公开(公告)号：US10392781B2

公开(公告)日：2019-08-27

申请号：US16288941

申请日：2019-02-28

申请人： KCM Corporation

发明人： Kohtaroh Uno ,  Shoroku Kawahara ,  Keigo Kikuchi ,  Koji Hyodo ,  Atsushi Shimazu

IPC分类号： E02F9/22 ,  F02D29/04 ,  E02F9/20 ,  E02F3/43 ,  E02F3/28 ,  F16H61/468 ,  E02F9/02 ,  E02F9/08

摘要： To improve working efficiency in an eco mode when a power mode and the eco mode have been set in a wheel loader, the wheel loader is provided with a controller having an eco mode characteristic line, a power mode characteristic line, and a lifting operation characteristic line having a matching point C located between a matching point A between a working device operating engine torque characteristic line and the eco mode characteristic line and a matching point B between the working device operating engine torque characteristic line and the power mode characteristic line. The controller includes a control portion, which controls a HST pump in accordance with the lifting operation characteristic line when lifting operation of a lift arm is detected while the eco mode has been selected by a work mode selecting portion.

公开(公告)号：US09458758B2

公开(公告)日：2016-10-04

申请号：US14358324

申请日：2012-11-15

申请人： KCM Corporation

发明人： Koji Hyodo ,  Atsushi Shimazu ,  Isamu Aoki ,  Tetsuji Tanaka ,  Keigo Kikuchi

IPC分类号： F16D31/02 ,  F01P7/02 ,  F16H61/4165 ,  F16H61/4043 ,  F01P7/04 ,  F16H61/4061 ,  F01P5/04 ,  E02F9/22 ,  B60K25/02

CPC分类号： F01P7/02 ,  B60K2025/026 ,  E02F9/226 ,  F01P5/043 ,  F01P7/044 ,  F16H61/4043 ,  F16H61/4061 ,  F16H61/4165

摘要： A cooling fan control unit, in response to an operation performed at the rotation direction selector switch to select a reverse rotation setting while the cooling fan is rotating forward, lowers a relief pressure setting at the variable relief valve to a predetermined lower limit value over a predetermined length of time, and once the discharge pressure at the hydraulic pump detected by the pressure sensor is lowered to a predetermined switch-over pressure, executes control so as to switch the direction of flow of pressure oil to the hydraulic motor to the reverse direction by switching the direction switching valve and raises the relief pressure setting at the variable relief valve to a reverse rotation pressure setting, at which the hydraulic motor rotates in the reverse direction, over a predetermined length of time.

摘要翻译： 一种冷却风扇控制单元，响应于在所述旋转方向选择开关处进行的操作以在所述冷却风扇向前旋转时选择反向旋转设定，将所述可变溢流阀上的溢流压力设定值降低到预定的下限值 预定的时间长度，一旦由压力传感器检测到的液压泵的排出压力下降到预定的切换压力，则执行控制，以将压力油的流向朝向液压马达的相反方向 通过切换方向切换阀，将可变溢流阀的溢流压力设定提高到液压马达反方向旋转预定时间长度的反转压力设定值。