An engine fuel management system for a dual fuel vehicle

摘要

A vehicle engine management system includes a single engine control unit 4 with a control/processor 22 and store devices 23-25. The vehicle can be powered by gas fuel from tank 27 via gas injectors 6 or by petrol from tank 8 via petrol injectors 2. The control 22 utilises mapping 23, 24 to monitor the driving conditions to determine whether gas or petrol is used. To refuel the vehicle a cycle of operations is carried out by control 22 using the sequences stored in device 25. The presence of a connected gas supply is determined via detector 13a and gas tank pressure via sensor 27a and a compressor 28 is operable during the cycle to refuel the tank. Refilling automatically terminates and after this the car can be driven away when fuel line decoupling is detected.