（1）的操作状态确定目标位移，并且驱动控制所述位移变化装置（40）; 以及由从可变容积型液压泵（1）喷出的液压流体驱动的用于车辆推进的液压马达（4）。 还设置有检测车辆何时下坡的斜坡下降检测装置（52），并且当该检测装置检测到车辆正在下坡时，伴随着发动机转速的装置 控制（360）降低发动机（21）的转速，位移控制装置（160A）将液压泵（1）的最大排量限制在比水平地面上的车辆推进期间以恒定速度高的值。

公开(公告)号：EP0761491A3

公开(公告)日：1997-06-04

申请号：EP96203233.0

申请日：1992-03-27

申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD.

发明人： Hosono, Junichi ,  Kihara, Mitsuo ,  Tatsumi, Akira ,  Tamura, Seiji ,  Asano, Kazuo ,  Ichimura, Kazuhiro ,  Sayama, Hideaki ,  Yoshio, Saburo

IPC分类号： B60K41/16

CPC分类号： B60W10/06 ,  B60W10/04 ,  B60W10/103 ,  B60W30/18 ,  B60W30/18072 ,  E02F9/2235 ,  E02F9/2246 ,  E02F9/2285 ,  E02F9/2296 ,  F15B2211/20553 ,  F15B2211/253 ,  F15B2211/50536 ,  F16H59/06 ,  F16H59/66 ,  F16H61/4078 ,  F16H61/4148 ,  F16H61/4157 ,  F16H61/431 ,  F16H2059/366 ,  F16H2059/6853 ,  F16H2059/6861

摘要： A control device for a hydraulically propelled work vehicle according to the present invention comprises an engine revolution speed control means (360) which controls the revolution speed of an engine (21); a variable displacement type hydraulic pump (1) which is driven by the engine (21); a displacement variation means (40) which varies the displacement of this variable displacement hydraulic pump (1); a displacement control means (160A) which determines a target displacement according to the operational state of the pump (1), and drive controls the displacement variation means (40); and, a hydraulic motor (4) for vehicle propulsion which is driven by hydraulic fluid ejected from the variable volume type hydraulic pump (1). There is further provided a slope descending detection means (52) which detects when the vehicle is descending down a slope, and, when it is detected by this detection means that the vehicle is descending down a slope, along with a means for engine revolution speed control (360) lowering the revolution speed of the engine (21), a displacement control means (160A) limits the maximum displacement of the hydraulic pump (1) to a value higher than during vehicle propulsion on level ground at a constant speed.

摘要翻译： 本发明的液压推进式作业车辆的控制装置具备：控制发动机（21）的转速的发动机转速控制单元（360）; 由发动机（21）驱动的可变容量型液压泵（1）; 使该可变容量型液压泵（1）的容量变化的容量变更单元（40）。 位移控制装置（160A），其根据泵（1）的操作状态确定目标位移，并驱动控制位移变化装置（40）; 和由从可变容量型液压泵（1）喷射的液压流体驱动的用于车辆推进的液压马达（4）。 还设置有斜坡下降检测装置（52），该斜坡下降检测装置检测车辆何时正在下坡，并且当该检测装置检测到车辆正在下坡时，连同用于发动机转速的装置 控制（360）降低发动机（21）的转速时，排量控制装置（160A）将液压泵（1）的最大排量限制在比在平地上以恒定速度推进车辆时更高的值。