Intake-pipe arrangement for in-line internal combustion engines

Intake-pipe assembly, for internal combustion engines of the type including four to six cylinders arranged in a line or the like, comprising:

• an intake manifold;
• and a plurality of intake pipes of substantially similar total lengths extending from said intake manifold in approximately one plane, pairwise and opposite one another,
• each of said intake pipes including a manifold end segment, a connecting end segment having an extreme end portion attachable to inlet channel means of an engine and a curved intermediate segment interconnecting the respective manifold end segments and connecting end segments, the connecting end segments being arranged approximately parallel to one another and approximately at right angles to the manifold segments emerging from the intake manifold,
• wherein said intermediate segments overlap one another and extend pairwise in respective intermediate segment planes intersecting said one plane at different angles, said intermediate segment planes being angularly inclined with respect to one another and intersecting with one another in the vicinity of the connecting end segments in a common intersection area which runs at right angles to the connecting end segments.