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    • 4. 发明授权
    • Apparatus for controlling air-fuel ratio for engine
    • 用于控制发动机的空气燃料比的装置
    • US5090199A
    • 1992-02-25
    • US626829
    • 1990-12-13
    • Kenji IkutaToshio KondoHiroshi Haraguchi
    • Kenji IkutaToshio KondoHiroshi Haraguchi
    • F02D41/04F02D41/14
    • F02D41/1401F02D41/1441F02D41/1479F02D2041/1409F02D2041/1415F02D2041/1418F02D2041/1433F02D41/1456
    • An air-fuel ratio control apparatus for an engine for controlling a fuel injection amount so that an air-fuel ratio of a mixture gas which is supplied to the engine is set to a stoichiometric air-fuel ratio is disclosed. The apparatus has a first oxygen concentration sensor on the upstream side of a catalyst arranged in an exhaust pipe of the engine and a second oxygen concentration sensor on the downstream side, respectively. The first sensor gives to the apparatus a first linear detection signal for the air-fuel ratio of the mixture gas. The second sensor gives to the apparatus a second detection signal indicating whether the air-fuel ratio of the mixture gas is rich or lean for the stoichiometric air-fuel ratio. A target air-fuel ratio is set in accordance with the second detection signal and the first detection signal and the target air-fuel ratio are compared, thereby controlling a fuel injection amount. Thus, a deviation between the actual air-fuel ratio and the first detection signal can be accurately corrected and the air-fuel ratio can be accurately controlled to a value in a region where a high purification factor of the catalyst is derived.
    • 公开了一种用于控制燃料喷射量的发动机的空燃比控制装置,使得供给发动机的混合气体的空燃比被设定为理论空燃比。 该装置在布置在发动机的排气管中的催化剂的上游侧具有第一氧浓度传感器,在下游侧具有第二氧浓度传感器。 第一传感器向装置提供混合气体的空燃比的第一线性检测信号。 第二传感器给予装置第二检测信号,其指示混合气体的空燃比对于化学计量空燃比是富还是贫。 根据第二检测信号设定目标空燃比,并比较第一检测信号和目标空燃比,由此控制燃料喷射量。 因此,可以精确地校正实际空燃比与第一检测信号之间的偏差,并且可以将空燃比精确地控制为导致催化剂的净化系数高的区域的值。
    • 5. 发明授权
    • Air-fuel ratio control apparatus for engine
    • 发动机空燃比控制装置
    • US5154053A
    • 1992-10-13
    • US690825
    • 1991-04-26
    • Kazumi IshidaHiroshi HaraguchiToshio Kondo
    • Kazumi IshidaHiroshi HaraguchiToshio Kondo
    • F02B1/04F02D19/02F02D41/14F02M21/02
    • F02D41/1441F01N2240/20F02B1/04
    • An air-fuel ratio control apparatus in which an air-fuel ratio of a mixture gas supplied to an engine, especially, a gas engine, is controlled in accordance with an output signal of each of oxygen concentration sensors disposed in upper and lower streams of an exhaust gas catalyzer of the engine. The output signal of the oxygen concentration sensor disposed on the upper stream side of the catalyzer is provided as one input signal of an air-fuel ratio control unit and the output signal of the oxygen concentration sensor disposed on the lower stream side of the catalyzer is provided as an input signal of an output signal correction amount determination unit, respectively. A mixing member for mixing an exhaust gas is disposed in an upper stream of each oxygen concentration sensor to detect the concentration of oxygen in the exhaust gas which is well mixed. The air-fuel ratio control unit controls an air-fuel ratio of a mixture gas in accordance with the output signal of the oxygen concentration sensor disposed on the upper stream side of the catalyzer and an output signal correction amount which is an output signal of the output signal correction amount determination unit. Since the exhaust gas is sufficiently mixed by the mixing member, variations of a measured value caused by the attachment position of each oxygen concentration sensor ar eliminated, thereby making it possible to control the air-fuel ratio of the mixture gas to a value close to a theoretical air-fuel ratio with a satisfactory precision.
