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    CONTROL SYSTEM AND METHOD FOR CONTROLLING A POSITIVE DISPLACEMENT PUMP
    5.
    发明公开
    CONTROL SYSTEM AND METHOD FOR CONTROLLING A POSITIVE DISPLACEMENT PUMP 审中-公开
    用于控制正位移泵的控制系统和方法

    公开(公告)号：EP3207254A1

    公开(公告)日：2017-08-23

    申请号：EP15775819.4

    申请日：2015-09-17

    Applicant: VHIT S.p.A.

    Inventor： CADEDDU, Leonardo

    IPC: F04C14/22 ,  F04C2/344

    CPC classification number: F04C14/226 ,  F04C2/344

    Abstract: A control system comprising: - a variable volume positive displacement rotary pump (2), in turn comprising: i) a stator (20) that is movable so as to determine a variation in the volume of the pump (2); ii) a first thrust chamber (21 ) for thrusting the stator (20) and designed to be filled with a fluid processed by the pump so as to determine a movement of the stator (20) and a variation in the volume of the pump (2); -a supply line (3) for supplying the fluid processed by the pump (2) to a load; -an element (4) that defines a localized loss in load, said element (4) being located along said supply line (3); -control means (5) for controlling the flow of the fluid supplying said first chamber (21 ), said control means (5) being able to assume at least a first and a second configuration; -a first branch (31, which, in the first configuration of the control means (5), allows for collecting the fluid to be directed into the first thrust chamber (21 ) from said supply line (3), downstream of said element (4); -a second branch (32), which, in the second configuration of the control means (5), allows for collecting the fluid to be directed into the first thrust chamber (21 ) from said supply line (3), upstream of said element (4); with respect to the first configuration, said second configuration enabling functioning of the load under more demanding conditions.

    Abstract translation: 1。一种控制系统，包括： - 可变容积容积式旋转泵（2），其又包括：i）可移动的定子（20），以确定泵（2）的容积的变化; ii）第一推力室（21），其用于推动所述定子（20）并设计成充满由所述泵处理的流体以确定所述定子（20）的运动和所述泵的体积变化（ 2）; - 用于将由泵（2）处理的流体供应到负载的供应管线（3） - 元件（4），其限定负载的局部损失，所述元件（4）沿着所述供应线（3）定位; - 控制装置（5），用于控制供给所述第一腔室（21）的流体的流量，所述控制装置（5）能够采取至少第一和第二配置; - 第一分支（31），其在控制装置（5）的第一配置中允许从所述供应管线（3）收集待引导到第一推力腔室（21）中的流体，所述流体在所述元件 ; - 第二分支（32），其在控制装置（5）的第二构造中允许从所述供应管线（3）收集待引导到第一推力腔室（21）中的流体，上游 的所述元件（4）;相对于所述第一构造，所述第二构造能够在更苛刻的条件下使所述负载起作用。

    A HYDRAULIC BRAKING DEVICE HAVING SECURITY PROVISIONS, FOR A FARM TRACTOR OR A SIMILAR VEHICLE
    7.
    发明授权
    A HYDRAULIC BRAKING DEVICE HAVING SECURITY PROVISIONS, FOR A FARM TRACTOR OR A SIMILAR VEHICLE 有权
    与安全措施拖拉机或类似车辆液压制动装置

