Abstract: The invention concerns an internal combustion engine with at least one engine member, the engine member including a combustion chamber (4) of a combustible mixture with fuel components and oxidants, an ignition system of the combustible mixture by an igniter (7), sequential let-through devices for the fuel and oxidant components and for the combustion products, the engine being of the supercharging type by boost pressure of the oxidant components upstream of the engine member. According to the invention, the ignition system includes a closed head (6) (12a) substantially spherical enclosing the igniter in a precombustion chamber, the head including a set of orifices (5) intended to communicate the combustion chamber and the precombustion chamber so that combustible mixture may flow into the precombustion chamber. In a variation of the invention, at least one of the let-through devices is a direct injector in the combustion chamber for, in all or in part, the fuel components and/or fuels.

Abstract: The invention concerns an internal combustion engine with at least one engine member, the engine member including a combustion chamber (4) of a combustible mixture with fuel and oxidant components fitted with a compression system (9), an ignition system (7) of the combustible mixture by an igniter, sequential let-through devices for the fuel and oxidant components and for the combustion products. According to the invention, the ignition system includes a closed head (6)(12a) substantially spherical enclosing the igniter in a precombustion chamber, the head including a set of orifices (5) intended to communicate the combustion chamber and the precombustion chamber so that combustible mixture may flow into the precombustion chamber, and at least one of the let-through devices is a direct injector in the combustion chamber for the fuel and/or oxidant components, in all or in part. A method and an application are also described.

Abstract: The invention relates to a gasoline internal combustion engine with controlled ignition, comprising at least one cylinder (1), a cylinder head (2), scaling the cylinder (1), a piston (3), a combustion chamber (4), a gasoline injection means (5), an ignition means (6), for production of an ignition of the air/gasoline mixture in the combustion chamber, inlet (7) and exhaust (8) valves, selectively sealing the combustion chamber (4), an injection pump (8), for supplying the injector (5) with gasoline under pressure, wherein the pressure of the gasoline, provided to the injector (5), exceeds 250 bars and in at least in one operating range, the amount of gasoline delivered by the pump (8) to the injector (5) for one combustion cycle is divided into a number of partial and distinct injections with at least one partial injections delivered before ignition and at least one after.

Abstract: The invention concerns an ignition device for internal combustion engine, containing: a main chamber (1) designed for including a main combustible mixture, and fitted with a compression system of said mixture, and an igniter (11) containing a precombustion chamber (2) designed for receiving reactants and an ignition system (13,14) of the reactants contained in the precombustion chamber (2), said precombustion chamber (2) being defined by a precombustion chamber body (12) having a head (12a) including at least one passageway (15), said head (12a) of the precombustion chamber body separating the precombustion chamber (2) from the main chamber (1) and communicating the precombustion chamber (2) and the main chamber (1) by dint of the passageway(s) (15), characterised in that the head (12a) is coated at least partially externally with a coating layer (R) of at least one refractory material.

Abstract: The invention concerns an ignition device for internal combustion engine, containing: a main chamber (1) designed for including a main combustible mixture, and fitted with a compression system of said mixture, an igniter (11) containing a precombustion chamber (2) designed for receiving reactants and an ignition system (13,14) of the reactants contained in the precombustion chamber, said precombustion chamber (2) being defined by a precombustion chamber body (12) having a head (12a) including at least one passageway (15), said head (12a) of the precombustion chamber body separating the precombustion chamber (2) from the main chamber (1) and communicating the precombustion chamber (2) and the main chamber (1) by dint of the passageway(s) (15), characterised in that said precombustion chamber body (12) is made of a material having a thermal conductivity at 20° C. of at least 10 W/K/m.

Abstract: The invention concerns an ignition device for internal combustion engine comprising: a main combustion chamber (1) fitted with a compression system; and an igniter (11) comprising a precombustion chamber (2) and an ignition system (13, 14), the precombustion chamber being defined by a precombustion chamber body (12) having a head (12a) including passageways (15), the head (12a) of the precombustion chamber body (12) separating the precombustion chamber (2) from the main chamber (1) and communicating the precombustion chamber (2) and the main chamber (1) through the passageways (15), characterized in that the passageways comprise at least one passageway enabling the propagation of a flame front of the precombustion chamber (2) to the main chamber (1) when the engine operates on low load and at least one passageway not enabling the propagation of a flame front while enabling the passageway of unstable compounds of the precombustion chamber (2) to the main chamber (1).

