Vehicle Energy Consumption calculation TOol - VECTO
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1 Vehicle Energy Consumption calculation TOol - VECTO Dr Dimitrios Savvidis European Commission DG Unit C4: Road Transport
2 Simulation tool to calculate both, fuel consumption and CO 2 emissions from the whole vehicle
3 Vecto development - VECTO has been developed by the Commission (DG CLIMA leading, JRC) with TUG support over the last seven years - ACEA, OEMs and component manufacturers have been also involved and provided key input and test vehicles
4 Tests Tests, on trucks, performed in demonstrated VECTO's accuracy and reliability. The software was further tested and improved in 2015 during the "Pilot Phase - PP". The tool is now broadly ready to be the backbone of certification.
5 VECTO - Structure
6 Model structure - Four main modules
7 Model structure - Four main modules
8 Simulation of engine power
9 Simulation's steps Identification of the vehicle Allocation of generic data Convert distance based cycle to time based Apply driver's assist functions (overspeed, Eco-Roll, etc.) Vehicle longitudinal dynamics Generic driver gear-shift model to compute rpm Interpolation from fuel map, apply "WHTC correction factors" Information for customer Reporting for TAA Data for monitoring purposes 9
10 VECTO's modes Declaration mode where all generic data and the test cycle are allocated automatically as soon as the vehicle class is defined. Engineering mode where the user can select and change all input data to allow recalculation of test data e.g. for model validation.
11 VECTO output In the declaration mode FC and CO 2 emissions are automatically calculated for all test cycles allocated to the vehicle for average payload and full load. Results given in g/km, g/cm 3 -km, g/ton-km or g/pass-km. Other metrics can be also considered at a later stage
12 VECTO Graphical User Interface (GUI)
13
14
15
16
17
18 Mission profiles Trucks - Urban delivery - Regional delivery - Long haul - Construction - Municipal utility Buses and coaches - City-bus heavy urban - City-bus urban - City-bus suburban - Interurban bus - Coach
19 Long Haul (2015 update)
20 Regional delivery (2016 update)
21 Municipal cycle (2017 update)
22 Suburban cycle (2016 update)
23 Input data: Aerodynamic drag - RRC Constant speed test (at 2 speeds) Rim torque meter Anemometer Correction for gradient and for vehicle speed variations Correction for ambient P and T F = F0 + Cd * A * v² *r/2 Important tire and vehicle conditioning for accurate Cd*A results. RRC calculated in these tests not to be used. Official value to be used for monitoring purposes
24 Vehicle groups for vehicles of category N
25 Busses classification
26 "Proof of concept" activity Scope: - Prove that simulation based monitoring can deliver results that accurately reflect fuel consumption and performance of modern HDVs - Verify the validity and soundness of the approach - Extensive measurements concluded in February Joint EC-ACEA activity Included Two HDVs (DAF and Daimler) Proving ground testing (Iveco s circuit) Chassis dyno testing (JRC) On road / PEMS testing (JRC) Engine test bed testing (JRC)
27 Torque measurement Zeroing Positioning / speed Wind speed and wind angle Ambient temperature, humidity, pressure Fuel consumption Vehicle mass Wheel rim (Actros) Axis (CF75) Daily basis to eliminate drift High precision GPS (Actros) Sensors at fixed points on ground (CF75) Ultrasonic Wind Anemometer (both) Weather station installed on board (both) OEM integrated flow meter (both) AVL KMA flowmeter (where possible) JRC s balance Equipment used
28 Test vehicles
29 Test Route
30 Buses & coaches Pre Pilot Phase (PPT)
31 JRC's test facility (VELA 7)
32 GUI του VECTO pre-processing tool
33 Reference fuels for testing
34 Standard bodies and standard trailers delta CdxA for trailer operation in long haul [m²] name curb mass [kg] max gross mass [kg] as first trailer as second trailer (EMS) axle count [- ] wheels dimension tyre RRC [N/kN] cargo volume [m³] B B B B B T /75 R17.5 T /65 R (mid of energy class "C") ST /65 R Dolly /70 R
35 EMS
36 Thank you for your attention! - I will be happy to address your questions - More info can be found at: avy - Contact details: Dimitrios SAVVIDIS: dimitrios.savvidis@ec.europa.eu
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