FLOW PASSAGE SWITCHING VALVE, INTERNAL COMBUSTION ENGINE, AND EGR METHOD OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a flow passage switching valve which quickly and selectively switches a plurality of inlet-side flow passages to lead to an outlet-side flow passage by using relatively high-pressure driving gas, and prevents breakage of a seal member for sealing the flow passages, and to provide an internal combustion engine, and an EGR (Exhaust Gas Recirculation) method of the internal combustion engine.SOLUTION: The flow passage switching valve 50A selectively opens/closes one or more of a plurality of inlet-side flow passages 51a, 51b to lead to a single or multiple outlet-side flow passages 52a. A shutter member 55 is provided which slides between the inlet-side flow passages 51a, 51b-side and the outlet-side flow passage 52a-side provided in the case 54. A seal member is arranged between the shutter member 55 and the case 54 for sealing the outlet-side flow passage 52a. A guide member 53 is provided to slide the shutter member 55 above an inner wall surface of the outlet-side flow passage 52a side of the case 54. A space P is formed between the shutter member 55 and the inner wall surface.