摘要:
A travel control device is provided with hydraulic pumps 31 and 41 of a variable capacity type that are driven by an engine EG; hydraulic motors 32 and 42 that are driven by discharged oil from the hydraulic pumps; traveling devices 5 that are rotation-driven by the hydraulic motors; a travel operation lever 52 that is operated so as to instruct a traveling operation; a first control valve 62 for generating a charged hydraulic pressure by adjusting the discharged oil from a charge pump 61 and a second control valve 65 for generating a capacity control hydraulic pressure in accordance with the operation of the travel operation lever. The first control valve is designed to pressure-adjust and generate a charged hydraulic pressure in accordance with the rotation speed of the engine, and the hydraulic pump is subjected to a variable capacity control process by a capacity control hydraulic pressure that is pressure-adjusted and generated by the second control valve.
摘要:
The invention relates to a vehicle hydraulic assistance method comprising: two hydraulic devices connected therebetween by a supply line, a return line, a power boost source, and a tank, the power boost source being connected to the supply line and return line via a power boost line and taking the oil from the tank; and a vacuum valve including an input port, connected to the supply line and return line, and an output port connected to the tank. The vacuum valve has a first passing state and a second blocking state. The method includes the steps of: (E1) activating the power boost source when the vehicle fulfills at least one predetermined requirement, the vacuum valve being in the first passing state; and (E2) switching the vacuum valve from the first passing state to the second blocking state when hydraulic assistance is required, thus making it possible to boost power to the supply system and return system.
摘要:
The invention relates to a system comprising: a driving hydraulic device (1) having retractable radial pistons; a driven hydraulic device (2) having retractable radial pistons, the discharge (12) of the driving hydraulic device (1) being connected to the admission (21) of the driven hydraulic appliance by a supply line (4), and the discharge (22) of the driven hydraulic device (2) being connected to the admission (11) of the driving hydraulic device (1) by a return line (5); and a primary motor (M). The invention is characterised in that said system also comprises a charging source (3) suitable for being selectively engaged, said charging source being connected to the admission line (4) and to the discharge line (5) via a charging line, and selectively either to a tank (R), or only to the admission (11) of the driving hydraulic device (1), via an engagement line provided with a control (7).
摘要:
Die Erfindung betrifft ein Verfahren zum Betrieb eines Hydrauliksystems eines selbstfahrenden Straßenfertigers, insbesondere zur bedarfsgerechten Einspeisung von Hydrauliköl in einen geschlossenen hydraulischen Kreislauf des Straßenfertigers, ein Hydrauliksystem eines Straßenfertigers zur Durchführung des Verfahrens sowie einen Straßenfertiger mit einem solchen Hydrauliksystem. Dabei erfolgt die Entnahme und/oder Rückführung der Menge an Hydrauliköl in Abhängigkeit von mindestens einem Betriebsparameter des Straßenfertigers.
摘要:
Offenbart ist eine Hydraulikanordnung, die einen hydraulischen Kreislauf mit einer Druckmittelquelle und einer Druckmittelsenke aufweist, die über zwei Druckleitungen miteinander verbunden sind. Über ein Spülventil ist zumindest eine Druckleitung mit einem Tank verbindbar. Das Spülventil weist hierfür in einer Schaltrichtung zumindest zwei Schaltstellungen mit einem unterschiedlichen Öffnungsquerschnitt auf.