Phev (pneumatic hybrid electric vehicle)

A method for controlling a pneumatic hybrid electric engine, comprising the steps of:

• displaying an error state when any one of parts is not normal after checking a battery voltage, a gear, a zero-point of an accelerator, and line states of a first electron clutch, a second electron clutch, an air valve, a compressor, and a compressor driving motor;
• driving the engine in a pneumatic engine mode after 1) solving the abnormal state, 2) applying the first electron clutch, 3) opening the air valve, and 4) supplying compressed air to a pneumatic engine part;
• driving the engine in an electric engine mode by 1) operating an electric engine part when the power generated in the pneumatic engine part is transmitted to a first pulley through the first electron clutch and a transmission and to a second pulley through a belt and an rpm of the second pulley is higher than a predetermined value or a vehicle speed is higher than a predetermined value, 2) releasing the first electron clutch, and 3) applying the second electron clutch;
• and
• converting the engine drive mode from the electric engine mode to the pneumatic engine mode by 1) determining if the motor is over-loaded, and 2) stopping the electric engine mode by outputting a signal when excessive current is applied to the motor.