公开(公告)号：US3910243A

公开(公告)日：1975-10-07

申请号：US32224373

申请日：1973-01-09

Applicant: CHRYSLER CORP

Inventor： GAU LEONARD P ,  RILEY DONALD E ,  CARTER IVOR W

IPC: F02D41/36 ,  F02P3/04 ,  F02P3/045 ,  F02P5/155 ,  F02P7/067 ,  F02P5/04

CPC classification number: F02P5/1556 ,  F02P5/1558 ,  F02P7/067 ,  Y02T10/46

Abstract: An electronic spark timing advance and emission control system for a pulsed electronic ignition control unit for emission controlled internal combustion engine includes a distributor having a pair of speed responsive, signal generating pickups and a pair of electronic spark timing control channels each of which is excited by a different one of the pickups. One of the channels is operative only during engine starting intervals and triggers the electronic ignition control unit with pulses of fixed or invariable timing at the optimum starting angle of the engine in advance of the TDC position thereof. The other channel is a variable timing control channel, which is operative after starting and during engine idle and run conditions, and provides ignition triggering pulses whose occurrence in time is varied from the TDC engine position at engine idle to provide any desired degree or requisite amount of spark timing advance or retardation therefrom during off-idle engine operating conditions in accordance with various engine operating parameters, including engine speed and manifold vacuum. Additional control over the engine timing for further reduction of vehicle exhaust emissions is provided in the form of an electronic time delay circuit, which is operative above a predetermined ambient temperature and for a predetermined time interval to delay the advance otherwise called for by the manifold vacuum advance signal during the transition from a vehicle load or acceleration condition to a no-load or vehicle cruising condition.

Abstract translation: 一种用于排放控制内燃机的脉冲电子点火控制单元的电子火花正时提前和排放控制系统，包括具有一对速度响应的信号发生拾取器和一对电子火花定时控制通道的分配器，每个电子火花定时控制通道被 一个不同的拾音器。 其中一个通道仅在发动机启动间隔期间操作，并且在其TDC位置之前以发动机的最佳起始角度触发具有固定或不变定时脉冲的电子点火控制单元。 另一个通道是可变定时控制通道，其在启动之后和在发动机怠速和运行条件期间操作，并且提供点火触发脉冲，其发生时间在发动机怠速时从TDC发动机位置变化以提供任何期望的程度或必要量 根据包括发动机转速和歧管真空度的各种发动机工作参数，在怠速期间的发动机工作条件期间，火花正时提前或延迟。