BRINKER, JARRET LEE,HUGHES, JEFFREY SCOTT,MEIER, JOSEPH SHAWN
申请号：
CA3083640
公开号：
CA3083640A1
申请日:
2018.11.05
申请国别(地区):
CA
年份:
2019
代理人:
摘要：
A tillage implement (10) has a frame (12) with a center section (14) and first and second outer wing sections (16) hingedly attached the center section (14) such that the wing sections (16) can be operably raised and lowered between a field-working position and a transport position. The sections (14) each carry tillage tools (40) for working the soil. Controlling a precharge in a secondary side (82) of the hydraulic circuit (60, 74) enables the operator of the implement (10) to adjust the downward pressure precharge provided by a plurality of hydraulic cylinders (72A, 72B) based on a desired stiffness of the implement (10). A pressure reducing valve (80) is used to command flow from the hydraulic supply (76) and put downward pressure precharge on the plurality of tillage tools (40). Once this desired precharge has been achieved, flow from the hydraulic supply (76) is shut off and the blocking valve (90) holds the pressure such that the plurality of hydraulic cylinders (72A, 72B) holds the tillage tools (40) in position.
