Intake port structure for internal combustion engines

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

1982-04-21

1984-09-04

Lazarus, Ira S.

Internal-combustion engines

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

Having multiple oxidant inlet means

123432, 123188M, 123193H, F02B 3102

Patent

active

044690630

ABSTRACT:
An intake port structure for an internal combustion engine having a primary intake passage defined in a cylinder head for supplying an air-fuel mixture into a combustion chamber in a full range of loads, and a secondary intake passage defined in the cylinder head for supplying an air-fuel mixture into the combustion chamber under relatively high load conditions. The primary intake passage has a first outlet port opening into the secondary intake passage immediately upstream of the valve face of an intake valve. The secondary intake passage has a second outlet port opening into the combustion chamber through the valve face. A wall projects sidewardly into the secondary intake passage adjacent to the second outlet port for deflecting an air-fuel mixture flowing from the secondary intake passage into the combustion chamber to form a swirl of air-fuel mixture in the combustion chamber. The air-fuel mixture flowing from the primary intake passage is guided along a side of the wall which faces upstream in the secondary intake passage, and is also guided by a groove extending from the first outlet port into the secondary intake passage. The side of the wall and the groove assist the air-fuel mixture flowing from the primary intake passage in forming a swirl of air-fuel mixture in the combustion chamber.

REFERENCES:
patent: 3045655 (1962-07-01), Formia
patent: 3273551 (1966-09-01), Julien et al.
patent: 4159011 (1979-06-01), Sperry
patent: 4180041 (1979-12-01), Miyazaki et al.
patent: 4265207 (1981-05-01), Hayashida
patent: 4271801 (1981-06-01), Yamakawa et al.
patent: 4286561 (1981-09-01), Tsutsumi
patent: 4359026 (1982-11-01), Holthausen et al.

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