Structural optimization method for a fuel system filling assembly
AssigneeOPmobility C-Power Belgium Research
InventorsSylvain Poirier, Vincent Boutrelle
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Abstract
The invention relates to a method for structural optimization of a filling assembly 1 of a fuel system 2. According to the invention, such a method comprises the steps of filling the fuel system using the filling assembly 1, at a flow rate of a liquid 20, Qp; of measuring of a gas flow rate 11, Qc, at the outlet of the fuel vapor filtration device 7; of measuring a flow rate of gas heading towards the top of the tubing 12, Qr, within the second vent line 8, of calculating flow rate of gas exiting the fuel tank 13, Qd, using the relationship Qd=Qc+Qr; of determining a flow rate of air 14 entering through the top 3 of the tubing, Qa, using the relationship Qa=Qc−Qp and of configuring an air inlet 301 in the top of the tubing.
Claims6
A method for structural optimization of a filling assembly of a fuel system,
- said filling assembly comprising
- a filling gun,
- a top of a tubing having an opening configured to receive the filling gun therein,
- a separating wall positioned within the tubing and spaced apart from the opening,
- the separating wall comprising an insertion channel configured to receive the filling gun therein,
- said wall separating a first chamber located on the atmosphere side and a second chamber located on the tank side,
- a fuel tank,
- a fuel line fluidically connecting the fuel tank to the tubing,
- a first vent line fluidically connecting the tank to a fuel vapor filtration device,
- a second vent line fluidically connecting the fuel tank to the tubing,
- said method for structural optimization of a filling assembly of a fuel system comprising the following steps:
- filling the fuel system using the filling assembly, with a liquid flow rate Q, of between 15 and 38 L/minute,
- configuring an air inlet within the tubing, said configuration being carried out according to the following steps:
- sealing the tubing on the tank side,
- inserting the filling gun into the opening the tubing and through the insertion channel,
- sucking air through the second vent line, from the tubing into the fuel tank, at a suction flow rate threshold value of between 10 and 40 L/min,
- measuring the pressure within the tubing,
- configuring an air inlet connecting the tubing to the atmosphere so as to obtain a pressure drop of between 1 and 100 mbar between the second chamber on the tank side and the atmosphere,
- said configuration being made in the tubing at the gun by cutting a through-hole in the separating wall, the through-hole in the separating wall being spaced apart from the opening of the tube in a direction of insertion of the filling gun,
- wherein the cutting is carried out in the region of the insertion channel of the filling gun and in a direction parallel to the insertion channel of the filling gun.
Dependencies are inferred from the claim text.