摘要:
The invention concerns an internal combustion engine, in particular with direct injection comprising at least one cylinder (10), one piston (30) sliding in said cylinder, a combustion chamber (26) delimited on one side by the upper side of the piston including a concave trough (32) wherein is arranged a dog point (34) with apex angle (a2) and a fuel injector (22) for injecting fuel at a spray angle (a1) not greater than 2 Arctg CD/2f where CD is the diameter of the cylinder (10) and F the distance between the point of origin of the fuel jets derived from the injector and the position of the piston (30) corresponding to a crankshaft angle of 50° relative to the upper dead center. The invention is characterized in that the apex angle (a2) of the dog point is greater than the spray angle (a1) by an angle ranging between 30° and 60°.
摘要翻译:本发明涉及内燃机,特别是直接喷射,其包括至少一个气缸(10),在所述气缸中滑动的一个活塞(30),在活塞的上侧限定一侧的燃烧室(26),其包括 凹槽(32),其布置有具有顶角(a2)的爪形点(34)和用于以不大于2Arctg CD / 2f的喷射角(a1)喷射燃料的燃料喷射器(22),其中CD是 气缸(10)的直径,F是从喷射器获得的燃料喷嘴的原点与相对于上死点相对应的曲轴角度为50°的活塞(30)的位置之间的距离。 本发明的特征在于,该爪点的顶角(a2)大于喷雾角(a1)30°至60°之间的角度。
摘要:
The invention concerns an internal combustion engine, in particular with direct injection comprising at least one cylinder (10), one piston (30) sliding in said cylinder, a combustion chamber (26) delimited on one side by the upper side of the piston including a concave trough (32) wherein is arranged a dog point (34) with apex angle (a2) and a fuel injector (22) for injecting fuel at a spray angle (a1) not greater than 2 Arctg CD/2f where CD is the diameter of the cylinder (10) and F the distance between the point of origin of the fuel jets derived from the injector and the position of the piston (30) corresponding to a crankshaft angle of 50° relative to the upper dead center. The invention is characterized in that the apex angle (a2) of the dog point is greater than the spray angle (a1) by an angle ranging between 30° and 60°.
摘要翻译:本发明涉及内燃机,特别是直接喷射,其包括至少一个气缸(10),在所述气缸中滑动的一个活塞(30),在活塞的上侧限定一侧的燃烧室(26),其包括 凹槽(32),其布置有具有顶角(a2)的爪形点(34)和用于以不大于2Arctg CD / 2f的喷射角(a1)喷射燃料的燃料喷射器(22),其中CD是 气缸(10)的直径,F是从喷射器获得的燃料喷嘴的原点与相对于上死点相对应的曲轴角度为50°的活塞(30)的位置之间的距离。 本发明的特征在于,该爪点的顶角(a2)大于喷雾角(a1)30°至60°之间的角度。
摘要:
A method facilitates vaporization of a fuel in a direct-injection four-stroke engine including at least one cylinder with a combustion chamber, at least one fluid intake with an intake pipe and a valve, at least one burnt gas exhaust with an exhaust pipe and a valve, a valve controller and fuel injector. The method includes, in the vicinity of the intake phase start, in opening the intake valve so as to allow the intake fluid into the combustion chamber, in opening exhaust valve so as to feed again into this chamber at least part of the burnt gas contained in exhaust pipe; prior to the end of the intake phase, in closing the exhaust valve; in the vicinity of the intake phase end, in closing the intake valve; and during this intake phase, in carrying out at least one fuel injection into the combustion chamber.
摘要:
A circuit for feeding at least one fluid to an internal-combustion engine, notably of Diesel type, includes a circuit (20) for supercharging air to the engine intake, including a supercharging pipe (36), a supercharging device (28) with a compression stage (26) and a compressed air cooling radiator (38), as well as a circuit (22) for recirculating the exhaust gas to the engine intake, including an exhaust gas recirculation pipe (40) and an exhaust gas cooler (46). The feed circuit includes a connecting pipe (50) allowing to connect, upstream from cooler (46), air supercharging circuit (20) and exhaust gas recirculation circuit (22).
摘要:
The present invention relates to a circuit for feeding at least one fluid to an internal-combustion engine, notably of Diesel type, comprising a circuit (20) for supercharging air to the engine intake, including a supercharging pipe (36), a supercharging device (28) with a compression stage (26) and a compressed air cooling radiator (38), as well as a circuit (22) for recirculating the exhaust gas to said engine intake, comprising an exhaust gas recirculation pipe (40) and an exhaust gas cooler (46).According to the invention, the feed circuit comprises a connecting pipe (50) allowing to connect, upstream from cooler (46), air supercharging circuit (20) and exhaust gas recirculation circuit (22).
摘要:
A method facilitates vaporization of a fuel in a direct-injection four-stroke engine including at least one cylinder with a combustion chamber, at least one fluid intake with an intake pipe and a valve, at least one burnt gas exhaust with an exhaust pipe and a valve, a valve controller and fuel injector. The method includes, in the vicinity of the intake phase start, in opening the intake valve so as to allow the intake fluid into the combustion chamber, in opening exhaust valve so as to feed again into this chamber at least part of the burnt gas contained in exhaust pipe; prior to the end of the intake phase, in closing the exhaust valve; in the vicinity of the intake phase end, in closing the intake valve; and during this intake phase, in carrying out at least one fuel injection into the combustion chamber.
