公开(公告)号：US10544756B2

公开(公告)日：2020-01-28

申请号：US15626610

申请日：2017-06-19

申请人： Meiying Xue

发明人： Meiying Xue

IPC分类号： F02M13/08 ,  F02M19/04 ,  F02M19/08 ,  F02M7/14 ,  F02B25/20 ,  F02M7/18

摘要： A dual fuel carburetor includes a carburetor body, a main jet pipe and a float chamber housing to form a float chamber, the needle valve device includes a pushing needle and a needle valve base, the pushing needle is movably inserted in the float chamber housing, and a window is formed at a bottom of the float chamber housing, the needle valve device further includes a sealed corrugated sleeve positioned around the pushing needle, which has a first end hermetically connected with the pushing needle and a second end hermetically connected with the float chamber housing, a driving spring is positioned around the pushing needle, and the pushing needle has a driving end extended out from the float chamber housing and opposite to that end cooperated with the valve base hole. The needle valve device is in a reasonable design to obtain mechanical controls or other automated drive controls.

公开(公告)号：US20190101050A1

公开(公告)日：2019-04-04

申请号：US15723846

申请日：2017-10-03

申请人： POLARIS INDUSTRIES INC.

发明人： James A Barczak ,  Lawrence J. Hosaluk ,  Dallas J. Blake ,  Darren J. Hedlund

IPC分类号： F02B25/20 ,  F02B75/02 ,  F02F1/24 ,  F02B25/14

摘要： A two cycle engine having a block defining an exhaust port and a cylinder, a head, and a piston defining a combustion chamber is disclosed. The exhaust port has a resonant frequency that causes a portion of the combusted and uncombusted exhaust gasses to flow from the exhaust system and back into the combustion chamber. At a speed above the predetermined speed, a majority of the portion of the combusted and uncombusted exhaust gasses flows from the exhaust system and back into the combustion chamber without engaging the skirt of the piston.

公开(公告)号：US10113452B2

公开(公告)日：2018-10-30

申请号：US15419175

申请日：2017-01-30

申请人： BRP-ROTAX GMBH & CO. KG

发明人： Andreas Matheis ,  Markus Doppelbauer ,  Martin Schallauer ,  Christian Berger ,  Guenther Roland

IPC分类号： F02B27/02 ,  F01L3/20 ,  F01L1/02 ,  F02B75/02 ,  F02B77/04 ,  F02B25/20 ,  F02B33/04 ,  F01L1/38 ,  F01L5/20 ,  F02D13/02

摘要： An exhaust valve assembly for a two-stroke internal combustion engine has a valve actuator, and a two-part valve having a primary and secondary valves defining first and second decompression passages respectively. The primary valve is operatively connected to the valve actuator. The primary valve is in first, second and third primary valve positions when the valve actuator is in first, second and third actuator positions respectively. The secondary valve is in a first secondary valve position when the valve actuator is in the first or the second actuator position and in a second secondary valve position when the valve actuator is in the third actuator position. The first and second valve decompression passages fluidly communicate with each other when the valve actuator is in the second actuator position, and are fluidly separate from each other when the valve actuator is the first or the third actuator position.

公开(公告)号：US09903314B2

公开(公告)日：2018-02-27

申请号：US14715623

申请日：2015-05-19

申请人： Yamabiko Corporation

发明人： Shirou Yamaguchi ,  Takamasa Otsuji

IPC分类号： F02M17/12 ,  F02M35/10 ,  F02B17/00 ,  F02B25/02 ,  F02B25/16 ,  F02B25/20 ,  F02B25/22 ,  F02M11/02 ,  F02M19/00 ,  F02M35/108 ,  F02B63/02

CPC分类号： F02M17/12 ,  F02B17/00 ,  F02B25/02 ,  F02B25/16 ,  F02B25/20 ,  F02B25/22 ,  F02B63/02 ,  F02M11/02 ,  F02M19/00 ,  F02M35/1019 ,  F02M35/10196 ,  F02M35/10255 ,  F02M35/10262 ,  F02M35/108 ,  Y02T10/146

摘要： The present invention is to prevent mixing of fresh air and an air-fuel mixture when a throttle valve is fully opened and increase a delivery ratio. A main nozzle (30) is surrounded by a tunnel-like air flow guiding member (52). The air flow guiding member (52) is opened at its front and back sides. A whole amount of fuel discharged via a main nozzle (30) is sent to a downstream side by an air flow created by the air flow guiding member (52). When a throttle valve (22) and a choke valve (24) are both in a fully-opened state, fresh air flows into an air-fuel mixture passage (12) through a gap between these valves (22, 24).

