Rotary fluid regulator

A rotary fluid regulator comprising:

• a valve housing with first, second and third openings for accommodating flows of fluid relative to the housing;
• a valve element received rotatably in the valve housing and being hollow to form first and second fluid ducts, the first fluid duct being mounted rotatably in the first opening of the valve housing so that the second fluid duct is movable in the valve housing between a first position where the second fluid duct does not communicate with either of the second and third openings of the valve housing, a second position where the second fluid duct communicates with second opening of the valve housing and a third position where the second fluid duct communicates with the third opening of the valve housing;
• a drive element housing mounted externally of the valve housing;
• a displaceable element having a first end mounted in the drive element housing and a second end configured for rotating the valve element about the first fluid duct and adjusting or blocking a fluidic connection between the first opening and the second and third openings;
• and
• a magnetorheological brake element having a brake housing surrounding a portion of the displaceable element between the valve housing and drive element housing, a magnetorheological material in the brake housing and surrounding a portion of the displaceable element in the brake housing, the magnetorheological material being activatable for influencing or blocking movement of the displaceable element and rotational movement of the valve element in the valve housing.