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1. WO2017129386 - VARIABLE COMPRESSION RATIO INTERNAL COMBUSTION ENGINE WITH TWO MIXING ZONES, NOTABLY FOR A MOTOR VEHICLE, AND METHOD OF INJECTION FOR SUCH A VEHICLE

Publication Number WO/2017/129386
Publication Date 03.08.2017
International Application No. PCT/EP2017/050328
International Filing Date 09.01.2017
IPC
F02B 23/06 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
23Other engines characterised by special shape or construction of combustion chambers to improve operation
02with compression ignition
06the combustion space being arranged in working piston
F02D 15/02 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
DCONTROLLING COMBUSTION ENGINES
15Varying compression ratio
02by alteration or displacement of piston stroke
CPC
F02B 23/0651
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
23Other engines characterised by special shape or construction of combustion chambers to improve operation
02with compression ignition
06the combustion space being arranged in working piston
0645Details related to the fuel injector or the fuel spray
0648Means or methods to improve the spray dispersion, evaporation or ignition
0651the fuel spray impinging on reflecting surfaces or being specially guided throughout the combustion space
F02B 23/0666
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
23Other engines characterised by special shape or construction of combustion chambers to improve operation
02with compression ignition
06the combustion space being arranged in working piston
0645Details related to the fuel injector or the fuel spray
0666having a single fuel spray jet per injector nozzle
F02B 23/0669
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
23Other engines characterised by special shape or construction of combustion chambers to improve operation
02with compression ignition
06the combustion space being arranged in working piston
0645Details related to the fuel injector or the fuel spray
0669having multiple fuel spray jets per injector nozzle
F02B 23/0672
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
23Other engines characterised by special shape or construction of combustion chambers to improve operation
02with compression ignition
06the combustion space being arranged in working piston
0672Omega-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder center axis
F02B 23/0693
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
23Other engines characterised by special shape or construction of combustion chambers to improve operation
02with compression ignition
06the combustion space being arranged in working piston
0678Unconventional, complex or non-rotationally symmetrical shapes of the combustion space, e.g. flower like, having special shapes related to the orientation of the fuel spray jets
0693the combustion space consisting of step-wise widened multiple zones of different depth
F02B 75/04
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
BINTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
75Other engines
04Engines with variable distances between pistons at top dead-centre positions and cylinder heads
Applicants
  • IFP ENERGIES NOUVELLES [FR]/[FR]
Inventors
  • DE PAOLA, Gaetano
  • ZACCARDI, Jean-Marc
  • DEGEILH, Philippe
  • CHEVILLARD, Stéphane
Priority Data
16 5059226.01.2016FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) VARIABLE COMPRESSION RATIO INTERNAL COMBUSTION ENGINE WITH TWO MIXING ZONES, NOTABLY FOR A MOTOR VEHICLE, AND METHOD OF INJECTION FOR SUCH A VEHICLE
(FR) MOTEUR À COMBUSTION INTERNE À TAUX DE COMPRESSION VARIABLE AVEC DEUX ZONES DE MÉLANGE, NOTAMMENT POUR VÉHICULE AUTOMOBILE ET PROCÉDÉ D'INJECTION POUR UN TEL MOTEUR
Abstract
(EN)
Variable compression ratio direct-injection internal combustion engine comprising at least one cylinder (10), a cylinder head (12) bearing a fuel injection means (14) spraying fuel in a single layer (34) of fuel jets (36), a piston (16) sliding in this cylinder, and a combustion chamber (32) delimited on one side by the top face (42) of the piston comprising a pip (46) rising up toward the cylinder head and arranged at the centre of a concave bowl (44). According to the invention, the combustion chamber comprises at least two mixing zones (Z1, Z2) into which the fuel jets (36) are injected, one of the zones (Z1) being used for a maximum compression ratio (Tmax) and the other (Z2) of the zones being used for a minimum compression ratio (Tmin).
(FR)
Moteur à combustion interne à injection directe à taux de compression variable comprenant au moins un cylindre (10), une culasse (12) portant un moyen d'injection de carburant (14) projetant du carburant selon une seule nappe (34) de jets de carburant (36), un piston (16) coulissant dans ce cylindre, et une chambre de combustion (32) délimitée sur un côté par la face supérieure (42) du piston comportant un téton (46) s'érigeant en direction de la culasse et disposé au centre d'un bol concave (44). Selon l'invention, la chambre de combustion comprend au moins deux zones de mélange (Z1, Z2) dans lesquelles sont injectés les jets de carburant (36), l'une (Z1) des zones étant utilisée pour un taux de compression maximal (Tmax) et l'autre (Z2) des zones étant utilisée pour un taux de compression minimal (Tmini).
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