- Brüel & Kjær accelerometers (10
mV/g output sensitivity, resonance frequency 50 kHz)
- Endress+Hauser Promass 80A coriolis effect
mass flow meter (liquid measuring range 0÷100
kg/h, gas measuring range 0÷3.1
Nm3/h, maximum working pressure 160 bar)
- Kistler 2629B capacitive Top Dead Centre
(TDC) sensor
- National Instruments Data acquisition
systems:
DAQ Card PCI-6133, 14 bit, 3 MSa/s
DAQ Card 6062 12 bit 500 kSa/s
Real-Time PXI 7030-6040E
PCI-6602 80 MHz Counter board
- Walbro MinJ400 programmable Electronic
Control Unit for injection and ignition real time control
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ENGINE TEST BED
Equipped with the most up to date
instruments and devices, the engine test bed allow to measure engine
torque and power, engine brake and indicated specific fuel consumption,
in-cylinder pressure, indicated mean effective pressure, friction mean
effective pressure, mass fraction burnt, knock onset and knock
intensity.
The following instruments are currently
employed:
- Schenck W130 eddy current dynamometer
(maximum braking power 130 kW, maximum speed 10000 rpm) equipped with
Borghi DCU2000 control system and strain gauge load cell
- Electronic throttle control system Borghi
SAT2000 - AT2000
- AVL piezoelectric in-cylinder pressure
sensors (0÷200
bar measuring range, maximum temperature 400 °C, frequency response 130
kHz)
- Agilent 54624A 100 MHz - 4 channels oscilloscope
- Labcell AFR2400 air-fuel ratio and spark
advance measurement and acquisition system (0.4<l<10) endowed of a UEGO
sensor
- Fiat 1242cc 8V bi-fuel engine (fuelled
with gasoline, natural gas, or LPG)
- Renault 1598cc 16V spark ignition engine
- Amarù-Finder BLW 80-2 Roots supercharger
(maximum pressure increase 900 mbar, maximum volumetric flow 480 m3/h)
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STEADY STATE FLOW
BENCH
The flow bench is used to determine fluid
dynamics properties of internal combustion engine parts and elements,
such as intake and exhaust duct discharge coefficients, swirl and
tumble turbulence intensities.
It is currently equipped with the following
instruments:
- SAVIO MICO 90/8
multi-stage centrifugal blower (maximum compression ratio 1.85, minimum
inlet pressure 55 kPa, maximum volumetric flow 1140 m3/h).
- Tekkal torque meter
for swirl or tumble intensity evaluation (max 150 mNm)
- Endress+Hauser
Prowirl 77F vortex flow meter (air flow 10÷160 l/sec)
- Druck piezoresistive
absolute pressure transducer (pressure range 0÷1 bar)
- High precision
poppet valve positioning system
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- ORMA EL1000 high precision scale for
gravimetric measurement (range 0÷1000
g)
-
Omega CN4116 PID temperature controller for engine intake air heaters
-
Measurement Specialties HTM2530LFL relative humidity and temperature
sensor
-
Tekkal Rotaplus C80 360 ppr optical incremental encoder (maximum
operative frequency 200 kHz)
-
Venturi flow meter
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CFR TEST BENCH
Octane rating measurements of both liquid
and gaseous fuels according to Motor (ASTM D2700 norm) and Research
(ASTM D2699 norm) methods can be performed. In-cylinder pressure
measurement and analysis can be carried out as well, with indicated
mean effective pressure determination and mass fraction burnt
evaluation; knock phenomena diagnosis and analysis. The CFR test bench
is equipped with the following instruments:
- CFR spark ignition engine model F4,
variable compression ratio (range 4.5-16), equipped with a standard
carburettor and two independent electronic injection systems (one for
liquid and one for gaseous fuel)
- National Instruments data acquisition
systems DAQ Card 6062 (12 bit, 500 kSa/s)
- Kistler in-cylinder pressure transducer
- Brüel & Kjær accelerometers
- Bronkhorst Mini-Coriflow
coriolis effect fuel mass flow meter (measuring range 0÷2 kg/h, maximum error
±0.2% of reading, maximum operating pressure 200 bar)
- Air-fuel ratio measurement and acquisition
system based on NGK UEGO sensor (0.88<l<1.12)
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