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1. 发明公开

EP4293210A1 ZWEITAKTMOTOR 审中-公开
公开(公告)号：EP4293210A1
公开(公告)日：2023-12-20
申请号：EP23177271.6
申请日：2023-06-05
申请人： Andreas Stihl AG & Co. KG
发明人： Grether, Michael , Köhli, Robert , Wirt, Richard , Engel, Bernd
IPC分类号： F02B25/14 , F02B33/04 , F02B25/06 , F02M35/10 , F02B33/44 , F02B75/02
摘要： Ein Zweitaktmotor (1) besitzt einen Zylinder (2), in dessen Zylinderbohrung (22) ein Brennraum (3) ausgebildet ist. Der Brennraum (3) ist von einem hin- und hergehend gelagerten Kolben (5) begrenzt, der eine in einem Kurbelgehäuse (6) drehbar gelagerte Kurbelwelle (8) antreibt. Ein Kurbelgehäuseinnenraum (7) ist über mindestens einen Überströmkanal (14, 15) in mindestens einer Stellung des Kolbens (5) fluidisch mit dem Brennraum (3) verbunden. Der mindestens eine Überströmkanal (14, 15) mündet mit einer Mündungsöffnung (18) in den Kurbelgehäuseinnenraum (7) und mit mindestens einem Überströmfenster (16, 17) an der Zylinderbohrung (22). Es ist vorgesehen, dass alle Überströmkanäle (14, 15) eine von der Mündungsöffnung (18) zum Überströmfenster (16, 17) gemessene mittlere Länge (a 1 , a 2 ) aufweisen, wobei die mittlere Länge (a 1 , a 2 ) bezogen auf den Hub mindestens 1,5 beträgt, und dass das Volumen des Kurbelgehäuseinnenraums (7) einschließlich aller Überströmkanäle (16, 17) bezogen auf den Hubraum höchstens 3,1 beträgt.

2. 发明公开

EP4026989A1 TWO-STROKE INTERNAL COMBUSTION ENGINE 审中-实审
公开(公告)号：EP4026989A1
公开(公告)日：2022-07-13
申请号：EP22158483.2
申请日：2019-12-03
申请人： Emak S.p.A.
发明人： BERTANI, Andrea
IPC分类号： F01L7/12 , F02B25/24 , F02B33/04 , F02B25/14
摘要： A two-stroke internal combustion engine (1) is described, comprising:
- a base (50),
- a head (90) fixed to the base (50) and in which a cylindrical cavity (95) is formed,
- a piston (40) slidably received in the cylindrical cavity (95), so as to define a combustion chamber (110) and a pumping chamber (105), and movable in the cylindrical cavity (95) between a bottom dead center, in which the volume of the combustion chamber (110) is maximum and the volume of the pumping chamber (105) is minimum, and a top dead center, in which the volume of the combustion chamber (110) is minimum and the volume of the pumping chamber (105) is maximum,
- a transfer duct (145) provided with an inlet mouth (150) adapted to be placed in fluid communication with the pumping chamber (105), and with an outlet mouth (155) adapted to be placed in fluid communication with the combustion chamber (110),
- an exhaust duct (160) provided with an inlet mouth (165) adapted to be placed in fluid communication with the combustion chamber (110),
- a crank shaft (10) at least partially housed in the pumping chamber (105),
- a connecting rod (45) adapted to connect the piston (40) to said crank shaft (10), wherein the two-stroke internal combustion engine (1) implements, by means of the movement of the piston (40) between the top dead center and the bottom dead center, an operating step during which the inlet mouth (165) of the exhaust duct (160) and the outlet mouth (155) of the transfer duct (145) are simultaneously in fluid communication with the pumping chamber (105),
said two-stroke internal combustion engine (1) being characterized in that it comprises a movable partition housed inside the pumping chamber (105) and operatively connected to the crank shaft (10) to occlude the inlet mouth (150) of the transfer duct (145) during a first portion of said operating step, and to put in fluid communication the inlet mouth (150) of the transfer duct (145) with the pumping chamber (105) during a second portion of the operating step.