    • 一种空燃比控制装置,其中,根据设置在上游和下游的各个氧浓度传感器的输出信号来控制供应到发动机,特别是燃气发动机的混合气体的空燃比 发动机的废气催化器。 设置在催化剂的上游侧的氧浓度传感器的输出信号被设置为空燃比控制单元的一个输入信号,并且设置在催化器的下游侧的氧浓度传感器的输出信号为 分别作为输出信号校正量确定单元的输入信号提供。 在每个氧浓度传感器的上游设置有用于混合排气的混合部件,以检测排出气体中的氧气的浓度。 空燃比控制单元根据设置在催化剂的上游侧的氧浓度传感器的输出信号和作为输出信号的输出信号的输出信号校正量来控制混合气体的空燃比 输出信号校正量确定单元。 由于废气通过混合部件充分混合,消除了由每个氧浓度传感器ar的安装位置引起的测量值的变化,从而可以将混合气体的空燃比控制在接近于 理论空燃比具有令人满意的精度。
    • 6. 发明授权
    • Air-fuel ratio control apparatus for engine
    • 发动机空燃比控制装置
    • US5251438A
    • 1993-10-12
    • US916268
    • 1992-07-21
    • Kazumi IshidaHiroshi HaraguchiToshio Kondo
    • Kazumi IshidaHiroshi HaraguchiToshio Kondo
    • F02B1/04F02D41/14F01N3/20
    • F02D41/1441F01N2240/20F02B1/04
    • An air-fuel ratio feedback control apparatus for a gas engine. A mixer mixes intake air and a fuel gas. A subsidiary supply path supplies at least one of the intake air and the fuel gas downstream of the mixer. Oxygen concentration sensors detect a concentration of oxygen in an exhaust gas; and operation condition detectors detect operating conditions of the gas engine. A basic amount setting unit sets a basic amount of at least one of the intake air and the fuel gas supplied through the subsidiary supply path. A correction amount setting unit sets a correction amount proportional to a total fuel gas supply rate, and a control amount setting unit for setting a control amount of at least one of the intake air and the fuel gas supplied through the subsidiary supply path by adding the basic amount and the correction amount together, whereby the air-fuel ratio of the gas engine can be controlled at a desired value even when a bypass supply ratio of the fuel gas varies.
    • 一种用于燃气发动机的空燃比反馈控制装置。 混合器混合进气和燃气。 辅助供应路径在混合器下游供应进气和燃料气体中的至少一个。 氧浓度传感器检测废气中的氧浓度; 并且操作条件检测器检测燃气发动机的运行状况。 基本量设定单元设定通过辅助供给路径供给的吸入空气和燃料气体中的至少一个的基本量。 校正量设定单元设定与总燃料气体供给量成比例的校正量,以及控制量设定单元,用于设定通过辅助供给路径供给的吸入空气和燃料气体中的至少一个的控制量, 基本量和校正量,由此即使当燃料气体的旁路供应比变化时,也可以将气体发动机的空燃比控制在期望值。
    • 8. 发明授权
    • Rotating drum for reclaiming molding sand and molding sand reclaiming apparatus
    • 用于回收型砂和型砂回收设备的转鼓
    • US06401798B1
    • 2002-06-11
    • US09456654
    • 1999-12-08
    • Toshio Kondo
    • Toshio Kondo
    • B02C1912
    • B22C5/10Y10S241/10
    • A molding sand reclaiming apparatus comprising an agitation tank which is provided with a fluidized bed at the inner bottom thereof and also provided with a charging port for used sand and a discharging port for reclaimed sand on the side wall thereof, a rotating shaft driven by a driving source disposed in the agitation tank; a rotating drum which is driven by the rotating shaft to agitate used sand charged into the agitation tank and peel off extraneous matters on the used sand; a classification tank which communicates with the upper part of the agitation tank via a regulating plate and is provided with a dust collecting port; and an air pressure source to fluidize the used sand charged on the fluidized bed in the agitation tank and classify, in the classification tank, the used sand into two parts of the extraneous matters peeled off by the rotating drum and the reclaimed sand, wherein scattering holes for scattering the used sand are formed in a cylinder portion constituting outside of the rotating drum.
    • 一种成型砂回收装置,包括:搅拌槽,其内底设有流化床,并且在其侧壁上设置有用于砂的加料口和再生砂的排出口,旋转轴由 驱动源设置在搅拌槽中; 由旋转轴驱动的旋转滚筒,搅拌填充到搅拌槽中的用过的砂子,并剥离用过的砂子上的外来物质; 分级罐,其经由调节板与搅拌槽的上部连通并设置有集尘口; 以及空气压力源,用于使填充在搅拌槽中的流化床上的废砂流化,并且在分级罐中将二手砂分为两部分由旋转鼓和再生砂剥离的外来物质,其中散射 用于散布用过的砂的孔形成在构成旋转滚筒外部的圆筒部中。