Russia - of Tari piston engine intake system

摘要

PURPOSE:To effectively take compression waves in a cylinder and plan improvement of engine output by opening an auxiliary intake air port, which is closed later than a main intake air port, when the communicating length of intake air passages between groups of cylinders is long within the range of high engine speed. CONSTITUTION:In regard to a two cylinder rotary engine, the primary intake air passage 10 is connected to the primary port (main intake air port) 7 of each cylinder and also a secondary intake air passage 12 is connected to the secondary main port (main intake air port) 8 and the secondary auxiliary port (auxiliary intake air port) 9. And two primary intake air passages 10, 10 and two secondary intake air passages 12, 12 are respectively connected to each other by the first communication passages 17a, 18a and the second shorter communication passages 17b, 18b and control valves 21, 22 are attached to the second passages 17b, 18b respectively. And respective control valves 21, 22 are opened at the fixed engine speed or more in the range of the high engine speed, and the auxiliary port 9 is controlled to open when at least the control valves 21, 22 are closed.