3500B and 3500B High Displacement Generator Set Engines Caterpillar


Measuring Inlet Manifold Pressure

Usage:

3512B 2EZ
可以对发动机性能进行检查。 在负载测试期间确定进气歧管中的增压压力。 将此压力与技术营销资料(TMI)中的油量设定和相关信息内给定的技术参数相比较。 当发动机通向涡轮增压器的排气温度升高,但又没有发动机出现故障的确切迹象时,可使用此测试。

进气歧管的性能和正确压力在 TMI 中的油量设定和相关信息内给出。 该资料是在以下条件下拟定的:

  • 干燥大气压力测量值为 96 kPa (28.8 in Hg)

  • 外部气温为25 °C(77 °F)

  • 燃油 API 等级 35

这些条件的任何变化都可能影响进气歧管的压力。 外部空气的温度可能会高于以上给出的数值,而大气压力可能会低于以上给出的数值。 这种情况会导致进气歧管压力的测量值低于技术销售信息资料(TMI)中的压力。 如果外部空气气温过低而大气压力过高,会导致进气歧管压力测量值偏高。

燃料密度的差异会改变功率和增压。 如果燃油等级高于 API 比重等级 35,进气歧管的压力可能会低于 TMI 中给出的压力。 如果燃油等级低于 API 比重等级 35,进气歧管的压力可能会高于 TMI 中给出的压力。

确保检查压力时进气和排气不受阻。

注: 电子维修工具可用来检查进气歧管压力。

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