Device for monitoring the fuel pressure in the fuel supply circuit for an internal combustion engine with fuel injection
A device for monitoring the fuel pressure in the fuel feed circuit ( 7 ) of a fuel injection internal combustion engine ( 2 ), which includes at least one cylinder ( 2 ) and one exhaust line ( 6 ) for the combustion gases, characterized in that the device includes elements ( 8 ) for generating a value for measuring the fuel/air ratio of the exhaust gases in the exhaust line ( 6 ), elements ( 9 ) for generating a value for measuring the fresh air flow rate into the cylinder ( 2 ), elements ( 10 ) determining the mechanical opening time of the injector ( 4 ), and computation elements ( 1 ) for determining a reconstituted fuel pressure value from the value for measuring the fuel/air ratio of the exhaust gases, from the value for measuring the fresh air flow rate and from the mechanical opening time of the injector.