Method of controlling composite intake manifold system for inter

Details Method of controlling composite intake manifold system for inter Method of controlling composite intake manifold system for inter

1987-11-05

1989-10-24

Okonsky, David A.

Internal-combustion engines

Multiple cylinder

123432, 123572, F02B 300

Patent

active

048754382

ABSTRACT:
A composite intake manifold system for supplying intake air to an internal combustion engine includes an intake distribution chamber coupled to a throttle valve disposed upstream thereof in a direction in which the intake air flows, longer and shorter intake pipes extending from the intake distribution chamber, bypass valves disposed in the shorter intake pipes, respectively, the longer and shorter intake pipes being joined into intake passages downstream of the bypass valves in the direction of air-flow, the intake passages being adapted to be connected to respective cylinders of the internal combustion engine. The amount of the intake air to flow into the intake distribution chamber is adjusted by the throttle valve. The bypass valves are controlled so as to be selectively fully closed, partly opened, and fully opened according to operating conditions of the internal combustion engine. The bypass valves are fully closed when the internal combustion engine operates in a low speed range, partly opened when the internal combustion engine operates in a medium speed range, and fully opened when the internal combustion engine operates in a high speed range.

REFERENCES:
patent: 4528958 (1985-07-01), Yoshida et al.
patent: 4617897 (1986-10-01), Sasaki et al.
patent: 4643136 (1987-02-01), Ura et al.
patent: 4656991 (1987-04-01), Fukuo et al.
patent: 4664076 (1987-05-01), Miyano et al.
patent: 4669428 (1987-06-01), Ichida et al.
patent: 4702203 (1987-10-01), Ohmi et al.

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