公开(公告)号：US20140318484A1

公开(公告)日：2014-10-30

申请号：US14259189

申请日：2014-04-23

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

Inventor： Sergio STUCCHI ,  Raffaele RICCO ,  Onofrio DE MICHELE ,  Marcello GARGANO ,  Chiara ALTAMURA ,  Carlo MAZZARELLA

IPC: F01L13/00

CPC classification number: F01L13/0015 ,  F01L9/025 ,  F01L13/0005 ,  F01L2001/3443 ,  F01L2800/05

Abstract: An internal-combustion engine includes a three-way, three-position solenoid valve, having an inlet communicating with a pressurized-fluid chamber and with a hydraulic actuator of an intake valve, and two outlets communicating with an actuator of another intake valve of a cylinder and the exhaust channel. The solenoid valve has a first position, in which the inlet communicates with both outlets, a second position, in which the inlet communicates only with the outlet connected to the actuator of the intake valve and a third position, in which the inlet does not communicate with any of the two outlets. During at least part of an active stroke of a tappet, the solenoid valve is kept in the third position to render the first intake valve active. During the active stroke of the tappet, the solenoid valve is never brought into the second position so that the second intake valve always remains closed.

Abstract translation: 内燃机包括三通三位置电磁阀，其具有与加压流体室连通的入口和与进气阀的液压致动器连接的两个出口，以及与另一个进气阀的致动器连通的两个出口 气缸和排气通道。 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门的致动器的出口连通，并且第三位置，入口不连通 与任何两个出口。 在挺杆的主动行程的至少一部分期间，电磁阀保持在第三位置以使第一进气阀起作用。 在挺杆的主动行程期间，电磁阀不会进入第二位置，使得第二进气门总是保持关闭。

公开(公告)号：US20210164368A1

公开(公告)日：2021-06-03

申请号：US17108188

申请日：2020-12-01

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

Inventor： Raffaele RICCO ,  Sergio STUCCHI ,  Marcello GARGANO ,  Domenico LEPORE ,  Chiara ALTAMURA

IPC: F01L9/04 ,  F01L1/46 ,  F01L1/047 ,  F01L1/14 ,  F02D13/02 ,  F02B23/10

Abstract: In an internal combustion engine provided with an electro-hydraulic system for variable actuation of the intake valves of the engine, each cylinder has two intake valves, which are associated with two intake conduits and are controlled by a single cam of a camshaft through a single hydraulic circuit. The communication of the hydraulic actuators of the two intake valves with a discharge channel is controlled by two electrically-actuated control valves, both of an on/off two-position type, arranged in series with each other along a hydraulic line for communication between the a pressure volume and the discharge channel.

公开(公告)号：US20150034031A1

公开(公告)日：2015-02-05

申请号：US14334955

申请日：2014-07-18

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

Inventor： Sergio STUCCHI ,  Raffaele RICCO ,  Onofrio DE MICHELE ,  Marcello GARGANO ,  Carlo MAZZARELLA ,  Chiara ALTAMURA

IPC: F01L13/00 ,  F01L1/14

CPC classification number: F01L13/0031 ,  F01L1/14 ,  F01L9/025 ,  F01L2001/3443 ,  F16K31/0655

Abstract: An internal-combustion engine includes a system for variable actuation of intake valves, including a control valve for each cylinder, which controls communication of a pressurized-fluid chamber with a discharge channel. The control valve has at least three different positions, namely, a first completely open position, a second partially open position, and a third completely closed position. Electronic control means are programmed for keeping the control valve in its closed position in operating stages in which the intake valve must remain coupled to the respective cam and for bringing the control valve from its completely closed position to its partially open position or to its completely open position in operating stages in which the intake valve must be uncoupled from the respective cam, selection between the first position and said second position of the control valve being made as a function of one or more operating parameters of the engine.

