GASOLINE AND CNG BI FUEL SYSTEM AND METHOD FOR CORRECTING FUEL QUANTITY OF THE SAME

摘要

PURPOSE: A bi-fuel system using both compressive natural gas and gasoline and a method of correcting the amount of fuel of the system are provided to prevent the output of an engine from decreasing and enhance torque and fuel efficiency when the fuel structure of a vehicle changes to use various kinds of fuel. CONSTITUTION: A method of correcting the amount of fuel comprises next steps. A vehicle ECU(200) is connected and driven to a PC with a fuel-amount correcting program. If the program is executed, an administrator screen is displayed on the PC and ECU values are received from the vehicle ECU. After the amount of fuel, a CNG pressure sensor, and a CNG temperature sensor are corrected, and a water sensor and an injector are set, tuning on fuel amount is performed. Based on the effective injecting time of gasoline and the effective injecting time of the CNG, the ineffective injecting time of gasoline and the ineffective injecting time of CNG are corrected to correct the injecting amount of gasoline and the injecting amount of CNG.