Internal-combustion engines – High tension ignition system – Having specific trigger circuitry
Patent
1979-07-26
1981-03-03
Argenbright, Tony M.
Internal-combustion engines
High tension ignition system
Having specific trigger circuitry
123644, F02P 100
Patent
active
042534429
ABSTRACT:
The voltage across a capacitor is changed in a first direction while the current in the primary winding of the ignition coil increases to a predetermined value less than the value required for ignition and is thereafter changed in a second direction until ignition takes place. The voltage across the capacitor is applied to the inverting input of a difference amplifier constituting a threshold stage controlling the initiation and termination of current flow through the ignition coil. The two changes are symmetrical when the engine speed remains constant. The residual voltage across the capacitor at the end of the second change is maintained until the start of the next subsequent first change, so that the time at which the threshold stage switches in, that is the time at which primary current starts to flow in the ignition coil changes as a function of the residual voltage in the capacitor.
REFERENCES:
patent: 3892219 (1975-07-01), Preiser et al.
patent: 3937193 (1976-02-01), Kim
patent: 4176645 (1979-12-01), Jundt et al.
Bodig Bernd
Hohne Gerd
Jundt Werner
Kalkhof Bernd
Pfaff Georg
Argenbright Tony M.
Robert & Bosch GmbH
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