- throttle position sensor
calibration of TPS output, including correlation of positive and negative slope outputs for dual configurations, cross-over detection, and saturation points detection
- driver setup
adjustment of H-bridge control of closed loop voltage output to maintain ETB at a constant flap angle
- default position setup
calibration of the default no-load position of the ETB valve
- mechanical stop setup
learning and validation of the position of upper and lower mechanical stops (blade angle measurement)
- electrical stop setup
learning and validation of the electrical upper and lower endpoints
- actuation torque
measurement of the torque required to actuate the ETB valve blade under various load conditions
- micro-linearity test
measurement of the deviation of the actual TPS output (degree) from the ideal slope point at that angle in small degree increments
- hysteresis test
comparison of TPS output during opening and closing cycles under varying load conditions
- heavy acceleration response
measurement of ETB response under maximum driver output voltage
- ignition response
measurement of ETB response to a simulated ignition profile
- idle return response
measurement of ETB response to returning to idle position under various controlled conditions
- unpowered response
measurement of ETB response to returning to default position when power is removed to the unit
- high/low temperature wake-up
measurement of performance degradation when ETB unit is soaked in extreme temperature conditions, and then cycled through a predetermined profile
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- power consumption
measurement of the applied voltage and current draw of the electric motor actuator under various conditions
- response test
measurement of blade angle vs. time period when valve is cycled from any positions between the lower and upper electrical stops, at varying voltages
- resolution test
measurement of the smallest change in blade angle based on the driver voltage output
- airflow progression
plot of the effective flow rate vs. percent opening
- leakage test
measurement of total air flow at the default position under a specific pressure gradient
- default position actuation
measurement of blade response to returning to the default position under varying voltage and temperature
- thermal shock
measurement of ETB performance when unit is cycled through a profile after specific positive/negative thermal gradients
- thermal aging
monitoring of performance degradation during long term cycling through various temperature profiles
- oscillation test
monitoring of ETB behavior during long term cycling between lower and upper electrical limits at a fixed frequency
- acoustic noise
measurement of sound pressure level (SPL) when ETB is cycled through full travel range
- contamination testing
monitoring of ETB behavior when exposed to physical blockage, fuel, ice, water, moisture, dust, snow, salt, grime, etc.
- durability & endurance
measurement of performance degradation during long term ETB testing under controlled voltage and temperature
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