초록 ▼

Between the two half-molds (2, 3) fixed against each other in order to form an envelope (1), one-piece blow-molded air tubes (12a, 12b) are mounted; the outlet (14a, 14b) of the tubes is held in a half-mold (3) by means of a fixing clamp (6) to the cylinder-head of the engine while being sealingly c

Between the two half-molds (2, 3) fixed against each other in order to form an envelope (1), one-piece blow-molded air tubes (12a, 12b) are mounted; the outlet (14a, 14b) of the tubes is held in a half-mold (3) by means of a fixing clamp (6) to the cylinder-head of the engine while being sealingly connected to an opening (7) of the clamp (6) for supplying one cylinder by means of a tubular nozzle formed of a cradle (20a, 20b) molded with the clamp (6) and the half-mold (3), and a staple (22a, 22b) fixed to the cradle to hold a ring (17) on the outlet of the tube while compressing a seal (18) between the tubes (12a, 12b) and the nozzle. Application particularly to intake manifolds of engines with multipoint injection and controlled ignition.

대표청구항 ▼

[ We claim:] [1.] An inlet manifold for an internal combustion engine, comprising:an envelope delimiting a plenum chamber to be supplied with air for supplying an engine via a variable-delivery valve, and equipped with at least one flange for attaching it to a cylinder head of the engine, said at le

[ We claim:] [1.] An inlet manifold for an internal combustion engine, comprising:an envelope delimiting a plenum chamber to be supplied with air for supplying an engine via a variable-delivery valve, and equipped with at least one flange for attaching it to a cylinder head of the engine, said at least one flange having at least one supply opening for supplying each cylinder of an engine, each supply opening being open, on the one hand, into the envelope and, on the other hand, into a face for attaching said at least one flange to the cylinder head, andair-induction tubes each made as a single piece with a desired shape, corresponding in number to a number of cylinders in the engine, and which are mounted in the envelope so that each of the air-induction tubes supplies a corresponding cylinder with air which each of the air induction tubes receives via its inlet in a plenum chamber and which each of the air-induction tubes transmits to a corresponding opening in said at least one flange via its outlet connected to its at least one supply opening by leaktight connection means comprising a tubular end piece in which an outlet end part of an air-induction tube is held in said envelope with an insertion of at least one flexible seal between an induction tube and a tubular end piece, wherein each said tubular end piece is made with, on the one hand, a cradle integral with said at least one flange and projecting from an opposite side to a cylinder head, in line with a corresponding supply opening, said cradle being of a generally semi-cylindrical shape, of which an end inside said envelope has an annular end wall forming a stop projecting toward an inside of said cradle and, on the other hand, a stirrup piece for holding said tube in said cradle, said stirrup piece having a stop projecting toward an inside of said cradle and facing an annular end wall of said cradle, a ring being attached and fixed around said tube close to its air outlet, said flexible seal being attached around said tube between said ring and said air outlet of said tube, the outlet end part of said tube with said ring and said seal being in place in said corresponding cradle in such a way that said ring or said seal is retained by butting against said annular end wall of said cradle, said stirrup piece being attached to said cradle and a part of said tube which is held therein, and being fixed to the edges of said cradle.