@sh.add_function(dsp, outputs=['gear_box_efficiency_constants'])
def get_gear_box_efficiency_constants(has_torque_converter, gear_box_type):
"""
Returns vehicle gear box efficiency constants (gbp00, gbp10, and gbp01).
:param has_torque_converter:
Does the vehicle use torque converter?
:type has_torque_converter: bool
:param gear_box_type:
Gear box type (manual or automatic or cvt).
:type gear_box_type: str
:return:
Vehicle gear box efficiency constants (gbp00, gbp10, and gbp01).
:rtype: dict
"""
PARAMS = dfl.functions.get_gear_box_efficiency_constants.PARAMS
return PARAMS[has_torque_converter and gear_box_type != 'cvt']