Loss of input signal detection and response system for use with distributorless ignition systems
This patent describes a distributorless ignition system suitable for use with: an engine; engine position sensing means for providing a PIP signal relating to crankshaft location information for the engine, and a CID signal relating to identification of a particular cylinder in the engine; and electronic engine control means for receiving the PIP and CID signals and for providing a SPOUT signal containing spark advance/retard and dwell information to the distributorless ignition system; an improvement comprising: (a) SPOUT low detection means for detecting when the SPOUT signal faults low and for causing the PIP signal and the CID signal to be operably substituted therefore, and (b) SPOUT signal delay means for receiving the SPOUT signal and for providing a delayed SPOUT signal that comprises the SPOUT signal as delayed a predetermined period of time; wherein the SPOUT low detection means receives and monitors the delayed SPOUT signal to detect when the delayed SPOUT signal, and hence the SPOUT signal, has faulted low.
- Assignee:
- Motorola, Inc., Schaumburg, IL
- Patent Number(s):
- US 4658786
- OSTI ID:
- 6635670
- Country of Publication:
- United States
- Language:
- English
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