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    • 2. 发明授权
    • Engine control system including non-volatile memory and correction data
transfer method
    • 发动机控制系统包括非易失性存储器和校正数据传输方法
    • US4348729A
    • 1982-09-07
    • US139550
    • 1980-04-11
    • Takao SasayamaSeiji Suda
    • Takao SasayamaSeiji Suda
    • F02D41/34F02D41/26F02D45/00F02P5/15G05B9/02G06F15/20G11C7/00G11C9/00
    • F02D41/26F02P5/151Y02T10/46
    • A method and a system for engine control are disclosed. Electrical signals representing the engine operating conditions are detected, which electrical signals, together with the control data stored in a memory, are used to calculate a correction factor for correcting the control data for controlling the engine, where the correction factor is stored in a volatile memory, thus controlling the engine on the basis of the control data corrected by the correction factor. The correction factor stored in RAM is transferred to a non-volatile memory under predetermined conditions. Even if the voltage applied to RAM is reduced to a level lower than the storage ability of RAM, resulting in the loss of the stored data, the correction factor stored in EAROM is transferred back to RAM upon restoration of a normal voltage at RAM.
    • 公开了一种用于发动机控制的方法和系统。 检测表示发动机工作条件的电信号,哪些电信号与存储在存储器中的控制数据一起用于计算用于校正用于控制发动机的控制数据的校正因子,其中校正因子存储在易失性 存储器,从而基于由校正因子校正的控制数据来控制发动机。 存储在RAM中的校正因子在预定条件下传送到非易失性存储器。 即使施加到RAM的电压降低到低于RAM的存储能力的水平,导致存储数据的丢失,在RAM恢复正常电压时将存储在EAROM中的校正因子转移回RAM。
    • 3. 发明授权
    • Control system for internal combustion engine
    • 内燃机控制系统
    • US4201161A
    • 1980-05-06
    • US950572
    • 1978-10-12
    • Takao SasayamaSeiji Suda
    • Takao SasayamaSeiji Suda
    • F02D41/34F02D41/14F02D41/18F02D41/22F02D41/26F02D45/00G01F1/68G01F1/696F02D5/00
    • F02D41/26F02D41/182F02D41/2454
    • A control system for the internal combustion engine comprises means for detecting the flow rate of air sucked into the engine, as an electrical signal, means for detecting the number of revolutions of the engine, a sensor for sensing the oxygen concentration in the engine exhaust gas, a fuel injector for injecting fuel into the path of air sucked into the engine, in synchronism with the rotational angle of the engine at the required injection timing, and control means for controlling the fuel injection timing of the injector on the basis of the air flow rate signal from the air flow rate detector means, the number-of-revolutions signal from the number-of-revolutions detector means and the air-fuel ratio signal from the oxygen sensor. Under the normal operating conditions, the control means stores in a register the air flow rate signal, the number-of-revolutions signal and injection time at a given time point; judges that the signal from the oxygen sensor is within the level corresponding to the theoretical air-fuel ratio during a period longer than the air-fuel ratio transmission delay time of the fuel injector and the oxygen sensor; calculates the air-fuel ratio from the air flow rate signal, the number-of-revolutions signal and the injection time stored in the register; and stores in a memory an air-fuel ratio correction factor which is the ratio between said calculated air-fuel ratio and the initial air-fuel ratio stored already. These processes are repeated a number of times. Under the special operating conditions, the control means reads out the air-fuel ratio suitable for a particular special operating condition and controls the injection time on the basis of the air-fuel ratio obtained by correcting the read-out air-fuel ratio by the air-fuel ratio correction factor.
    • 用于内燃机的控制系统包括用于检测吸入发动机的空气的流量的装置,作为电信号,用于检测发动机的转数的装置,用于感测发动机排气中的氧浓度的传感器 ,用于在所需喷射正时与发动机的旋转角度同步地将燃料喷射到吸入发动机的空气路径中的燃料喷射器,以及用于基于空气控制喷射器的燃料喷射正时的控制装置 来自空气流量检测器装置的流量信号,来自转数检测器装置的转数信号和来自氧传感器的空燃比信号。 在正常工作条件下,控制装置将给定时间点的空气流量信号,转数信号和喷射时间存储在寄存器中; 判定在比燃料喷射器和氧传感器的空燃比传输延迟时间长的时间段内,来自氧传感器的信号处于与理论空燃比对应的水平内; 根据空气流量信号计算空燃比,存储在寄存器中的转数信号和喷射时间; 并且将已经存储的所述计算出的空燃比与初始空燃比之比的空燃比校正系数存储在存储器中。 这些过程重复多次。 在特殊操作条件下,控制装置读取适合于特定操作条件的空燃比,并且基于通过将读出的空燃比校正所获得的空燃比来控制喷射时间 空燃比校正系数。
    • 9. 发明授权
    • Pressure transducer with temperature compensation circuit
    • 带温度补偿电路的压力传感器
    • US4556807A
    • 1985-12-03
    • US522227
    • 1983-08-11
    • Kazuji YamadaHideo SatoKazuo KatoTakao SasayamaKanji KawakamiRyosaku Kanzawa
    • Kazuji YamadaHideo SatoKazuo KatoTakao SasayamaKanji KawakamiRyosaku Kanzawa
    • G01L9/04G01B7/16G01L9/00G01L9/06
    • G01L9/0054G01L9/065Y10S323/907
    • A pressure transducer is disclosed comprising a pressure sensor portion having gage resistors in bridge formed on a thin diaphragm of a semiconductor substrate, and a power supply connected to the pressure sensor portion for driving the pressure sensor. The power supply includes a first current source for supplying a temperature-dependent current equivalent to the sum of a current almost proportional to the absolute temperature and a current independent of temperature, and a second current source for sinking the current almost proportional to the temperature characteristic of the gage resistors from the current of the first current source. A temperature compensation circuit is additionally provided to drive the bridge circuit by the difference between the temperature-dependent current and the current proportional to the temperature characteristic in a constant-current driving mode, and by a voltage proportional to the current difference when the output of the bridge circuit is connected to an amplifier whose gain is dependent on temperature.
    • 公开了一种压力传感器,包括压电传感器部分,该压力传感器部分具有形成在半导体衬底的薄膜上的桥中的量规电阻器,以及连接到用于驱动压力传感器的压力传感器部分的电源。 电源包括用于提供等效于与绝对温度几乎成比例的电流和独立于温度的电流的和的温度相关电流的第一电流源,以及用于将大体上与温度特性成比例的电流吸收的第二电流源 的电流从第一个电流源的电流。 另外提供温度补偿电路以通过温度相关电流和与恒定电流驱动模式中的温度特性成比例的电流之间的差异来驱动桥式电路,并且通过与当电流差异的电流成比例的电压来驱动桥式电路 桥接电路连接到增益取决于温度的放大器。