公开(公告)号：US20180080423A1

公开(公告)日：2018-03-22

申请号：US15711671

申请日：2017-09-21

申请人： C.R.F. SOCIETÀ CONSORTILE PER AZIONI

发明人： Sergio Stucchi ,  Raffaele Ricco ,  Onofrio De Michele ,  Marcello Gargano ,  Carlo Mazzarella ,  Domenico Lepore

IPC分类号： F02M61/18 ,  F02M61/10

摘要： An atomizer of a fuel electro-injector is equipped with a nozzle and a valve needle having a head, which is coupled to a sealing seat of the nozzle, and stem, which engages an inner seat of the nozzle; the stem and the nozzle define an annular passageway with a chamber that axially terminates at the sealing seat; the stem has an intermediate portion coupled in an axially sliding manner in the inner seat and defining a plurality of channels, the outlets of which are arranged on the annular chamber; the sealing seat and the head of the valve needle define a discharge section, which is annular and has a width that increases as the opening stroke of the valve needle proceeds; the ratio between the depth and the outer chord of the minimum cross-section of the channels is greater than or equal to two.

公开(公告)号：US11692465B2

公开(公告)日：2023-07-04

申请号：US17621823

申请日：2020-08-06

申请人： C.R.F. Società Consortile per Azioni

发明人： Raffaele Ricco ,  Sergio Stucchi ,  Carlo Mazzarella ,  Onofrio De Michele

IPC分类号： F01L9/14 ,  F01L1/26 ,  F02D13/02 ,  F01L9/40 ,  F02D41/00 ,  F01L1/25 ,  F01L1/053 ,  F01L13/00 ,  F01L1/46

CPC分类号： F01L9/14 ,  F01L1/267 ,  F01L9/40 ,  F02D13/0226 ,  F02D13/0257 ,  F01L1/053 ,  F01L1/25 ,  F01L1/462 ,  F01L2013/101 ,  F01L2800/06 ,  F01L2820/031 ,  F02D2041/001 ,  F02D2041/0015

摘要： An internal combustion engine includes an electro-hydraulic system for variable actuation of intake valves where each cylinder has two intake valves, associated with two intake conduits. A first conduit is generates within the cylinder a tumble motion of airflow introduced therein, when the intake valve associated thereto is at least partially opened. The second intake conduit generates within the cylinder a swirl motion of airflow introduced therein when the second intake valve is at least partially opened. A controller of controls one or more control valves to open only one of the intake valves of each cylinder in a condition of reduced engine operation, below a predetermined load and/or a predetermined speed of the engine, and to always open both intake valves in the remaining conditions of engine operation. The first intake valve is the only valve to be opened in the reduced engine operation condition.

公开(公告)号：US10156163B2

公开(公告)日：2018-12-18

申请号：US15280577

申请日：2016-09-29

申请人： C.R.F. Società Consortile per Azioni

发明人： Sergio Stucchi ,  Raffaele Ricco ,  Marcello Gargano ,  Onofrio De Michele ,  Carlo Mazzarella

IPC分类号： F01L1/25 ,  F02D13/02 ,  F01L9/02 ,  F01L1/053

摘要： A system for variable actuation of an engine valve of an internal-combustion engine includes a master piston and a slave piston, driven by the master piston. A control valve controls a communication of a volume of a pressurized fluid with a lower pressure environment, which is connected to a fluid accumulator, and an electronic control unit controls the electrically operated control valve. A device for dampening pressure oscillations is connected to the volume of pressurized fluid and includes an additional volume adapted for receiving fluid from the volume of pressurized fluid only when, following upon oscillations of the pressure in the volume of pressurized fluid, the pressure exceeds a maximum threshold value, which is higher than a mean pressure value that is set up in the volume of pressurized fluid when the master piston drives the slave piston in normal operating conditions.