    公开(公告)号：EP2244918B1

    公开(公告)日：2011-08-10

    申请号：EP09701482.3

    申请日：2009-01-12

    Applicant: VHIT S.p.A. Unipersonale

    Inventor： CADEDDU, Leonardo

    IPC: B60T11/21 ,  B60T13/14

    CPC classification number: B60T8/4845 ,  B60T8/4004 ,  B60T11/203 ,  B60T11/21

    Abstract: A braking system for farm tractors and similar vehicles, comprising a differential braking system and a hydraulic system for the braking assistance forming a system unit (H) which includes two circuit branches (H1,H2), each circuit branch operating the braking with respect of one side of the vehicle. According to the invention, to said system unit (H) are applied, through connection interfaces (36,37), two control units (C1,C2), each control unit including an electrovalve (20) and a distributor (24) operated by said electrovalve, each said distributor (24) controlling the operation of the system unit (H) with respect to one of the circuit branches (H1,H2), and each said electrovalve (20) being singularly controlled by an electronic control circuit (EL) provided with sensors (V,R,P,A) of the main vehicle parameters, such as a sensor (V) of the vehicle speed, sensors (R) of the speed of singular wheels, sensors (P) of the positions of the braking pedals and a sensor (A) of the position of the accelerator pedal. In this manner the vehicle is equipped with a function of regulation of the slip in traction (ASR), or with a function preventing the wheel blockage in braking (ABS), or with a function of stability control (ESP), or with several of these and other functions, having a great utility to the aim of security when the vehicle runs on road at a high speed.

    A SYSTEM FOR THE SUCTION OF A FLUID, HAVING THE ADDITIONAL FUNCTION OF SUCKING ANOTHER FLUID
    8.
    发明公开
    A SYSTEM FOR THE SUCTION OF A FLUID, HAVING THE ADDITIONAL FUNCTION OF SUCKING ANOTHER FLUID 审中-公开
    系统流量在流体中与另一种流体的附加功能吸吮

    公开(公告)号：EP1740835A1

    公开(公告)日：2007-01-10

    申请号：EP05716256.2

    申请日：2005-03-17

    Applicant: VHIT S.p.A.

    Inventor： CADEDDU, Leonardo ,  JEZEK, Christian

    IPC: F04B49/04 ,  B60T13/24

    CPC classification number: F04B49/04

    Abstract: A suction system comprising a suction pump (1) having at least one suction connection (2,2',2') and a delivery connection (3), a receiving reservoir (4) connected to the delivery connection (3), connecting pipings from a suction connection (2,2') to a first space (7) from which a first fluid (8) should be sucked, and connecting pipings from the delivery connection (3) to the receiving reservoir (4), characterized in that the system further comprises a connecting piping (14,15,16) extending from a second space (10), from which a second fluid (11) should be sucked, to a suction connection (2,2') of the pump (1), and comprises a device (12) disposed for causing an intermittent operation of the second fluid suction by the pump (1), responsive to the level reached by the second fluid (11) in the second space (10). Preferably, the pump (1) is a vacuum pump, the first fluid (8) is air, the first space (7) is a depressurized reservoir, the second fluid (11) is oil and the second space (10) is a space wherein oil (11) has a tendency to accumulate. The system is especially, but not exclusively, intended for automotive applications.

    VALVE PNEUMATIQUE POUR SYSTEMES DE FREINAGE
    9.
    发明公开
    VALVE PNEUMATIQUE POUR SYSTEMES DE FREINAGE 有权
    空气阀制动系统

    公开(公告)号：EP1511662A1

    公开(公告)日：2005-03-09

    申请号：EP03732462.1

    申请日：2003-05-26

    Applicant: VHIT S.p.A. Vacuum & Hydraulic Products Italy

    Inventor： CADEDDU, Leonardo

    IPC: B60T13/57 ,  F16K31/126 ,  G05D16/06

    CPC classification number: G05D16/0655 ,  B60T13/57 ,  F16K31/1262 ,  F16K31/1266

    Abstract: The invention primarily relates to a pneumatic valve which limits the pressure level of a pneumatic fluid obtained by means of a low-pressure pneumatic fluid source (3) having a pneumatic element (5) using said pneumatic fluid, characterized in that said valve comprises a housing (11) wherein a skirt (21) is sealingly and slidingly mounted, said skirt dividing the inside of the housing (11) into a first chamber (17) and a second chamber (19), said housing comprising a first orifice (13) enabling the first chamber (17) to be fed by the source (3) of low-pressure pneumatic liquid, a second orifice (15) enabling the first chamber (17) and the element (5) to communicate with each other, and a third orifice (23) enabling the second chamber (19) to be fed with high-pressure pneumatic fluid, the first chamber (17) also comprising elastic means (27) for the return of said skirt (21), which are placed between the skirt (21) and the housing (11), said skirt (21) comprising means (33,41) for closing at least one communicating orifice (13, 15) between the vacuum source (3) and the pneumatic element (5).

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