Intake system for rotary piston engine

Internal-combustion engines – Rotary – With charge treatment means

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Details

123242, F02B 5304

Patent

active

046141731

ABSTRACT:
A multiple rotor type rotary piston engine includes an intake system of individual intake ports provided in at least one of the intermediate and side housings to open to the respective rotor cavities and being cyclically closed by the rotors as the rotor rotate, an intake passage including a common passage and individual passages divided from the common passage and leading respectively to the intake ports, the individual passages being communicated with each other by communicating passages. The intake passage is provided with a turbo-supercharger having a waste gate valve for limiting the intake pressure below a predetermined value so that there is produced an engine operating zone wherein the intake pressure is lower than the exhaust gas pressure. The communication passages and the individual passages leading to the respective rotor cavities have such an overall length that a compression wave produced in one individual passage in opening timing of one intake port is transmitted to the other intake port just before the other intake port is closed to obtain an additional charge in the aforementioned engine operating zone.

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