公开(公告)号：US20040011192A1

公开(公告)日：2004-01-22

申请号：US10442990

申请日：2003-05-22

Applicant: C.R.F. SOCIETA CONSORTILE PER AZIONI

Inventor： Salvatore Frediani ,  Marco Margaria

IPC: F16K031/12

CPC classification number: F15B11/006 ,  F15B11/042 ,  F15B11/044 ,  F15B13/0433 ,  F15B2211/20576 ,  F15B2211/30525 ,  F15B2211/30565 ,  F15B2211/30575 ,  F15B2211/3111 ,  F15B2211/3144 ,  F15B2211/31576 ,  F15B2211/31582 ,  F15B2211/329 ,  F15B2211/351 ,  F15B2211/353 ,  F15B2211/6355

Abstract: The circuit comprises first and second power lines connected to a port of a first actuator chamber and to the port of a second actuator chamber, respectively; a supply line and a discharge line connected to a supply source and to a discharge reservoir; a first sliding member valve capable of connecting the first power line to the supply and discharge lines under the control of pilot pressures transmitted to the first sliding member valve by a first pair of pilot lines; and a second sliding member valve capable of connecting the second power line with the supply and discharge lines under the control of pilot pressures transmitted to the second sliding member valve by a second pair of pilot lines. The one line of the first pair of pilot lines and the one line of the second pair of pilot lines transmit the same first pilot pressure signal; the other line of the first pair of pilot lines and the other line of the second pair of pilot lines transmit the same second pilot pressure signal, whereby the actuator can be controlled by only two pilot pressures.

Abstract translation: 电路包括分别连接到第一致动器室的端口和第二致动器室的端口的第一和第二电力线; 连接到供应源和排放储存器的供应管线和排出管线; 第一滑动构件阀，其能够在通过第一对先导管路传递到第一滑动构件阀的先导压力的控制下将第一电力线连接到供排管线; 以及第二滑动构件阀，其能够在由第二对引导管线传递到第二滑动构件阀的先导压力的控制下将第二动力线与供给排出管线连接。 第一对导频线的一条线和第二对导频线的一条线发送相同的第一先导压力信号; 第一对先导管线的另一条线和第二对先导管线的另一条管线传输相同的第二先导压力信号，由此只能通过两个先导压力来控制致动器。