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1. 发明授权

US4294213A Fuel supplying device for use in fuel injection type internal combustion engine 失效
标题翻译：用于燃油喷射型内燃机的燃料供应装置
公开(公告)号：US4294213A
公开(公告)日：1981-10-13
申请号：US56310
申请日：1979-07-10
申请人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Junzo Uozumi , Tsuneo Ando , Yuzo Takeuchi , Mikio Minoura
发明人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Junzo Uozumi , Tsuneo Ando , Yuzo Takeuchi , Mikio Minoura
IPC分类号： F02D3/02 , F02M69/00 , F02M69/22 , F02M69/32 , F02M69/38 , F02M39/00
CPC分类号： F02M69/22 , F02M69/32 , F02M69/386
摘要： A fuel supplying device for use in fuel injection type internal combustion engine. The device has a fuel metering device operatively connected to an air valve device disposed in the air horn upstream of a throttle valve, fuel supplying means adapted to supply the fuel at a constant supplying pressure to the fuel metering device, a constant differential pressure valve arranged to maintain a predetermined differential pressure across the fuel metering device, and an injector for discharging the metered fuel into the air horn in the vicinity of the throttle valve. The constant differential pressure valve includes a diaphragm type valve arranged to sense and amplify differential pressure across the fuel metering device, and a variable orifice type flow control device arranged to charge flow resistance of the metered fuel. The diaphragm type valve has a function to detect and amplify the differential pressure across the fuel metering device, while the pressure of the metered fuel is controlled by the variable orifice type flow control device which is actuated in response to the differential pressure sensed and amplified by the diaphragm type valve.
摘要翻译：一种用于燃料喷射型内燃机的燃料供应装置。所述装置具有可操作地连接到设置在节气门上游的空气喇叭口中的空气阀装置的燃料计量装置，适于将燃料以恒定的供应压力供应给燃料计量装置的燃料供给装置，以保持燃料计量装置两端的预定压差，以及用于将计量燃料排放到节气门附近的空气喇叭中的喷射器。恒定差压阀包括隔离阀式阀，其布置成感测和放大燃料计量装置两端的压差，以及可变孔型流量控制装置，其布置成对计量燃料的流动阻力进行充气。隔膜式阀具有检测和放大燃料计量装置两端的压差的功能，而计量燃料的压力由可变孔型流量控制装置控制，可变孔型流量控制装置响应于通过隔膜式阀。

2. 发明授权

US4206599A Internal combustion engine 失效
标题翻译：内燃机
公开(公告)号：US4206599A
公开(公告)日：1980-06-10
申请号：US939984
申请日：1978-09-06
申请人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Junzo Uozumi , Tsuneo Ando , Yuzo Takeuchi , Mikio Minoura
发明人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Junzo Uozumi , Tsuneo Ando , Yuzo Takeuchi , Mikio Minoura
IPC分类号： F01N3/22 , F02B1/04 , F02M67/02 , F02M69/00 , F02M69/08 , F01N3/10
CPC分类号： F01N3/222 , F01N3/22 , F01N3/227 , F02M69/08 , F02B1/04
摘要： An internal combustion engine has a secondary air supply system and a fuel injection system including a two-fluid injection nozzle operative to inject air and fuel both under pressure into engine intake system. The secondary air supply system includes an air pump and a secondary air supply line extending between the pump and the engine exhaust system. The two-fluid injection nozzle is pneumatically connected to an air distributor provided on the secondary air supply line whereby pressurized air from the air pump is also supplied to the two-fluid injection nozzle and injected thereby together with the fuel to facilitate atomization of the injected fuel as well as to supercharge the engine.
摘要翻译：内燃机具有二次空气供应系统和燃料喷射系统，该系统包括双向喷射喷嘴，该二流体喷射喷嘴可操作以将空气和燃料在压力下喷射到发动机进气系统中。二次空气供应系统包括在泵和发动机排气系统之间延伸的气泵和二次空气供应管线。双流体注射喷嘴气动地连接到设置在二次空气供应管线上的空气分配器，由此来自空气泵的加压空气也被供应到双流体喷射喷嘴并且由此与燃料一起喷射，以便于喷射的雾化燃料以及对发动机进行增压。

