wltp: A wltc gear-shifts calculator

Version:0.0.8-alpha.2 Home:https://github.com/ankostis/wltp Documentation:https://wltp.readthedocs.org/ PyPI:https://pypi.python.org/pypi/wltp TravisCI:https://travis-ci.org/ankostis/wltp Copyright:2013-2014 European Commission (JRC-IET) License:EUPL 1.1+

A calculator of the gear-shifts profile for light-duty-vehicles (cars) according to UNECE draft of the WLTP.

Figure 1: WLTP cycle for class-3b Vehicles

Important

This project is still in alpha stage. Its results are not considered “correct”, and no approval procedure should rely on them. Some of the known deficiencies are described in Changes.

• 1. Introduction
  • 1.1. Install
  • 1.2. Python usage
  • 1.3. Cmd-line usage
  • 1.4. IPython usage
• 2. Getting Involved
  • 2.1. Development
  • 2.2. Specs & Algorithm
    • 2.2.1. Cycles
  • 2.3. Development team
• 3. Code reference
  • 3.1. Module: wltp.experiment
    • 3.1.1. Vectors
  • 3.2. Module: wltp.model
• 4. Changes
  • 4.1. Known deficiencies
  • 4.2. TODOs
  • 4.3. Changelog
    • 4.3.1. v0.0.8-alpha, 04-Aug-2014
    • 4.3.2. v0.0.7-alpha, 31-Jul-2014: 1st public
    • 4.3.3. v0.0.6-alpha, 5-Feb-2014
    • 4.3.4. v0.0.5-alpha, 18-Feb-2014
    • 4.3.5. v0.0.4.alpha, 18-Jan-2014
    • 4.3.6. v0.0.3_alpha, 22-Jan-2014
    • 4.3.7. v0.0.2_alpha, 7-Jan-2014
    • 4.3.8. v0.0.1, 6-Jan-2014: Alpha release
    • 4.3.9. v0.0.0, 11-Dec-2013: Inception stage
• 5. Indices
  • 5.1. Glossary
  • 5.2. Index

Glossary

WLTP

The Worldwide harmonised Light duty vehicles Test Procedure, a GRPE informal working group

UNECE

The United Nations Economic Commission for Europe, which has assumed the steering role on the WLTP.

GRPE

UNECE Working party on Pollution and Energy – Transport Programme

GTR

Global Technical Regulation

WLTC

The family of the 3 pre-defined driving-cycles to use for each vehicle depending on its PMR. Classes 1,2 & 3 are split in 2, 4 and 4 parts respectively.

PMR

The rated_power / unladen_mass of the vehicle

Unladen mass

UM or Curb weight, the weight of the vehicle in running order minus the mass of the driver.

Test mass

TM, the representative weight of the vehicle used as input for the calculations of the simulation, derived by interpolating between high and low values for the CO₂-family of the vehicle.

Downscaling

Reduction of the top-velocity of the original drive trace to be followed, to ensure that the vehicle is not driven in an unduly high proportion of “full throttle”.