Vehicle Energy Consumption calculation TOol - VECTO · Vehicle Energy Consumption calculation TOol...
Transcript of Vehicle Energy Consumption calculation TOol - VECTO · Vehicle Energy Consumption calculation TOol...
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Vehicle Energy Consumption calculation TOol - VECTO
Dr Dimitrios Savvidis European Commission
DG Climate Action Unit C4: Road Transport
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Simulation tool to calculate both, fuel consumption and
CO2 emissions from the whole vehicle
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- 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
Vecto development
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Tests, on trucks, performed in 2012-2014 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.
Tests
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VECTO - Structure
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Model structure - Four main modules
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Model structure - Four main modules
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Simulation of engine power
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9
• 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
Simulation's steps
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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.
VECTO's modes
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In the declaration mode FC and CO2 emissions are automatically calculated for all test cycles allocated to the vehicle for average payload and full load.
Results given in g/km, g/cm3-km, g/ton-km or g/pass-km. Other metrics can be also considered at a later stage
VECTO output
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VECTO Graphical User Interface (GUI)
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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
Mission profiles
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Long Haul (2015 update)
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Regional delivery (2016 update)
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Municipal cycle (2017 update)
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Suburban cycle (2016 update)
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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
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Vehicle groups for vehicles of category N
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Busses classification
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"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 2013 - 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)
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Equipment used Torque
measurement
Wheel rim (Actros)
Axis (CF75)
Zeroing Daily basis to eliminate drift
Positioning / speed
High precision GPS (Actros)
Sensors at fixed points on ground
(CF75) Wind speed and
wind angle
Ultrasonic Wind Anemometer (both)
Ambient
temperature,
humidity, pressure
Weather station installed on board (both)
Fuel consumption
OEM integrated flow meter (both) AVL KMA flowmeter (where
possible) Vehicle mass JRC’s balance
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Test vehicles
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Test Route
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Buses & coaches Pre Pilot Phase (PPT)
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JRC's test facility (VELA 7)
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GUI του VECTO pre-processing tool
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Reference fuels for testing
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Standard bodies and standard trailers
name curb mass
[kg] max gross mass
[kg]
delta CdxA for trailer operation in long haul [m²]
axle count [-]
wheels dimension
tyre RRC [N/kN]
cargo volume [m³] as first trailer
as second trailer (EMS)
B1 1600 - - - - - 36.5
B2 1900 - - - - - 45.2
B3 2000 - - - - - 47.7
B4 2100 - - - - - 49.4
B5 2200 - - - - - 51.9
T1 3400 10500 1.3 - 2 235/75 R17.5
5.5 (mid of energy class "C")
39.8
T2 5400 18000 1.5 1.5 2 385/65 R22.5 49.5
ST1 7500 24000 0 2.1 3 385/65 R22.5 91
Dolly 2500 12000 - - 2 315/70 R22.5 0
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EMS
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- I will be happy to address your questions - More info can be found at: http://ec.europa.eu/clima/policies/transport/vehicles/heavy - Contact details: Dimitrios SAVVIDIS: [email protected]
Thank you for your attention!