公开(公告)号：US09512806B2

公开(公告)日：2016-12-06

申请号：US14299760

申请日：2014-06-09

申请人： Andreas Stihl AG & Co. KG

发明人： Gerhard Osburg

IPC分类号： F02M1/02 ,  F02B25/20 ,  F02M19/10 ,  F02M19/12

CPC分类号： F02M1/02 ,  F02B25/20 ,  F02M19/10 ,  F02M19/124

摘要： An internal combustion engine has a supply channel supplying combustion air. A throttle element is arranged in the supply channel and the position of the throttle element is adjustable by an operator-controlled element. The engine has a starter device which has an operating position and a starting position. In the starting position, the starter device opens up a defined flow cross section in the supply channel. The starter device locks in the starting position. The locking is released by actuation of the operator-controlled element. To achieve good starting performance of the engine, the engine has an intermediate stop which, upon the first actuation of the operator-controlled element after the release of the locking, is active and prevents the throttle element from opening fully, and which, during the subsequent closing movement of the throttle element, is deactivated such that the throttle element can be opened fully.

摘要翻译： 内燃机具有供给燃烧空气的供给通道。 节流元件布置在供应通道中，并且节流元件的位置由操作者控制的元件调节。 发动机具有起动装置，其具有操作位置和起始位置。 在起始位置，起动装置在供给通道中打开一个限定的流动截面。 起动装置锁定在起始位置。 通过操作者控制的元件的致动释放锁定。 为了实现发动机的良好启动性能，发动机具有中间止挡件，其在释放锁定之后在操作者控制元件的第一次致动时是有效的并且防止节流元件完全打开，并且在 节流元件的后续关闭运动被停用，使得节流元件可以完全打开。

公开(公告)号：US08967099B2

公开(公告)日：2015-03-03

申请号：US13327020

申请日：2011-12-15

申请人： Michael Grether ,  Niels Kunert ,  Tommy Roitsch ,  Klaus Geyer

发明人： Michael Grether ,  Niels Kunert ,  Tommy Roitsch ,  Klaus Geyer

IPC分类号： F02B25/00 ,  F02B25/20 ,  F02M3/14 ,  F02M35/10 ,  F02B25/14 ,  F02M3/08 ,  F02M29/04 ,  F02M33/04 ,  F02B75/02 ,  F02B33/04 ,  E02D7/12 ,  F02B61/04 ,  F02F1/22

CPC分类号： F02B25/20 ,  E02D7/125 ,  F02B25/14 ,  F02B33/04 ,  F02B61/045 ,  F02B2075/025 ,  F02F1/22 ,  F02M3/08 ,  F02M3/14 ,  F02M29/04 ,  F02M33/046 ,  F02M35/10321 ,  Y02T10/126

摘要： A two stroke engine comprises a cylinder, in which a combustion chamber bounded by a piston is formed, and an intake passage. A carburetor forms a section of the intake passage, within which a throttle element is mounted pivotably, and at least one main fuel opening and at least one idling fuel opening open into the intake passage, which is divided downstream of the carburetor into an air passage and a mixture passage. The idling fuel opening feeds a secondary passage arranged within the mixture passage. In the idling position, the throttle element may be arranged adjacent to the upstream entry opening in the secondary passage, and the throttle element may have an opening which, in the idling position of the throttle element, is arranged in the region of the entry opening and connects the secondary passage to that region of the intake passage located upstream of the throttle element.

摘要翻译： 二冲程发动机包括形成有由活塞界定的燃烧室的气缸和进气通道。 化油器形成进气通道的一部分，其中节流元件可枢转地安装在其中，并且至少一个主燃料开口和至少一个空转燃料开口通向进气通道，该进气通道在化油器的下游分配成空气通道 和混合物通道。 空转燃料开口供给布置在混合通道内的次级通道。 在怠速位置，节气门元件可以布置成与次级通道中的上游入口相邻，并且节流元件可以具有在节流元件的空转位置处布置在入口开口的区域中的开口 并且将次级通道连接到位于节流元件上游的进气通道的区域。

