公开(公告)号：US4962742A

公开(公告)日：1990-10-16

申请号：US376780

申请日：1989-07-07

申请人： Hiroyuki Nishizawa ,  Kimito Kashiwabara ,  Osamu Nako ,  Mitsuaki Ishii ,  Kouichi Yamane ,  Masaaki Miyazaki ,  Ryoji Nishiyama

发明人： Hiroyuki Nishizawa ,  Kimito Kashiwabara ,  Osamu Nako ,  Mitsuaki Ishii ,  Kouichi Yamane ,  Masaaki Miyazaki ,  Ryoji Nishiyama

IPC分类号： F02D41/04 ,  F02D23/02 ,  F02D41/00 ,  F02D41/10 ,  F02D41/24 ,  F02D41/32 ,  F02D41/34

CPC分类号： F02D41/28 ,  F02D41/0007 ,  F02D41/32 ,  Y02T10/144

摘要： A fuel injection device for an automotive spark ignition internal combustion engine provided with a supercharger is disclosed, wherein the amount of fuel injected in synchrony with the crank angle signal is determined on the basis of the intake air pressure. The increment of the air pressure data over each fuel injection period is compared with a first threshold level to determine the first augmentation. The pressure data is averaged over each fuel injection period, and the increment of the averaged pressure data over a predetermined interval of time is compared with a second threshold level to determine the second augmentation. The fundamental amount is calculated on the basis of either the instantaneous or the averaged pressure data, in dependency on the value of the first augmentation amount. The total amount of fuel that is to be injected in synchrony with every predetermined numberth pulse of the crank angle signal is calculated in each injection cycle as a sum of the fundemental amount and the first and the second augmentation when the engine is judged to be in the supercharged state; when, on the other hand, the engine is judged to not to be in the supercharged state, the total amount of fuel is calculated as the sum of the fundamental amount and the first augmentation alone. The supercharged state is detected when both the intake air pressure and the number of rpm of the engine are above respective predetermined levels.

摘要翻译： 公开了一种具有增压器的汽车用火花点火式内燃机的燃料喷射装置，其特征在于，与所述曲轴转角信号同步喷射的燃料量基于进气压力来确定。 将每个燃料喷射期间的空气压力数据的增量与第一阈值水平进行比较，以确定第一次增加。 压力数据在每个燃料喷射期间平均，并且将预定时间间隔上的平均压力数据的增量与第二阈值水平进行比较，以确定第二次增加。 根据第一次增加量的值，基于瞬时压力数据或平均压力数据计算基本量。 在每个喷射循环中计算出与曲柄角度信号的每个预定第
十个脉冲同步喷射的燃料的总量，作为当发动机被判定为在其中时的基础量与第一和第二增
加的总和 增压状态; 另一方面，当发动机被判断为不处于增压状态时，燃料的总量被单独计算为基本量和第一增加量之和。 当进气压力和发动机的转数都高于相应的预定水平时，检测到增压状态。

公开(公告)号：US4951634A

公开(公告)日：1990-08-28

申请号：US368631

申请日：1989-06-20

申请人： Hiroyuki Nishizawa ,  Kimito Kashiwabara ,  Osamu Nako ,  Mitsuaki Ishii ,  Kouichi Yamane ,  Masaaki Miyazaki ,  Ryoji Nishiyama

发明人： Hiroyuki Nishizawa ,  Kimito Kashiwabara ,  Osamu Nako ,  Mitsuaki Ishii ,  Kouichi Yamane ,  Masaaki Miyazaki ,  Ryoji Nishiyama

IPC分类号： F02D41/04 ,  F02D41/00 ,  F02D41/10 ,  F02D41/34

CPC分类号： F02D41/10

摘要： A fuel injector for a spark ignition internal combustion engine is disclosed, wherein the amount of injected fuel is increased by an extra amount when the engine is in a transient accelerating state. The air pressure within the air inlet passage to the engine is detected by an air pressure sensor, and the load condition is judged by comparing the detected pressure with a reference level. Further, the variation or increment of the detected pressure over each fuel injection period is calculated and compared with a high or a low threshold level selected in accordance with the load condition of the engine. Preferably, the high threshold level is selected when the high load condition continues over a predetermined length of time, the low threshold level being otherwise selected. The amount of transient extra increase is determined in accordance with the result of the comparison of the pressure variation with the selectd threshold level. On the other hand, the fundamental amount of injected fuel is calculated on the basis of an instantaneous current air pressure when the above amount of transient extra increase is not zero; otherwise, on the basis of an average of the pressure over the fuel injection period. The sum of the fundamental amount and the transient increase is injected in synchrony with every predetermined number pulse of the crank angle signal.

摘要翻译： 公开了一种用于火花点火内燃机的燃料喷射器，其中当发动机处于瞬态加速状态时，喷射燃料的量增加额外的量。 通过空气压力传感器检测到发动机的进气通道内的空气压力，并通过将检测到的压力与参考水平进行比较来判断负载状况。 此外，计算每个燃料喷射期间的检测压力的变化或增量，并将其与根据发动机的负载条件选择的高或低阈值水平进行比较。 优选地，当高负载条件在预定时间长度上继续时，选择高阈值电平，否则选择低阈值电平。 根据压力变化与选择阈值水平的比较的结果确定瞬时额外增加的量。 另一方面，当上述瞬时额外增加量不为零时，基于瞬时当前空气压力计算喷射燃料的基本量; 否则，基于燃料喷射期间的压力平均值。 基本量和瞬时增加的总和与曲柄角信号的每个预定数量的脉冲同步地注入。