EVAPORATIVE EMISSIONS TESTING USING INDUCTIVE HEATING

摘要

Methods and systems are provided for conducting an evaporative emissions test on a fuel tank and an evaporative emissions system in a vehicle. In one example, pressure for the evaporative emissions test is provided by inductive heating of the fuel tank while the vehicle undergoes an inductive battery charging operation. In this way, evaporative emissions testing may be enabled under conditions wherein sufficient heat rejection from the engine to the fuel tank is not available, and further enables evaporative emissions testing without the use of an external pump thus eliminating additional costs, and reducing the space occupied in the vehicle for evaporative emissions testing diagnostics.

主权项

1. A method comprising:
charging a battery of a hybrid electric vehicle by coupling a magnetic field between a primary coil external to the vehicle and a secondary coil onboard the vehicle; coupling the magnetic field between the primary coil and a ferrous fuel tank or ferrous member coupled to the tank; and comparing pressure in the fuel system and an emission system coupled to the tank to a reference pressure during a portion of the charging.