Fuel & energy

INSTANTANEOUS_FUEL_ECONOMY

What it is

Instantaneous Fuel Economy in L/100km.

This property must communicate the instantaneous fuel economy of the vehicle in units of L/100km. The property's value is independent of DISTANCE_DISPLAY_UNITS, FUEL_VOLUME_DISPLAY_UNITS, and FUEL_CONSUMPTION_UNITS_DISTANCE_OVER_VOLUME property i.e. this property must always communicate the value in L/100km.

For the EV version of this property, see INSTANTANEOUS_EV_EFFICIENCY.

How the ID is built

A property ID is a 32-bit value packing four fields. Reading 0x11600211 apart:

Field	Mask	Value	Means
Group	0xf0000000	0x10000000	SYSTEM
Area	0x0f000000	0x01000000	GLOBAL
Type	0x00ff0000	0x00600000	FLOAT
Ordinal	0x0000ffff	0x00000211	0x211

Reading it from an app

CarPropertyManager mgr = (CarPropertyManager)
        car.getCarManager(Car.PROPERTY_SERVICE);

mgr.registerCallback(callback,
        VehiclePropertyIds.INSTANTANEOUS_FUEL_ECONOMY,
        CarPropertyManager.SENSOR_RATE_ONCHANGE);

This property is read-only — writes are rejected. It changes continuously, so subscribe at a sample rate rather than polling.