公开(公告)号：EP0799377B1

公开(公告)日：2001-10-31

申请号：EP95918821.0

申请日：1995-05-05

申请人： AKTIEBOLAGET ELECTROLUX

发明人： PETERSSON, Ulf

IPC分类号： F02M17/14

CPC分类号： F02B33/04 ,  F02M17/14 ,  F02M69/147 ,  Y10S261/21

摘要： A method and a device of controlling the amount of fuel delivered to a combustion engine (1), e.g. of two-stroke or four-stroke type, wherein the fuel is supplied through an intake passage (2) intended to deliver air (3) and fuel (4) to the cylinder (5), said intake passage being opened and closed by a piston (6) or by a special valve (7). The fuel supply to the intake passage (2) is effected upstream from the piston (6) or the valve (7) and in response to the opening and closing of the intake passage (2) varying flow speeds and pressures are produced in the passage and the fuel supply system (8) is of a kind the supply amount of which is substantially affected by this variation, such as a carburetor (9) or a low-pressure injection system (10). In order to regulate the fuel supply to the engine fuel a brief cut-off takes place in the fuel-supply system (8) of the entire fuel flow or part flow and the brief cut-off is arranged to take place to an essential extent during a part of the engine revolution when the intake passage is closed and the fuel supply accordingly is reduced or has ceased.

公开(公告)号：EP2024628B1

公开(公告)日：2018-12-26

申请号：EP07748127.3

申请日：2007-05-14

申请人： Husqvarna AB

发明人： CARLSSON, Bo ,  LARSSON, Mikael

IPC分类号： F02M17/14 ,  F02M69/28 ,  F02B25/14 ,  F02B33/04

CPC分类号： F02B25/14 ,  F02B33/04 ,  F02B2075/025 ,  F02M17/14 ,  F02M69/10

摘要： A method for controlling a valve of a crank case scavenged internal combustion engine includes determining a valve control sequence, wherein the valve is controlled in consecutive periods of revolutions each having a period length of at least ten revolutions, and controlling the valve according to the valve control sequence to adjust the ratio of fuel to air in a combustible mixture delivered to an engine combustion chamber. Determining the valve control sequence for each period includes providing a number of valve shut-off positions, wherein the number of valve shut-off positions corresponds to an amount of fuel or air to be supplied to the engine during the corresponding period, and determining which revolutions of the period that the valve is to be closed.

公开(公告)号：EP2786006A1

公开(公告)日：2014-10-08

申请号：EP12799243.6

申请日：2012-11-27

申请人： Vepec Limited

发明人： LAWES, Keith

IPC分类号： F02M17/16 ,  F02M17/14

CPC分类号： F02M17/16 ,  F02M7/12 ,  F02M17/14

摘要： A carburettor incorporating an air passage (5), and a fuel passage (3), and a rotating barrel (4), the rotating barrel (4) being arranged between the air passage (5) and the fuel passage (3) so that a first portion of its surface is exposed to the air passage (5), and a second portion of its surface is exposed to the fuel passage (3). The rotation of the barrel (4) transfers fuel from fuel passage (3) to the air passage (5) via an indent feature (6), the proportion of that indent feature 6 that is exposed to the air or fuel passage being varied to meter the amount of fuel transferred.

公开(公告)号：EP1353058A2

公开(公告)日：2003-10-15

申请号：EP03006885.2

申请日：2003-03-31

申请人： VEMAC GmbH & Co.KG

发明人： Adolph, Norbert, Dr.-Ing. ,  Düsterhöft, Martin, Dr.-Ing.

