Gearbox Editor


gbx

Description

The Gearbox File (.vgbx) defines alls gearbox-related input parameters like gear ratios and transmission loss maps.
See Gear Shift Model for details.


Relatve File Paths

It is recommended to define relative filepaths. This way the Job File and all input files can be moved without having to update the paths.
Example: "Gears\Gear1.vtlm" points to the "Gears" subdirectory of the Gearbox File's directoy.

VECTO automatically uses relative paths if the input file (e.g. Shift Polygons File) is in the same directory as the Gearbox File. (The Gearbox File must be saved before browsing for input files.)


Main Gearbox Parameters

Make and Model
Free text defining the gearbox model, type, etc.

Transmission Type
Depending on the transmission type some options below are not available. The following types are available:
  • Manual Transmission (MT)
  • Automated Manual Transmission (AMT)
  • Automatic Transmission (AT)
  • Custom
Note: The types AT and Custom are not available in Declaration Mode.

Inertia [kgm2]
Rotational inertia of the gearbox (constant for all gears).

Traction Interruption [s]
Interruption during gear shift event.


Gears

Use the add and remove buttons to add or remove gears form the vehicle. Doubleclick entries to edit existing gears.


Gear shift parameters

Allow shift-up inside polygons
See Gear Shift Model.

Skip Gears
See Gear Shift Model.

Torque Reserve [%]
This parameter is required for the "Allow shift-up inside polygons" and "Skip Gears" options.

Minimum shift time [s]
Limits the time between two gear shifts in whole seconds. This rule will be ignored if rpms are too high or too low. Note that high values may cause high rpms during acceleration.

Start Gear
In order to calculate an appropriate gear for vehicle start (first gear after vehicle standstill) a fictional load case is calculated using a specified reference vehicle speed and reference acceleration together with the actual road gradient, transmission losses and auxiliary power demand. This way the start gear is independent from the target speed. VECTO uses the highest possible gear which provides the defined torque reserve.


Chart Area

The Chart Area displays the Shift Polygons Input File (.vgbs) for the selected gear.


Torque Converter

The Torque Converter Model is still in development.

Inertia [kgm2]
Rotational inertia of the engine-side part of the torque converter. (Gearbox-side inertia is not considered in VECTO.)


Controls

New file
Create a new empty .vgbx file

open Open existing file
Open an existing .vgbx file

save Save current file

SaveAs Save file as...

sendto Send current file to the VECTO Editor
Note: If the current file was opened via the VECTO Editor the file will be sent automatically when saved.

Open file browser.

Open file (see File Open Command).

OKSave and close file
If necessary the file path in the VECTO Editor will be updated.

Cancel Cancel without saving