3500B and 3500C Marine Engines Caterpillar


Fuel Ratio Control

Usage:

3516B 9F2
电子控制模块(ECM)向发动机提供发动机空燃比的自动控制。 此自动控制可以获得良好的发动机性能、排气黑烟的控制和改进的燃油消耗量。 ECM调节供油量。 供油量是以进气歧管压力(增压压力)为基础来确定的。 随着增压压力的升高,更多的空气可供气缸内燃烧使用。 ECM以提供更多的燃油来响应。 ECM提供更多的燃油以便在整个发动机的运转范围均保持最佳的空燃比。

发动机电子控制系统使用户能够对空燃比控制进行微小调整。 ECM 中空燃比控制的调整是通过使用 Caterpillar 电子技师(ET)来完成的。 改变"空燃比偏移量"参数使得空燃比可以根据需要进行调整。 在正数方向设定"空燃比控制偏移量"数值将会提供较浓空燃比。 此设定将会在加速时产生较快的发动机响应。 该设定也将产生更多的黑烟。 在负数方向设定"空燃比控制偏移量"数值将会提供较稀空燃比。 此设定的结果是稍微有些慢的发动机响应和较少的黑烟。

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