Internal-combustion engines – Intake manifold – Manifold tuning – balancing or pressure regulating means
Patent
1977-04-01
1978-08-22
Burns, Wendell E.
Internal-combustion engines
Intake manifold
Manifold tuning, balancing or pressure regulating means
123 32EA, 123119D, 123119EC, 123124B, F02D 104, F02D 3500, F02D 3300, F02B 1500
Patent
active
041081277
ABSTRACT:
An auxiliary air control system controls the flow of air into the intake manifold of an internal combustion engine. The system controls flow through a valve bypassing the main throttle valve to maintain an appropriate rate of air flow. A manifold pressure signal is fed back to a control circuit for comparison with a manifold pressure reference and development of a manifold pressure control signal for positioning the bypass valve to admit air at a rate maintaining the manifold pressure at the reference pressure and thus avoid low manifold pressures as cause excessive emissions of pollutants. A signal indicative of rate of air flow is fed back to the controller for comparison with an air flow reference and development of an air flow control signal for positioning the bypass valve to admit air at a rate maintaining total air flow at the reference rate, as for engine idle. The control signals are applied to admit air at the greater of the two rates. The air flow reference may be controlled as a function of any or all of engine temperature, added load, main throttle opening and starting.
REFERENCES:
patent: 3759232 (1973-09-01), Wahl et al.
patent: 3778729 (1973-12-01), Ciemochowski
patent: 3809028 (1974-05-01), Luchaco
patent: 3817225 (1974-06-01), Priegel
patent: 3859541 (1975-01-01), Hattori et al.
patent: 3964457 (1976-06-01), Coscia
patent: 4015568 (1977-04-01), Horlye
patent: 4020813 (1977-05-01), Hattori et al.
patent: 4036186 (1977-07-01), Hattori et al.
Chapin Leonard Lee
Merrick James Walter
Autotronic Controls Corp.
Burns Wendell E.
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