Internal-combustion engines – Combustion chamber means combined with air-fuel mixture...
Patent
1982-08-10
1984-07-17
Lall, Parshotam S.
Internal-combustion engines
Combustion chamber means combined with air-fuel mixture...
73 35, 123415, F02P 504
Patent
active
044599587
ABSTRACT:
An electronic device for briefly enabling an "anti-pinging" vibration detector used for controlling the ignition timing of an internal combustion engine to advance the generated ignition signal in each cycle in relation to the top dead center point of the piston on compression stroke, by a value which is variable according to the engine speed of rotation, receives an input signal and supplies a periodic "detector active" signal whose start and finish are, in each period, positioned in relation to the top dead center in said cylinder with a predetermined error margin. The device comprises a first stage effective to supply a "detector enabling" signal which defines the start of said "detector active" signal with a first time shift in relation to said input signal and a second stage effective to receive the said "detector enabling" signal from said first stage and to generate a "detector disabling" signal which defines the finish of said "detector active" signal with a second time shift in relation to said input signal. The "detector enabling" signal supplied by said first stage is displaced in relation to said input signal by an interval which is the sum of a constant first interval and of a second interval which corresponds to a constant angle of engine rotation.
REFERENCES:
patent: 3777559 (1973-12-01), Rennick et al.
patent: 3942359 (1976-03-01), Arrigoni et al.
patent: 4002155 (1977-01-01), Harned et al.
patent: 4249494 (1981-02-01), Guipaud
patent: 4279143 (1981-07-01), Guipaud
Equipements Automobiles Marchal
Lall Parshotam S.
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