Abstract: The present disclosure provides a method of supplying fuel for a motorcycle engine. The method includes the following steps. A tank, a pipe and an injector are provided, and the pipe is connected between the tank and the injector. Fuel in the tank is transported to the injector through the pipe, and a pressure of the fuel in the pipe is in a range larger than 2.5 and smaller than or equal to 4.0 kg/cm2.

Abstract: A light emitting diode (LED) driving circuit includes a power supply, a rectification circuit, an LED array and a current control circuit. The invention is characterized that, when the power supply passes through the current control circuit, using charging and discharging of a capacitor and parallel equivalent resistance current-limiting characteristics of a capacitor and a resistor, the rectification circuit converts an alternating current into a direct current that is outputted to the LED array, thereby providing the LED array with a stable quota driving current.

Abstract: A light bulb comprising a structure characterized in having a light reflecting plate and a light-emitting repository configured on a circuit board. Upon the circuit board being disposed in a base of the light bulb, connecting pins are employed to connect the circuit board to the base. After electricity is supplied to entire light-emitting device, rays of light directly emitting from the light-emitting repository are rectified by means of an elevation of the light reflecting plate, furthermore, an inclined surface of the light reflecting plate is employed to control the rays of light emitted at an angle greater than direct emittance angle, thereby achieving uniform distribution of the rays of light, and thus enhancing brightness and degree of uniformity thereof.