@sh.add_function(dsp, outputs=['engine_fuel_lower_heating_value'])
def default_engine_fuel_lower_heating_value(fuel_type):
"""
Returns the default fuel lower heating value [kJ/kg].
:param fuel_type:
Fuel type (diesel, gasoline, LPG, NG, ethanol, methanol, biodiesel,
propane).
:type fuel_type: str
:return:
Fuel lower heating value [kJ/kg].
:rtype: float
"""
d = dfl.functions
if d.ENABLE_ALL_FUNCTIONS or d.default_fuel_lower_heating_value.ENABLE:
return d.default_fuel_lower_heating_value.LHV[fuel_type]
return sh.NONE