IPC分类号： F02M17/14

CPC分类号： F02M17/147

摘要： Für Otto-Motore wird ein Vergaser angegeben, der an erforderliche Motorleistungen flexibel anpassbar ist. Der Vergaser weist einen Lufttrichter (Fig.1, (1)) zum Ansaugen von Brennstoff aus einer in den Lufttrichter mündenden Brennstoffleitung (3) auf, die an einer Brennstoffkammer (5) angeschlossen ist und zwischen der Brennstoffkammer und ihrer Mündung (4) im Lufttrichter eine Brennstoffdüse (7) zur Einstellung der anzusaugenden Brennstoffmenge aufweist. Der Brennstoff wird aufgrund von Unterdruck im Lufttrichter aus der Brennstoffkammer abgesaugt. Um schädliche Abgasemissionen zu vermindern und Energieverluste für das Gesamtsystem zu vermeiden, weist die Brennstoffdüse (7) einen mittels eines piezoelektrischen Aktuators (8) veränderbaren Strömungsquerschnitt auf. Mit dem piezoelektrischen Aktuator lässt sich der Stromungsquerschnitt sehr feinfühlig einstellen. Im Ausführungsbeispiel nach Figur 1 steht der Aktuator mit Stellglied (10) in Wirkverbindung. Der Aktuator reagiert unmittelbar auf sich verändernde Regelwerte. Von wesentlichem Vorteil ist insbesondere die in Zusammenhang mit Kleinmotoren gegebene Betriebssicherheit. Der piezoelektrische Aktuator (8) kann als Biegewändler oder als piezoelektrische Membran oder als in axialer Richtung wirksamer Aktuator ausgebildet sein.

摘要翻译： 该装置具有用于从通向漏斗中的燃料管线（3）感应燃料的空气漏斗（1），并连接到燃料室和燃料室（5）之间，燃料喷嘴（7） ），用于根据空气漏斗中的真空设定能够从燃料室吸入的燃料量。 燃料喷嘴具有能够通过压电致动器（8）变化的流动横截面。

公开(公告)号：EP2613045A1

公开(公告)日：2013-07-10

申请号：EP13150712.1

申请日：2013-01-09

申请人： I.C.P. S.r.l.

发明人： Razzano, Tancredi

IPC分类号： F02M17/14 ,  F02M71/00

CPC分类号： F02D41/30 ,  F02D41/22 ,  F02M17/147 ,  F02M71/00

摘要： A supply system (1), for supplying an internal combustion engine (3) with air and fuel, is provided with a first fuel supply circuit (18), having at least one electro-injector (17) controlled by an electronic unit (16), an intake conduit (5) conveying combustion air, a throttle valve (10) in the intake conduit (5), and a second fuel supply circuit (20), activated in the event of failure and having a nozzle (25) that atomizes fuel due to a depression in the intake conduit (5); a fuel flow rate adjusting valve (27) varies the flow rate exiting from the nozzle (25), under the operation of a mechanical transmission (28), according to the operation of the throttle valve (10).

摘要翻译： 一种用于向内燃机（3）供应空气和燃料的供应系统（1）设置有第一燃料供应回路（18），其具有由电子单元（16）控制的至少一个电喷射器（17） ），输送燃烧空气的进气管道（5），进气管道（5）中的节流阀（10）以及在故障情况下被激活并具有喷嘴（25）的第二燃料供应回路（20） 由于吸入管道（5）中的凹陷而使燃料雾化; 根据节流阀（10）的操作，燃料流量调节阀（27）根据机械变速器（28）的操作改变从喷嘴（25）排出的流量。

公开(公告)号：EP2024628A1

公开(公告)日：2009-02-18

申请号：EP07748127.3

申请日：2007-05-14

申请人： Husqvarna AB

发明人： CARLSSON, Bo ,  LARSSON, Mikael

IPC分类号： F02M17/14 ,  F02M69/28

CPC分类号： F02B25/14 ,  F02B33/04 ,  F02B2075/025 ,  F02M17/14 ,  F02M69/10

摘要： A method for controlling a valve of a crank case scavenged internal combustion engine includes determining a valve control sequence, wherein the valve is controlled in consecutive periods of revolutions each having a period length of at least ten revolutions, and controlling the valve according to the valve control sequence to adjust the ratio of fuel to air in a combustible mixture delivered to an engine combustion chamber. Determining the valve control sequence for each period includes providing a number of valve shut-off positions, wherein the number of valve shut-off positions corresponds to an amount of fuel or air to be supplied to the engine during the corresponding period, and determining which revolutions of the period that the valve is to be closed.