摘要:
La présente invention concerne un moteur à combustion interne à 4 temps à allumage commandé et à injection directe comprenant au moins une chambre de combustion (1) délimitée par un piston (2), un cylindre (3) et une culasse (4), plusieurs conduits d'admission (5) associés chacun à un élément d'admission (6), un conduit d'échappement (9) avec lequel coopère une soupape d'échappement (11), un moyen d'allumage (7) disposé à proximité des soupapes d'admission (6), la face supérieure du piston (2) présentant un profil proche de celui de la face inférieure de la culasse (4) et ledit piston (2) présentant un évidement (12) disposé à proximité de la région où débouche l'élément d'allumage (7). Selon l'invention le moteur comprend en outre un élément d'injection de carburant (8) placé à proximité dudit moyen d'allumage (7), l'un desdits éléments d'admission (6) présente un axe longitudinal proche de l'axe longitudinal du cylindre (XX').
摘要:
A cylinder direct injection spark-ignition engine in which fuel is directly injected into a combustion chamber to be ignited by a spark plug. The engine comprises a cylinder block having a plurality of cylinders. A cylinder head is fixedly mounted on the block deck of the cylinder block. The cylinder head has first and second intake ports and first and second intake ports for each cylinder. A fuel injector valve is provided for directly injecting fuel into the combustion chamber formed corresponding to each cylinder. The spark plug is provided having a tip end section which is projected into the combustion chamber. A piston is movably disposed in the cylinder to define the combustion chamber between it and the cylinder head. The piston is formed at its piston crown with a generally circular cavity having a center axis which is offset from a center axis of the piston toward the intake valves. A swirl control valve is disposed to control air flow in the first intake port in accordance with an engine operating condition. In the thus arranged engine, the second intake port has an axis whose at least a major part is contained in a first vertical plane which inclines relative to a second vertical plane to form a first predetermined angle, the first vertical plane gradually approaching the center axis of the piston in a direction toward the combustion chamber relative to the vertical cross flow plane. The first and second vertical planes are vertical to the block deck of the cylinder block. The second vertical plane passes through the first intake and exhaust valves and is perpendicular to a third vertical plane containing the center axes of the cylinders and vertical to the block deck. The first intake and exhaust valves are located respectively on opposite sides of the third vertical plane.
摘要:
Le moteur à combustion interne à injection directe et allumage commandé, comprend une chambre de combustion à bougie centrée et injecteur excentré par rapport à l'axe du cylindre-moteur. Il comprend également un élément de culasse en forme de toit (4) dont l'arête (12) s'étend entre les orifices d'admission et les orifices d'échappement avec l'injecteur (16) débouchant dans la chambre entre les plans diamétraux verticaux, perpendiculaires à l'arête (12), des orifices d'admission. L'injecteur (16) est à la fois incliné (A) par rapport au plan (P1) du joint de culasse et par rapport à un plan (P2) perpendiculaire à l'arête du toit.
摘要:
A cylinder injection type internal combustion engine in which a lower side of a cylinder head (8) forming an upper side of a combustion chamber (3) is formed into a pent-roof shape comprising an intake valve side inclined lower side (8a) and an outlet valve side inclined lower side (8b) with an ignition plug (6) being disposed in the vicinity of a top portion of an upper side of the pent-roof shaped combustion chamber (3), and in which a top surface of a piston (2) forming a lower side of the combustion chamber (3) is formed into a pent-roof shape having an intake valve side inclined upper side (2a) and an outlet valve side inclined upper side (2b) that correspond to the intake valve side inclined lower side (8a) and outlet valve side inclined lower side (8b), respectively, with a recessed portion (25) being disposed in the intake valve side upper side (2a) at the top surface of the piston (2).
摘要:
A cylinder injection type internal combustion engine wherein a recessed portion (22A) is formed in an upper surface of a piston (22) so as to produce and develop a vertical vortex current in which intake gas that is introduced into a combustion chamber (27) of the engine is directed from a lower side (21A) of a cylinder head (21) of the engine to the upper surface of the piston (22) and then from the upper surface of the piston (22) to the lower side (21A) of the cylinder head, and wherein a corner on an outlet side of the recessed portion (22A) where the vertical vortex current exits, is formed more bluntly than a corner of the recessed portion (22A) where the vertical eddy current enters, whereby fuel is directly injected into the combustion chamber (27). This cylinder injection type internal combustion engine can, in particular, stably burn thin fuel-air mixture in a stratified fashion on thereby reduce fuel consumption and, even in burning fuel-air mixture richer than the thin fuel-air mixture, it can ensure a high output, whereby it is possible to provide an internal combustion engine with high efficiency.
摘要:
Under a partial load, a pumping loss is reduced by a stratified combustion to enhance a fuel consumption, and during the maximum output operation, the output is increased by a premixture combustion, and the output of an engine is controlled, thereby enhancing the drivability. Under the partial load, an ignition source is provided in the vicinity of a fuel injection valve, and after the fuel is injected, the mixture is ignited, and a resulting flame is caused by a spray of the fuel to spread into a cylinder, thereby effecting a stratified combustion. When the load increases, so that soot and so on are produced in the stratified combustion, the fuel injection is effected a plurality of times in a divided manner, and a premixture is produced within the cylinder by the front-half injection, and a flame, produced by the latter-half injection, is injected into the cylinder to burn this premixture.
摘要:
Under a partial load, a pumping loss is reduced by a stratified combustion to enhance a fuel consumption, and during the maximum output operation, the output is increased by a premixture combustion, and the output of an engine is controlled, thereby enhancing the drivability. Under the partial load, an ignition source is provided in the vicinity of a fuel injection valve, and after the fuel is injected, the mixture is ignited, and a resulting flame is caused by a spray of the fuel to spread into a cylinder, thereby effecting a stratified combustion. When the load increases, so that soot and so on are produced in the stratified combustion, the fuel injection is effected a plurality of times in a divided manner, and a premixture is produced within the cylinder by the front-half injection, and a flame, produced by the latter-half injection, is injected into the cylinder to burn this premixture.