Analyzer for transistor ignition system
First Claim
1. A testing apparatus for an electronic ignition system, this ignition system having an ignition coil with a spark output, an electronic control unit connected to said coil for controlling said coil output and an electric sensor connected to said electronic control unit for controlling said electronic control unit operation, comprising:
- circuit means having a single pair of input probes one of which being the active probe and the other the ground probe for alternate connection to said electric sensor, said electronic control unit and said ignition coil for providing both static and dynamic substitute signals thereto via said pair of probes for determining via "go", "no-go" display components included therein the condition of operation, said circuit including reverse polarity protection means, and selection means whereby continuity, isolation and impedance testing can be selectively conducted; and
spark indicator means connectable between said ignition coil output and ground in conjunction with said connection of said circuit means to said ignition coil for providing a signal indication of the operation of said ignition coil.
9 Assignments
0 Petitions
Accused Products
Abstract
A simplified, electronic circuitry, testing apparatus for performing voltage, continuity, open circuit or dynamic signal substitution testing of each individual major component within an automotive-type transistor ignition system preferably having a multi-function control for connecting a single pair of test probes to any of various test circuitry subcircuits thereof, a signal generator may be included therein, a plurality of discrete display components integral to the test subcircuits may display test results, this testing apparatus being capable of being powered by the electrical power source for the engine ignition system and preferably containing safety devices for preventing electrical damage to the ignition system under test or to the testing apparatus itself; preferably a separate adapter component and a separate spark indicator component which establishes a precise test spark gap may be connected as part of the testing apparatus.
25 Citations
14 Claims
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1. A testing apparatus for an electronic ignition system, this ignition system having an ignition coil with a spark output, an electronic control unit connected to said coil for controlling said coil output and an electric sensor connected to said electronic control unit for controlling said electronic control unit operation, comprising:
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circuit means having a single pair of input probes one of which being the active probe and the other the ground probe for alternate connection to said electric sensor, said electronic control unit and said ignition coil for providing both static and dynamic substitute signals thereto via said pair of probes for determining via "go", "no-go" display components included therein the condition of operation, said circuit including reverse polarity protection means, and selection means whereby continuity, isolation and impedance testing can be selectively conducted; and spark indicator means connectable between said ignition coil output and ground in conjunction with said connection of said circuit means to said ignition coil for providing a signal indication of the operation of said ignition coil. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for testing an electronic ignition system, which system includes an ignition coil for delivering ignition current, said coil having primary and secondary windings, an electronic control unit connected for pulsed operation of said ignition coil, an electric sensor connected to actuate said electronic control unit, and a battery to power said ignition system, said testing apparatus comprising:
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ignition current indicator means for rendering an audio-visual indication of said ignition coil delivered ignition current, said indicator means being connectable to said ignition coil secondary winding and containing a predetermined fixed air gap established by the distance between a pair of abuttment shoulders thereof; a pair of electrical connections connectable across said battery; reverse polarity protection means connected in series with one of said electrical connections; and circuit means including an oscillator and a pair of test probes for selectively performing static circuit tests and dynamic circuit tests, said circuit means being connected to said pair of electrical connections.
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9. Apparatus for testing of components of an electronic ignition system, which system includes an ignition coil for delivering ignition current, said coil having a primary and a secondary winding, an electronic control unit connected to pulse operate said ignition coil, an electric distributor sensor connected to actuate the pulse operation of said electronic control unit and a battery to power the operation of said system components and battery connections, the input and output terminals of each component and ground being defined as test points of said system, said testing apparatus comprising:
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a pair of power leads suitable of respective connection to the positive and negative terminals of said battery, one of said battery terminals being connected to ground; a pair of test probes being suitable of respective connection to said system test points, one of said test probes being designated as common and connected with said power lead connected to ground; means for providing reverse polarity protection, said reverse polarity protection means being series connected into said power lead not connected to ground; a switch operable to a plurality of alternative positions to select alternative continuity, isolation and impedance tests; and a plurality of electric subcircuits each capable of performing at least a different one of said alternative tests, said subcircuits each containing current polarity components including light emitting diodes, the energization of which indicating a "go", "no-go" display of a test result, each said light emitting diode turn on voltage being an integral part of each said subcircuit test operation as well as display operation, said subcircuits each being connected at a node with said common test probe, and alternatively, with the other power lead and the other test probe through said switch. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification