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    • 1. 发明授权
    • Air-fuel ratio feedback control system including at least
downstream-side air-fuel ratio sensor
    • 至少包括下游侧空燃比传感器的空燃比反馈控制系统
    • US4964271A
    • 1990-10-23
    • US163871
    • 1988-03-03
    • Hiroshi SawadaTatehito UedaKiyoshi NakanishiTakayuki Demura
    • Hiroshi SawadaTatehito UedaKiyoshi NakanishiTakayuki Demura
    • F02D41/14
    • F02D41/1441F02D41/123F02D41/1481F02D41/1488F02D2041/1418F02D2200/021F02D41/08F02D41/1454
    • In an air-fuel ratio feedback control system including at least one air-fuel ratio sensor downstream of a catalyst converter provided in an exhaust gas passage, an actual air-fuel ratio is controlled in accordance with the output of the downstream-side air-fuel ratio sensor. When at least one of the air-fuel ratio feedback control conditions for the downstream-side air-fuel ratio sensor is not satisfied the controlled air-fuel ratio is made an air-fuel ratio by an open loop control, while all the air-fuel ratio feedback control conditions for the downstream-side air-fuel ration sensor are satisfied the controlled air-fuel ratio is made the stoichiometric ratio (.lambda.=1) in accordance with the output of the downstream-side air-fuel ratio sensor. For a period after all the air-fuel ratio feedback control conditions for the downstream-side air-fuel ratio sensor are satisfied, the control by the output of the downstream-side air-fuel ratio sensor is prohibited, but, the controlled air-fuel ratio is made the stoichiometric ratio (.lambda.=1) by an open loop control or by the output of an upstream-side air-fuel ratio sensor.
    • 在设置在废气通道中的催化剂转化器的下游的至少一个空燃比传感器的空燃比反馈控制系统中,根据下游侧空气燃料比的输出控制实际的空燃比, 燃油比传感器 当下游侧空燃比传感器的空燃比反馈控制条件中的至少一个不满足时,通过开环控制使受控空燃比成为空燃比, 满足下游侧空燃比传感器的燃料比反馈控制条件,根据下游侧空燃比传感器的输出,使受控空燃比成为化学计量比(λ= 1)。 在满足下游侧空燃比传感器的空燃比反馈控制条件的期间之后,禁止下游侧空燃比传感器的输出进行的控制, 通过开环控制或上游侧空燃比传感器的输出,使燃料比成为化学计量比(λ= 1)。
    • 7. 发明授权
    • Exhaust gas recirculation for a diesel engine
    • 柴油发动机废气再循环
    • US4237837A
    • 1980-12-09
    • US898
    • 1979-01-04
    • Tadahide TodaTatehito Ueda
    • Tadahide TodaTatehito Ueda
    • F02B3/06F02M25/07F02M25/06
    • F02M26/55F02M26/21F02M26/70F02M26/71F02B3/06
    • An exhaust gas recirculation control valve for a diesel engine. The valve comprises a valve casing of a rectangular cross-sectional shape disposed in the intake line of the engine. A valve seat connected to an exhaust line of the engine via an EGR passageway is formed in a side wall of the rectangular-shaped valve casing. A valve member is arranged in the casing and then rotated about an axis located upstream of the valve seat in such a manner that the valve member is moved between a position wherein valve member closes the valve seat and another position wherein the plate closes the intake passageway. The valve member comprises a base portion of a flat shape and a guide portion which is inserted into the valve seat when the degree of opening of the valve member is small.
    • 一种用于柴油发动机的废气再循环控制阀。 阀包括设置在发动机的进气管线中的矩形横截面形状的阀壳体。 在矩形阀壳体的侧壁上形成有通过EGR通路连接到发动机的排气管路的阀座。 阀构件布置在壳体中,然后围绕位于阀座上游的轴线旋转,使得阀构件在阀构件关闭阀座的位置和其中板关闭进气通道的位置之间移动 。 阀构件包括平坦形状的基部和当阀构件的打开程度小时插入到阀座中的引导部。
    • 9. 发明授权
    • Fuel injection amount - fluid pressure conversion system
    • 燃油喷射量 - 流体压力转换系统
    • US4327684A
    • 1982-05-04
    • US61425
    • 1979-07-27
    • Hiroshi SamiTatehito Ueda
    • Hiroshi SamiTatehito Ueda
    • F02M41/12F02B1/04F02D1/04F02D11/06F02D21/08F02D33/00F02M55/00F02D1/12
    • F02M41/124F02B1/04
    • In an internal combustion engine equipped with a fuel injection pump which has a movable fuel amount determining element, the position of which determines the amount of fuel provided for injection by the fuel injection pump, a pressure regulating valve is disclosed which is coupled to the movement of the movable fuel amount determining element and which provides an output fluid pressure which represents the position of this element, and therefore represents the load on the engine. The valve comprises a fixed orifice supplied with a constant fluid pressure, a fluid passage downstream of the fixed orifice, a pressure takeoff passage branching from the fluid passage, and a variable orifice downstream of the fluid passage whose effective opening area is varied according to the movement of the fuel amount determining element. Fluid flows from the upstream side of the fixed orifice through it, through the fluid passage, and through the variable orifice, in that order, the pressure of fluid at the point where the pressure takeoff passage branches from the fluid passage varying according to the position of the fuel amount determining element.
    • 在配备有具有可动燃料量确定元件的燃料喷射泵的内燃机中,所述燃料喷射泵的位置决定了由燃料喷射泵提供的用于喷射的燃料量,公开了一种压力调节阀, 并且提供表示该元件的位置的输出流体压力,因此表示发动机上的负载。 该阀包括供给恒定流体压力的固定孔,固定孔下游的流体通道,从流体通道分支的压力输出通道,以及流体通道下游的可变孔,其有效开口面积根据 燃料量确定元件的移动。 流体从固定孔的上游侧通过流体通道流动,并且通过可变孔口依次顺序流过压力通道从流体通道分支的点根据位置而变化的压力 的燃料量确定元件。
    • 10. 发明授权
    • Three-step exhaust gas recirculation control system
    • 三步排气再循环控制系统
    • US4280470A
    • 1981-07-28
    • US102450
    • 1979-12-11
    • Tatehito Ueda
    • Tatehito Ueda
    • F02M25/07F02B1/04F02B3/06F02D21/08F02M25/06
    • F02D21/08F02M26/57F02B1/04F02B3/06
    • An exhaust gas recirculation control system for particular application to a diesel engine, which has an exhaust gas recirculation control valve, and a means for actuating the exhaust gas recirculation control valve, which positions the exhaust gas recirculation control valve selectively and steppedly at one of three states, that are: a first state in which it provides substantially zero exhaust gas recirculation ratio, a second state in which it provides a medium exhaust gas recirculation ratio, and a third state in which it provides a maximum exhaust gas recirculation ratio, according to the load on the engine, so that the valve is steppedly shifted from the third state toward the first state via the second state as engine load increases.
    • 一种用于特别应用于具有排气再循环控制阀的柴油发动机的排气再循环控制系统,以及用于致动排气再循环控制阀的装置,其将排气再循环控制阀选择性地和步进地定位在三个之一 状态,即:其提供基本上为零的废气再循环比率的第一状态,其提供中等废气再循环比率的第二状态,以及其提供最大废气再循环比率的第三状态,根据 发动机上的负载,使得当发动机负载增加时,阀经由第二状态从第三状态向第一状态逐步移位。