Introduction

The aim of the JR-Shift is obtain the Required Engine Speeds, the Available Powers, the Required Vehicle Speeds and the Gears for the whole WLTC based on the vehicle characteristics. The model should allow accurate calculation of final trace and the operating conditions of the engine.

Overview

The calculator accepts as input an excel file that contains the vehicle’s technical data, along with parameters for modifying the execution WLTC cycle, and it then spits-out the gear-shifts of the vehicle and the others parameters used during the obtaining of these. It does not calculate any CO2 emissions.

Input File

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The input file of the GEARSHIFT tool is an excel file, structured in different sheets.

  • Case sheet: The case sheet contains a list of cases that the tool will run.

  • Vehicle sheet: The vehicle sheet contains a list of vehicles along with their characteristics.

  • Engine sheet: The engine sheet contains the vehicle’s full load curves.

  • Gearbox Ratios sheet: The gearbox ratios sheet contains the gearbox transmission ratios.

Quick-Start

Cmd-line usage

The command-line usage below requires the Python environment to be installed, and provides for executing an experiment directly from the OS’s shell (i.e. cmd in windows or bash in POSIX), and in a single command. To have precise control over the inputs and outputs

$ gearshift --help                                                  ## to get generic help for cmd-line syntax
$ gearshift demo                                                    ## to get demo input file
$ gearshift run "path_input_file" -O "path_to_save_output_file"     ## to run gearshift tool