Intake system for internal combustion engine

Details Intake system for internal combustion engine Intake system for internal combustion engine

1986-09-11

1988-04-05

Myhre, Charles J.

Internal-combustion engines

Multiple cylinder

123 52MC, F02B 7518

Patent

active

047351772

ABSTRACT:
An intake system for an internal combustion engine has an intake passage comprising a common passage portion opening to the atmosphere, a surge tank connected to the downstream end of the common passage portion and a plurality of discrete passage portions branching from the surge tank and respectively connected to the cylinders. At least one interconnecting passage is provided to communicate each of the discrete passage portions with at least one of the other discrete passage portions at a portion downstream of the surge tank, and an on-off valve is disposed at each junction of the interconnecting passage with the discrete passage portions to open and close each junction. The on-off valve is opened when the engine speed exceeds a predetermined speed. The effective cross-sectional area of the each discrete passage portion is smaller in the portion upstream of the junction of the discrete passage portion with the interconnecting passage when in the portion downstream of the same.

REFERENCES:
patent: 3814069 (1974-06-01), Croft et al.
patent: 4590895 (1986-05-01), Yada et al.
patent: 4599977 (1986-07-01), Materazzi

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