3. 发明授权

US4253440A Fuel supply apparatus for internal combustion engines 失效
标题翻译：内燃机燃油供应装置
公开(公告)号：US4253440A
公开(公告)日：1981-03-03
申请号：US922852
申请日：1978-07-07
申请人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Junzo Uozumi , Tsuneo Ando , Yuzo Takeuchi , Mikio Minoura
发明人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Junzo Uozumi , Tsuneo Ando , Yuzo Takeuchi , Mikio Minoura
IPC分类号： F02D3/00 , F02M69/00 , F02M69/22 , F02M69/26 , F02M69/38 , F02M69/44 , F02M57/04 , F02M57/00
CPC分类号： F02M69/26 , F02M69/22 , F02M69/386 , F02M69/44
摘要： A fuel supply apparatus for internal combustion engines of a type including an air valve disposed in an intake conduit of the engine upstream of a throttle valve. A sensor is used for sensing the pressure in an air pressure chamber defined within the intake conduit between the air valve and the throttle valve and a feedback control unit is used for controlling the air valve in response to the pressure sensed by the sensor in order to maintain the pressure in the air pressure chamber at a preset value. A fuel flow metering valve is disposed in a fuel feed channel leading from a source of fuel under pressure to the intake conduit and the metering value is interlocked with the air valve in such a manner that the opening degree of the fuel metering valve is in proportion to that of the air valve. Also a pressure difference control unit is employed for maintaining the pressure difference of fuel across the fuel metering valve at a preset value, whereby the air-fuel ratio of an air-fuel mixture is maintained constant independently of the engine speed. The fuel supply apparatus of the above type further comprises a variable volume chamber defined by a cylinder and a piston slidably disposed within the cylinder and interlocked with the throttle valve. The pressure variation in the variable volume chamber according to operation of the throttle valve for acceleration or deceleration of the engine is transmitted to either the pressure difference control unit or the air valve control unit to correct the preset pressure difference across the fuel metering valve or the preset pressure in the air pressure chamber, whereby the air-fuel ratio is made richer or leaner during acceleration or deceleration of the engine.
摘要翻译：一种用于内燃机的燃料供应装置，其类型包括设置在发动机的进气管道中的空气阀在节气门上游。传感器用于感测在空气阀和节流阀之间限定在进气管道内的空气压力室中的压力，并且反馈控制单元用于响应于传感器感测到的压力来控制空气阀，以便将空气压力室中的压力保持在预设值。燃料流量计量阀设置在从压力下的燃料源引导到进气管道的燃料供给通道中，并且计量值与空气阀互锁，使得燃料计量阀的开度成比例到空气阀的那个。此外，采用压力差控制单元来将燃料在燃料计量阀上的压力差保持在预设值，由此空燃混合物的空燃比独立于发动机转速保持恒定。上述类型的燃料供给装置还包括由气缸限定的可变容积室和可滑动地设置在气缸内并与节流阀互锁的活塞。根据用于发动机加速或减速的节流阀的操作，可变容积室中的压力变化被传递到压力差控制单元或空气阀控制单元，以校正燃料计量阀或预定压力差在空气压力室中设定压力，由此在发动机的加速或减速期间使空燃比变得更加丰富或更稀。

