公开(公告)号：EP2202430B1

公开(公告)日：2012-05-30

申请号：EP08842764.6

申请日：2008-10-07

申请人： Komatsu Ltd.

发明人： NAKAGAWA, Tomohiro ,  YAMAMOTO, Shigeru ,  SHIMADA, Kenjiro

IPC分类号： F16H61/14 ,  E02F9/20 ,  E02F9/22 ,  F16H61/04

CPC分类号： F16H61/143 ,  E02F9/2246 ,  E02F9/2253 ,  E02F9/2296 ,  F16H59/48 ,  F16H61/0437 ,  F16H2061/146 ,  Y10T74/19251 ,  Y10T477/638 ,  Y10T477/755

摘要： Load increase rate computation portion (21) computes a increase rate (²) of a load acting on a work vehicle 1 (Step S102). The transmission control portion (22) shifts a high-speed gear (second speed) down to a low-speed gear (first speed) with producing a lock-up state that a lock-up clutch (4a) is engaged when the load increase rate (²) is less than a load increase rate threshold (²c) in shifting the high-speed gear (second speed) down to the low-speed gear (first speed) (Steps S103, S105). Additionally, the transmission control portion (22) shifts the high-speed gear (second speed) down to the low-speed gear (first speed) with producing a torqcon state that the lock-up clutch (4a) is disengaged when the load increase rate (²) is equal to or greater than the load increase rate threshold (²c) in shifting the high-speed gear (second speed) down to the low-speed gear (first speed) (Steps S103, S104).

公开(公告)号：EP2202399A1

公开(公告)日：2010-06-30

申请号：EP08842404.9

申请日：2008-10-09

申请人： Komatsu Ltd.

发明人： NAKAGAWA, Tomohiro ,  YAMAMOTO, Shigeru ,  SHIMADA, Kenjiro

IPC分类号： F02D29/00 ,  E02F9/20

CPC分类号： E02F9/2066 ,  B60W30/1882 ,  B60W30/1888 ,  B60W2510/0233 ,  B60W2510/0275 ,  B60W2710/0677 ,  B60Y2200/25 ,  B60Y2200/41 ,  B60Y2400/426 ,  E02F9/2246 ,  F02D29/00

摘要： It is an object of the present invention to solve a problem to be caused when a torqcon of a work vehicle is in a nearly/completely stalled state. A storage unit (22) of a controller (20) stores a preliminarily set speed ratio threshold ec. The speed ratio threshold ec is a speed ratio at which a torque ratio t of a torque converter (4) is greater than a torque ratio t1 corresponding to a maximum efficiency η max. Engine output reduction portion (23) of the controller (20) controls an output Pe of an engine (3) to be reduced when a computed speed ratio e is equal to or less than the speed ratio threshold ec.

摘要翻译： 本发明的目的是解决当工作车辆的torqcon处于几乎/完全失速状态时所引起的问题。 控制器（20）的存储单元（22）存储预设速度阈值ec。 变速比阈值ec是变矩器（4）的转矩比t大于与最大效率·最大值相对应的转矩比t1的变速比。 当计算出的速度比e等于或小于速比阈值ec时，控制器（20）的发动机输出减少部分（23）控制发动机（3）的输出Pe减小。

公开(公告)号：EP2202430A1

公开(公告)日：2010-06-30

申请号：EP08842764.6

申请日：2008-10-07

申请人： Komatsu Ltd.

发明人： NAKAGAWA, Tomohiro ,  YAMAMOTO, Shigeru ,  SHIMADA, Kenjiro

IPC分类号： F16H61/14 ,  F16H61/04 ,  F16H59/48

CPC分类号： F16H61/143 ,  E02F9/2246 ,  E02F9/2253 ,  E02F9/2296 ,  F16H59/48 ,  F16H61/0437 ,  F16H2061/146 ,  Y10T74/19251 ,  Y10T477/638 ,  Y10T477/755

摘要： Load increase rate computation portion (21) computes a increase rate (β) of a load acting on a work vehicle 1 (Step S102). The transmission control portion (22) shifts a high-speed gear (second speed) down to a low-speed gear (first speed) with producing a lock-up state that a lock-up clutch (4a) is engaged when the load increase rate (β) is less than a load increase rate threshold (βc) in shifting the high-speed gear (second speed) down to the low-speed gear (first speed) (Steps S103, S105). Additionally, the transmission control portion (22) shifts the high-speed gear (second speed) down to the low-speed gear (first speed) with producing a torqcon state that the lock-up clutch (4a) is disengaged when the load increase rate (β) is equal to or greater than the load increase rate threshold (βc) in shifting the high-speed gear (second speed) down to the low-speed gear (first speed) (Steps S103, S104).

