SIMULATION SOLUTIONS TEST SYSTEM SOLUTIONS Electrification atterette Eotorette oerElectronic ette oonent ette onteirtal tete Enineette Enoine ette ealieette rielineette elane ette Eiionette anertification eicleette acinette TESTING EQUIPMENT naoeter anctator icleete etellecanic anontroloo eiaonitionin Consumption Measurement nectionetin otion eareent Eiionnali aneareent neicle eareent TESTING EQUIPMENT SIMULATION TOOLS TESTING TOOLS CUSTOMER SERVICES Unique Variety of Measurement Principles 1 Fuel supply connections (4) 2 Damping device 3 Capacitive sensor 4 Tara weight / 130 5 Blade spring 6 Measurement beam 7 Calibrating weight 8 Measuring vessel 2 3 4 5 6 7 8 1 GRAVIMETRIC (FUEL BALANCE) The fuel consumed by the engine is taken from a continuously weighted measurement vessel which has the same properties as the vehicle tank. The detection of the weight of the fuel is carried out with a capacitive displacement sensor connected to the measurement vessel by means of a beam. A calibration weight is used to perform the accuracy testing and calibration procedures in accordance with ISO 9001. Calibration takes place in a fully automatic manner within a few minutes and is integrated by default into the AVL Fuel Balance. PLU MEASUREMENT PRINCIPLE The PLU positive displacement meter combines a servo-controlled gear counter with a dynamic piston sensor. A gear meter (2) driven by a servo motor (7) with encoder (8) defi nes a geometric volume to pulse frequency ratio when gear rotation is adjusted to media ow. A ypass 5 ensures zero pressure difference p 0 etween inlet and outlet, preventing leakage ow. Flow changes immediately displace a zero-friction piston (4) in either direction. A piston position sensor (3) and a servo controller (9) provide a fast gear speed control loop keeping the piston centered. Sensor C1 t Coriolis Force Flow Sensor C2 Signal Density Mass Flow C1 C2 CORIOLIS Fuel passes through a U-shaped tube which vibrates at its natural frequency. This frequency is proportional to the fuel density which, in addition to the mass ow, is a separate measurement variable and, thus, allows for the output of volumetric measurement values. The time lag of the vibration frequency C1 to C2 is proportional to the mass ow. 6 7 10 9 8 1 2 3 5 1 Inlet 2 Gear meter 3 Piston sensor 4 Piston 5 Bypass 6 Outlet 7 Servo motor 8 Encoder 9 Controller 10 Signal Output 4
Solutionskatalog_2017_E
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