METHOD AND SYSTEM FOR DETECTING A LEAK IN A FUEL SYSTEM
First Claim
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1. Method for detecting a leak in a fuel system of a combustion engine of a hybrid vehicle, the fuel system comprising a fuel tank, the method comprising running the subsequent steps of:
- obtaining a first set of data comprising at least a pressure data measured in the fuel system at a first time;
adding energy to fluids contained in the fuel system, said energy being produced or wasted by means already present on board the vehicle for other purposes than adding energy to fluid ;
obtaining a second set of data comprising at least a pressure data measured in the fuel system at a second time;
determining the presence/absence of a leak in said fuel system by calculating a predetermined function on the basis of said first and second sets of data.
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Abstract
It is proposed a method for detecting a leak in a fuel system of a combustion engine comprising a fuel tank. The method is such that it comprises the steps of:
- obtaining a first set of data comprising at least a pressure data measured in the fuel system at a first time;
- adding energy to fluids contained in the fuel system, said energy being produced or wasted by means already present on board the vehicle for other purposes;
- obtaining a second set of data comprising at least a pressure data measured in the fuel system at a second time;
- determining the presence/absence of a leak in said fuel system by calculating a predetermined function on the basis of said first and second sets of data.
20 Citations
15 Claims
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1. Method for detecting a leak in a fuel system of a combustion engine of a hybrid vehicle, the fuel system comprising a fuel tank, the method comprising running the subsequent steps of:
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obtaining a first set of data comprising at least a pressure data measured in the fuel system at a first time; adding energy to fluids contained in the fuel system, said energy being produced or wasted by means already present on board the vehicle for other purposes than adding energy to fluid ; obtaining a second set of data comprising at least a pressure data measured in the fuel system at a second time; determining the presence/absence of a leak in said fuel system by calculating a predetermined function on the basis of said first and second sets of data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification