Distributorless ignition system interface for engine diagnostic testers
This patent describes an interface for use with a test engine analyzer to analyze a computer controlled automotive engine having an electronic control module which develops timing signals to a coil ignition module which fires the spark plugs of the engine, the timing signals carrying dwell information. The interface comprises: input means for receiving timing signals from the electronic control module; output means for transmitting timing signals to the coil ignition module; cylinder clock modification circuitry for receiving the timing signals from the input means and for passing timing signals to the output means. The cylinder clock modification circuitry generates a modified timing signal in response to an inhibit command signal for transmission to the coil ignition module. The modified timing signal carries dwell information of a dwell period insufficient to fire a spark plug; and power balance command circuitry for receiving a cylinder inhibit command from the engine analyzer and responsively generating the inhibit command signal, whereby a cylinder of the engine is inhibited from firing.
- Assignee:
- NOV; NOV-87-048494; EDB-87-064410
- Patent Number(s):
- US 4644284
- OSTI ID:
- 6739748
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330101* -- Internal Combustion Engines-- Spark-Ignition
COMMUNICATIONS
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
CYLINDERS
DATA ACQUISITION
DATA TRANSMISSION
ELECTRIC COILS
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ENGINES
EQUIPMENT
HEAT ENGINES
IGNITION
IGNITION SYSTEMS
INTERNAL COMBUSTION ENGINES
PERFORMANCE TESTING
SIGNALS
SPARK IGNITION ENGINES
TESTING
TIMING CIRCUITS
VEHICLES