Petrol engine having a low-pressure EGR circuit
AssigneeValeo Systemes de Controle Moteur
InventorsPhilippe Lutz, Sebastien Potteau, Laurent Albert
Life of this patent
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Abstract
Internal combustion petrol engine comprising an engine block (2) connected to an intake circuit (3) including a compressor (6) and an exhaust circuit (4) including a turbine (13) which drives the compressor, the internal combustion engine including an exhaust gas recirculation circuit (11) which is connected to the exhaust circuit downstream of the turbine and is connected to the intake circuit upstream of the compressor, the recirculation circuit comprising a cooler. Method of managing such an engine.
Claims11
A method for managing a gasoline heat engine for a motor, comprising:
- acting on a first quantity of gas from a recirculation circuit introduced into the supply system, when the motor has an operating parameter reaching a limit threshold at which knocking occurs, wherein the operating parameter is one selected from the group consisting of a quantity of gas from the recirculation circuit introduced into the intake, a quantity of gasoline introduced into a combustion chamber, and an ignition advance, detected at the engine block;
- and
- controlling the operating parameter so that a richness of the mixture introduced into the combustion chamber is maintained in a stoichiometric proportion when the operating parameter reaches the limit threshold;
- wherein the engine comprises:
- an engine block operatively connected to an intake circuit comprising a compressor;
- an exhaust system comprising a turbine for driving the compressor;
- a cooler connected to the intake circuit;
- and
- the recirculation circuit operatively connected to both the exhaust system downstream of the turbine and to the intake circuit upstream of the compressor,
- wherein the cooler is a water cooler, and
- wherein the water cooler is placed between the compressor and the engine block for cooling a recirculated air-gas mixture output from the compressor.
A gasoline heat engine comprising:
- an engine block of the gasoline heat engine operatively connected to an intake circuit comprising a compressor;
- an exhaust system comprising a turbine for driving the compressor;
- a cooler connected to the intake circuit;
- and
- an exhaust gas recirculation circuit operatively connected to both the exhaust system downstream of the turbine and to the intake circuit upstream of the compressor,
- wherein, when at least one parameter selected from the group consisting of a quantity of gas from the recirculation circuit introduced into the intake, a quantity of gasoline introduced into a combustion chamber, and an ignition advance, detected at the engine block reaches a limit threshold at which knocking occurs, the at least one parameter is controlled so that a richness of the mixture introduced into the combustion chamber is maintained in a stoichiometric proportion.
Dependencies are inferred from the claim text.