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Electro-pneumatic assembly, particularly for a pneumatic braking installation for railway vehicles

  • US 10,538,229 B2
  • Filed: 11/12/2015
  • Issued: 01/21/2020
  • Est. Priority Date: 11/13/2014
  • Status: Active Grant
First Claim
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1. An electro-pneumatic assembly, particularly for a pneumatic braking installation of a railway vehicle or train, comprising:

  • a body wherein a chamber is defined;

    a solenoid supply valve adapted for selectively coupling said chamber to a pressure source or an atmosphere;

    a solenoid vent or a discharge valve adapted to allow and to selectively prevent a connection of said chamber to the atmosphere;

    said solenoid supply valve and said solenoid vent or discharge valve being provided with respective control solenoids to which respective electronic switches are coupled; and

    electronic control means adapted to provide, as a function of values of at least one input signal, logic control signals to said electronic switches such as to control, through said solenoid supply valve and said solenoid vent or discharge valve, a value of the pressure in said chamber, wherein;

    said electronic control means comprise first and second electronic processing and control devices independent of one another, the first and the second electronic processing and control devices being equivalent to one another, both receiving said at least one input signal, and executing strategies for controlling the pressure in said chamber;

    each of said first and second electronic processing and control devices is coupled to the control solenoids of the solenoid supply valve and the solenoid vent or discharge valve through respective first and second electronic switches; and

    the first electronic switches and the second electronic switches are coupled to one another in a predetermined manner, so as to form together an enabling logic circuit designed to drive the solenoids of said solenoid supply valve and said solenoid vent or discharge valve, the driving of the solenoids comprising;

    when the logic control signals provided by said first and second electronic processing and control device conflict with one another, the logic control signals that are actuated being the logic control signals supplied by the electronic processing and control device which produce in said chamber a pressure whose value complies with a predetermined relationship when compared against the pressure value which would be produced if the logic control signals supplied by the other electronic processing and control device were to be actuated.

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