Ifp Energies Nouvelles

Airbus Helicopters

Stéphane Richard

Olivier Laget

Lionel Martinez

Luis Enrique Martinez Alvarado

The present invention is a fuel injection method for a compression-ignition internal-combustion engine running in single-fuel or multi-fuel mode. The method, in a single-fuel mode, injects liquid fuel (Fuel) into lower zone (Z) and/or upper zone (Z) of the combustion chamber and, in a multi-fuel mode, provides in the chamber mixing of an oxidizer with another fuel (Fuel) and injection of liquid fuel (Fuel) into lower zone (Z) or both zones (Z, Z) of the combustion chamber.

Method of injecting fuel into the combustion chamber of an internal-combustion engine running in single-fuel or multi-fuel mode

The present invention relates to a compression-ignition direct-injection internal-combustion engine comprising at least a cylinder (), a cylinder head () carrying fuel injection () projecting the fuel in at least two fuel jet sheets () with different sheet angles (A, A), a piston () sliding in the cylinder, a combustion chamber () limited on one side by upper face () of the piston comprising a projection () extending in the direction of the cylinder head and arranged in the center of a concave bowl () with at least two mixing zones (Z, Z), and piston cooler () housed in the material of the piston. According to the invention, the piston cooler comprises at least one circumferential gallery () concentric to piston bowl () and arranged opposite at least one mixing zone (Z, Z).

Compression engine with direct fuel injection with compression ignition comprising means for cooling the piston

The present invention is a compression-ignition direct-injection internal-combustion engine comprising at least a cylinder, a cylinder head carrying fuel injection, a piston sliding in the cylinder, a combustion chamber limited on one side by upper face of the piston comprising a projection extending in the direction of the cylinder head and in the center of a concave bowl () with at least two mixing zones. The fuel injection projects fuel in at least two fuel jet sheets with different sheet angles, with a lower sheet having a jet axis Cfor one zone and an upper sheet having a jet axis for the other zone. The injection feeds fuel into the combustion chamber with a different flow rate for each sheet for dedicated targeting in the mixing zones of the combustion chamber.

Internal combustion engine with injection of two fuel jets at different flow rates and fuel-injection method for such an engine

The present invention is a compression-ignition direct-injection internal-combustion engine comprising at least a cylinder (), a cylinder head () carrying fuel injection means (), a piston () sliding in the cylinder, a combustion chamber () limited on one side by an upper face () of the piston comprising a projection () extending in the direction of the cylinder head and located in a center of a concave bowl (). The engine comprises injection projecting fuel in at least two fuel jet sheets. One of the zones comprises a toroidal volume () having center B with a flat bottom () into which fuel jets () of the lower sheet are injected so that an axis Cof the lower sheet jets is contained between center B and projection ().

Direct fuel injection combustion engine and more particularly a compression-ignition engine with a low compression ratio

The present invention relates to a fuel injection method for a compression-ignition direct-injection internal-combustion engine comprising at least a cylinder (), a cylinder head () carrying fuel injectors (), a piston () sliding in the cylinder, a combustion chamber () delimited on one side by an upper face () of the piston comprising a projection () extending in the direction of the cylinder head and located in the center of a concave bowl () with at least two mixing zones (Z, Z). The injectors project fuel in at least two fuel jet sheets () with different sheet angles (A, A). The injection into the combustion chamber with the fuel jets () by one sheet () is in a radial direction (C) which forms a non-zero angle (b) with the radial direction (C) of fuel jets () of the other sheet (). The oxidizer is admitted into the cylinder in a swirling motion with a swirl number less than or equal to 1.5.

Method for monitoring the fuel injection of an internal combustion engine with direct injection, in particular with compression ignition, and engine using such a method

The present invention relates to a compression-ignition direct-injection internal-combustion engine with a compression ratio ranging between 13.5 and 16.5 including a combustion chamber limited on one side by upper face () of a piston () comprising a projection () arranged in the center of a concave bowl () with at least two mixing zones (Z, Z), a fuel injection comprising at least one injector () projecting fuel in at least two fuel jet sheets () with different sheet angles (A, A). The fuel injector comprises two rows of injection orifices () arranged one above the other with the number of orifices of each row (Ninf, Nsup) is greater than or equal to &#x2212;4&#xb7;Ns+14 and less than or equal to &#x2212;4&#xb7;Ns+16 for the lower sheet or &#x2212;4&#xb7;Ns+18 for the upper sheet. Ns is the swirl number of this engine with a swirl number less than 1.5.

Direct-injection internal-combustion engine with dual sheet angle for producing a fuel mixture in a combustion chamber with dual combustion zone and low compression ratio, and method for using same

The present invention is a compression-ignition direct-injection internal-combustion engine comprising at least a cylinder (), a cylinder head () carrying fuel injection means (), a piston () sliding in this cylinder, a combustion chamber () having on one side an upper face () of the piston comprising a projection () extending in the direction of the cylinder head and located at the center of a concave bowl (). The engine comprises an injector projecting fuel in at least two fuel jet sheets with sheet injection angles (A, A), a lower sheet () of jet axis Cand an upper sheet () of jet axis C, at least two mixing zones (Z, Z) of the combustion chamber. According to the invention, one of the zones comprises a toroidal volume () of center B into which fuel jets () of the lower jet are injected in such a way that axis Cof the lower jet is contained between center B and projection ().

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Bazainville, France

Stéphane Richard