Measuring Inlet Manifold Pressure
可以检查发动机的性能。 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信息 (TMI) 中的燃油设置和相关信息内给定的技术规格相比较。 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 中的燃油设置和相关信息资料内给出。 该资料是在以下条件下拟定的：
- 干式大气压力为 96 kPa (28.8 in Hg)
- 外部气温为25 °C（77 °F）
- 燃油等级为 35 API
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。 此操作会导致进气歧管压力的测量值低于 TMI 中给定的压力。 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。
燃油密度差异也会使马力(失速速度)和增压压力发生变化。 如果燃油额定值高于 35 API。 进气歧管中的压力可能会低于 TMI 中给定的压力。 如果燃油额定值低于 35 API。 进气歧管中的压力可能会高于 TMI 中给定的压力。 确保检查压力时进气和排气不受阻。
注: Caterpillar 电子技师 (ET) 可用于检查进气歧管压力。
Caterpillar Information System:
3512B, 3512C, and 3516B Generator Set Engines with Dynamic Gas Blending Engine Governing - Adjust
3516C Generator Set Engines Lubrication System Operation
924K, 930K and 938K Wheel Loaders Electrohydraulic System Check Valve (Secondary Steering)
C13 Generator Set Generator Lead Connections
826K Landfill Compactor Selective Catalytic Reduction Warning System
3516C Generator Set Engines Aftertreatment Identification Module - Test
3516E Generator Set Engine 100 Hour Free Configuration on Engine Start-up
3516C Generator Set Engines Data Link Configuration Status - Test
CEM Locomotive Aftertreatment Diesel Exhaust Fluid Pump - Replace
2012/02/08 A New Air Shutoff Is Used on 3606, 3608, and C280-8 Engines {1071, 1078}
725C2 Articulated Truck Diesel Exhaust Fluid Filter - Replace - Emission Related Component
3516C Generator Set Engines Cold Cylinder Cutout
C175-16 and C175-20 Generator Set Engines Fuel Temperature Is High - Sensor is Located at the Fuel Filter Base
2011/12/15 New Software Is Now Available for Product Link (PL 121) {7602, 7610, 7620}
2012/09/11 Generator Maintenance and Protective Relays Benefit the Service Life of Generator on Certain Cat® Products {4450}
PL87 Pipelayer Machine Systems Alternator
C175-16 and C175-20 Generator Set Engines Fuel Temperature Is High - Sensor is Located at the Fuel Manifold
3516C Generator Set Engines Crankshaft Position for Fuel Injector Adjustment and Valve Lash Setting
D Series Excavator Monitoring System Configuration Mode
2011/12/19 Use the FT3193 Harness Assembly to Communicate with the Adem II 6X/6U ECM on Certain Truck Engines {1408, 1901}
2011/12/19 Use the FT3193 Harness Assembly to Communicate with the Adem II 6X/6U ECM on Certain Industrial Engines {1408, 1901}
2011/12/22 A New O-ring and Oil Pan Drain Plug Are Now Used on Certain C12 Marine Engines {1302, 7553, 7555}
2014/07/07 An Improved Guide Spring and Valve Lifter Assembly Are Used in Certain C-9, C9 ACERT Engines, and C9.3 ACERT Engines {1108}
2011/12/15 Procedure to Remedy Loose V-belts on Certain C18 and C32 Marine Engines {1207, 1358, 1359, 1397}