Internal-combustion engines – Engine speed regulator – Idle speed control
Patent
1981-03-09
1983-09-20
Lall, Parshotam S.
Internal-combustion engines
Engine speed regulator
Idle speed control
123438, F02B 300
Patent
active
044049412
ABSTRACT:
An internal combustion engine carburetor is disclosed which includes an induction passage provided therein with venturi means and controlled by throttle valve means, a fuel bowl connected through a main solenoid valve to a main fuel passage for discharging fuel through a main nozzle opening into the venturi means, a fuel pump connected through an auxiliary solenoid valve to an auxiliary fuel passage into which an air bleed opens for discharging fuel through a sonic nozzle opening into the induction passage downstream of the throttle valve means, and fast-idle mechanism for forcing the throttle valve means to open to a predetermined angle from its closed position. A control circuit is provided for providing a control signal corrected based on the density of atmospheric air, which corresponds to the rate of air flow through the induction passage for controlling the main and auxiliary solenoid valves. The control circuit is adapted to drive the fast-idle mechanism at low engine temperatures.
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Lall Parshotam S.
Nissan Motor Company Limited
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