Process for supplying fuel to an internal combustion engine and engine for using it
AssigneeRegie Nationale des Usines Renault
InventorsPierre Cochard, Bernard Vallee
Life of this patent
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Abstract
A process for supplying fuel to an internal combustion engine of the multi-cylinder type with controlled fuel injection and comprising a controlled fuel vapor recovery system. During predetermined operating phases of the engine, the fuel injection is stopped for a given period, while the fuel vapors trapped in the recovery system are recycled into an intake circuit of the engine.
Claims12
A process for supplying fuel to a multi-cylinder type internal combustion engine having fuel injection controlled by an engine control system and comprising a controlled fuel vapor recovery system, the process comprising the steps of:
- stopping a fuel injection for a given period while fuel vapors trapped in said fuel vapor recovery system are recycled in an intake circuit of the engine during operating phases defined by values of one or more representative parameters of operation of the engine, the operating phases comprising a cold-starting phase of the engine;
- and
- activating a recycling of the fuel vapors by using heating means which cooperate with the fuel vapor recovery system.
An internal combustion engine comprising:
- a combustion air intake circuit;
- at least one controlled fuel injector;
- a fuel vapor recovery system connected to said air intake circuit and having pipes which are equipped with controlled valves;
- controlled heating means cooperating with said fuel vapor recovery system;
- and
- an electronic control system which selectively controls the at least one injector, the controlled valves of the pipes and the heating means depending on values taken from at least one representative parameter of the operation of the engine, so as to allow a stopping of fuel injection for a given period, while fuel vapors trapped in said recovery system are recycled into the air intake circuit of the engine.
Dependencies are inferred from the claim text.