CombinedFuelEconomy
Full qualified VSS Path: Vehicle.Powertrain.RangeExtender.CombinedFuelEconomy
Description: Combined fuel economy equivalent that accounts for both electric energy and fuel consumption.
Comment: This metric provides a unified measure of overall vehicle efficiency by converting electric energy consumption to a fuel-equivalent value and combining it with actual fuel consumption. The calculation typically follows regulatory standards (such as EPA MPGe) that define the equivalence between electrical energy and liquid fuel energy. For example, EPA defines 33.7 kWh as equivalent to one gallon of gasoline. This combined metric is useful for comparing EREV efficiency with conventional vehicles and understanding the overall energy cost of operation. The value is weighted based on the proportion of driving in CD versus CS modes.
flowchart LR Vehicle-->Powertrain Powertrain-->RangeExtender RangeExtender-->CombinedFuelEconomy

Eclipse Leda: Usage Example

In Eclipse Kuksa.VAL Databroker CLI:

$ databroker-cli
sdv.databroker.v1 > connect
[connect] OK
sdv.databroker.v1 > get Vehicle.Powertrain.RangeExtender.CombinedFuelEconomy
[get]  OK
Vehicle.Powertrain.RangeExtender.CombinedFuelEconomy: ( NotAvailable )
sdv.databroker.v1 > set Vehicle.Powertrain.RangeExtender.CombinedFuelEconomy 0
[set]  OK

Digital Auto: Playground

playground.digital.auto provides an in-browser, rapid prototyping environment utilizing the COVESA APIs for connected vehicles.

Vehicle Model Direct link to Vehicle Signal
ACME Car (EV) v0.1 Vehicle.Powertrain.RangeExtender.CombinedFuelEconomy

Data Type & Unit
Path Vehicle.Powertrain.RangeExtender.CombinedFuelEconomy VSS: Addressing nodes
Data type float VSS: Datatypes
Unit km/l VSS: Units
Label kilometers per liter
Description Distance per volume measured in kilometers per liter VSS: Sensors & Actuators
Domain distance-per-volume

Note: The float datatype is a floating point number which technically allows values between -3.4e ^ -38 and 3.4e ^ 38

Signal Information

The vehicle signal Vehicle.Powertrain.RangeExtender.CombinedFuelEconomy is a Sensor.

The vehicle signal Vehicle.Powertrain.RangeExtender.CombinedFuelEconomy is a Signal.

UUID

Each vehicle signal is identified by a Universally Unique Identifier (UUID)

The UUID for Vehicle.Powertrain.RangeExtender.CombinedFuelEconomy is 5844045f06595086936bb104347e768a

Feedback

Do you think this Vehicle Signal specification needs enhancement? Do you want to discuss with experts? Try the following ressources to get in touch with the VSS community:
Enhancement request Create COVESA GitHub Issue
Join COVESA www.covesa.global
Discuss VSS on Slack w3cauto.slack.com
VSS Data Experts on Google Groups covesa.global data-expert-group

About VSS

The Vehicle Signal Specification (VSS) is an initiative by COVESA to define a syntax and a catalog for vehicle signals. The source code and releases can be found in the VSS github repository.

Supported datatypes

The following is a list of VSS supported built-in datatypes:

Name Type Min Max
uint8 unsigned 8-bit integer 0 255
int8 signed 8-bit integer -128 127
uint16 unsigned 16-bit integer 0 65535
int16 signed 16-bit integer -32768 32767
uint32 unsigned 32-bit integer 0 4294967295
int32 signed 32-bit integer -2147483648 2147483647
uint64 unsigned 64-bit integer 0 2^64 - 1
int64 signed 64-bit integer -2^63 2^63 - 1
boolean boolean value 0/false 1/true
float floating point number -3.4e -38 3.4e 38
double double precision floating point number -1.7e -300 1.7e 300
string character string n/a n/a

Min, max and default values defined in a Vehicle Signal Specification must be in the supported range of the data type.