摘要:
The present invention relates to a dual pump system which is capable of bypassing a portion of oil, when the oil supplied to an engine excessively increases in supply pressure, to always maintain an adequate oil supply pressure at each portion of the engine. The dual pump system according to the present invention includes: a dual pump provided with a plurality of chambers independent from each other, wherein an input and an output port are provided in each of the chambers; a plurality of output lines connected to the output ports of the plurality of chambers, respectively; and a switching valve that is provided in an output line of one side of the plurality of output lines, enables a fluid to flow to the output line when operating in one direction, and enables the fluid to be drained to an oil pan through a bypass line branched from the output line when operating in the other direction.
摘要:
A fluid pump of the present invention includes a housing (H), a rotary shaft (30), and pump units (70, 80) which are contained in the housing and sucks in , pressurizes, and discharges fluid with being rotationally driven by the rotary shaft. The housing has a suction passage (14b) conducting the fluid from a suction port (14a) to the pump unit, a discharge passage (15a) conducting the fluid from the pump unit to a discharge port (15b) , a return passage (16c) returning a portion of the fluid flowing through the discharge passage to an upstream side of the pump unit, and a control valve (90) controlling a flow of the returned fluid. The return passage (16c) is formed so as to conduct the returned fluid in the same direction as a flow of a sucked fluid flowing through the suction passage (14b) to make the returned fluid flow together with the sucked fluid. As a result, pump efficiency can be improved while preventing a disorder of the flow, flow loss and the like.
摘要:
The invention concerns a hydraulic control arrangement for an automatic transmission, the hydraulic control arrangement for an automatic transmission comprising at least one valve arrangement (1), the valve arrangement (1) comprising a switching valve (10), comprising a switching member (11), and a check valve (20), the switching valve (10) being disposed in a housing (30) and being hydraulically connected to first pressure-setting arrangement (HCU) and to a second pressure-setting arrangement (EDS) and to a switching element (K) for transmitting torque, the switching valve (10) taking the form of a directional seat valve.
摘要:
Die Erfindung betrifft eine Exzenterschneckenpumpe (1,30) zur Förderung von Fluiden und / oder körnigen Medien (M). Der Pumpenkörper (3) der Exzenterschneckenpumpe (1,30) umfasst einen Einlassbereich (4), eine Pumpeinheit (5) und einen Auslassbereich (6). Dem Einlassbereich (4) ist eine Antriebseinheit (12) zugeordnet. Die Pumpeinheit (5) besteht aus einem Rotor (8) und einem Stator (7), wobei sich der Rotor (8) exzentrisch im Stator (7) bewegt. Der Einlassbereich (4) bildet die Saugseite (S) und der Auslassbereich (6) die Druckseite (D) der Exzenterschneckenpumpe (1,30). Der Exzenterschneckenpumpe (1,30) ist eine Bypass-Verbindung (2) mit mindestens einem Sicherheitsventil (20,40) zugeordnet, zur Aufnahme und Rückleitung von rückströmendem Medium zwischen der Druckseite (D) und der Saugseite (S) der Exzenterschneckenpumpe (1,30). Erfindungsgemäß sind die Bypass-Verbindung (2) und das Sicherheitsventil (20,40) in den Pumpenkörper (3) der Exzenterschneckenpumpe (1,30) integriert.
摘要:
A fixed capacity pump (120) has a pressure relief valve piston (136) with two control surfaces (176,180) forming chambers (152,168) with the pump housing (184), such that the pump can be operated at either of at least two selected equilibrium pressures.
摘要:
Provided is an oil supply apparatus for an engine provided with a two-stage relief valve, in which a sufficient amount of working fluid is supplied in proportion to an engine speed in a low speed range where sufficient lubrication is not performed and a flow rate of the working fluid is reduced in a medium and high speed range where smooth lubrication is performed to reduce a rotational load applied to a crankshaft, capable of reducing an engine load to decrease fuel consumption to improve fuel efficiency as well as improving a lubrication operation through supply of an appropriate flow rate.