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1. 发明申请

WO1992013144A1 HYDRAULIC CONTROL SYSTEM IN HYDRAULIC CONSTRUCTION MACHINE 审中-公开
标题翻译：液压施工机械液压控制系统
公开(公告)号：WO1992013144A1
公开(公告)日：1992-08-06
申请号：PCT/JP1992000075
申请日：1992-01-28
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , TATSUMI, Akira , TAMURA, Seiji , KIHARA, Mitsuo , ICHIMURA, Kazuhiro , ONOUE, Hiroshi , NAKAMURA, Shigetaka
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： E02F03/43
CPC分类号： E02F9/2228 , E02F9/2235 , E02F9/2242 , E02F9/2246 , E02F9/2285 , E02F9/2292 , E02F9/2296 , F02B3/06 , F16H61/472
摘要： A displacement of a variable capacity hydraulic pump (1) driven by a prime mover (27) is controlled to a first target displacement for holding a pump pressure at a value higher than a load pressure by a predetermined target value or to a second target displacement for restricting an input torque in accordance with the pump pressure. There is provided a restricting means (65) for outputting a third target displacement larger than the minimum value of the first target displacement in place of the first target displacement, and, when the third target displacement is output from the restricting means (65), the pump displacement is controlled to the third target displacement.

2. 发明申请

WO1992007145A1 SYSTEM FOR CONTROLLING NUMBER OF ROTATIONS OF PRIME MOVER IN HYDRAULICALLY DRIVEN VEHICLE 审中-公开
标题翻译：用于控制液压驱动车辆中主动轮转动次数的系统
公开(公告)号：WO1992007145A1
公开(公告)日：1992-04-30
申请号：PCT/JP1990001333
申请日：1990-10-16
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , TATSUMI, Akira , KIHARA, Mitsuo , TAMURA, Seiji , SAYAMA, Hideaki , YOSHIO, Saburou , ASANO, Kazuo , HOSONO, Junichi
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： E02F03/43
CPC分类号： E02F9/2246 , F02D29/04
摘要： The following number of rotations control means (33) controls the number of rotations of a prime mover in a hydraulically driven vehicle, comprising: a hydraulic pump (1) for discharging pressure oil at a flow rate commensurate to the number of rotations of a prime mover (21); a hydraulic motor (4) driven by oil discharged from the hydraulic pump (1) during running; a working actuator (52) driven by oil discharged from the hydraulic pump (1) during working; and a running pedal (6a) for controlling the running speed in accordance with an operation level during running. When the working time is detected, the number of rotations of the prime mover is controlled commensurate to the operation level of the running pedal and in accordance with the characteristics of the number of rotations of the prime mover, which is suitable for the working time. When the working time is not detected, the number of rotations of the prime mover (21) is controlled commensurate to the operation level of the running pedal and in accordance with the characteristics of the number of rotations of the prime mover, which is suitable for the running.
摘要翻译：以下转数控制装置（33）控制液压驱动车辆中的原动机的转数，包括：液压泵（1），用于以与第一转速的转速相当的流量排出压力油移动者（21）; 在运行期间由从液压泵（1）排出的油驱动的液压马达（4）在工作期间由从液压泵（1）排出的油驱动的工作致动器（52）和行驶踏板（6a），用于根据运行中的操作水平来控制行驶速度。当检测到工作时间时，原动机的转数相应于行驶踏板的操作水平，并且根据适合于工作时间的原动机的转数的特性来控制。当未检测到工作时间时，原动机（21）的转数相应于行驶踏板的操作水平，并根据原动机的转数特性，适合跑步。

3. 发明申请

WO1992014046A1 SYSTEM FOR CONTROLLING REVOLUTION FREQUENCY OF PRIME MOVER IN HYDRAULICALLY DRIVEN VEHICLE 审中-公开
标题翻译：用于控制液压驱动车辆中原动机的转速的控制系统
公开(公告)号：WO1992014046A1
公开(公告)日：1992-08-20
申请号：PCT/JP1992000115
申请日：1992-02-05
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , ICHIMURA, Kazuhiro , TAMURA, Seiji , TATSUMI, Akira , KIHARA, Mitsuo , HOSONO, Junichi , ASANO, Kazuo
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： F02D29/04
CPC分类号： B60W10/06 , B60W10/04 , B60W10/103 , B60W30/18 , B60W2540/106 , B60W2710/0644 , E02F9/2246 , E02F9/2285 , F02B41/00 , F02D29/04 , F16H61/4061
摘要： The system comprises a hydraulic pump (1) driven by an engine (21); a hydraulic motor (4) for running, driven by oil discharged from the hydraulic pump (1) during running; an actuator (52) for working, driven by oil discharged from the hydraulic pump (1) during working; a running pedal (6) for controlling a running speed in accordance with a manipulated variable during running; a reduced speed determining means (33) for determining the reduced depression of the running pedal (6); and a revolution frequency controller (33). The revolution frequency controller (33) performs a regular control for increasingly or decreasingly controlling the revolution frequency of the engine in accordance with the depth of the depression of the running pedal (6), and slow-down control for decreasingly controlling the revolution frequency of the engine to match the reduced depth of the depression when the depth of the depression is determined to be reduced. Then, when the revolution frequency of the engine is to be adjusted by the running pedal (6) during working, even if the depth of the depression of the running pedal (6) is reduced, the slow-down control is prohibited.
摘要翻译：该系统包括由发动机（21）驱动的液压泵（1）; 液压马达（4），用于在行驶期间从所述液压泵（1）排出的油驱动; 用于在加工期间由从液压泵（1）排出的油驱动的用于工作的致动器（52）运行踏板（6），用于在行驶期间根据操纵变量控制行驶速度; 用于确定所述行驶踏板（6）的下降的减速判定装置（33）; 和转速控制器（33）。转速控制器33根据行驶踏板（6）的下压深度，逐渐或者逐渐地控制发动机的转速进行规则控制，并且减速控制用于逐渐控制转速当确定凹陷的深度被确定为减小时，发动机匹配凹陷的减小的深度。然后，即使在行驶踏板（6）的运转踏板（6）的运转踏板（6）的发动机的转速被调整的情况下，即使行驶踏板（6）的下压深度减小，也禁止减速控制。

4. 发明申请

WO1992017654A1 CONTROL SYSTEM IN HYDRAULICALLY RUN WORKING MACHINE 审中-公开
标题翻译：液压运行机械控制系统
公开(公告)号：WO1992017654A1
公开(公告)日：1992-10-15
申请号：PCT/JP1992000381
申请日：1992-03-27
申请人： HITACHI CONSTRUCTION MACHINERY CO., LTD. , HOSONO, Junichi , TAMURA, Seiji , SAYAMA, Hideaki , KIHARA, Mitsuo , ASANO, Kazuo , YOSHIO, Saburo , TATSUMI, Akira , ICHIMURA, Kazuhiro
发明人： HITACHI CONSTRUCTION MACHINERY CO., LTD.
IPC分类号： E02F09/22
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)

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