ASSIST GAS SYSTEM OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To extensively improve air intake efficiency by reducing conduit loss in an air intake pipe. SOLUTION: An air intake passage 12 is furnished with an upstream side air intake pipe 302 and a downstream side air intake pipe 303 connected to its downstream side. An assist gas passage 34 is connected to an upstream end part of the downstream side air intake pipe 303, and pressurized assist gas is introduced to the inside of an accumulator 306 through the same passage 34. A clearance 310 extending in the flowing direction of intake air in parallel by a specified distance is formed between the downstream side end part of the upstream side air intake pipe 302 and a part to cover the same end part on the downstream side air intake pipe 303. An annular nozzle 319 extending along an inner wall surface of the downstream side air intake pipe 303 is constituted of the clearance 310. Assist gas of the accumulator 306 is introduced to the inside of the nozzle 319 as its flow is throttled by an inclined pipe wall 308 and delivered to the inside of the downstream side air intake pipe 303 from the same nozzle 319.