摘要:
The present invention relates to a method of controlling the intake of an internal-combustion engine comprising at least two groups (12, 14) of at least one cylinder (C1-C4) wherein a feed is admitted for operation of said engine, and an exhaust line (40, 94, 100) comprising at least one exhaust gas depollution means (42, 96, 102).According to the invention, the method consists, while the engine runs at low speeds and/or at low torques, in evaluating the total feed to be admitted into the cylinders to operate the engine, in admitting a greater proportion of the total feed into one (12) of the groups of cylinders (C1, C4) than in the other (14) group of cylinders (C2, C3) so as to achieve an exhaust gas temperature increase allowing to speed up the rise in temperature of depollution means (42, 96, 102).
摘要:
The invention relates to a method for control of fuel injection for an internal combustion engine, in particular with direct fuel injection, comprising at least one cylinder (10), one piston (30) running in said cylinder, with a projection (34) arranged in a concave bowl (32), a fuel injector (22) and a combustion chamber (26). According to the invention, during high engine loads, a first amount of fuel is injected at a piston (30) position of between 35 and 70° before the top dead centre position of said piston, followed by an injection of at least one second amount of fuel, the first amount of fuel being less than the second amount and the fuel is injected into said combustion chamber by means of an injector (22) with a cone angle (a1) less than or equal to 2Arctg CD/2F where CD is the diameter of the cylinder (10) and F the distance between the points of origin of the fuel jets from the injector (22) and the position of the piston corresponding to a crankshaft angle of 50° with relation to the top dead centre (PMH) of the piston.
摘要翻译:本发明涉及一种用于控制内燃机的燃料喷射的方法,特别是用于直接燃料喷射的方法,包括至少一个气缸(10),一个在所述气缸中运行的活塞(30),其中突出部(34)被布置 在凹槽(32),燃料喷射器(22)和燃烧室(26)中。 根据本发明,在高发动机负载期间,在活塞的上止点位置之前的第35和70°之间的活塞(30)位置处喷射第一量的燃料,然后喷射至少一个第二量 的燃料,第一量的燃料小于第二量,并且燃料通过具有小于或等于2Arctg CD / 2F的锥角(a1)的喷射器(22)注入到所述燃烧室中,其中CD是 气缸(10)的直径,F是来自喷射器(22)的燃料喷嘴的原点和与上止点(PMH)相对应的曲轴角度为50°的活塞的位置之间的距离 )活塞。
摘要:
The invention relates to a method for control of fuel injection for an internal combustion engine, in particular with direct fuel injection, comprising at least one cylinder (10), one piston (30) running in said cylinder, with a projection (34) arranged in a concave bowl (32), a fuel injector (22) and a combustion chamber (26). According to the invention, during high engine loads, a first amount of fuel is injected at a piston (30) position of between 35 and 70° before the top dead centre position of said piston, followed by an injection of at least one second amount of fuel, the first amount of fuel being less than the second amount and the fuel is injected into said combustion chamber by means of an injector (22) with a cone angle (a1) less than or equal to 2Arctg CD/2F where CD is the diameter of the cylinder (10) and F the distance between the points of origin of the fuel jets from the injector (22) and the position of the piston corresponding to a crankshaft angle of 50° with relation to the top dead centre (PMH) of the piston.
摘要翻译:本发明涉及一种用于控制内燃机的燃料喷射的方法,特别是用于直接燃料喷射的方法,包括至少一个气缸(10),一个在所述气缸中运行的活塞(30),其中突出部(34)被布置 在凹槽(32),燃料喷射器(22)和燃烧室(26)中。 根据本发明,在高发动机负载期间,在活塞的上止点位置之前的第35和70°之间的活塞(30)位置处喷射第一量的燃料,然后喷射至少一个第二量 的燃料,第一量的燃料小于第二量,并且燃料通过具有小于或等于2Arctg CD / 2F的锥角(a1)的喷射器(22)注入到所述燃烧室中,其中CD是 气缸(10)的直径,F是来自喷射器(22)的燃料喷嘴的原点和与上止点(PMH)相对应的曲轴角度为50°的活塞的位置之间的距离 )活塞。
摘要:
The present invention relates to a method of controlling the intake of an internal-combustion engine comprising at least two groups (12, 14) of at least one cylinder (C1-C4) wherein a feed is admitted for operation of said engine, and an exhaust line (40, 94, 100) comprising at least one exhaust gas depollution means (42, 96, 102). According to the invention, the method consists, while the engine runs at low speeds and/or at low torques, in evaluating the total feed to be admitted into the cylinders to operate the engine, in admitting a greater proportion of the total feed into one (12) of the groups of cylinders (C1, C4) than in the other (14) group of cylinders (C2, C3) so as to achieve an exhaust gas temperature increase allowing to speed up the rise in temperature of depollution means (42, 96, 102).