Fuel System for an Internal Combustion Engine

Abstract

A fuel system, and a method for manufacturing such a fuel system, for an internal combustion engine operating with a liquid fuel and including a fuel reservoir intended for the fuel and an additive reservoir including a chamber formed in a concave recess of the wall of the fuel reservoir.

1 - 10 . (canceled)  
   
   
       11 . A fuel system for an internal combustion engine operating with a liquid fuel and comprising: 
 a fuel reservoir intended for the fuel; and    an additive reservoir, said additive reservoir including a chamber formed in a concave recess of a wall of the fuel reservoir.    
   
   
       12 . The fuel system according to  claim 11 , wherein an additive is intended to be added to the fuel, and wherein the chamber communicates with the fuel reservoir by an opening provided through the fuel reservoir.  
   
   
       13 . The fuel system according to  claim 12 , wherein the chamber includes a system for metering the additive from the chamber into the fuel reservoir, via the opening, the metering system including a pump and an injector passing through the opening.  
   
   
       14 . The fuel system according to  claim 12 , wherein the additive is added to the fuel just after the fuel reservoir has been filled, in a quantity calculated by an on-board computer or a calculator connected to a device enabling opening and closing of the fuel reservoir to be detected, and wherein the computer or calculator is configured to calculate a volume of fuel introduced during filling and of consequently metering the additive.  
   
   
       15 . The fuel system according to  claim 12 , wherein: 
 the fuel is diesel and the engine is a compression-ignition engine; and    the additive includes a composition, dissolved in a hydrocarbon solvent, of a catalyst for low-temperature combustion of carbonaceous solid particulates produced by incomplete combustion of diesel in the engine.    
   
   
       16 . The fuel system according to  claim 11 , wherein the chamber is closed by a lid made of a same material as that of the fuel reservoir.  
   
   
       17 . The fuel system according to  claim 11 , further comprising a tube for filling the additive reservoir emerging in the tube for filling the fuel reservoir.  
   
   
       18 . The fuel system according to  claim 11 , further comprising a tube for degassing the additive reservoir emerging in the tube for filling the fuel reservoir.  
   
   
       19 . A method for manufacturing a fuel system according to  claim 11 , wherein: 
 a reservoir for the fuel is manufactured, of which a wall has a recess that is concave on its outer face;    a lid is manufactured;    the lid is hermetically attached to a peripheral edge of the concave recess, so as to form the chamber;    an additive is introduced into the chamber before or after the lid is attached; and    the chamber is connected to a system for metering the additive before or after the additive is introduced into the chamber.    
   
   
       20 . The method according to  claim 19 , wherein the reservoir and the lid are made of a thermoplastic material, and wherein the reservoir is manufactured by blow-extrusion and the lid by injection.