INTERNAL COMBUSTION ENGINE'S SYSTEMS OPERATION ANALYZER Russian patent published in 2007 - IPC G01M15/05 

FIELD: engine construction.

SUBSTANCE: analyzer can be used for diagnostics of internal combustion engine systems. Internal combustion engine system operation analyzer has starter current detector, moment of ignition pulse oscillator, comparator, frequency multiplier, coincidence unit, current average value indicator, inverter, starter's current minimal and maximal current amplitude peak detectors, voltage difference indicator, dc voltmeter and ammeter provided with current detector. First output of starter's current detector is connected with inputs of comparator directly and through inverter and first and second outputs of ignition moment pulse oscillator. Frequency multiplier is connected between second output of starter's 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 starters current detector and voltage difference indicator. Average current indicator is connected to third outputs of starter's current detector and of ignition moment pulse oscillator. Voltmeter is connected in parallel to input of starter's current detector. Current detector is mounted onto wire, which connects, plus output of battery with starter of engine to embrace wire with its clamps. Second and third current detectors, amplifier-former, first and second counters, sample-store circuit, memorizing capacitors, ignition plug state indicator and control switch are introduced into device additionally. Second current detector is mounted onto high-voltage wire, which goes from ignition distributor to plug of first cylinder. Third current detector is mounted onto high-voltage wire, which connects ignition coil with distributor. Output of second current detector is connected with rejection input of first counter through amplifier-former. Output of third current detector is connected with its count input and with sample-store circuit, to which circuit the memorizing capacitors are connected; number of capacitors corresponds to number of cylinders of engine. Output of sample-store circuit is connected with input of ignition plug state indicator. Counting input of indicator is connected with case through control switch. Outputs of indicator are connected with inputs of sample-store circuit.

EFFECT: widened number of parameters of system to be diagnosed without starting the engine.

1 dwg