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1. 发明授权

US11236704B2 Primary pump and carburetor using the same 有权
公开(公告)号：US11236704B2
公开(公告)日：2022-02-01
申请号：US16943038
申请日：2020-07-30
申请人： ZAMA JAPAN CO. LTD.
发明人： Hiroyuki Oka , Kazunori Tabata , Toshiyuki Kuyo
IPC分类号： F02M17/04 , F02M7/08
摘要： An improved primary pump for a carburetor is provided. The primary pump has a reduced cost and reduced space construction. The primary pump includes: a flexible cap having a cavity; an inlet open to the cavity of the flexible cap; an inlet side path fluidly coupled to the inlet; an inlet side check valve disposed in the inlet side path; an outlet open to the cavity of the flexible cap; an outlet side path fluidly coupled to the outlet; and an outlet side check valve disposed on the outlet side path, wherein at least one among the inlet side check valve and the outlet side check valve comprises a flap formed in a pump diaphragm of a fuel pump of the carburetor.

2. 发明申请

US20220018315A1 ROTARY CARBURETOR 有权
公开(公告)号：US20220018315A1
公开(公告)日：2022-01-20
申请号：US17377291
申请日：2021-07-15
申请人： ZAMA JAPAN CO. LTD.
发明人： Daisuke Suzuki , Naoya Wada
IPC分类号： F02M9/08
摘要： Disclosed is an improved rotary throttle valve carburetor with a simple structure and that can be adjusted easily, without replacing parts. The improved rotary throttle valve carburetor includes: a throttle valve having a throttle hole; a metering needle disposed perpendicularly to an air intake passage; a fuel nozzle; and a starting mechanism comprising a throttle valve lever, an operating cam, and an adjusting screw. The throttle valve lever is coupled to the rotary throttle valve and is configured to rotate the throttle valve into a first state with increased airflow for cold starting. The operating cam is configured to push the throttle valve lever upward and hold the throttle valve lever in the first state using an engaging protrusion. The adjusting screw is configured to adjust a depth of the metering needle being inserted into the throttle hole by adjusting a position of the throttle valve lever.

3. 发明申请

US20210180551A1 FUEL INJECTION DEVICE 有权
公开(公告)号：US20210180551A1
公开(公告)日：2021-06-17
申请号：US17120125
申请日：2020-12-12
申请人： ZAMA JAPAN CO. LTD.
发明人： Toshinobu Shimoyama , Takashi Kawashima , Hiroo Ubukata , Yuri Sato , Hideki Watanabe
IPC分类号： F02M53/04 , F02M51/06 , F02M37/00
摘要： Disclosed are example embodiments of an electronic fuel injection device. In one example embodiment, the electronic fuel injection device includes: a yoke having an inner chamber; an armature and a plunger slidably disposed inside the inner chamber of the yoke; a cylindrical bobbin configured to receive the yoke; an electromagnetic coil disposed around an outside surface of the cylindrical bobbin; and a fuel return path formed between an outer surface of the yoke and an inner surface of the cylindrical bobbin. The inner surface of the cylindrical bobbin comprises surface cooling features, including channels or protrusions, configured to remove heat from the cylindrical bobbin.

4. 发明授权

US09188066B2 Speed reduction method for hand-carried engine-driven working machine 有权
标题翻译：手动发动机驱动作业机减速方法
公开(公告)号：US09188066B2
公开(公告)日：2015-11-17
申请号：US13745310
申请日：2013-01-18
申请人： IIDA DENKI KOGYO CO., LTD. , ZAMA JAPAN CO., LTD.
发明人： Ryouhei Yamashita , Akira Yamazaki , Tamotsu Saitou , Hideki Watanabe , Takumi Nonaka
IPC分类号： F02D3/04 , F02D41/12 , F02P5/15 , F02D31/00
CPC分类号： F02D3/04 , F02D31/003 , F02D41/12 , F02D2400/06 , F02P5/1504 , Y02T10/46
摘要： A speed reduction method for a hand-carried engine-driven working machine is provided in which a speed reduction of an engine can be attained reliably and safely by preventing the occurrence of lean come-down phenomenon in such a state that the engine is operating in a practical revolution speed range. An acceleration is calculated based on a change in revolution speed, and when the acceleration becomes smaller than a predetermined threshold, an ignition timing is retarded by a desired amount based on a determination that the engine is being decelerated, and further, a fuel flow rate is also increased, whereby the decelerated state of the engine is maintained without fail, so that the occurrence of lean come-down phenomenon is prevented in the process of reducing the revolution speed of the engine.
摘要翻译：提供了一种用于手持式发动机驱动作业机的减速方法，其中通过在发动机运转的状态下防止发生减速现象，可靠可靠地实现发动机的减速一个实际的革命速度范围。基于转速的变化来计算加速度，并且当加速度小于预定阈值时，基于发动机正在减速的判定，点火正时被延迟期望量，此外，燃料流量也增加了发动机的减速状态，从而在降低发动机的转速的过程中防止发生倾倒现象。

