Apparatus for generating an ignition control signal for an inter

Details Apparatus for generating an ignition control signal for an inter Apparatus for generating an ignition control signal for an inter

1979-10-04

1982-04-27

Myhre, Charles J.

Internal-combustion engines

Charge forming device

Fuel injection system

123416, F02P 508

Patent

active

043264867

ABSTRACT:
In order to control the spark advance of an internal combustion engine in the idling domain, the invention provides circuitry for increasing the spark advance below an upper rpm limit and returning the ignition timing to normal when the engine speed drops below a second lower limit. The continuous temporal shift of an output signal which may be used for engaging the ignition control system of the engine is provided by a very small number of elements, in particular only two timing elements, a flip-flop and a number of logical gates. The two flip-flops are triggered by the respective leading and trailing edges of the engine speed transducer signal. One of the flip-flops defines the upper engine speed limit while the second timing element defines the lower engine speed limit. Two embodiments of the invention are described.

REFERENCES:
patent: 3830207 (1974-08-01), Joseph
patent: 3874351 (1975-04-01), Adler et al.

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