| 摘要 |
The assembly (10) comprises a body wherein there are defined a chamber (11), a supply valve (12) adapted to connect the chamber (11) to a pressure source (Ps) or to the atmosphere, and a vent valve (13) adapted to allow or prevent the connection of the chamber (11) to the atmosphere. The valves (12, 13) are provided with control solenoids (12a, 13a) to which respective electronic switches (19, 20; 19, 119; 20, 120) are coupled. The assembly (10) also comprises electronic control devices (16, 116; 1016) adapted to provide, as a function of the values of at least one input signal (L, P), logic control signals to the electronic switches (19, 119; 20, 120) so as to control, through the valves (12, 13), the value of the pressure (P) in the chamber (11). The control means comprise two processing and control devices (16; 116) independent of one another, both receiving the input signal (L, P) and designed to execute strategies for controlling the pressure in the chamber (11), equivalent to one another. These processing and control devices (16; 116) are each coupled to the solenoids (12a, 13a) of the supply valve (12) and the solenoid vent valve (13) through respective first (19, 20) and second (119, 120) electronic switches. The first electronic switches (19, 20) and the second electronic switches (119, 120) respectively are coupled to one another so as to form an enabling logic circuit designed to drive the solenoids (12a, 13a) of said solenoid valves (12, 13) in predetermined ways. |
