Automotive ignition system with sparkless soft shutdown as thermal overload protection

An interface (100) for providing thermal overload protection includes a switching device (10), a temperature indicating device (Ds), a drive circuit (13) and a thermal monitoring circuit (14). The thermal monitoring circuit (14) is coupled across the temperature indicating device (Ds) and provides a...

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Bibliographische Detailangaben
Hauptverfasser:	KESSLER, SCOTT B, FRUTH, JOHN R
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES LIGHTING MEASURING MEASURING QUANTITY OF HEAT MEASURING TEMPERATURE MECHANICAL ENGINEERING PHYSICS TESTING TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR WEAPONS
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Beschreibung
Zusammenfassung:	An interface (100) for providing thermal overload protection includes a switching device (10), a temperature indicating device (Ds), a drive circuit (13) and a thermal monitoring circuit (14). The thermal monitoring circuit (14) is coupled across the temperature indicating device (Ds) and provides a shutdown signal to the drive circuit (13) when the temperature of the switching device (10) is above a predetermined temperature level as indicated by a temperature signal provided by the temperature indicating device (Ds). The drive circuit (13) responds to the shutdown signal by removing current sources and current sinks from a control terminal of the switching device (10) at which point leakage currents cause the switching device (10) to reduce a drive current to an inductive load (18).