公开(公告)号：ZA8003114B

公开(公告)日：1981-05-27

申请号：ZA8003114

申请日：1980-05-23

Applicant: MOTOROLA INC

Inventor： WRATHALL R

IPC: F02P3/04 ,  F02P3/045 ,  F02P5/04 ,  F02P5/15 ,  F02P ,  H03K

CPC classification number: F02P5/15 ,  F02P3/0456 ,  Y02T10/46

公开(公告)号：BR8008712A

公开(公告)日：1981-04-14

申请号：BR8008712

申请日：1980-06-02

Applicant: MOTOROLA INC

Inventor： WRATHALL R

IPC: F02P3/04 ,  F02P3/045 ,  F02P5/04 ,  F02P5/15

公开(公告)号：ZA803114B

公开(公告)日：1981-05-27

申请号：ZA803114

申请日：1980-05-23

Applicant: MOTOROLA INC

Inventor： WRATHALL R

IPC: F02P3/04 ,  F02P3/045 ,  F02P5/04 ,  F02P5/15 ,  F02P ,  H03K

公开(公告)号：WO1980002861A1

公开(公告)日：1980-12-24

申请号：PCT/US1980000703

申请日：1980-06-02

Applicant: MOTOROLA INC

Inventor： MOTOROLA INC ,  WRATHALL R

IPC: F02P05/04

CPC classification number: F02P5/15 ,  F02P3/0456 ,  Y02T10/46

Abstract: Ignition control system (10). Crankshaft advance (15, 16) and reference (17, 18) sensors are utilized to determine positions of maximum and minimum possible spark ignition advance. for each maximum advance pulse (t u a main counter (41) starts sequentially counting clock pulses (C u) wherein the maximum count obtained by the counter (41) is related to engine crankshaft speed. The count of the main counter (41) is utilized by a dwell circuit (121) to determine the time (t u) prior to the maximum advance pulse (t- u) at which spark coil excitation should occur. The main counter count also determines several inputs to a read-only-memory (ROM) circuit (48) whose output controls a rate multiplier (53) which receives input clock signals (C u) and provides selective frequency division for these clock signals in accordance with the ROM output. The output of the rate multiplier is coupled to an accumulator means (80, 81, 82) which provides an accumulated count which is utilized to determine spark occurrence. Pulse width modulation circuitry (56) receives an analog signal related to the amount of sensed engine vacuum pressure and produces a corresponding periodic digital two-state signal which has a duty cycle related to the magnitude of the analog vacuum signal. This signal is coupled as an input to the ROM (53) which controls the rate multiplier. In this manner the accumulator count is made to depend upon the magnitude of the analog vacuum signal.

Abstract translation: 点火控制系统（10）。 曲轴前进（15,16）和参考（17,18）传感器用于确定最大和最小可能的火花点火提前的位置。 对于每个最大提前脉冲（t u，主计数器（41）开始顺序地计数由计数器（41）获得的最大计数与发动机曲轴速度相关的时钟脉冲（C u）。 主计数器（41）的计数由驻留电路（121）利用以确定在应该发生火花线圈激励的最大提前脉冲（t-uA u）之前的时间（t U） 。 主计数器还确定对只读存储器（ROM）电路（48）的多个输入，其输出控制接收输入时钟信号（C u）的速率倍增器（53）并为这些输入时钟信号提供选择性分频 时钟信号按照ROM输出。 速率倍增器的输出耦合到累加器装置（80,81,82），其提供用于确定火花发生的累积计数。 脉冲宽度调制电路（56）接收与感测到的发动机真空压力的量相关的模拟信号，并产生具有与模拟真空信号幅度有关的占空比的对应的周期性数字双态信号。 该信号作为输入耦合到控制速率倍增器的ROM（53）。 以这种方式，累加器计数取决于模拟真空信号的大小。