Abstract translation: 内燃机包括用于可变致动进气门的系统，包括用于每个气缸的控制阀，其控制加压流体室与排放通道的连通。 控制阀具有至少三个不同的位置，即第一完全打开位置，第二部分打开位置和第三完全关闭位置。 电子控制装置被编程用于在操作阶段将控制阀保持在其关闭位置，在该阶段中，进气门必须保持联接到相应的凸轮并且使控制阀从其完全关闭位置到其部分打开位置或完全打开 进气阀必须与相应的凸轮分离的操作阶段的位置，作为控制阀的第一位置和第二位置之间的选择作为发动机的一个或多个操作参数的函数。

公开(公告)号：US20170175592A1

公开(公告)日：2017-06-22

申请号：US15366727

申请日：2016-12-01

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

Inventor： Sergio STUCCHI ,  Raffaele RICCO ,  Marcello GARGANO ,  Onofrio DE MICHELE ,  Chiara ALTAMURA ,  Domenico LEPORE

IPC: F01L1/24 ,  F16H25/14 ,  F16H25/10 ,  F01L1/047 ,  F01L1/46

CPC classification number: F01L1/24 ,  F01L1/047 ,  F01L1/462 ,  F01L9/023 ,  F01L9/025 ,  F01L2001/2444 ,  F01L2800/19 ,  F16H25/10 ,  F16H25/14

Abstract: A system for variable actuation of an engine valve of an engine includes a master piston driven by a cam of a camshaft. A slave piston is driven by the master piston by a volume of pressurized fluid. The slave piston causes the engine valve to open, against the action of a spring. A control valve controls a communication between pressurized fluid and an environment at lower pressure, with which a fluid accumulator is in communication. A control unit is programmed for controlling the control valve according to one or more different valve modes. When one of these valve modes is actuated, the control valve opens the communication in advance with respect to the end of the lift cycle of the cam, and not after closing of the engine valve to prevent or reduce a decrease in pressure in the volume of pressurized fluid after closing of the engine valve.

公开(公告)号：US20140346258A1

公开(公告)日：2014-11-27

申请号：US14285220

申请日：2014-05-22

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

Inventor： Sergio STUCCHI ,  Raffaele RICCO ,  Onofrio DE MICHELE ,  Marcello GARGANO ,  Domenico LEPORE ,  Chiara ALTAMURA

IPC: F16K11/044 ,  F16K31/06 ,  F02M61/04 ,  F16K31/00

CPC classification number: F16K11/044 ,  F02M47/043 ,  F02M47/046 ,  F02M61/04 ,  F02M63/0007 ,  F02M63/0026 ,  F02M63/0045 ,  F02M63/0049 ,  F02M2200/21 ,  F16K11/10 ,  F16K31/007 ,  F16K31/008 ,  F16K31/061 ,  F16K31/0624 ,  Y10T137/86919

Abstract: An electrically actuated control valve has three mouths and three operating positions, in which the three mouths includes a first mouth for inlet of a working fluid, and a second mouth and a third mouth for outlet of the working fluid. The three operating positions include a first operating position in which a passage of fluid from the first mouth to the second mouth and the third mouth is enabled, a second operating position in which a passage of fluid from the first mouth to only one of said second and third mouths is enabled, and a third operating position in which the passage of fluid from the first to the second mouth and the third mouth is disabled. The control valve includes an electric or electromagnetic actuator for controlling the passage of fluid from the first mouth to the second and third mouths providing the aforesaid three operating positions.

Abstract translation: 电动控制阀具有三个口和三个操作位置，其中三个口包括用于工作流体入口的第一口，以及用于工作流体出口的第二口和第三口。 三个操作位置包括第一操作位置，在该第一操作位置中，流体从第一口到第二口和第三口能够通过;第二操作位置，其中流体从第一口到所述第二口中的一个通过 并且第三口被启用，并且第三操作位置，其中流体从第一口到第二口和第三口的通过被禁用。 控制阀包括电动或电磁致动器，用于控制流体从第一口到达第二和第三口的通道，从而提供上述三个操作位置。