Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1975-04-08
1977-06-07
Burns, Wendell E.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
F02M 2506
Patent
active
040276350
ABSTRACT:
A flow rate control mechanism for use in controlling the flow rate of exhaust gases in an exhaust gas re-circulating system of an internal combustion engine. This mechanism includes a swirl flow chamber having a circular cross section, a first nozzle and a second nozzle, the former of which is open through the inner wall of the swirl flow chamber therein in the direction normal thereto and the latter of which is open through inner wall of the swirl flow chamber therein in the direction tangential thereto. The latter nozzle is positioned close to the opening of the former or first nozzle. The first nozzle directed in the normal direction extracts part of exhaust gases through an exhaust manifold, while the second nozzle directed in the tangential direction is communicated with atmosphere. The opening of the first nozzle is close to the opening of the second nozzle, so that the pressure at the opening of the first nozzle approximates the atmospheric pressure. As a result, the flow rate of exhaust gases which having been extracted through the exhaust manifold and fed into the flow rate control mechanism will be proportional to the square root of the exhaust gas pressure. On the other hand, the flow rate of intake air will be proportional to the square root of the exhaust gas pressure. Thus, the exhaust gases at a flow rate proportional to that of intake air is introduced into the swirl flow chamber, so that the both gases are mixed therein and fed into an intake manifold.
REFERENCES:
patent: 3304711 (1967-02-01), Eastman
patent: 3397682 (1968-08-01), Riggan
patent: 3435810 (1969-04-01), Busse
patent: 3566610 (1971-03-01), Fiore
patent: 3672340 (1972-06-01), Bomba
patent: 3744251 (1973-07-01), Hallum
patent: 3817232 (1974-06-01), Nakajima et al.
patent: 3866585 (1975-02-01), Kopa
patent: 3890945 (1975-06-01), Goto et al.
Goto Kenji
Hashiguchi Yukihide
Shibata Norio
Burns Wendell E.
Toyota Jidosha Kogyo Kabushiki Kaisha
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