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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
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
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机译:用于在具有双燃烧区和低压缩比的燃烧室中产生燃料混合物的具有双薄板角的直喷式内燃机及其使用方法
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摘要
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 (44) of a piston (16) comprising a projection (48) arranged in the center of a concave bowl (46) with at least two mixing zones (Z1, Z2), a fuel injection comprising at least one injector (30) projecting fuel in at least two fuel jet sheets (36, 38) with different sheet angles (A1, A2). The fuel injector comprises two rows of injection orifices (33a, 33b) arranged one above the other with the number of orifices of each row (Ninf, Nsup) is greater than or equal to −4·Ns+14 and less than or equal to −4·Ns+16 for the lower sheet or −4·Ns+18 for the upper sheet. Ns is the swirl number of this engine with a swirl number less than 1.5.
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