Plastic intake pipe and the method thereof

Details Plastic intake pipe and the method thereof Plastic intake pipe and the method thereof

1992-12-30

1993-09-14

Cross, E. Rollins

Internal-combustion engines

Multiple cylinder

123 52MC, 264259, F02B 7518

Patent

active

052439330

ABSTRACT:
A plastic intake pipe for an internal combustion engine, has an inside pipe provided in the plastic intake pipe and formed integrally from the intake duct portion to the intake manifold portion, a supporting member inserted in the inside pipe for supporting an inside wall of the inside pipe for fixing the intake duct portion and the intake chamber, and an outside pipe for entirely covering the inside pipe. The intake pipe prevents itself from deforming and damaging while assembling in the internal combustion engine and provides a simple structure for handling. A method of producing the plastic intake pipe forms integrally an inside pipe of the intake pipe body having an intake duct portion, an intake chamber portion connected to a downstream side of the intake duct portion, and an intake manifold portion connected to a downstream side of the intake chamber portion, then fixes at least the intake chamber and the intake duct portion of the inside pipe by a supporting member, thereafter inserts the inside pipe in a cavity mold, and forms an outside pipe on the outer periphery of the inside pipe by injection-molding the plastic material in the mold. Hence production and handling are easy, and an intake noise can be reduced.

REFERENCES:
patent: 3875918 (1975-04-01), Loynd
patent: 4743481 (1988-05-01), Quinlan et al.
patent: 4776313 (1988-10-01), Freismuth et al.
patent: 4903645 (1990-02-01), Borger
patent: 5138983 (1992-08-01), Daly

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