Exhaust manifold device for engines

Claim 1

In an engine including at least one pair of cylinders arranged substantially in the form of a V and a turbosupercharger driven with exhaust gases of said cylinders to supply compressed air thereto, an exhaust manifold device, comprising: a pair of exhaust gas inlet members for receiving said exhaust gases; said inlet members being connected integrally with either of said cylinders; a pair of communication members for conducting said exhaust gases; said communication members having the longitudinal lengths thereof variable and either ends thereof connected with either of said inlet members; an exhaust gas collecting member for collecting said exhaust gases to supply same to said turbosupercharger; and said collecting member being connected with the respective other ends of said communication members; each of said communication members comprising an outer tube secured at either end thereof to said collecting member and either of said inlet members and formed at least partially along the longitudinal direction thereof with a bellows and an inner tube provided through said outer tube, said inner tube having one end thereof secured to either of said inlet members and said collecting member and the other end thereof axially movable relative to said outer tube; said communication member further comprising first and second support tubes secured respectively to said inlet member and said collecting member; said outer tube being fixedly fitted on said first and second support tubes; and said inner tube being fixedly fitted at the outer circumferential portion near said one end thereof and slidably fitted at another circumferential portion near said other end thereof in said first and second support tubes.