公开(公告)号：US08880302B1

公开(公告)日：2014-11-04

申请号：US14127710

申请日：2013-07-26

Applicant: Komatsu Ltd.

Inventor： Tatsuhiko Tachibana ,  Manabu Himoto ,  Daisuke Tsumura

IPC: E02F9/22 ,  E02F9/24 ,  F15B11/10 ,  E02F3/42 ,  F15B21/02 ,  E02F9/26 ,  F15B20/00

CPC classification number: F15B21/02 ,  E02F3/435 ,  E02F9/125 ,  E02F9/226 ,  E02F9/2296 ,  F15B20/00 ,  F15B2211/6355 ,  F15B2211/665 ,  F15B2211/67

Abstract: A lock valve is switched from lock condition to release condition when a lock member is switched from lock position to release position. When pilot pressure is at least a predetermined pressure when the elapsed time from the point at which the lock member is switched from lock position to release position is at least a first predetermined time, the lock valve is maintained in the release condition. When pilot pressure is at least the predetermined pressure, the continuous time duration is greater than the second predetermined time when the elapsed time is less than the first predetermined time, the lock valve is switched to the lock condition. When pilot pressure is at least the predetermined pressure, the continuous time duration is no more than the second predetermined time when the elapsed time is less than the first predetermined time, the lock valve is allowed to be switched.

Abstract translation: 当锁定件从锁定位置切换到释放位置时，锁定阀从锁定状态切换到释放状态。 当从锁定部件从锁定位置切换到释放位置的时间的经过时间至少为第一预定时间时，当先导压力为至少预定压力时，锁定阀保持在释放状态。 当先导压力至少为预定压力时，当经过时间小于第一预定时间时，连续持续时间大于第二预定时间，则锁定阀切换到锁定状态。 当先导压力至少为预定压力时，当经过时间小于第一预定时间时，连续持续时间不超过第二预定时间，允许锁定阀被切换。