| 摘要 |
A hydraulic circuit (32), for example, remotely controls a work element (14) and contains first apparatus (34), such as a master cylinder (42), which passes a fluid signal through a first or second fluid pathway (38, 40) in response to an input signal. Second apparatus (36), such as a slave cylinder (44), delivers an output signal in response to the fluid signal for controlling the work element (14). In such a circuit, temperature variation can cause fluid volume changes which disrupt synchronized operation of, for example, the master and slave cylinders (42, 44). Third apparatus (74) positions the fluid pathways (38, 40) in fluid communication with a tank (28) in the absence of the fluid signal. If the signal passes through one pathway (38, 40), that pathway (38, 40) is blocked from the tank (28) and the other pathway (40, 38) is positioned in communication with the tank (28). Thus, a fluid pathway (38, 40) not pressurized for transmitting a fluid signal receives oil volume compensation for substantially overcoming problems of temperature changes. |
