8. Indices

8.1. 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

GS Task-Force

The Gear-shift Task-force of the GRPE. It is the team of automotive experts drafting the gear-shifting strategy for vehicles running the WLTP cycles.

WLTC

The family of pre-defined driving-cycles corresponding to vehicles with different PMR. Classes 1,2, 3a & 3b are split in 2, 4, 4 and 4 parts respectively.

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”.

pandas-model

The container of data that the gear-shift calculator consumes and produces. It is implemented by wltp.pandel.Pandel as a mergeable stack of JSON-schema abiding trees of strings and numbers, formed with sequences, dictionaries, pandas-instances and URI-references.

JSON-schema

The JSON schema is an IETF draft that provides a contract for what JSON-data is required for a given application and how to interact with it. JSON Schema is intended to define validation, documentation, hyperlink navigation, and interaction control of JSON data. You can learn more about it from this excellent guide, and experiment with this on-line validator.

JSON-pointer

JSON Pointer(RFC 6901) defines a string syntax for identifying a specific value within a JavaScript Object Notation (JSON) document. It aims to serve the same purpose as XPath from the XML world, but it is much simpler.

8.1.1. Index