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    • 1. 发明授权
    • Electronic controlled carburetor
    • 电子控制化油器
    • US4380984A
    • 1983-04-26
    • US278396
    • 1981-06-29
    • Tadashi NagaiKen NakamuraYasuo Nakajima
    • Tadashi NagaiKen NakamuraYasuo Nakajima
    • F02D41/14F02D35/00F02M7/24F02B33/00F02B3/00F02M7/14F02M23/04
    • F02M7/24F02D35/0061
    • An electronic controlled carburetor has an induction passage into which fuel is fed by a fuel metering system communicated with the atmosphere through main and auxiliary air bleed passages. The main and auxiliary air bleed passages have therein main and auxiliary solenoid valves, respectively, for altering the rate of air flow therethrough. A control circuit determines the duty ratio of a first pulse signal applied to the main solenoid valve in response to an air/fuel ratio indicative signal from an oxygen sensor. The control circuit determines the duty ratio of a second pulse signal applied to the auxiliary solenoid valve from the duty ratio of the first pulse signal so as to permit the main solenoid valve to operate around 50% duty ratio over all engine operating modes.
    • 电子控制化油器具有通过主和辅助排气通道与大气连通的燃料计量系统供给燃料的进气通道。 主要和辅助排气通道分别具有主和辅助电磁阀,用于改变通过其中的空气流速。 控制电路响应于来自氧传感器的空/燃比指示信号来确定施加到主电磁阀的第一脉冲信号的占空比。 控制电路根据第一脉冲信号的占空比确定施加到辅助电磁阀的第二脉冲信号的占空比,从而允许主电磁阀在所有发动机工作模式下操作大约50%的占空比。
    • 4. 发明授权
    • Engine system for motor vehicle
    • 汽车发动机系统
    • US4240253A
    • 1980-12-23
    • US861663
    • 1977-12-19
    • Ken NakamuraYasuo NakajimaKunihiko SugiharaMasanori Takami
    • Ken NakamuraYasuo NakajimaKunihiko SugiharaMasanori Takami
    • F01N3/22F02M23/04F02M25/07F02M23/08F01N3/10
    • F02M23/04F01N3/22F01N3/222F01N3/227F02M26/36F02M26/55Y02T10/146
    • An engine system of the invention comprises an internal combustion engine; a carburetor; an exhaust gas recirculation system; an exhaust gas treatment device; and a source of secondary air, in which there is provided a fluid network which interconnects the source of secondary air, the engine exhaust system at a position upstream of the exhaust gas treatment device and the exhaust gas recirculation system at a position upstream of an exhaust gas recirculation valve and there is also provided an air injection control valve fluidly disposed in the fluid network intermediate the source of secondary air and the exhaust gas recirculation system. The air injection control valve is adapted to selectively permit and prevent the admission of air to the exhaust gas recirculation system. A controller for the air injection control valve is also disclosed which comprises a detector that generates as an output signal a first signal responsive to urban driving conditions which are empirically determined to occur when the motor vehicle is driven in urban areas and a second signal responsive to rural driving conditions which are empirically determined to occur when the motor vehicle is driven in rural areas. The controller causes the air injection valve to permit the admission of air to the EGR system when the detector detects the rural driving conditions.
    • 本发明的发动机系统包括内燃机; 化油器 排气再循环系统; 废气处理装置; 和二次空气源,其中提供了一个流体网络,其将二次空气源互相连接,发动机排气系统在废气处理装置的上游位置和废气再循环系统之间的排气上游 气体再循环阀,并且还提供了流体地设置在二次空气源和废气再循环系统中的流体网络中的空气喷射控制阀。 空气喷射控制阀适于选择性地允许和防止空气进入废气再循环系统。 还公开了一种用于空气喷射控制阀的控制器,其包括一个检测器,该检测器产生响应城市驾驶条件的第一信号,所述城市驾驶条件是经验确定的,当汽车在城市区域被驱动时发生,第二信号响应于 在农村地区驾驶汽车的经验确定的农村驾驶条件。 当检测器检测到农村驾驶条件时,控制器使得空气喷射阀允许空气进入EGR系统。