公开(公告)号：US06976458B2

公开(公告)日：2005-12-20

申请号：US10948226

申请日：2004-09-24

申请人： Gerhard Osburg ,  Wolfgang Luithardt

发明人： Gerhard Osburg ,  Wolfgang Luithardt

IPC分类号： F02B25/14 ,  F02B25/16 ,  F02B25/20 ,  F02B75/02 ,  F02B33/04

CPC分类号： F02B25/14 ,  F02B25/20 ,  F02B2075/025

摘要： A two-stroke engine (1) has a combustion chamber (3) configured in a cylinder (2). The combustion chamber (3) is delimited by a reciprocating piston (5) and drives a crankshaft (7) which is rotatably journalled in a crankcase (4). The two-stroke engine (1) has an outlet (10) out of the combustion chamber (3) and at least one transfer channel (12, 15) which connects the crankcase (4) to the combustion chamber (3) at pregiven piston positions. The transfer channels (12, 15) open with transfer windows (13, 16) into the combustion chamber (3). To obtain a good start and good idle performance and low exhaust-gas values, an ancillary channel (14) is provided which is connected into the combustion chamber (3) at one end (37) and into the transfer channel (15) with the other end (36). During operation, the ancillary channel (14) opens into the combustion chamber (3) during the downward stroke of the piston (5) while the transfer window (16) to the combustion chamber (3) is still closed.

摘要翻译： 二冲程发动机（1）具有构造在气缸（2）中的燃烧室（3）。 燃烧室（3）由往复活塞（5）限定，驱动曲轴（7），该曲轴（7）可旋转地支承在曲轴箱（4）中。 二冲程发动机（1）具有从燃烧室（3）出口的出口（10）和至少一个传递通道（12,15），其在预定活塞处将曲轴箱（4）连接到燃烧室（3） 职位 传送通道（12,15）打开，传送窗口（13,16）进入燃烧室（3）。 为了获得良好的起动和良好的怠速性能和低排气值，提供了辅助通道（14），其在一端（37）处连接到燃烧室（3）中并且与传导通道（15）连接 另一端（36）。 在操作期间，在活塞（5）的向下冲程期间，辅助通道（14）进入燃烧室（3），而到燃烧室（3）的转移窗口（16）仍然是关闭的。

公开(公告)号：US06932032B2

公开(公告)日：2005-08-23

申请号：US10986115

申请日：2004-11-12

申请人： Andreas Lingen ,  Matthias Hehnke ,  Joachim Baumhauer ,  Andreas Bähner ,  Michael Joos ,  Axel Klimmek ,  Hans Holderle

发明人： Andreas Lingen ,  Matthias Hehnke ,  Joachim Baumhauer ,  Andreas Bähner ,  Michael Joos ,  Axel Klimmek ,  Hans Holderle

IPC分类号： F02B25/20 ,  F02B33/04 ,  F02B63/02 ,  F02B75/02 ,  F02D9/02 ,  F02M35/108

CPC分类号： F02D9/109 ,  F02B25/20 ,  F02B33/04 ,  F02B63/02 ,  F02B2075/025 ,  F02D2009/0279 ,  F02M35/1019 ,  F02M35/108

摘要： A two-stroke engine (1) has a combustion chamber (3) disposed in a cylinder (2). The combustion chamber (3) is delimited by a reciprocating piston (5). The piston (5) drives a crankshaft (7) via a connecting rod (6) and the crankshaft (7) is rotatably journalled in a crankcase (4). The two-stroke engine (1) has an intake channel (8) for the supply of fuel into the crankcase (4), an outlet (13) for exhaust gases from the combustion chamber (3) and an air channel (10) for the supply of substantially fuel-free air. A throttle element (18) is mounted in the air channel (10). At pregiven positions of the piston (5), the crankcase (4) is connected via at least one transfer channel (14) to the combustion chamber (3). In order to prevent air from being drawn by suction into the air channel because of leakages during idle or at low rpm, a fluid connection is provided between the air channel (10) downstream of the throttle element (18) and the crankcase (4) for underpressure compensation which connection is present at least partially for a position of the piston from 90° ahead of bottom dead center to 90° after bottom dead center. A connection between the crankcase (4) and the intake channel (8) can be provided in lieu of, or in addition to, the connection to the air channel (10).

