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    • 2. 发明授权
    • Air-fuel ratio control device for internal combustion engine
    • 内燃机空燃比控制装置
    • US09212583B2
    • 2015-12-15
    • US14117440
    • 2011-05-16
    • Takahiko FujiwaraKoichi KimuraMakoto TomimatsuJunichi Suzuki
    • Takahiko FujiwaraKoichi KimuraMakoto TomimatsuJunichi Suzuki
    • F01N3/00F01N3/10F02D41/02F02D41/14F02D41/18
    • F01N3/10F01N3/101F02D41/0295F02D41/10F02D41/1441F02D41/1454F02D41/1456F02D41/18F02D41/187F02D2041/1412F02D2200/501Y02A50/2324Y02T10/22
    • An air-fuel ratio control apparatus for an internal combustion engine according to an embodiment of the invention (the present control apparatus) sets a target air-fuel ratio to a target rich air-fuel ratio when it is determined on the basis of the output value Voxs of a downstream air-fuel ratio sensor 67 that the oxygen adsorption amount of a catalyst 43 tends to be excessive, and sets the target air-fuel ratio to a target lean air-fuel ratio when it is determined on the basis of the output value Voxs that the oxygen adsorption amount of the catalyst 43 tends to be insufficient. Further, the present control apparatus determines whether or not an operation state in which a large amount of nitrogen oxide flows into the catalyst 43 is reached on the basis of “whether a predetermined condition is fulfilled”, and makes the target rich air-fuel ratio obtained when the predetermined condition is fulfilled less than the target rich air-fuel ratio obtained when the predetermined condition is not fulfilled. As a result, the concentration of a reducing agent inside the catalyst 43 can be increased before a large amount of NOx flows into the catalyst 43. Therefore, when a large amount of NOx flows into the catalyst 43, most of the NOx can be eliminated.
    • 根据本发明的实施例的内燃机的空燃比控制装置(本控制装置)在基于输出确定目标空燃比时,将目标空燃比设定为目标浓空燃比 下游空燃比传感器67的值Voxs,催化剂43的氧吸附量倾向于过大,并且当基于该催化剂43确定目标空燃比时,将目标空燃比设定为目标稀燃比 输出值Vox,催化剂43的氧吸附量趋于不足。 此外,本控制装置基于“是否满足预定条件”来确定是否达到大量氮氧化物流入催化剂43的操作状态,并且使目标浓空燃比 当预定条件满足小于当不满足预定条件时获得的目标浓空燃比时获得的。 结果,在大量的NOx流入催化剂43之前,可以增加催化剂43内的还原剂的浓度。因此,当大量的NO x流入催化剂43时,可以消除大部分的NOx 。
    • 10. 发明授权
    • Ultrasonic probe for intra-cavity diagnosis and manufacturing method thereof
    • 超声波探针用于腔内诊断及其制造方法
    • US07794401B2
    • 2010-09-14
    • US11299766
    • 2005-12-13
    • Koichi KimuraToshizumi Tanaka
    • Koichi KimuraToshizumi Tanaka
    • A61B8/14
    • A61B8/4488A61B8/12A61B8/445
    • A diagnostic ultrasonic probe for use in body cavities has at its tip an ultrasonic transducer array, which has a layered structure wherein a flexible circuit board, an electric circuit, a backing material, a piezoelectric element array, an acoustic impedance matching layer and an acoustic lens are formed atop another on a supporting member. The electric circuit includes at least one of amplifiers for amplifying echo signals from ultrasonic transducers, switches for switching over between sending the echo signals from the ultrasonic transducers and receiving drive signals for exciting the ultrasonic transducers, a multiplexer for selective-switching between the echo signals as well as between the drive signals, an A/D converter for converting the echo signals from an analog form to a digital form, and a D/A converter for converting the drive signals from a digital form to an analog form.
    • 用于体腔的诊断超声波探头在其尖端处具有超声换能器阵列,其具有分层结构,其中柔性电路板,电路,背衬材料,压电元件阵列,声阻抗匹配层和声学 透镜在支撑构件上形成在另一个上。 该电路包括用于放大来自超声波换能器的回波信号的放大器中的至少一个,用于在发送来自超声换能器的回波信号和接收用于激励超声换能器的驱动信号之间进行切换的开关,用于在回波信号之间进行选择性切换的多路复用器 以及在驱动信号之间,用于将来自模拟形式的回波信号转换为数字形式的A / D转换器和用于将来自数字形式的驱动信号转换为模拟形式的D / A转换器。