Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1977-12-14
1980-04-29
Burns, Wendell E.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123117A, 123119EC, F02D 3500, F02M 2506
Patent
active
042000718
ABSTRACT:
An internal combustion engine is equipped with an air line for admitting supplementary air to the induction manifold or the exhaust manifold in order to compensate for an intentional air deficiency, so as to make the mixture stoichiometric. The air line is throttled by a pneumatically activated throttle valve which is subject to at least two control pressures, one of these being the atmosphere or a constant pressure and the other being, for example, the induction tube vacuum. The termini of the two lines which admit these control pressures are so disposed in the valve as to be jointly openable and closable, in opposite phase, by an electromagnetically controlled valve-closing leaf-spring. The electromagnet is energized by a current of variable frequency, the frequency being dependent on the exhaust gas composition as monitored by an oxygen sensor.
REFERENCES:
patent: 3961608 (1976-06-01), Hertfelder
patent: 3963011 (1976-06-01), Saito et al.
patent: 4005691 (1977-02-01), Stumpp
patent: 4061117 (1977-12-01), Ikeura
patent: 4071003 (1978-01-01), Aono
Dillmann Gerhard
Linder Ernst
Maurer Helmut
Burns Wendell E.
Greigg Edwin E.
Robert & Bosch GmbH
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