device and method to allow for the proper operation of the internal combustion engine powered alternately to a first or

摘要

A device to enable correct operation of a vehicle internal combustion engine fed with a primary fuel such as petrol and, alternatively, with an alternative fuel such as gas, and controlled electronically by an OBD system comprising a control unit (1) connected to means (3) for determining the primary fuel quantity present in a tank and to means for sensing optimum combustion conditions within said engine, the unit being also connected to display means (2) positioned in the vehicle driver compartment and arranged to indicate when operating conditions of said engine are not optimum, and to memory means for recording these conditions, the engine being able to be connected by means of a changeover member to a secondary fuel tank connected to the engine fuel feed conduit. The device comprises means for generating an electrical signal on switching the fuel from a first type of fuel to the second type, said signal inhibiting the connection the control unit to the display means in the passenger compartment, and to the memory means. IMAGE