4. 发明授权

US4211201A Fuel supply apparatus for internal combustion engines 失效
标题翻译：内燃机燃油供应装置
公开(公告)号：US4211201A
公开(公告)日：1980-07-08
申请号：US900506
申请日：1978-04-27
申请人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Junzo Uozumi , Tsuneo Ando , Yuzo Takeuchi , Mikio Minoura
发明人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Junzo Uozumi , Tsuneo Ando , Yuzo Takeuchi , Mikio Minoura
IPC分类号： F02D41/34 , F02D3/00 , F02D35/00 , F02D41/06 , F02D41/18 , F02M69/00 , F02M69/22 , F02M69/28 , F02M69/32 , F02M69/34 , F02M69/38 , F02M69/44
CPC分类号： F02D41/18 , F02D41/068 , F02M69/22 , F02M69/28 , F02M69/32 , F02M69/34 , F02M69/386 , F02M69/44
摘要： A fuel supply apparatus for an internal combustion engines comprises a throttle valve disposed in an intake conduit leading to the internal combustion engine, an air valve disposed in the intake conduit upstream of the throttle valve so as to define an air pressure chamber in the intake conduit in cooperation with the throttle valve, a device for controlling the air valve in response to the pressure prevailing in the air pressure chamber so that the pressure be maintained at a substantially constant level, and a fuel metering device including a variable throttle passage provided in a fuel feed conduit opening in the intake conduit through a fuel injection valve and interlocked with the air valve to be controlled so that the flow section area of the throttle passage may be proportional to the opening degree of the air valve, and a device for maintaining difference in pressure produced across the variable throttle passage at a predetermined value. The air valve controlling device includes a feedback control system which comprises a device for producing a signal of a level corresponding to the pressure prevailing in the air pressure chamber in the intake conduit, and a device responding to the signal for controlling the air valve so that the pressure within the air pressure chamber be maintained at a set valve, and further includes a device for automatically changing the level of the signal representative of the pressure level in the air pressure chamber in dependence on the environmental and operating conditions of the engine such as embient temperature, atmospheric pressure, engine temperature, deceleration and acceleration of the engine and the like, thereby to vary the intake air quantity to attain an optimum air-fuel ratio for the instantaneous operating condition of the engine.
摘要翻译：一种用于内燃机的燃料供应装置包括设置在通向内燃机的进气导管中的节流阀，设置在节流阀上游的进气导管中的空气阀，以便在进气管道中限定空气压力室与节流阀协作的装置，用于响应于空气压力室中的压力控制空气阀，使得压力保持在基本上恒定的水平;以及燃料计量装置，其包括可变节流通道，其设置在燃料供给管道通过燃料喷射阀在进气管道中打开，并与要控制的空气阀互锁，使得节流通道的流动区域面积可以与空气阀的开度成比例，以及用于保持差异的装置在可变节流通道上以预定值产生的压力。空气阀控制装置包括反馈控制系统，其包括用于产生与进气管道中的空气压力室中存在的压力相对应的水平的信号的装置，以及响应于用于控制空气阀的信号的装置，空气压力室内的压力保持在一个设定的阀门，并且还包括一个装置，用于根据发动机的环境和操作条件自动地改变代表空气压力室中的压力水平的信号的水平，例如发动机温度，发动机温度，减速度和加速度等，从而改变进气量，以获得用于发动机瞬时运转状态的最佳空燃比。

