Brennkraftmaschine mit Ventiltrieb zur variablen Betätigung der Einlassventile mit Drei-Weg Solenoidventilen und Verfahren zur Kontrolle dieser Brennkraftmaschine in einem "einzigen-Hub" Modus

Details

Veröffentlichungs-Nr.

EP2796675

Aktenzeichen

EP13165631

Anmeldetag

26. April 2013

Veröffentlichung

23. November 2016

Erteilung

23. November 2016

Rechtsraum

EP

IPC

F01L9/02

Abstract

An internal-combustion engine with two intake valves (7A, 7B) for each cylinder is provided with a system for variable actuation of the intake valves, comprising a single solenoid valve for each cylinder that controls communication of the pressurized-fluid chamber (C) of the system with an exhaust channel (23). The solenoid valve is a three-way, three-position solenoid valve, comprising an inlet (i) permanently communicating with the pressurized-fluid chamber and with the hydraulic actuator of an intake valve (7B), and two outlets (ul, u2) communicating, respectively, with the actuator of the other intake valve (7A) and with said exhaust channel. The solenoid valve has a first position (P1), in which the inlet communicates with both of the outlets, a second position (P2), in which the inlet communicates only with the aforesaid outlet (ul) connected to the actuator of an intake valve (7A) and does not communicate, instead, with the outlet (u2) connected to the exhaust channel (23), and a third position (P3), in which the inlet (i) does not communicate with any of the two outlets (ul, u2). There is envisaged an operating mode in which during at least part of the active stroke of the tappet said electrically actuated valve is kept in said third position (P3) so as to render the first intake valve (7B) active, whereas, throughout the active stroke of the tappet, the electrically actuated valve is never brought into said second position (P2) so that said second intake valve (7A) always remains closed.

Anmelder

Firma

C.R.F. Società Consortile per Azioni

Land

🇮🇹 Italien

Fachgebiete