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    • 6. 发明授权
    • Electronic ignition timing control system for internal combustion engine
    • 内燃机电子点火正时控制系统
    • US4175507A
    • 1979-11-27
    • US847815
    • 1977-11-02
    • Hisasi KawaiKazuo Iwase
    • Hisasi KawaiKazuo Iwase
    • F02P5/15F02P7/03F02P1/00F02P5/04
    • F02P7/035
    • An electronic ignition timing control system comprises a plurality of double ignition coils each being connected to the spark plugs of each set of two cylinders in a multi-cylinder engine. In addition to a large number of teeth on the periphery of the engine ring gear, there is provided a reference tooth at a predetermined angular crankshaft position for a selected set of the cylinders. The reference angular positions for the other sets of the cylinders are calculated arithmetically. A circuit including read-only-memories determines a desired ignition angle in accordance with engine operating parameters to produce a binary code signal consisting of higher order bits and lower order bits. A first comparator starts to count the number of teeth on the ring gear at the time of the detection of a reference angular position to roughly determine the ignition timing, the first comparator producing an output signal when the count value thereof reaches that of the higher bits. A second comparator starts to count the number of clock pulses of fixed frequency in response to the output signal of the first comparator to finely determine the ignition timing, the second comparator producing an ignition signal when the count value thereof reaches a value corresponding to a fractional ignition angle represented by the lower order bits.
    • 电子点火正时控制系统包括多个双点火线圈,每个点火线圈连接到多缸发动机中的每组两个气缸的火花塞。 除了在发动机环形齿轮的周边上的大量齿之外,还提供了用于所选择的气缸组的预定角度曲轴位置的基准齿。 对其他组的气缸的参考角度位置进行算术计算。 包括只读存储器的电路根据发动机操作参数确定期望的点火角,以产生由高阶位和低阶位构成的二进制码信号。 在检测基准角位置时,第一比较器开始计数齿圈上的齿数,以粗略地确定点火正时,第一比较器当其计数值达到高位时产生输出信号 。 第二比较器响应于第一比较器的输出信号开始计数固定频率的时钟脉冲数,以精确地确定点火正时,第二比较器当其计数值达到对应于分数的值时产生点火信号 点火角由较低位表示。
    • 7. 发明授权
    • Electronic ignition timing control system for internal combustion engines
    • 用于内燃机的电子点火时序控制系统
    • US4162667A
    • 1979-07-31
    • US868314
    • 1978-01-10
    • Hisasi KawaiKazuo Iwase
    • Hisasi KawaiKazuo Iwase
    • F02P5/15F02P5/04
    • F02P5/15Y02T10/46
    • An electronic ignition timing control system for an internal combustion engine which comprises a rotational angle detector for detecting a rotational angle of the engine to produce output pulses, a reference angle detector for detecting a reference rotational angle of the engine to produce a reset pulse, an ignition angle computing circuit for converting by interpolation the advance angles corresponding to principal points of engine parameter address into the retard angles from the reference angle to produce a first output signal indicative of an angle corresponding to the rotational angle of the engine and a second output signal indicative of the delay time corresponding to an angle smaller than the first output signal value, a first comparator to digitally compare the first output value of the ignition angle computing circuit with the number of the output pulses of the rotational angle detector, and a second comparator to convert the second output value of the ignition angle computing circuit into a time period whereby the instant that the conversion is completed is selected as desired ignition timing.
    • 9. 发明授权
    • Electronic ignition timing control system for internal combustion engines
    • 内燃机电子点火正时控制系统
    • US4167923A
    • 1979-09-18
    • US825052
    • 1977-08-16
    • Kazuo IwaseHisasi Kawai
    • Kazuo IwaseHisasi Kawai
    • F02P5/15F02P7/077F02P5/04
    • F02P5/15F02P7/0775Y02T10/46
    • In response to the input signal corresponding to the rotational speed of an internal combustion engine, a first read-only memory generates a binary coded signal indicative of the corresponding preliminarily written ignition retard angle from a predetermined angular position of the engine crankshaft, and in response to the input signal corresponding to the intake manifold vacuum a second read-only memory generates a binary coded signal indicative of the corresponding preliminarily written ignition retard angle. The output signals of the read-only memories are added together by an adder. A comparator compares the output signal of the adder with the number of clock pulses corresponding to the rotational angle of the crankshaft, and the ignition timing is determined by the output of the comparator.
    • 响应于对应于内燃机的转速的输入信号,第一只读存储器从发动机曲轴的预定角位置产生指示相应的预先写入的点火延迟角的二进制编码信号,并且作为响应 对应于进气歧管真空的输入信号,第二只读存储器产生指示对应的预先写入的点火延迟角的二进制编码信号。 只读存储器的输出信号由加法器相加在一起。 比较器将加法器的输出信号与对应于曲轴旋转角度的时钟脉冲数进行比较,点火正时由比较器的输出决定。