3. 发明授权

EP3460220B1 CONTROL APPARATUS FOR ENGINE 有权转让
公开(公告)号：EP3460220B1
公开(公告)日：2021-04-07
申请号：EP18193934.9
申请日：2018-09-12
发明人： Itano, Ryosuke , Miyata, Toshiyuki , Toda, Hitoshi
IPC分类号： F02D13/02 , F02D41/34 , F02D41/18 , F02B25/14 , F02D41/00

4. 发明公开

EP3495637A1 TWO-STROKE ENGINE WITH IMPROVED PERFORMANCE 审中-公开
公开(公告)号：EP3495637A1
公开(公告)日：2019-06-12
申请号：EP18210441.4
申请日：2018-12-05
申请人： TTI (Macao Commercial Offshore) Limited
发明人： Hoffman, Ronald J
IPC分类号： F02B33/20 , F02B25/14 , F02B33/44 , F02B63/02 , F02B75/02
摘要： A two-stroke engine includes a crankcase (34). A power cylinder (14) extends from the crankcase (34). The power cylinder (14) selectively fluidly communicates with the crankcase (34) to scavenge the power cylinder (14). A power piston (22) is reciprocably disposed in the power cylinder (14). A compressor cylinder (18) extends from the crankcase (34). The compressor cylinder (18) selectively fluidly communicates with the power cylinder (14) to introduce a pressurized air/fuel mixture into the power cylinder (14). A compressor piston (24) is reciprocably disposed in the compressor cylinder (18).

5. 发明公开

EP3434874A1 VERFAHREN ZUM BETREIBEN EINES GROSSDIESELMOTORS, SOWIE GROSSDIESELMOTOR 审中-公开
公开(公告)号：EP3434874A1
公开(公告)日：2019-01-30
申请号：EP17183623.2
申请日：2017-07-27
申请人： Winterthur Gas & Diesel AG
发明人： Schmid, Andreas
IPC分类号： F02B25/14 , F02D19/06 , F02D19/08 , F02D41/30
摘要： Es wird ein Verfahren vorgeschlagen zum Betreiben eines Grossmotors mit mindestens einem Zylinder (2), in welchem ein Kolben (3) entlang einer Zylinderachse (A) zwischen einem unteren und einem oberen Umkehrpunkt hin- und her bewegbar angeordnet ist, bei welchem Verfahren Spülluft (L) für die Verbrennung in den Zylinder (2) eingebracht wird, und nach Beendigung des Einbringens der Spülluft (L) ein erster, flüssiger und fremdgezündeter Brennstoff zur Bildung eines zündfähigen Brennstoff-Luft-Gemisches mittels einer ersten Einspritzdüse (41) in einen von dem Kolben (3) und einem Zylinderdeckel (5) begrenzten Brennraum (6) eingespritzt wird, wobei mit dem Einspritzen des ersten Brennstoffs bei einem ersten Kurbelwinkel begonnen wird, und wobei das Einspritzen bei einem zweiten Kurbelwinkel beendet wird, wobei der erste Kurbelwinkel mindestens 220° und höchstens 340° beträgt. Ferner wird ein Grossmotor vorgeschlagen, der mit einem solchen Verfahren betrieben wird.

6. 发明授权

EP2024628B1 METHOD FOR CONTROLLING A FUEL VALVE AND/OR AN AIR VALVE FOR AN INTERNAL COMBUSTION ENGINE 有权
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.

7. 发明授权

EP2531707B1 TWO-STROKE, FUEL INJECTED INTERNAL COMBUSTION ENGINES FOR UNMANNED AIRCRAFT AND ASSOCIATED SYSTEMS AND METHODS 有权
标题翻译：用于无人飞行器的两冲程燃料喷射式内燃机及相关系统和方法
公开(公告)号：EP2531707B1
公开(公告)日：2018-04-11
申请号：EP11752362.1
申请日：2011-02-04
申请人： Insitu, Inc.
发明人： FFIELD, Paul , SIMMONS, Chuck , STEBBINS, Glen
IPC分类号： F02B25/14 , F02B25/20 , F02B33/04 , F02D41/30
CPC分类号： F02M39/00 , B64D27/08 , F02B25/14 , F02B25/20 , F02B33/04 , F02B2075/025 , F02B2075/125 , F02D35/023 , F02D41/0087 , F02D41/123 , F02D41/1439 , F02D41/1444 , F02D41/222 , F02D41/3058 , F02D2200/0404 , F02D2400/04 , F02M69/10 , Y02T10/123
摘要： Two-stroke, fuel injected internal combustion engines for unmanned aircraft and associated systems and methods are disclosed herein. Engines configured in accordance with embodiments of the disclosure can include, for example, (a) an electronic fuel injection system configured to provide a desired low fuel rate by injecting fuel every nth compression cycle rather than every cycle (so-called "skip-cycle" operation), (b) one or more pressure sensors configured to measure fluctuations in peak crankcase pressure and use such fluctuations to control fuel injection delivery, and (c) a multi-cylinder configuration having a common crankcase with a fuel injection arrangement configured to mitigate or eliminate problems with mixed redistribution.

