Onboard refueling vapor recovery system and automobile having same

An onboard refueling vapor recovery system, wherein the onboard refueling vapor recovery system comprises a main canister and a spare canister which are filled with activated carbon, a hydrocarbon sensor, a grade rollover valve, a fill limit vent valve, and a fuel vapor pipe, the grade rollover valve and the fill limit vent valve are disposed at a top portion of a fuel tank, with opposite sides of the grade rollover valve and the fill limit vent valve respectively and hermetically connected with the fuel tank and a gas inlet end of the fuel vapor pipe, the main canister and the spare canister are respectively and hermetically connected with a gas outlet end of the fuel vapor pipe, the main canister is communicated with an intake manifold of an engine, the hydrocarbon sensor is disposed in the main canister, the hydrocarbon sensor is electrically connected with a vehicle control unit, the hydrocarbon sensor detects the concentration of hydrocarbon in the main canister and transmits the detection result to the vehicle control unit;

• wherein the fuel vapor pipe comprises a first gas inlet, a second gas inlet, a first gas outlet, and a second gas outlet, the first gas inlet is hermetically connected with one side of the grade rollover valve, and the second gas inlet is hermetically connected with one side of the fill limit vent valve, the first gas outlet is communicated with the main canister, and the second gas outlet is communicated with the spare canister.