Abstract: The invention concerns an ignition device for internal combustion engine, containing: a main chamber (1) designed for including a main combustible mixture, and fitted with a compression system of said mixture, and an igniter (11) containing a precombustion chamber (2) designed for receiving reactants and an ignition system (13,14) of the reactants contained in the precombustion chamber (2), said precombustion chamber (2) being defined by a precombustion chamber body (12) having a head (12a) including at least one passageway (15), said head (12a) of the precombustion chamber body separating the precombustion chamber (2) from the main chamber (1) and communicating the precombustion chamber (2) and the main chamber (1) by dint of the passageway(s) (15), characterised in that the head (12a) is coated at least partially externally with a coating layer (R) of at least one refractory material.

Abstract: The invention concerns an internal combustion engine with at least one engine member, the engine member including a combustion chamber (4) of a combustible mixture with fuel and oxidant components fitted with a compression system (9), an ignition system (7) of the combustible mixture by an igniter, sequential let-through devices for the fuel and oxidant components and for the combustion products. According to the invention, the ignition system includes a closed head (6)(12a) substantially spherical enclosing the igniter in a precombustion chamber, the head including a set of orifices (5) intended to communicate the combustion chamber and the precombustion chamber so that combustible mixture may flow into the precombustion chamber, and at least one of the let-through devices is a direct injector in the combustion chamber for the fuel and/or oxidant components, in all or in part. A method and an application are also described.

Abstract: The disclosure concerns an internal combustion engine with controlled ignition having at least a combustion chamber (4), means (8, 18) for injection of fuel or an air-fuel mixture into the combustion chamber (4), ignition means (7) to generate an ignition of the air-fuel mixture in the combustion chamber (4), the ignition means (7) comprising a spark generator (13) arranged in a precombustion chamber (1) delimited by a wall (12), the precombustion chamber (1) communicating with the combustion chamber (4) through at least a port (5) formed in the wall (12), wherein the means (8, 18) for injection are adapted to inject the fuel into the combustion chamber (4) at a pressure of at least 250 bar such as to create an air fuel mixture and to make it easier for a part of this mixture to penetrate inside the precombustion chamber (1).

Abstract: The invention concerns an ignition device for internal combustion engine comprising: a main combustion chamber (1) fitted with a compression system; and an igniter (11) comprising a precombustion chamber (2) and an ignition system (13, 14), the precombustion chamber being defined by a precombustion chamber body (12) having a head (12a) including passageways (15), the head (12a) of the precombustion chamber body (12) separating the precombustion chamber (2) from the main chamber (1) and communicating the precombustion chamber (2) and the main chamber (1) through the passageways (15), characterised in that the passageways comprise at least one passageway enabling the propagation of a flame front of the precombustion chamber (2) to the main chamber (1) when the engine operates on low load and at least one passageway not enabling the propagation of a flame front while enabling the passageway of unstable compounds of the precombustion chamber (2) to the main chamber (1).

Abstract: The invention concerns an ignition device for internal combustion engine, containing: a main chamber (1) designed for including a main combustible mixture, and fitted with a compression system of said mixture, an igniter (11) containing a precombustion chamber (2) designed for receiving reactants and an ignition system (13,14) of the reactants contained in the precombustion chamber, said precombustion chamber (2) being defined by a precombustion chamber body (12) having a head (12a) including at least one passageway (15), said head (12a) of the precombustion chamber body separating the precombustion chamber (2) from the main chamber (1) and communicating the precombustion chamber (2) and the main chamber (1) by dint of the passageway(s) (15), characterised in that said precombustion chamber body (12) is made of a material having a thermal conductivity at 20 ° C. of at least 10 W/K/m.

Abstract: The disclosure concerns an internal combustion engine with controlled ignition having at least a combustion chamber (4), means (8, 18) for injection of fuel or an air-fuel mixture into the combustion chamber (4), ignition means (7) to generate an ignition of the air-fuel mixture in the combustion chamber (4), the ignition means (7) comprising a spark generator (13) arranged in a precombustion chamber (1) delimited by a wall (12), the precombustion chamber (1) communicating with the combustion chamber (4) through at least a port (5) formed in the wall (12), wherein the means (8, 18) for injection are adapted to inject the fuel into the combustion chamber (4) at a pressure of at least 250 bar such as to create an air fuel mixture and to make it easier for a part of this mixture to penetrate inside the precombustion chamber (1).