Exhaust Temperature Is High
按照此步骤以对排气温度高进行故障诊断与排除。
- 诊断代码
- 进排气系统
- 喷油器
- 后冷器(如果适用)
连接 Caterpillar 电子技师(ET)后检查有无激活和/或记录的诊断代码。 在继续进行此步骤之前,诊断并排除所有激活的诊断代码。
检查进气是否受阻和/或有无泄漏。 进气歧管温度升高一度,会使排气温度升高大约三度。 检查排气歧管与涡轮增压器之间有无泄漏。 检查排气是否受阻。
喷油过多的故障喷油器会提高排气温度。 连接 Cat ET 以确定是否存在喷油器电磁阀的诊断代码。 执行"喷油器电磁阀测试"。 观察 Cat ET 对喷油器电磁阀励磁。 执行"断缸测试"。 找出缺火气缸。 请参阅故障诊断与排除, "喷油器电磁阀 - 测试"。
进气歧管压力正常,排气温度高的情况可能是由于后冷器芯的散热片阻塞造成的。
如果应用有后冷器,检查后冷器是否工作正常。 检查后冷器芯有无堵塞。
Caterpillar Information System:
3408E and 3412E Engines for Caterpillar Built Machines Cylinder Head
C15 and C18 Generator Set Engines Radiator Top Tank - Remove and Install - Jacket Water Heater
C15 and C18 Generator Set Engines Radiator Bottom Tank - Remove and Install - Jacket Water Heater
C9 Marine Generator Set Starting the Engine - Marine Certification Society (MCS) Control Panel
C6.6 Industrial Engine Engine Oil and Filter - Change
3176C, 3406E and 3456 Industrial Engines Engine Has Mechanical Noise (Knock)
G3500 A3 Engines Fuel Energy Content
C7.1 (Mech) Industrial Engine Alternator - Inspect
C6.6 Industrial Engine Refill Capacities and Recommendations
C1.1, C1.5 and C2.2 Engines for Caterpillar Built Machines Governor - Adjust
C4.4 Industrial Engine Fuel Related Components in Cold Weather
C15 Petroleum Engine Cooling System Supplemental Coolant Additive (SCA) - Test/Add
C15 and C18 Generator Set Engines Radiator Core - Remove and Install - Jacket Water Heater
C6.6 Engines for Caterpillar Built Machines Fuel Filter Base - Remove and Install - Secondary Fuel Filter
C6.6 Engines for Caterpillar Built Machines Fuel Transfer Pump - Remove
C6.6 Engines for Caterpillar Built Machines Fuel Transfer Pump - Install
C6.6 Engines for Caterpillar Built Machines Fuel Manifold (Rail) - Remove and Install
C6.6 Engines for Caterpillar Built Machines Fuel Injection Lines - Remove
C6.6 Engines for Caterpillar Built Machines Fuel Injection Lines - Install
C6.6 Engines for Caterpillar Built Machines Fuel Injection Pump - Remove
C6.6 Engines for Caterpillar Built Machines Fuel Injection Pump - Install
C6.6 Engines for Caterpillar Built Machines Fuel Injection Pump Gear - Remove
C6.6 Engines for Caterpillar Built Machines Fuel Injection Pump Gear - Install
C6.6 Engines for Caterpillar Built Machines Turbocharger - Remove - Side Mounted Turbocharger