5. 发明授权

US4194478A Air-fuel ratio control system for an internal combustion engine 失效
标题翻译：用于内燃机的空燃比控制系统
公开(公告)号：US4194478A
公开(公告)日：1980-03-25
申请号：US900011
申请日：1978-04-25
申请人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Junzo Uozumi , Tsuneo Ando , Yuzo Takeuchi , Mikio Minoura
发明人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Junzo Uozumi , Tsuneo Ando , Yuzo Takeuchi , Mikio Minoura
IPC分类号： F02D3/00 , F02D41/06 , F02D41/18 , F02M69/00 , F02M69/22 , F02M69/26 , F02M69/28 , F02M69/34 , F02M69/38 , F02M69/44 , F02M39/00 , F02M7/00
CPC分类号： F02M69/26 , F02D41/064 , F02D41/18 , F02M69/22 , F02M69/28 , F02M69/34 , F02M69/386 , F02M69/44
摘要： A fuel supply apparatus for an internal combustion engine comprises an air valve disposed in an intake air conduit upstream of a throttle valve and caused to rotate in accordance with the quantity of intake air through the intake conduit, a fuel supply source for supplying fuel under a substantially constant pressure through a fuel feed conduit to a fuel discharge port opened to the intake conduit, and a fuel metering device including a variable slit provided in the fuel feed conduit and interlocked with the air valve to be controlled such that the flow area of the variable slit may be proportional to the quantity of intake air and a fuel differential device for maintaining pressure difference across the variable slit at a predetermined value. The fuel pressure differential device comprises a first pressure chamber applied with a fuel pressure prevailing at the downstream side of the variable slit, a second pressure chamber having a constant pressure difference relative to the first pressure chamber and a constant differential pressure valve disposed in the fuel feed conduit downstream of the variable slit for controlling the pressure at the downstream side of the variable throttle passage to have the aforementioned pressure difference relative to the second pressure chamber. Further the pressure of the second pressure chamber is arranged to be automatically varied dependent on environmental and operating conditions of the engine such as atmospheric pressure, ambient temperature, engine temperature, acceleration and deceleration of the engine, whereby the pressure difference across the variable slit is varied so as to correct the air-fuel ratio.
摘要翻译：一种用于内燃机的燃料供给装置，其特征在于，具备：空气阀，其配置于节流阀的上游侧的吸入空气管道内，并根据通过所述吸气管的吸入空气量而旋转;燃料供给源，基本恒定的压力通过燃料供给导管连接到通向进气管道的燃料排放口，以及燃料计量装置，其包括设置在燃料供给导管中并与要控制的空气阀互锁的可变狭缝，可变狭缝可以与进气量成比例，以及用于将可变狭缝两端的压差保持在预定值的燃料差速装置。燃料压差装置包括施加有在可变狭缝的下游侧的燃料压力的第一压力室，相对于第一压力室具有恒定压力差的第二压力室和设置在燃料中的恒定差压阀用于控制可变节流通道下游侧的压力的可变狭缝下游的进料导管相对于第二压力室具有上述压力差。此外，第二压力室的压力被设置为根据发动机的环境和操作条件（例如大气压力，环境温度，发动机温度，发动机的加速和减速）而自动变化，由此可变狭缝两端的压差为变化以校正空燃比。

6. 发明授权

US4235210A Fuel supply apparatus for internal combustion engines 失效
标题翻译：内燃机燃油供应装置
公开(公告)号：US4235210A
公开(公告)日：1980-11-25
申请号：US900507
申请日：1978-04-27
申请人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Junzo Uozumi , Tsuneo Ando , Yuzo Takeuchi , Mikio Minoura
发明人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Junzo Uozumi , Tsuneo Ando , Yuzo Takeuchi , Mikio Minoura
IPC分类号： F02M69/00 , F02B1/04 , F02M3/09 , F02M3/10 , F02M23/12 , F02M69/04 , F02M69/22 , F02M69/26 , F02B3/00
CPC分类号： F02M69/047 , F02M3/10 , F02M69/22 , F02M69/26 , F02B1/04
摘要： In a fuel supply apparatus for an internal combustion engine, a fuel discharging apparatus includes a fuel discharge port opened in an air intake conduit and a fuel valve for injecting a controlled quantity of fuel into the air intake passage through the discharge port. An annular fuel whirling chamber is formed around the fuel valve to receive fuel flow in a tangential direction to cause the fuel flow to whirl within the annular chamber. On the other hand, an annular recess is formed in a passage communicating the discharge port and the fuel valve with each other to forcively feed air to the fuel flowing through the passage. The fuel is thus intensively mixed with air and can be easily atomized upon being injected into the air intake passage through the discharge orifice.
摘要翻译：在用于内燃机的燃料供给装置中，燃料排出装置包括在进气管道中开口的燃料排出口和用于通过排出口将控制量的燃料喷射到进气通道中的燃料阀。环形燃料旋转室形成在燃料阀周围，以沿切线方向接收燃料流，使得燃料流在环形室内旋转。另一方面，在使排出口和燃料阀相互连通的通道中形成环状凹部，以将空气强制地送入流过通道的燃料。因此燃料与空气密集混合，并且在通过排放孔注入进气通道时可以容易地雾化。

