Internal-combustion engines – Engine speed regulator – Idle speed control
Patent
1983-09-07
1985-06-25
Argenbright, Tony M.
Internal-combustion engines
Engine speed regulator
Idle speed control
F02D 902, F02D 3100
Patent
active
045247382
ABSTRACT:
A process and a device for controlling the idling speed of a heat engine with controlled ignition by modification of the airflow admitted to the intake manifold of the engine when predetermined idling conditions are detected, wherein the air flow modification is performed by a double-action actuator that causes the passage section of a bypass to vary in parallel with the ordinary gas butterfly or the position of the idling stop of this butterfly. A control signal for controlling the actuator is processed by a microprocessor which receives signals indicative of predetermined input parameters, including the primary current for ignition, and derives the control signal on the basis of the received signals. For each ignition pulse provided by the interruption of the primary ignition current, the period between ignition pulses is determined, as well as the slope of the period. Predetermined comparisons are made between the determined period and slope and an instruction period based on predetermined of the input parameters, and the results are algebraically processed, all by a microprocessor. A remainder is produced as a result of the algebraic processing, and this remainder is utilized in subsequent processing to enhance immunity from instabilities of the invention and to damp any significant period deviation in relation to an instruction value.
REFERENCES:
patent: 3645241 (1972-02-01), Huntzinger
patent: 4401073 (1983-08-01), Furuhashi
patent: 4406262 (1983-09-01), Ikeura
patent: 4441471 (1984-04-01), Kratt et al.
patent: 4455978 (1984-06-01), Atago et al.
Argenbright Tony M.
Regie Nationale des Usines Renault
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