THROTTLE Russian patent published in 1994 - IPC

FIELD: automatic control. SUBSTANCE: throttle body 1. Control element in the form of piston 2 with throttling element is located between inlet and outlet spaces of body. Throttling element is manufactured in the form of insert 5 made of porous permeable material and is installed into radial groove 4 of piston. It is connected via blind axial duct 3 to inlet space. Side surface of body has holes 6 which are connected through outlet space formed by chamber 7 to user. Piston 2 is joined to drive of reciprocating motion. Consumption ratio of gas impurities is controlled with partial or complete mating of outer surface of insert with faces of holes 6. EFFECT: increased accuracy of throttle. 3 dwg