The engine elements listed below are important to motor vehicles, yachts, boats, planes, and helicopters. When combined with other extensions such as gpx_pvt / gpx_imu / gpx_met / gpx_air / gpx_sea, every common gauge and indicator on yachts, boats, planes and helicopters can be represented by GPX.
| Name | Values | Description |
|---|---|---|
<ach id="n"> |
>= 0 | Tachometer for engine / rotor / propeller for revolutions per minute (RPM). See RPM in NMEA 0183 - only record when status “A” |
<trim id="n"> |
0 to 100 | Propeller pitch as a percentage of the maximum (%). See RPM in NMEA 0183 - only record when status “A” |
<torq id="n"> |
>= 0 | Torque from engine in Newton metres (Nm) |
<temp id="n"> |
Temperature of cylinder head / exhaust gas / carburetor / oil / coolant in degrees centigrade (° C) | |
<pressure id="n"> |
>= 0 | Pressure for boost / vacuum / oil / coolant / fuel in kilopascals (kPa) |
<level id="n"> |
>= 0 | Amount of fuel / oil in litres (L) |
<volts id="n"> |
>= 0 | Battery level in volts (V) |
<amps id="n"> |
>= 0 | Battery current which may be negative (charging) or positive (discharging) in amps (A) |
n.b. The “id” attribute could be useful in all of the other extensions where multiple sensors are quite possible (and likely).
All of these engine measurements may result in multiple values for a single moment in time, which is why elements have an “id” attribute.
<tach> might be required for boats with twin outboard motors<temp> might be required for oil temperature and coolant temperature<level> might be required for port and starboard fuel tanksSources for each “id” are optional, but if provided would be in elements such as <gpx>, <trk> or <trkseg>, much like in the gpx_fit examples.