Internal-combustion engines – Starting device – For airplane
Patent
1977-08-04
1979-08-28
Myhre, Charles J.
Internal-combustion engines
Starting device
For airplane
123179L, 123198D, 290 7, F02N 1700, F02D 2906
Patent
active
041657276
ABSTRACT:
In an internal combustion engine an automatic fuel pump switch connects a fuel pump motor to the battery. An electronic sensing circuit is connected to the output winding of an engine-driven alternator which is also connected to charge the battery. The sensing circuit includes a sensing transistor connected to continuously sense the two instantaneous voltages relating to ground that appear as alternating current (A.C.) voltages at the opposite ends of the alternator output winding and produces an output only when one voltage is above a selected positive level while the other voltage is lower than the first voltage by a minimum amount. A control transistor circuit is connected to the output of the sensing transistor and is turned on to operate the fuel pump only when the engine is turning over at a sufficient rate to start and run.
REFERENCES:
patent: 2912595 (1959-11-01), Kehm et al.
patent: 2949906 (1960-08-01), Voigt
patent: 2989644 (1961-06-01), Schultz
patent: 3398731 (1968-08-01), Johansson
patent: 3502895 (1970-03-01), Ballou
patent: 4077381 (1978-03-01), Firey
Fitzner Arthur O.
Kruncos Francis E.
Brunswick Corporation
Myhre Charles J.
Reynolds D.
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