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    • 3. 发明授权
    • Air-fuel ratio controlling apparatus for an internal combustion engine
    • 用于内燃机的空燃比控制装置
    • US4164914A
    • 1979-08-21
    • US783429
    • 1977-03-31
    • Tadashi HattoriAkira TakataTamotsu FukudaTakamichi Nakase
    • Tadashi HattoriAkira TakataTamotsu FukudaTakamichi Nakase
    • F02D35/00F02M23/04F02M7/00
    • F02M23/04F02D35/003Y02T10/146
    • An apparatus for controlling the air-fuel ratio of an air-fuel mixture to be supplied into a combustion chamber of an internal combustion engine comprises a passage bypassing a carburetor and a throttle valve of the engine for supplying an additional air into the engine intake duct downstream of the throttle valve to dilute the air-fuel mixture to an air-fuel ratio most suited for the engine operation. An air valve is provided in the bypass passage to vary the air-flow cross-sectional area of the passage. The opening of the air valve is controlled mainly in accordance with the air-fuel ratio of the mixture as detected by an air-fuel ratio detector in the path of flow of engine exhaust gases. A variable orifice is provided in the bypass passage downstream of the air valve and defined by a valve seat and a needle valve operatively associated therewith to vary the opening area of the orifice. The needle valve is actuated by a pneumatic valve actuator which is responsive to variations in the engine manifold vacuum. The arrangement is such that the pressure difference across the air valve is kept substantially constant whereby the supply of the additional air is substantially in proportion to the engine intake air and free from influence by the engine manifold vacuum.
    • 用于控制供给到内燃机的燃烧室中的空气燃料混合物的空燃比的装置包括绕过化油器的通道和用于向发动机进气管道中供应附加空气的发动机的节气门 在节流阀的下游,将空气 - 燃料混合物稀释到最适合发动机运转的空燃比。 在旁通通道中设置有空气阀,以改变通道的气流横截面积。 主要由发动机废气流动路径中的空燃比检测器检测出的混合气的空燃比主要控制空气阀的开度。 在空气阀下游的旁通通道中设置可变孔口,并由阀座和与其可操作地相关联的针阀限定,以改变孔口的开口面积。 针阀由气动阀致动器致动,该致动器响应发动机歧管真空度的变化。 这种布置使得跨越空气阀的压力差保持基本恒定,由此附加空气的供应基本上与发动机进气成正比并且不受发动机歧管真空的影响。
    • 5. 发明授权
    • Air flow amount adjusting system for an internal combustion engine
    • 用于内燃机的空气流量调节系统
    • US4192268A
    • 1980-03-11
    • US30953
    • 1979-04-17
    • Tadashi HattoriAkira TakataTamotsu FukudaTakamichi Nakase
    • Tadashi HattoriAkira TakataTamotsu FukudaTakamichi Nakase
    • F02B1/04F02D41/14F02M23/04F02D1/04
    • F02D41/1481F02M23/04F02B1/04Y02T10/146
    • An air flow amount adjusting system produces an air-fuel mixture of a desirable air-fuel ratio by controlling the direction of movement of a bypass valve mounted in an additional air supply pipe adapted to supply additional air into either the intake system or exhaust system of an internal combustion engine in accordance with an output signal produced from a gas sensor mounted in the exhaust system of the engine and indicative of the air-fuel ratio of the mixture supplied to the engine. A two-level mode signal whose threshold corresponds to the desired air-fuel ratio is produced in accordance with the output signal of the gas detector. After the two-level mode signal has changed from one level to the other level, the movement of the bypass valve is stopped for a certain period of time. If desired, the stopping period of the bypass valve may be changed in accordance with the temperature of the engine.
    • 空气流量调节系统通过控制安装在附加空气供应管中的旁通阀的运动方向来产生期望空燃比的空气 - 燃料混合物,该附加空气供应管适于将额外空气供应到进气系统或排气系统 根据从安装在发动机的排气系统中的气体传感器产生的输出信号的内燃机,其指示供应给发动机的混合物的空燃比。 根据气体检测器的输出信号产生阈值对应于所需空燃比的两电平模式信号。 在双电平模式信号从一个电平变化到另一个电平之后,旁路阀的运动停止一段时间。 如果需要,可以根据发动机的温度来改变旁通阀的停止时段。