Signal disabling engine diagnosing apparatus
Power contribution measurement system for internal combustion engines
Engine test and display apparatus
Micro-computer system for control and diagnosis of motor vehicle functions
Spark plug load testing for an internal combustion engine Patent #: 4291383
ApplicationNo. 06/686203 filed on 12/26/1984
US Classes:324/397, By shorting the plug to ground to indicate spark plug condition324/384, Using plural tests in a conventional ignition system324/402, Apparatus for coupling a measuring instrument to an ignition system701/115, Specific memory or interfacing device73/116MOTOR AND ENGINE TESTING
ExaminersPrimary: Eisenzopf, Reinhard J.
Assistant: Solis, Jose M.
Attorney, Agent or Firm
International ClassesF02P 17/00 (20060101)
F02P 17/08 (20060101)
G01M 15/04 (20060101)
F02P 9/00 (20060101)
AbstractAn ignition system interface for interposing an automotive combustion engine having a computer controlled ignition with an engine test analyzer. The interface receives timing signals from the ignition computer and generates modified timing based on command from the engine analyzer. Modified timing signals are transmitted to the coil ignition module which fires the spark plugs of the engine. The analyzer may command a shorting of the cylinder which causes the interface to modify the timing at the appropriate time for inhibiting a selected cylinder from firing. Secondary signals from the spark plugs are received by the interface and converted to a proper voltage waveform for recognition by the engine analyzer. The cylinder No. 1 is monitored by the interface and converted to a proper waveform for transmission to the analyzer.