公开(公告)号：US3702601A

公开(公告)日：1972-11-14

申请号：US3702601D

申请日：1971-06-11

Applicant: GEN MOTORS CORP

Inventor： GORDON COLIN C ,  MCGAVIC JOHN P

IPC: F02D41/36 ,  F02M51/00

CPC classification number: F02D41/36 ,  Y02T10/44

Abstract: An internal combustion engine includes a group of eight fuel injectors for applying fuel to the engine. A set of four timing signals developed in synchronization with engine operation collectively contain eight magnitude permutations per engine cycle. The occurrence of each of the magnitude permutations defines the start of injection for a corresponding one of the fuel injectors. The set of timing signals is combined to form a pair of timing signals which are combined to form a single timing signal containing all of the magnitude permutations. A single pulse train developed in synchronization with the single timing signal contain eight control pulses per engine cycle. The length of each of the control pulses defines the period of injection for a corresponding one of the fuel injectors in time compressed nonoverlapping relationship. The single pulse train is separated by the single timing signal to form a pair of pulse trains which are separated by the pair of timing signals to form a set of four pulse trains collectively containing all of the control pulses. The length of the control pulses in the set of pulse trains is extended to define the period of injection for the fuel injectors in time expanded overlapping relationship. Lastly, the set of pulse trains is separated by the set of timing signals to form a series of eight pulse trains each containing control pulses which are applied to energize a corresponding one of the group of eight fuel injectors.

Abstract translation: 内燃机包括一组用于向发动机施加燃料的燃料喷射器。 与发动机运行同步开发的四组定时信号集合包含每发动机循环8个排量。 每个大小排列的出现限定了对应的一个燃料喷射器的喷射开始。 组合定时信号以形成一对定时信号，这些定时信号被组合以形成包含所有幅度排列的单个定时信号。 与单个定时信号同步开发的单个脉冲串每个发动机循环包含八个控制脉冲。 每个控制脉冲的长度在时间压缩非重叠关系中限定对应的一个燃料喷射器的喷射周期。 单个脉冲序列由单个定时信号分离，以形成一对脉冲序列，由一对定时信号分离，以形成一组共同包含所有控制脉冲的四个脉冲串。 脉冲串组中的控制脉冲的长度被延长以在时间上扩大的重叠关系中限定燃料喷射器的喷射周期。 最后，脉冲序列组被定时信号组隔开，以形成一系列八个脉冲序列，每个脉冲序列包含控制脉冲，该控制脉冲被施加以激励该组八个燃料喷射器中相应的一个。

公开(公告)号：US3623459A

公开(公告)日：1971-11-30

申请号：US3623459D

申请日：1970-05-22

Applicant: GEN MOTORS CORP

Inventor： GORDON COLIN C ,  WILKINSON LESTER

IPC: F02D41/10 ,  F02M51/00

CPC classification number: F02D41/10

Abstract: An electronic fuel injection control system for an internal combustion engine includes an acceleration compensation circuit for increasing the amount of fuel applied to the engine during acceleration. In the control system, control pulses are produced in response to the occurrence of trigger pulses. The trigger pulses are developed in synchronization with the operation of the engine. Fuel is applied to the engine at a constant rate for the duration of each of the control pulses. The duration of the control pulses is determined as a function of a bias voltage. During acceleration of the engine, the acceleration compensation circuit varies the bias voltage so as to increase the duration of the control pulses by a substantially constant amount during an initial time period and by a linearly decreasing amount during a subsequent time period. In addition, the acceleration compensation circuit develops an extra trigger pulse in response to the onset of acceleration. Further, the acceleration compensation circuit is completely insensitive to the contact bounce of a sensing switch which detects acceleration of the engine.