7. 发明授权

US4207849A Air-fuel ratio control apparatus of a fuel supply system for an internal combustion engine 失效
标题翻译：用于内燃机的燃料供应系统的空燃比控制装置
公开(公告)号：US4207849A
公开(公告)日：1980-06-17
申请号：US932939
申请日：1978-08-11
申请人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Junzo Uozumi , Tsuneo Ando , Yuzo Takeuchi , Mikio Minoura
发明人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Junzo Uozumi , Tsuneo Ando , Yuzo Takeuchi , Mikio Minoura
IPC分类号： F02D41/34 , F02D3/02 , F02D35/00 , F02D41/38 , F02M69/22 , F02M69/38 , F02M39/00
CPC分类号： F02M69/386 , F02D35/0092 , F02M69/22
摘要： An air-fuel ratio control apparatus for an internal combustion engine has an air valve disposed in an intake passage downstream of a throttle valve to cooperate therewith to define an air pressure chamber and operative to maintain a substantially constant pressure therein. A fuel circuit includes a fuel discharge port open to the intake passage and a fuel-metering orifice operatively associated with the air valve such that the fuel-flowing section of the orifice is varied in proportion to the air-flowing section of the air valve. A constant differential fuel pressure valve is disposed in the fuel circuit to maintain a substantially constant fuel pressure difference across the fuel metering orifice during normal engine operation. The differential fuel pressure valve is mechanically operatively connected to a piston-cylinder assembly into which the fuel pressure upstream of the fuel-metering orifice is introduced. The position of the piston relative to the cylinder is varied when the engine operating condition is varied. The movement of the piston varies the fuel-flowing section of the differential fuel pressure valve thereby to vary the fuel pressure difference across the fuel-metering orifice whereby the air-fuel ratio is varied when the engine operating condition is varied.
摘要翻译：用于内燃机的空燃比控制装置具有设置在节气门下游的进气通道中的空气阀，以与其协调以限定空气压力室并且可操作以在其中保持基本恒定的压力。燃料回路包括通向进气通道的燃料排放口和与空气阀可操作地相关联的燃料计量孔，使得孔的燃料流动部分与空气阀的空气流动部分成比例地变化。恒定差压燃料压力阀设置在燃料回路中，以在正常的发动机运行期间在燃料计量孔口两端保持基本恒定的燃料压力差。差动燃料压力阀机械地操作地连接到活塞 - 气缸组件，燃料计量孔的上游的燃料压力被引入到该组件中。当发动机工作条件变化时，活塞相对于气缸的位置是变化的。活塞的运动改变了差动燃料压力阀的燃料流动部分，从而改变了燃料计量孔之间的燃料压力差，从而当发动机运行状态变化时空燃比变化。

8. 发明授权

US4187816A Air-fuel ratio controlling system for an internal combustion engine 失效
标题翻译：内燃机空燃比控制系统
公开(公告)号：US4187816A
公开(公告)日：1980-02-12
申请号：US923307
申请日：1978-07-10
申请人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Junzo Uozumi , Tsuneo Ando , Yuzo Takeuchi , Mikio Minoura
发明人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Junzo Uozumi , Tsuneo Ando , Yuzo Takeuchi , Mikio Minoura
IPC分类号： F02D41/14 , F02M69/00 , F02M69/22 , F02M69/26 , F02M39/00 , F02B33/00
CPC分类号： F02M69/26 , F02M69/007 , F02M69/22
摘要： An air-fuel ratio controlling system for a fuel-injection type internal combustion engine has an air valve disposed in an air intake duct upstream of a throttle valve and a fuel-metering variable orifice disposed in a fuel circuit. The air valve and the fuel-metering variable orifice are operatively associated with each other and controlled normally to maintain the air-fuel ratio at a substantially constant value. Pressurized fuel is used as a working fluid to operate the air valve. O.sub.2 sensor detects the oxygen content of exhaust gases to actuate a valve which varies the pressure of the working fluid to change the degree of opening of the air valve whereby the air-fuel ratio is adjusted in accordance with the output of the O.sub.2 sensor.
摘要翻译：用于燃料喷射型内燃机的空燃比控制系统具有设置在节气门上游的进气管道中的空气阀和设置在燃料回路中的燃料计量可变孔。空气阀和燃料计量可变孔口彼此可操作地相关联并且被正常控制，以将空燃比保持在基本恒定的值。加压燃料用作工作流体以操作空气阀。 O2传感器检测废气的氧含量以致动阀，其改变工作流体的压力以改变空气阀的开度，由此根据O2传感器的输出来调整空燃比。

