NOVELTY - The device comprises a resolver (310) that detects the speed of an engine (300) during a normal operation. A wheel speed sensor (510) detects a wheel speed of a fuel cell mounted on a vehicle drive wheel (500). An anti-lock braking system (ABS) controller (104) calculates an average wheel speed and transmits the calculated speed. A fuel cell controller (103) detects an error of the resolver and receives data regarding the wheel speed, and control/regulates the driving of the engine by calculating the speed of the engine based on the wheel speed data.    USE - Device for balancing speed of engine of fuel cell vehicle during failure of resolver. Can also be used in hybrid electric vehicles and motor vehicles such as passenger cars, sports utility vehicles (SUV), buses, trucks and watercraft such as boats and ships and aircraft.    ADVANTAGE - The speed of the engine is accurately balanced, even if the error in the resolver is generated. The pollution is minimized, since the fuel cell vehicle has no harmful discharges. The fuel cell vehicle has high probability. The vehicle is driven without stopping the vehicle in an emergency operating mode by switching the fuel cell controller, when the speed of the engine is calculated on the basis of the received wheel speed data. Therefore, the stability and reliability of the fuel cell vehicles during operation, are increased even if the error of the resolver has occurred.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a method of balancing a speed of an engine of a fuel cell vehicle; and    (2) a non-volatile computer-readable medium storing program for balancing a speed of an engine of a fuel cell vehicle.    DESCRIPTION OF DRAWING(S) - The drawing shows the block diagram of the device for balancing for speed of engine of fuel cell vehicle. (Drawing includes non-English language text)    Fuel cell controller (103)    ABS controller (104)    Engine (300)    Resolver (310)    Vehicle drive wheel (500)    Wheel speed sensor (510)