5. 发明授权

US07500657B2 Carburetor for stratified scavenging two-cycle engine 有权
标题翻译：用于分层清扫双循环发动机的化油器
公开(公告)号：US07500657B2
公开(公告)日：2009-03-10
申请号：US11953596
申请日：2007-12-10
申请人： Kimio Koizumi
发明人： Kimio Koizumi
IPC分类号： F02M9/08
CPC分类号： F02B25/22 , F02B25/14 , F02B2075/025 , Y10S261/01
摘要： A carburetor for a stratified scavenging two-cycle engine, in which a throttle valve and a air valve are formed in a valve element that is a single cylindrical member in which a throttle through-hole and an air through-hole are diametrically formed and which is rotatably fitted in a body, the mixture passage and the air passage being formed piercing through a body, wherein the height of the body is decreased so as to miniaturize the carburetor as a whole, and the mixture passage (6) and the air passage (9) are formed in a single cylindrical common hole (69) in which the mixture passage (6) and the air passage (9) are partitioned by a partition wall (68).
摘要翻译：一种用于分层清扫双循环发动机的化油器，其中节流阀和空气阀形成在其中节流通孔和空气通孔直径形成的单个圆柱形构件的阀元件中，可旋转地装配在主体中，混合物通道和空气通道穿过主体，其中主体的高度减小，从而整体化化油器的小型化，并且混合通道（6）和空气通道（9）形成在其中混合通道（6）和空气通道（9）被分隔壁（68）分隔开的单个圆柱形公共孔（69）中。

6. 发明申请

US20220065198A1 FUEL INJECTING NOZZLE 有权
公开(公告)号：US20220065198A1
公开(公告)日：2022-03-03
申请号：US17464884
申请日：2021-09-02
申请人： ZAMA JAPAN CO. LTD.
发明人： Daisuke Suzuki , Takumi Takahashi , Naoya Wada , Giovanni Leccese , Satomi Ochiyasu , Haruki Kudo , Toshiyuki Kuyo
IPC分类号： F02M19/04
摘要： To provide a fuel injection nozzle that not only enables adjustment of a flow rate, but also causes contaminants and gum to pass through to reduce an effect on the flow rate. A fuel injection nozzle having a flat portion on an outer peripheral face of a needle is disclosed. The fuel injection nozzle opens at a predetermined angle, and, by the needle moving in an axial direction in an inner periphery of an injection hole, gaps are formed between the outer peripheral face of the needle and an inner peripheral face of the injection hole of a nozzle body. Adjustment to a desired fuel injection flow rate is possible by setting an outer diameter of the needle, a distance from the seat portion to a starting position of the flat portion on the outer peripheral face of the needle, and an incline angle of the flat portion.

7. 发明申请

US20210207559A1 ROTARY TYPE CARBURETOR FOR STRATEFIED SCAVENGING ENGINE 有权
公开(公告)号：US20210207559A1
公开(公告)日：2021-07-08
申请号：US17134910
申请日：2020-12-28
申请人： ZAMA JAPAN CO. LTD.
发明人： Takumi Takahashi , Mineyuki Tamura , Hideki Sasaki , Hiroki Sato
IPC分类号： F02M9/08
摘要： An improved rotary type carburetor for a stratified scavenging engine designed to enable the easy adjustment of air and fuel flow at the time of initial configuration is disclosed. The improved rotary carburetor includes an air intake passage and an air-fuel mixture passage formed in a horizontal direction on a carburetor main body. The throttle valve of the improved rotary carburetor can be fitted into a cylindrical-throttle-valve hole formed orthogonal to a fuel and an air passage of the carburetor main body. The throttle valve has the air supply side valve hole formed on the air intake passage side and a fuel supply side valve hole formed on the air-fuel mixture passage side.

