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    INTERNAL-COMBUSTION ENGINE HAVING A SYSTEM FOR VARIABLE ACTUATION OF THE INTAKE VALVES, PROVIDED WITH THREE-WAY SOLENOID VALVES, AND METHOD FOR CONTROLLING SAID ENGINE
    2.
    发明申请
    INTERNAL-COMBUSTION ENGINE HAVING A SYSTEM FOR VARIABLE ACTUATION OF THE INTAKE VALVES, PROVIDED WITH THREE-WAY SOLENOID VALVES, AND METHOD FOR CONTROLLING SAID ENGINE 有权
    具有用于可变致动阀的系统的内燃机，具有三路电磁阀，以及用于控制发动机的方法

    公开(公告)号：US20140033997A1

    公开(公告)日：2014-02-06

    申请号：US13891520

    申请日：2013-05-10

    Applicant: C.R.F. SOCIETA CONSORTILE PER AZIONI

    Inventor： Sergio STUCCHI ,  Onofrio DE MICHELE ,  Raffaele RICCO ,  Marcello GARGANO ,  Francesco VATTANEO ,  Domenico LEPORE

    IPC: F02D43/04

    CPC classification number: F02D43/04 ,  F01L1/267 ,  F01L9/025

    Abstract: An internal-combustion engine with two intake valves for each cylinder is provided with a system for variable actuation of the intake valves, including a single solenoid valve for each cylinder that controls communication of a pressurized-fluid chamber of the system with an exhaust channel. The solenoid valve is a three-way, three-position solenoid valve, including an inlet permanently communicating with the pressurized-fluid chamber and with the hydraulic actuator of an intake valve, and two outlets communicating, respectively, with the actuator of the other intake valve and with the exhaust channel. The solenoid valve has a first position, in which the inlet communicates with both of the outlets, a second position, in which the inlet communicates only with the aforementioned outlet connected to the actuator of an intake valve and does not communicate, instead, with the outlet connected to the exhaust channel, and a third position, in which the inlet does not communicate with any of the two outlets.

    Abstract translation: 具有用于每个气缸的两个进气阀的内燃机设置有用于可变地致动进气门的系统，包括用于每个气缸的单个电磁阀，其控制系统的加压流体室与排气通道的连通。 电磁阀是三通三位电磁阀，其包括与加压流体室永久连通的入口和进气阀的液压致动器，以及分别与另一个进气口的致动器连通的两个出口 阀门和排气通道。 电磁阀具有第一位置，其中入口与两个出口连通，第二位置，其中入口仅与连接到进气阀的致动器的上述出口连通，而不是与 出口连接到排气通道，第三位置，其中入口不与两个出口中的任何一个连通。

    Spark ignition internal combustion engine having intake valves with variable actuation and delayed closure
    5.
    发明申请
    Spark ignition internal combustion engine having intake valves with variable actuation and delayed closure 有权
    火花点火内燃机具有可变致动和延迟关闭的进气门

    公开(公告)号：US20140338327A1

    公开(公告)日：2014-11-20

    申请号：US14201223

    申请日：2014-03-07

    Applicant: C.R.F. Societa Consortile per Azioni

    Inventor： Fabio BOREAN ,  Andrea STROPPIANA ,  Sabino LUISI ,  Francesco VATTANEO

    IPC: F01L13/00 ,  F02D43/00

    CPC classification number: F01L13/0015 ,  F01L9/025 ,  F01L2013/0089 ,  F02D13/0226 ,  F02D15/04 ,  F02D43/00 ,  Y02T10/18

    Abstract: A spark-ignition supercharged internal-combustion gasoline engine is equipped with a system for variable actuation of the intake valves including a pressurized fluid chamber set between intake valve and a respective control cam, and an electrically actuated valve, the opening of which vents the pressure chamber so as to cause rapid closing of the valve, as a result of the respective elastic return means, even when the respective cam would tend to keep the valve open. The variable-valve-actuation system is used in combination with control cams of the intake valves shaped in such a way as to generate an intake valve lift profile including a boot portion with substantially constant lift. The boot portion is provided in the final part of the opening cycle of the intake valve, after bottom dead center.

    Abstract translation: 火花点火增压内燃汽油发动机配备有用于可变地致动进气门的系统，包括设置在进气门和相应的控制凸轮之间的加压流体室，以及电致动阀，其开口排出压力 因此，即使当各个凸轮倾向于保持阀门打开时，由于各自的弹性回复装置，致使阀门快速关闭。 可变阀致动系统与进气门的控制凸轮组合使用，其形状为形成包括具有基本恒定升程的靴部分的进气门升程曲线。 在下死点之后，在进气门的打开循环的最后部分中设置护罩部分。

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