摘要翻译： 负载增加率计算部（21）计算作用在作业车辆1上的负载的增加率（²）（步骤S102）。 变速器控制部22在负载增加时产生锁止离合器（4a）接合的锁止状态，将高速齿轮（第二速度）向下移动到低速档（第一速度） 速度（²）小于将高速档（第二速度）下降到低速档（第一速度）时的负载增加率阈值（²c）（步骤S103，S105）。 此外，变速器控制部22通过产生当负载增加时锁止离合器（4a）脱离的扭矩状态而将高速齿轮（第二速度）向下移动到低速齿轮（第一速度） 速度（²）等于或大于将高速档（第二速度）下降到低速档（第一速度）时的负载增加率阈值（²c）（步骤S103，S104）。

公开(公告)号：EP2037127A1

公开(公告)日：2009-03-18

申请号：EP07740964.7

申请日：2007-04-04

申请人： KOMATSU LTD.

发明人： YAMAMOTO, Shigeru ,  NAKAGAWA, Tomohiro ,  SHINTANI, Satoru

IPC分类号： F15B11/024 ,  E02F9/22

CPC分类号： E02F9/2228 ,  E02F3/844 ,  E02F9/2203 ,  E02F9/2285 ,  E02F9/2292 ,  F15B2211/3127 ,  F15B2211/6346 ,  F15B2211/7053 ,  F15B2211/7107

摘要： A tank 16 and a main hydraulic pump 17 are connected to head side actuator chambers 13 and rod side actuator chambers 14 of hydraulic actuators 12 via conduits 21, 22. A direction control valve 18 and a quick drop valve 36 are connected to the conduits 21, 22. A hydraulic circuit is provided with an electromagnetic switch valve 42, which switches the quick drop valve 36 from a non-quick drop position 37 to a quick drop position 38. When switching the direction control valve 18 from a neutral position 23 to a lowering operation position 25, if the manipulation speed of a manipulation lever 33 exceeds a criteria speed, an excitation signal is output from a control device 32 to an electromagnetic switch valve 42 to quickly drop a blade 11, and the quick drop valve 36 is switched from the non-quick drop position 37 to the quick drop position 38.

摘要翻译： 油箱16和主液压泵17经由导管21,22与液压致动器12的头侧致动器室13和杆侧致动器室14连接。方向控制阀18和快速下降阀36连接到管道21 液压回路设置有电磁切换阀42，其将快速下降阀36从非快速下降位置37切换到快速下降位置38.当将方向控制阀18从中性位置23切换到 降低操作位置25，如果操作杆33的操纵速度超过标准速度，则将激励信号从控制装置32输出到电磁切换阀42，以迅速地降低叶片11，并且快速下降阀36为 从非快速下落位置37切换到快速下落位置38。

公开(公告)号：EP2161425A1

公开(公告)日：2010-03-10

申请号：EP08752955.8

申请日：2008-05-19

申请人： Komatsu Ltd.

发明人： SHINTANI, Satoru ,  YAMAMOTO, Shigeru ,  SUZUKI, Kazuyuki ,  TAKAURA, Takeshi ,  NAKAGAWA, Tomohiro

IPC分类号： F01P7/04 ,  F01P5/04 ,  F02D29/00

CPC分类号： E02F9/2025 ,  F01P7/044 ,  F01P7/08 ,  F02D29/02 ,  F02D29/04

摘要： A work vehicle is provided with an engine, a traveling device, driven by driving force from the engine, that causes the vehicle to travel, a first hydraulic pump driven by the driving force from the engine, that discharges hydraulic oil, and a cooling device driven by the hydraulic oil supplied by the first hydraulic pump, that cools the engine, and a control unit. The control unit performs normal cooling control and cooling suppression control for suppressing operation of the cooling device to be less than the normal cooling control. The control unit performs the cooling suppression control when one of a first mode to fourth mode required to increase the engine speed is performed.

摘要翻译： 作业车辆具备发动机，由来自发动机的驱动力驱动的使车辆行驶的行驶装置，由来自发动机的驱动力驱动的第一液压泵，排出工作油的冷却装置 由第一液压泵供应的液压油驱动，冷却发动机，以及控制单元。 控制单元执行用于将冷却装置的操作抑制为小于正常冷却控制的正常冷却控制和冷却抑制控制。 当执行增加发动机速度所需的第一模式至第四模式中的一个时，控制单元执行冷却抑制控制。