摘要翻译： 二冲程发动机（1）具有设置在气缸（2）中的燃烧室（3）。 燃烧室（3）由往复活塞（5）限定。 活塞（5）通过连杆（6）驱动曲轴（7），曲轴（7）可旋转地支承在曲轴箱（4）中。 二冲程发动机（1）具有用于向曲轴箱（4）供应燃料的进气通道（8），用于来自燃烧室（3）的废气的出口（13）和用于 供应基本上无燃料的空气。 节流元件（18）安装在空气通道（10）中。 在活塞（5）的预制位置，曲轴箱（4）经由至少一个输送通道（14）连接到燃烧室（3）。 为了防止由于怠速或低转速下的泄漏而吸入空气而吸入空气，在节气门元件（18）下游的空气通道（10）和曲轴箱（4）之间设有流体连接， 对于负压补偿，至少部分地将活塞的位置从下死点之前90°至下死点之后的90°存在。 可以提供曲轴箱（4）和进气通道（8）之间的连接来代替或除了与空气通道（10）的连接。

公开(公告)号：US6155374A

公开(公告)日：2000-12-05

申请号：US213601

申请日：1998-12-17

申请人： Yoshiaki Uchida

发明人： Yoshiaki Uchida

IPC分类号： F02P1/02 ,  F02B25/20 ,  F02D9/04 ,  F02D11/10 ,  F02D13/02 ,  F02D17/00 ,  F02D45/00 ,  B60K13/04

CPC分类号： F02D13/0249 ,  F02D13/0284 ,  Y02T10/18

摘要： A snowmobile is powered by an internal combustion engine. The engine has an exhaust timing control valve, a control unit and a generator. The control unit determines the positioning of the control valve as a function of engine speed. Additionally, the control unit initiates a control valve cleaning cycle when the engine speed first exceeds a first predetermined speed within a predetermined range of engine speeds. The first predetermined speed is desirably an engine speed at which the generator generates sufficient power to render the control unit operable. The control unit retracts the control valve when the engine speed exceeds the upper limit of the predetermined range. Thereafter, the control unit initiates another control valve cleaning cycle when the engine speed decreases below a second predetermined engine speed.

公开(公告)号：US6112708A

公开(公告)日：2000-09-05

申请号：US255233

申请日：1999-02-22

申请人： Toshiharu Sawada ,  Hiroshi Kato ,  Takeshi Watanabe

发明人： Toshiharu Sawada ,  Hiroshi Kato ,  Takeshi Watanabe

IPC分类号： F02B33/04 ,  F02B17/00 ,  F02B25/16 ,  F02B25/20 ,  F02B25/22 ,  F02B63/02 ,  F02B75/02 ,  F02M11/00 ,  F02M19/00 ,  F02M35/10

CPC分类号： F02B63/02 ,  F02B17/00 ,  F02B25/22 ,  F02B2075/025

摘要： A stratified scavenging two-cycle engine, which enables a reduction in size and an improvement in productivity, includes a carburetor (6), which is provided between an air cleaner (7) and a suction fitting (4), wherein a mixture flow passage (6B) and an air flow passage (6A) are formed in the carburetor at least generally in parallel with each other, an air control valve (6a) is disposed in the air flow passage in the carburetor, and a mixture control valve (6b) is disposed in the mixture flow passage in the carburetor so that the carburetor and the valves (6a and 6b) constitute a single unit. The suction fitting (4), which is provided between the carburetor (6) and the closest outer face of the cylinder block (2), is a single piece and contains an air flow passage (4a), which is fluidly connected to the air flow passage (6A) in the carburetor (6) and to scavenging ports (2a) in the cylinder block, and a mixture flow passage (4b), which is fluidly connected to the mixture flow passage (6B) in the carburetor (6) and to a chamber in a crankcase (3).

摘要翻译： 一种能够减小尺寸并提高生产率的分层清扫双循环发动机包括设置在空气滤清器（7）和抽吸配件（4）之间的化油器（6），其中混合物流动通道 （6B）和气流通道（6A）在化油器中至少大致平行地形成，空气调节阀（6a）设置在化油器的空气流动通道中，混合调节阀（6b） ）设置在化油器的混合流路中，使得化油器和阀（6a和6b）构成一个单元。 设置在化油器（6）与气缸体（2）的最近的外表面之间的吸入配件（4）是单件式的并且包含流体连接到空气的空气流动通道（4a） 在化油器（6）中的流路（6A）和汽缸体中的清扫口（2a），以及与化油器（6）中的混合流路（6B）流体连接的混合流路（4b） 以及曲轴箱（3）中的室。