| 摘要 |
Rotary valve (8) including a position sensing system (24), a stator (18) comprising a stator body (32) and a plurality of stator fluid channels (34) connected to fluid ports (56) coupled to respective fluid supply and delivery lines, and a rotor (20) comprising a rotor body (36) and at least one rotor fluid channel (38). The stator body comprises a valve bearing surface (50) and the rotor body (36) comprises a complementary valve bearing surface slidably engaging the stator valve bearing surface, the rotor fluid channel (38) configured to be brought into fluid communication with stator fluid channels (34) as a function of the relative angular position of the rotor with respect of the stator about a rotor axis A. Each said stator fluid channel comprises an end (64, 66) at said stator body valve bearing surface. The position sensing system comprises a position detector (42) mounted in the stator and complementary sensor position markers (46) mounted in the rotor configured to provide a plurality of discrete detectable positions spaced around the rotor at angular spacings that correspond to angular spacings between the ends of the stator fluid channels that are positioned at the stator valve bearing surface. |
