Air intake system for internal combustion engine

Details Air intake system for internal combustion engine Air intake system for internal combustion engine

1998-03-17

1999-08-17

McMahon, Marguerite

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

F02B 2900

Patent

active

059378158

ABSTRACT:
In an air intake system (14) for internal combustion engines in which combustion air is led into a cylinder via an air inlet path, the air inlet path comprises a double structure of a main inlet path (7a) and a sub inlet path (8a) that the sub inlet path (8a) is placed in the main inlet path (7a) so as to be in close contact with a bottom wall of the main inlet path (7a), a downstream end of the sub inlet path (8a) being positioned near an inlet valve opening (10e) on its one side other than an exhaust valve opening (10d) side; and that an opening/closing valve (9) is disposed within the sub inlet path (8a), wherein the opening/closing valve (9) is closed in a low intake-air amount operating region of the engine so as to allow intake air to be biased from the main inlet path (7a) toward a center of the cylinder and to flow into the cylinder along a cylinder axis.

REFERENCES:
patent: 4862840 (1989-09-01), Matsunaga et al.
patent: 4907547 (1990-03-01), Daly
patent: 4911111 (1990-03-01), Matsunaga

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