8. 发明授权

US09115670B2 Fuel control method for hand-carried engine-driven working machine 有权
标题翻译：手持发动机驱动作业机的燃油控制方法
公开(公告)号：US09115670B2
公开(公告)日：2015-08-25
申请号：US13852413
申请日：2013-03-28
申请人： IIDA DENKI KOGYO CO., LTD. , ZAMA JAPAN CO., LTD
发明人： Ryouhei Yamashita , Akira Yamazaki , Tamotsu Saitou , Hideki Watanabe , Takumi Nonaka
IPC分类号： F02P5/00 , F02M3/00 , B60T7/12 , F02M17/00 , F02M71/00 , F02P5/145 , F02D41/00 , F02M3/06 , F02D41/08
CPC分类号： F02M17/00 , F02D41/0002 , F02D41/08 , F02D2041/001 , F02D2200/0406 , F02M3/062 , F02M71/00 , F02P5/1455
摘要： The opening of a solenoid valve is automatically adjusted after an engine is started and before actual work is performed for an appropriate air-fuel ratio, whereby it is possible to attain a good and stable driving of the engine without any delay even for an abrupt change in load. After the engine is started, when a rotation speed enters a “fuel flow rate adjusting rotation speed range” in which a definite load is applied to the engine in a working rotation speed range of the engine in which a throttle valve is opened to a definite opening, a detected rotation speed is fed back to a target rotation speed, and the opening of the solenoid valve is controlled to adjust a fuel flow rate, so that the combustion state in the engine is optimized at the valve opening so determined.
摘要翻译：在发动机启动后，在实际工作之前，为适当的空燃比自动调节电磁阀的开度，从而即使发生突然变化，也可以无延迟地实现发动机的良好稳定的驱动在加载。在发动机启动后，当转速进入发动机在其中打开节气门的发动机的工作转速范围内对发动机施加明确负荷的“燃料流量调节转速范围” 将检测出的转速反馈到目标转速，控制电磁阀的开度来调节燃料流量，从而在如此确定的阀开度时优化发动机的燃烧状态。

9. 发明授权

US07210672B2 Accelerator apparatus for diaphragm carburetors 有权
标题翻译：隔膜式化油器加速装置
公开(公告)号：US07210672B2
公开(公告)日：2007-05-01
申请号：US11218429
申请日：2005-09-06
申请人： Takashi Ishii
发明人： Takashi Ishii
IPC分类号： F02M7/08
CPC分类号： F02M7/08
摘要： An accelerated fuel passage of an accelerator pump operatively connected with a throttle shaft having a throttle valve. The accelerated fuel passage is connected to an upstream side of a needle orifice, which orifice is coupled to a main nozzle. Consequently, the fuel is discharged by the accelerator pump into an area before the needle orifice. By the addition of a one-way check valve system in a fuel pick up at a metering chamber for a fuel circuit, the fuel driven by the accelerator pump piston is discharged to a venturi tube of an intake passage through the main nozzle. A self pumping effect caused by an engine pulsation is dampened or eliminated by the needle orifice. Further, a check valve is provided within a fuel pick up at a metering chamber for a fuel circuit, whereby the fuel driven by the accelerator pump piston is discharged to a venturi tube through a main nozzle without returning to the fixed fuel chamber.
摘要翻译：与具有节流阀的节流轴可操作地连接的加速器泵的加速燃料通道。加速燃料通道连接到针孔的上游侧，该孔连接到主喷嘴。因此，燃料由加速泵排出到针孔前的区域。通过在用于燃料回路的计量室处的燃料拾取器中添加单向止回阀系统，由加速器泵活塞驱动的燃料被排出到通过主喷嘴的进气通道的文丘里管。由发动机脉动引起的自泵送效应被针孔抑制或消除。此外，在用于燃料回路的计量室内的燃料拾取器内设置止回阀，由此由加速器泵活塞驱动的燃料通过主喷嘴排出到文丘里管而不返回到固定燃料室。

10. 发明授权

US07168423B2 Gas sensor units for engines 有权
标题翻译：用于发动机的气体传感器单元
公开(公告)号：US07168423B2
公开(公告)日：2007-01-30
申请号：US11191085
申请日：2005-07-28
申请人： Takumi Nonaka
发明人： Takumi Nonaka
IPC分类号： F02D41/14
CPC分类号： F01N13/008 , F01N13/1822 , G01N27/16 , G01N33/0009
摘要： In a multipurpose engine with a reduced or limited displacement adapted for use in a portable work machine or the like, the engine includes a detecting element of a gas sensor for controlling an air-fuel ratio. Damage or degradation of the detecting element due to vibration from the engine is reduced or eliminated. To achieve this, a supporting device having a vibration-damping-function is provided for supporting the gas sensor or the gas sensor unit containing the gas sensor. The supporting device permits the gas sensor or the gas sensor unit to move by an amount equal to or less than a predetermined extent of movement of the engine, so that the transmission of vibration from the engine directly to the gas sensor is reduced or eliminated.
摘要翻译：在适用于便携式作业机械等的具有减小或有限位移的多功能发动机中，发动机包括用于控制空燃比的气体传感器的检测元件。减少或消除由于来自发动机的振动导致的检测元件的损坏或劣化。为了实现这一点，提供了具有减振功能的支撑装置，用于支撑包含气体传感器的气体传感器或气体传感器单元。支撑装置允许气体传感器或气体传感器单元移动等于或小于发动机的预定运动程度的量，从而减少或消除从发动机直接传递到气体传感器的振动。

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