- injector resistance
measurement of the equivalent resistance seen across the coil of the injector
- power dissipation
measurement of the operating voltage and current draw during an injector pulse under controlled conditions
- operating voltage
determination of the minimum and maximum voltage values at which the injector is able to satisfy specific performance criteria
- static current
measurement of minimum current required to cycle the injector from fully closed to fully open, and then the minimum holding current required to keep the injector fully open afterwards
- preconditioning
break-in of a new injector unit at gradually increasing pressure, temperature, and frequency
- static flow rate
measurement of the maximum flow rate through the injector when it is energized in the fully open position
- operating temperature
determination of the minimum and maximum temperature limits at which the injector is able to satisfy specific performance criteria
- high/low temperature wake-up
measurement of injector performance degradation when it is soaked in extreme temperature conditions, and then operated at specific conditions
- thermal shock
measurement of injector performance when unit is energized after specific positive/negative thermal gradients
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- dynamic flow rate
measurement of the flow rate through the injector when it is operated at various supply pressures, temperatures, frequencies, and pulse widths
- static leakage
measurement of the pressure decay or discharge flow rate over time when the injector is de-energized, under a specific supply pressure
- dynamic setpoint flow
measurement of the mg/injection delivery by the injector when it is operated at its intended dynamic setpoint conditions
- linearity deviation
difference between the actual measured dynamic flow rate and the calculated maximum theoretical flow rate at a specific pulse width
- flow range
ratio of the maximum dynamic flow and the minimum dynamic flow
- injection signature
measurement of the opening (TON) and closing (TOFF) times for a single injection pulse
- acoustic noise
measurement of sound pressure level (SPL) when injector is fired at various supply pressures, frequencies, and pulse widths
- contamination testing
monitoring of injector performance when exposed to physical contaminants of controlled size, water, salt solutions, etc.
- durability test
measurement of performance signature after long term testing of injector unit under specific controlled conditions
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