Intake port structure for internal combustion engines

Details Intake port structure for internal combustion engines Intake port structure for internal combustion engines

1984-04-04

1985-06-04

Lazarus, Ira S.

Internal-combustion engines

Means to whirl fluid before, upon, or after entry into...

Having multiple oxidant inlet means

123432, F02B 3100

Patent

active

045207763

ABSTRACT:
An intake port structure comprises a cylinder head including combustion chambers and supporting an intake valve and an ignition plug in each of the combustion chambers, the intake valve having a stem slidably supported by the cylinder head, the cylinder head having a joint surface to which an intake manifold is connected. A primary intake passage is defined in the cylinder head and communicates with each of the combustion chambers, the primary intake passage having a primary intake port directed toward the stem and the ignition plug, and an opening at the joint surface. The opening has a central axis extending at an angle smaller than 90.degree. with respect to the joint surface. The primary intake passage is smoothly curved between the primary intake port and the opening. The intake manifold has a plurality of primary manifold branches arranged substantially symmetrically with respect to a central axis of the intake manifold.

REFERENCES:
patent: 3087480 (1963-04-01), Baudry
patent: 3678905 (1972-07-01), Diehl
patent: 4265207 (1981-05-01), Hayashida
patent: 4271801 (1981-06-01), Yamakawa et al.
patent: 4286561 (1981-09-01), Tsutsumi

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