Internal-combustion engines – High tension ignition system – Using capacitive storage and discharge for spark energy
Patent
1987-03-24
1988-07-19
Nelli, Raymond A.
Internal-combustion engines
High tension ignition system
Using capacitive storage and discharge for spark energy
F02P 304
Patent
active
047577975
ABSTRACT:
A circuit for generating a charge voltage in a capacitive ignition system having an inductive source for producing a voltage substantially below the required charge voltage. The circuit includes, in series, an electronic switch and a resistor connected across the voltage source to form a controllable current path. Connected parallel thereto is a charging circuit for the capacitive ignition system. A control circuit is connected across the resistor and is adapted to control the state of the electronic switch. The control circuit also has a self-holding circuit. During the build-up of the source voltage, the electronic switch is in its closed state resulting in a heavy current flow therethrough. This in turn results in a build-up of voltage across the resistor actuating the control circuit. The control circuit causes the electronic switch to change into a cutoff state, thereby causing a build-up of the charge voltage for the capacitive ignition system. The self-holding circuit acts to keep the control circuit in a condition for holding the electronic switch in the cutoff state during the presence of the voltage pulse generated by the source.
REFERENCES:
patent: 4404940 (1983-09-01), Sieja
patent: 4436076 (1984-05-01), Pitco
patent: 4462363 (1984-07-01), Nanjyo et al.
patent: 4611569 (1986-09-01), Kondo et al.
patent: 4612899 (1986-09-01), Honjoh et al.
patent: 4624234 (1986-11-01), Koketsu et al.
patent: 4644927 (1987-02-01), Okuda
AB Svenska Elektromagneter
Nelli Raymond A.
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