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    • 21. 发明授权
    • Feedback control system for internal combustion engine
    • 内燃机反馈控制系统
    • US4314534A
    • 1982-02-09
    • US146113
    • 1980-05-02
    • Yasuo NakajimaKenji Yoneda
    • Yasuo NakajimaKenji Yoneda
    • F02D41/34F02D21/08F02D41/14F02D41/22F02D43/00F02D45/00F02P5/145F02P5/152F02P5/153F02M51/00F02M25/06F02P3/02
    • F02D41/1497F02P5/1455Y02T10/46
    • A control system for an internal combustion engine comprises a transducer for issuing a signal representative of combustion pressure in a combustion chamber, a unit consisting of a bandpass filter and a wave-form shaping circuit for issuing a signal representative of existing combustion timing of the combustion chamber by processing the signal from the transducer for detection of rapid increase of the combustion pressure; a reference timing circuit for issuing a signal representative of a predetermined reference combustion timing of the combustion chamber in accordance with operation modes of the engine, a comparator circuit for issuing a signal representative of a difference between the signal from the unit and the signal from the reference timing circuit, and a unit consisting of a discriminating circuit and an actuator driving circuit for controlling the ignition timing, the air-fuel ratio of air-fuel mixture and the amount of exhaust gas recirculated into the intake system of the engine, by processing the signal from the comparator circuit.
    • 用于内燃机的控制系统包括用于发出表示燃烧室中的燃烧压力的信号的换能器,由带通滤波器和波形整形电路组成的单元,用于发出表示燃烧的现有燃烧正时的信号 通过处理来自传感器的信号来检测燃烧压力的快速增加; 用于根据发动机的操作模式发出表示燃烧室的预定参考燃烧定时的信号的参考定时电路,用于发出表示来自该单元的信号与来自该单元的信号之间的差异的信号的比较器电路 参考定时电路,以及由识别电路和致动器驱动电路组成的单元,其通过处理来控制点火正时,空气燃料混合物的空燃比和再循环到发动机的进气系统中的排气量 来自比较器电路的信号。
    • 28. 发明授权
    • Elastic surface wave devices and method for making the same
    • 弹性表面波装置及其制作方法
    • US4028646A
    • 1977-06-07
    • US645288
    • 1975-12-29
    • Hiroshi IkushimaYasuo NakajimaKitokazu HagiwaraTakashi Nagata
    • Hiroshi IkushimaYasuo NakajimaKitokazu HagiwaraTakashi Nagata
    • H03H3/08H03H9/05H03H9/26H01L41/22H03H9/10H03H9/30
    • H03H9/1064
    • This invention provides a surface elastic wave device constituted by a unitary body of a piezoelectric plate having a pair of transducers thereon, which unitary body is embedded in a casing, and wherein the wave propagation of a surface elastic wave generated on the surface of the piezoelectric plate during excitation of the device is prevented from being transferred to the casing by a thin film inserted between the casing and the wave propagation surface of the piezoelectric plate or by using as the casing a roll of flexible sheet which has the same function of wave propagation prevention as that of the thin film. This device is advantageous because it has a low spurious signal level without incrementing insertion loss, is easy to manufacture and is inexpensive. This invention also provides an effective method of making the device.
    • 本发明提供一种表面弹性波装置,其由压电板的整体构成,其上具有一对换能器,该单体主体嵌入壳体中,并且其中在压电体表面上产生的表面弹性波的波传播 通过插入在壳体和压电板的波浪传播面之间的薄膜来防止装置的激励期间的板被转移到壳体,或者通过使用具有相同波浪传播功能的柔性片卷作为外壳 作为薄膜的预防。 该装置是有利的,因为它具有低的寄生信号电平而不增加插入损耗,易于制造并且便宜。 本发明还提供了制造该装置的有效方法。