8. 发明授权

EP2722513B1 Dispositif de commande de moteur à combustion de vehicule automobile à stratégie de balayage ameliorée 有权转让
标题翻译：改进扫描策略的机动车内燃机控制装置
公开(公告)号：EP2722513B1
公开(公告)日：2018-03-07
申请号：EP13185763.3
申请日：2013-09-24
申请人： PSA Automobiles SA
发明人： Vimeux, Sébastien , Lesueur, Jean-Nicolas , Climaud, Pascal , Karrer, Maxime
IPC分类号： F02D41/14 , F02D41/02 , F02B25/14 , F02D13/02 , F02D41/00
CPC分类号： F02D41/0235 , F02B25/145 , F02D13/0261 , F02D41/0002 , F02D41/0007 , F02D41/1454 , F02D2041/001 , F02D2041/0265 , F02D2200/0802 , Y02T10/144 , Y02T10/18 , Y02T10/42

9. 发明授权

EP3006692B1 AIR LEADING-TYPE STRATIFIED SCAVENGING TWO-STROKE INTERNAL-COMBUSTION ENGINE 有权
公开(公告)号：EP3006692B1
公开(公告)日：2017-09-20
申请号：EP15188709.8
申请日：2015-10-07
申请人： Yamabiko Corporation
发明人： YAMAZAKI, Takahiro , OTSUJI, Takamasa , TSUNODA, Hidekazu
IPC分类号： F02B25/14 , F02F3/24
CPC分类号： F02F3/24 , F02B25/02 , F02B25/14 , F02B75/02 , F02B75/16 , F02B2075/025 , F02F1/22 , F02F7/0004
摘要： The efficiency of charging air to a scavenging channel is enhanced by generating a gas flow in a piston groove simultaneously with the piston groove coming into communication with an air port. A piston groove 8 formed in a peripheral surface of a piston includes a pressure transmission through hole 10, and the pressure transmission through hole 10 consistently communicates with a crankcase. In the course of the piston moving up, upon a pressure in the crankcase becoming negative, the negative pressure in the crankcase affects the piston groove 8 through the pressure transmission through hole 10. Consequently, a pressure in the piston groove 8 is released to the crankcase through the pressure transmission through hole 10. Upon the piston moving up and the piston groove 8 being thereby brought into communication with the air port 4a, air enters the piston groove 8 through the air port 4a ((III) of FIG. 1).

10. 发明公开

EP3114334A1 INJECTION SYSTEM FOR TWO-STROKE ENGINES 有权
标题翻译： FJR ZWEITAKTMOTOREN
公开(公告)号：EP3114334A1
公开(公告)日：2017-01-11
申请号：EP16707957.3
申请日：2016-02-03
申请人： Betamotor S.p.A.
发明人： BIANCHI, Lapo , TRASSI, Paolo , TOZZI, Federico , FIASCHI, Jacopo
IPC分类号： F02B25/14 , F02M61/14 , F02M69/10
CPC分类号： F02M69/10 , F02B5/00 , F02B25/14 , F02B75/02 , F02B2075/025 , F02M25/06 , F02M61/145 , F02M69/042
摘要： An electronic injection two-stroke endothermic engine comprising an upper fuel injector (13) and a lower fuel injector (14), both accommodated in an intake duct (12) directly facing the cylinder (1), the latter closed by a head to form a combustion chamber (6) with one or more spark plugs (5) and connected to a pump-crankcase underneath via a plurality of side transfer ports (7, 8) which a central transfer port (15) is added to and crosses said intake duct (12) and allows the fuel sprayed by said lower injector (14) to reach the inside of the cylinder (1).
摘要翻译：一种电子注射二冲程吸热发动机，包括上部燃料喷射器（13）和下部燃料喷射器（14），两者都容纳在直接面向气缸（1）的进气管道（12）中，后者由头部封闭以形成具有一个或多个火花塞（5）的燃烧室（6），并且经由多个侧向传送口（7,8）连接到下面的泵 - 曲轴箱，所述侧向传送端口（7,8）中央传送端口（15）被加入并穿过所述进气口（12），并且允许由所述下部喷射器（14）喷射的燃料到达气缸（1）的内部。

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