INTERNAL COMBUSTION ENGINE OPERATION ANALYZER Russian patent published in 2006 - IPC G01M15/00 

FIELD: engine construction.

SUBSTANCE: analyzer can be used for measuring parameters of internal combustion engine systems and for diagnosing internal combustion engines. Internal combustion engine system operation analyzer has starter current detector, time of ignition pulse generator, comparator, starter current frequency multiplier, coincidence unit with two inputs, current average meaning indicator, inverter, peak detectors for signal of maximal and minimal meanings of starter current amplitude, voltage difference inductor, dc voltmeter and ammeter provided with current detector. First output of starter current detector and first and second outputs of ignition moment pulse generator are connected with inputs of comparator directly and through inverter. Frequency multiplier is connected between second output of starter current detector and input of coincidence unit. The other input of coincidence unit is connected with output of comparator. Peak detectors are connected between second output of starter current detector and voltage difference indicator. Current average meaning indicator is connected with third outputs of starter current detector and ignition moment pulse generator. Dc voltmeter is connected in parallel to input of starter current detector. Current detector is installed onto wire, which connects plus output of battery with starter of engine to embrace its wire with terminals. Analyzer has the following units introduced additionally: integrator with voltage detector and with two inputs - summing one and subtracting one, voltmeter connected in parallel to output of integrator, time relay with two pairs of contact and control lamp. Voltage detector is mounted onto high-voltage wire of ignition coil to embrace it with terminals. Output of voltage detector is connected in turn through one pair of contacts of time relay with summing and subtracting inputs of integrator. Second pair of contacts of time relay is connected in parallel with load resistor of input transistor of ignition moment pulse generator.

EFFECT: bigger number of diagnosed parameters of ignition system.

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