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    Electrohydraulic remote control of hydraulic valves
    1.
    发明授权
    Electrohydraulic remote control of hydraulic valves 失效
    液压阀电磁遥控

    公开(公告)号：US3589130A

    公开(公告)日：1971-06-29

    申请号：US3589130D

    申请日：1969-10-30

    Applicant: BOSCH GMBH ROBERT

    Inventor： FLASCHAR HEINZ ,  WEIGERT WILHELM ,  WERNER WALTER ,  KRAMER MANFRED

    IPC: F15B21/08 ,  F15B11/16 ,  F15B15/18

    CPC classification number: F15B21/08 ,  Y10S60/911

    Abstract: An arrangement for controlling remotely hydraulic valves located between a variable displacement pump and a load supplied from the pump. The valve has a control slider the position of which is indicated through a signal generator on the slider. Control levers are also coupled to the slider and the position of these levers is indicated through another signal generator coupled to the levers. A control unit connected to the signal generators, compares their signal outputs and actuates electrohydraulic positioning means for controlling the pump flow as a function of the deflection of the control levers.

    Electrohydraulic remote control arrangement for hydraulic directional valves
    2.
    发明授权
    Electrohydraulic remote control arrangement for hydraulic directional valves 失效
    液压方向阀的电动遥控装置

    公开(公告)号：US3613509A

    公开(公告)日：1971-10-19

    申请号：US3613509D

    申请日：1969-10-30

    Applicant: BOSCH GMBH ROBERT

    Inventor： FLASCHAR HEINZ ,  WEIGERT WILHELM ,  WERNER WALTER ,  KRAMER MANFRED

    IPC: F15B21/08 ,  F15B13/044

    CPC classification number: F15B21/08 ,  Y10T137/87209

    Abstract: An arrangement for controlling directional valves electrohydraulically. The valve is connected between a constant pump and a load which is actuated through fluid under pressure from the pump. The directional valve has a control slide to which a signal transducer is secured to give a signal indicative of the position of the control slide. Control levers are also arranged with the control slide and have signal transducers for indicating the deflection of the control lever from a neutral position. A control circuit is connected to the signal transducers for comparing their signal outputs, and to actuate electrohydraulic positioning member on the control slide for controlling the position of the control slide dependent upon the position of the control lever. A switching valve controls the neutral fluid flow from the pump to the load as a function of the position of the control lever.

    Electrohydraulic remote control of hydraulic directional valves
    3.
    发明授权
    Electrohydraulic remote control of hydraulic directional valves 失效
    液压方向阀的电动遥控器

    公开(公告)号：US3593523A

    公开(公告)日：1971-07-20

    申请号：US3593523D

    申请日：1969-10-30

    Applicant: BOSCH GMBH ROBERT

    Inventor： FLASCHAR HENIZ ,  WERNER WALTER ,  WEIGERT WILHELM ,  KRAMER MANFRED

    IPC: F15B21/08 ,  F15B15/18

    CPC classification number: F15B21/08 ,  Y10S60/911

    Abstract: An arrangement for the electrohydraulic remote control of directional valve in which a variable displacement pump provides fluid under pressure to a load or a hydraulically operated device. Signal transducers are arranged at the pump and the load to provide electrical signals as a function of the pressures prevailing at the pump and the load. An electrical control unit compares the signals from the transducers, and is operatively connected to an electrohydraulic actuated positioning means in the pump when the signals correspond. The regulation is such that the fluid flow from the pump is controlled as a function of the load magnitude.

    6.
    发明专利
    未知

    公开(公告)号：DE1807172A1

    公开(公告)日：1970-06-11

    申请号：DE1807172

    申请日：1968-11-06

    Applicant: BOSCH GMBH ROBERT

    Inventor： FLASCHAR HEINZ ,  WERNER WALTER ,  WEIGERT WILHELM ,  KRAEMER MANFRED

    IPC: F15B21/08 ,  F15B15/18

    Abstract: 1291887 Controlling fluid pressure electrically ROBERT BOSCH GmbH 6 Nov 1969 [6 Nov 1968] 54368/69 Heading G1N In an arrangement for the electro-hydraulic remote control of multiway valves 14,15,16 controlling the pressure fluid flow from a variable delivery pump 11 to a load 32, 33 the pump output is controlled in accordance with the load pressure requirements. In the neutral position of control levers 23,24,25 the adjustable stroke pump 11, the output of which is controlled by electro-hydraulic adjusting device 12, is in its zero stroke position and merely delivers the flow of pressure fluid necessary for the adjusting device 12. In the embodiment shown the flow is through electrohydraulically actuable valve 13 i.e. by way of spring biased closing member 65 between high pressure duct 62 and return line 58. On displacement of control lever 23 to the right transducer 26 produces an electric signal which by way of electric control unit 18 opens electromagnetic valve 73 and keeps closed electromagnetic valve 75 so that pressure fluid flowing into pressure chamber 71 displaces piston 68 to the left to limit the flow of pressure fluid from the pump. The piston moves until the output from transducer 69 is slightly higher than that from pressure transducer 21 measuring the load pressure when valve 73 closes again. Movement of lever 23 simultaneously results in the control unit 18 opening electromagnetic valve 47, 45 remaining closed, to cause differential piston 41 to move to the right so that slide 31 moves to connect feed chamber 34 to load chamber 32 and return chamber 36 to load chamber 33. The movement stops when the outputs from transducers 26 and 49 coincide and valve 47 is closed. The pressure required by the load and measured by transducer 21 is compared with the output pressure of pump 11 as measured by transducer 19. If the delivery of the pump is too small i.e. output signal of 19 falls, the control unit 18 opens electromagnetic valve 59 to increase the pump stroke in the direction of greater delivery. If the delivery is too big the pressure indicated by 19 rises control unit 18 causes valve 57 to open to adjust the pump in the direction of zero-delivery. When the control lever 23 is moved back to the neutral position slide 31 is moved back to its original position. If lever 23 is moved to the left then the output of the pump is compared with the output of transducer 22 instead of 21. In the embodiment of Fig.2 (not shown) a feed pump is employed to provide the fluid pressure for the adjustable device 12, the pump 11 producing no flow at all at zero-delivery. In the arrangement of Fig.3 (not shown) the control medium flow for device 12 is passed directly over electromagnetic valves 57,59, electro-hydraulic valve 13 being omitted.

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