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公开(公告)号：ZA791808B
公开(公告)日：1980-07-30
申请号：ZA791808
申请日：1979-04-17
Applicant: MOTOROLA INC
Abstract: Electronic signal processing circuitry for use in the ignition system of an internal combustion engine is disclosed herein. A signal generator which receives crankshaft position pulses from a sensor and produces periodic output pulses which have durations equal to a constant percentage of the period of the input sensor pulses is disclosed. The generator includes a crankshaft position sensor feeding a bistable flip-flop which controls a dual slope integrator circuit having its output coupled to a comparator with the comparator output coupled back to the reset terminal of the flip-flop. The generator produces pulses at the output of the flip-flop which have durations equal to a constant percentage of the period of the crankshaft position sensor pulses. The dual slope integrator circuit produces a periodic ramp (sawtoothed) signal which is processed by a clamping circuit and a comparator to produce an ignition dwell pulse which occurs a fixed time before the occurrence of the crankshaft position sensor pulses. An engine speed monitoring circuit also receives the periodic varying ramp signal produced by the dual slope integrator and via sampling circuitry produces an output signal related to engine speed whose magnitude is updated during each cycle of the crankshaft position pulses.
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公开(公告)号：ZA803113B
公开(公告)日：1981-05-27
申请号：ZA803113
申请日：1980-05-23
Applicant: MOTOROLA INC
Abstract: Digital dwell circuitry for a spark and dwell ignition control system is disclosed. Maximum advance and reference sensors are utilized to produce pulse transitions which determine positions of maximum and minimum possible advance for spark ignition with respect to the position of the engine crankshaft. For each maximum advance sensor pulse transition a main counter starts a sequential running count of speed independent clock pulses wherein the maximum count obtained by the counter is related to engine crankshaft speed. The running and maximum counts of the main counter are utilized by dwell circuitry to determine the time prior to the next maximum advance pulse at which spark coil excitation should occur. The main counter running count also determines several inputs to a read only memory (ROM) circuit whose output controls a rate multiplier. The rate multiplier receives input clock signals, provides selective frequency division for these clock signals in accordance with the ROM output, and the output of the rate multiplier is coupled to an accumulator means whose accumulated count is utilized to determine the occurrence of spark ignition by terminating spark coil excitation.
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Patent Agency Ranking
公开(公告)号：BR7902785A
公开(公告)日：1979-11-27
申请号：BR7902785
申请日：1979-05-08
Applicant: MOTOROLA INC
Abstract: Electronic signal processing circuitry for use in the ignition system of an internal combustion engine is disclosed herein. A signal generator which receives crankshaft position pulses from a sensor and produces periodic output pulses which have durations equal to a constant percentage of the period of the input sensor pulses is disclosed. The generator includes a crankshaft position sensor feeding a bistable flip-flop which controls a dual slope integrator circuit having its output coupled to a comparator with the comparator output coupled back to the reset terminal of the flip-flop. The generator produces pulses at the output of the flip-flop which have durations equal to a constant percentage of the period of the crankshaft position sensor pulses. The dual slope integrator circuit produces a periodic ramp (sawtoothed) signal which is processed by a clamping circuit and a comparator to produce an ignition dwell pulse which occurs a fixed time before the occurrence of the crankshaft position sensor pulses. An engine speed monitoring circuit also receives the periodic varying ramp signal produced by the dual slope integrator and via sampling circuitry produces an output signal related to engine speed whose magnitude is updated during each cycle of the crankshaft position pulses.
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公开(公告)号：WO1980002862A1
公开(公告)日：1980-12-24
申请号：PCT/US1980000682
申请日：1980-06-09
Applicant: MOTOROLA INC
Inventor： MOTOROLA INC , JAVERI R , PETRIE A
IPC: F02P05/08
CPC classification number: F02P3/0456
Abstract: Digital dwell circuitry (121) for a spark and dwell ignition control system (10) Maximum advance (15, 16) and reference (17, 18) sensors are utilized to produce pulse transitions (t u, t u) which determine positions of maximum and minimum possible advance for spark ignition with respect to the position of the engine crankshaft. For each maximum advance sensor pulse transition (t u) a main counter (41) starts a sequential running count of speed independent clock pulses (C u) wherein the maximum count obtained by the counter is related to engine crankshaft speed. The running and maximum counts of the main counter (41) are utilized by dwell circuitry (121) to determine the time (t u) prior to the next maximum advance pulse (t u) at which spark coil excitation should occur. The main counter running count also determines several inputs to a read only memory (ROM) circuit (48) whose output controls a rate multiplier (53). The rate multiplier (53) receives input clock signals (C2), provides selective frequency division for these clock signals in accordance with the ROM output, and the output of the rate multiplier is coupled to an accumulator means (80, 81, 82) whose accumulated count is utilized to determine the occurrence of spark ignition by terminating spark coil excitation.
Abstract translation: 用于火花和停留点火控制系统的数字驻留电路（121）（10）利用最大前进（15,16）和参考（17,18）传感器来产生脉冲过渡（t u，u u，u u u ），其确定关于发动机曲轴的位置的火花点火的最大和最小可能提前的位置。 对于每个最大提前传感器脉冲转换（t uA u），主计数器（41）开始速度无关时钟脉冲（C u）的顺序运行计数，其中由计数器获得的最大计数与发动机曲轴 速度。 主计数器（41）的运行和最大计数由驻留电路（121）利用来确定在下一个最大提前脉冲（t uA u）之前的时间（t uu w u） 应该发生 主计数器运行计数还确定几个输入到只读存储器（ROM）电路（48），其输出控制速率倍增器（53）。 速率倍增器（53）接收输入时钟信号（C2），根据ROM输出为这些时钟信号提供选择性分频，速率倍增器的输出耦合到累加器装置（80,81,82），该累加器装置 累积计数用于通过终止火花线圈激励来确定火花点火的发生。
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公开(公告)号：ZA8003113B
公开(公告)日：1981-05-27
申请号：ZA8003113
申请日：1980-05-23
Applicant: MOTOROLA INC
CPC classification number: F02P3/0456
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公开(公告)号：BR8008711A
公开(公告)日：1981-04-14
申请号：BR8008711
申请日：1980-06-09
Applicant: MOTOROLA INC
Abstract: Digital dwell circuitry (121) for a spark and dwell ignition control system (10) Maximum advance (15, 16) and reference (17, 18) sensors are utilized to produce pulse transitions (t u, t u) which determine positions of maximum and minimum possible advance for spark ignition with respect to the position of the engine crankshaft. For each maximum advance sensor pulse transition (t u) a main counter (41) starts a sequential running count of speed independent clock pulses (C u) wherein the maximum count obtained by the counter is related to engine crankshaft speed. The running and maximum counts of the main counter (41) are utilized by dwell circuitry (121) to determine the time (t u) prior to the next maximum advance pulse (t u) at which spark coil excitation should occur. The main counter running count also determines several inputs to a read only memory (ROM) circuit (48) whose output controls a rate multiplier (53). The rate multiplier (53) receives input clock signals (C2), provides selective frequency division for these clock signals in accordance with the ROM output, and the output of the rate multiplier is coupled to an accumulator means (80, 81, 82) whose accumulated count is utilized to determine the occurrence of spark ignition by terminating spark coil excitation.
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