The
Driving Cycle defines vehicle speed, road gradient and other parameters
either time- or distance-based. It's open format requires
Idenfiers to define the content of each column.
Important Notes
- For
distance-based cycles there is a minimum distance-step of 1[m]
required. The calculation will abort if larger steps are used.
- Time-based
cycles can be defined in any given time resolution, including variable
time steps. If the time identifier "<t>" is not used the data
will be interpreted in 1[s] resolution (1Hz).
Supported Identifiers
Identifier | Quantity | Unit | Description |
<s> | Distance | [m] | Travelled distance used for distance-based cycles. If <t> is also defined this column will be ignored. |
<t> | Time | [s] | Used for time-based cycles. If neither this nor the distance <s> is defined the data will be interpreted as 1Hz. |
<v> | Vehicle Speed | [km/h] | Required except for Engine Only Mode calculations. |
<grad> | Road Gradient | [%] | Optional. |
<stop> | Stopping Time | [s] | Required
for distance-based cycles. Not used in time based cycles. <stop>
defines the time the vehicle spends in stop phases. |
<Aux_xxx> | Auxiliary Supply Power | [kW] | Supply Power input for each auxiliary defined in the .vecto file where xxx matches the ID of the corresponding Auxiliary. ID's are not case sensitive and must not contain space or special characters. |
<n> | Engine Speed | [rpm] | If <n> is defined VECTO uses that instead of the calculated engine speed value. |
<gear> | Gear | [-] | Gear input. Overwrites the gear shift model. |
<Padd> | Additional Aux Power Demand | [kW] | This power input will be directly added to the engine power in addition to possible other auxiliaries. Also used in Engine Only Mode. |
<vair_res> | Air speed relative to vehicle | [km/h] | Only required if Cross Wind Correction is set to Vair & Beta Input. |
<vair_beta> | Wind Yaw Angle | [°] | Only required if Cross Wind Correction is set to Vair & Beta Input. |
<Pe> | Engine power | [kW] | Effective engine power at clutch. Only required in Engine Only Mode. Alternatively torque <Me> can be defined. Use <DRAG> to define motoring operation. |
<Me> | Engine torque | [Nm] | Effective engine torque at clutch. Only required in Engine Only Mode. Alternatively power <Pe> can be defined. Use <DRAG> to define motoring operation. |
Examples
The demo data provided with VECTO contains several .vdri files that may be used as template.
Example 1: Distance-based cycle with
Road Gradient and two
Auxiliaries
Example 2: Time-based cycle with Engine Speed,
Vair & Beta Input, one
Auxiliary and
Additional Aux Demand