9. 发明授权

US4254747A Intake system of a multi-cylinder internal combustion engine 失效
标题翻译：多缸内燃机进气系统
公开(公告)号：US4254747A
公开(公告)日：1981-03-10
申请号：US22478
申请日：1979-03-21
申请人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi
发明人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi
IPC分类号： F02B31/00 , F02B1/04 , F02B31/08 , F02D9/02 , F02D33/00 , F02M35/10 , F02M35/108 , F02B15/00
CPC分类号： F02M35/10183 , F02B31/08 , F02M35/10085 , F02M35/108 , F02B1/04 , F02B2031/003 , F02M35/112 , Y02T10/146
摘要： A multi-cylinder internal combustion engine having an intake manifold equipped with a variable venturi type carburetor. A secondary throttle valve is provided for each cylinder. Each of the secondary throttle valves is arranged in the respective manifold branch. An auxiliary intake passage is branched off from the collecting portion of the intake manifold and connected to a distribution channel formed in the cylinder head. Each of the intake ports is connected to the distribution channel via a corresponding channel branch which opens into the intake port at a position near the intake valve. A primary throttle valve is arranged in the auxiliary intake passage and opened in accordance with an increase in level of the load of an engine. The secondary throttle valves are opened after the opening degree of the primary throttle valve is increased beyond a predetermined opening degree.
摘要翻译：具有装有可变文丘里型化油器的进气歧管的多气缸内燃机。为每个气缸设置二次节流阀。每个二次节流阀布置在相应的歧管分支中。辅助进气通道从进气歧管的收集部分分出并连接到形成在气缸盖中的分配通道。每个进气口通过相应的通道分支连接到分配通道，通道分支在靠近进气门的位置处进入进气口。主节流阀配置在辅助进气通道中，并根据发动机负载水平的增加而打开。在主节流阀的开度增加超过预定开度之后，二次节气门打开。

10. 发明授权

US4336776A Swirl-inducing apparatus for internal combustion engines 失效
标题翻译：用于内燃机的涡流诱导装置
公开(公告)号：US4336776A
公开(公告)日：1982-06-29
申请号：US44254
申请日：1979-05-31
申请人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Hiroshi Takahashi , Shuhei Toyoda
发明人： Masaharu Sumiyoshi , Setsuro Sekiya , Katsuhiko Motosugi , Hiroshi Takahashi , Shuhei Toyoda
IPC分类号： F02B31/00 , F02B1/04 , F02B31/06 , F02D9/02
CPC分类号： F02B31/06 , F02B1/04 , F02B2275/20 , Y02T10/146
摘要： A throttle valve is positioned at the entrance to a swirl type of suction passage near to the corresponding intake valve of a cylinder in an internal combustion engine. The valve is designed so that when it is opened only slightly (e.g. 30.degree.-40.degree.), the flow of intake gas passing therethrough converges to flow eccentrically along one side of the suction passage. This arrangement provides full control of the intake gas in the suction passage before it reaches the combustion chamber, even when the volume of flow is small, thereby producing an effective swirl within the combustion chamber for all operating conditions of the engine.
摘要翻译：节气门位于靠近内燃机的气缸的相应进气门的涡旋式抽吸通道的入口处。阀被设计成当仅仅稍微打开（例如30°-40°）时，通过的进气的流动收敛成沿着吸入通道的一侧偏心地流动。这种布置在吸入通道到达燃烧室之前提供对吸入气体的完全控制，即使当流量小时，也可以在发动机的所有操作条件下在燃烧室内产生有效的涡流。

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