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I. Combustion System Abnormalities

Poor Fuel Atomization

  1. Enlarged fuel particles due to wear of precision components in injectors (common in long-running units)
  2. Improper fuel injection pressure adjustment leading to abnormal spray patterns
  3. Carbon deposit blockage at injector nozzle causing deviation in spray angle

Combustion Timing Misalignment

  1. Injection timing deviation exceeding the ±3° technical specification range
  2. Phase mismatch caused by wear in the timing gear assembly
  3. Valve timing disruption due to excessive camshaft geometric tolerance

II. Thermodynamic System Faults

Abnormal Cylinder Compression

  1. Loss of piston ring elasticity leading to decreased compression ratio (detectable with a cylinder pressure tester)
  2. Gas leakage due to erosion of valve seat sealing surfaces
  3. Compression gas leakage caused by excessive cylinder liner ovality

Heat Exchange System Intrusion

  1. Thermal fatigue cracks in cylinder head gasket characterized by abnormal coolant consumption
  2. Progressive erosion penetration of wet-type cylinder liners
  3. Hidden fault modes of internal leakage in the EGR cooler

III. Environmental Adaptability Factors

Cold Start Conditions

  1. Extended duration of white smoke when preheating system is not activated below -10°C
  2. Uneven preheating among cylinders in multi-cylinder units
  3. Analysis of compatibility between fuel pour point and ambient temperature

IV. Influence of Auxiliary Systems

Turbocharging System

  1. Periodic white smoke caused by internal condensation in the intercooler
  2. Air-fuel ratio abnormalities due to turbo pressure fluctuations

Lubrication System Interference

  1. Progressive failure of oil seals in the turbocharger bearing housing
  2. Oil blow-by caused by carbon buildup at piston ring grooves

V. Fault Diagnosis Methodology

Phased Feature Analysis Method

  1. Comparison of white smoke characteristics during cold start and warm operation
  2. Observation of white smoke intensity fluctuations during load changes

Multi-Parameter Correlation Diagnosis

  1. Correlation analysis between exhaust gas temperature and coolant temperature
  2. Verification of match between fuel consumption rate and power output

VI. Engineering Solutions

Dynamic Adjustment Strategies

  1. Injection timing compensation settings for various ambient temperatures
  2. Optimization of actuator parameters in variable geometry turbochargers

Preventive Maintenance Measures

  1. Scheduled monitoring intervals for precision components in the fuel system
  2. Application of digital detection technology for cylinder sealing integrity

Yangzhou Vosto machinery established in 2010, is an manufacturer of diesel generator in China, integrates design, supply, commissioning and maintenance of diesel generator set.
Vosto machinery attach great importance to CUMMINS, PERKINS, WEICHAI POWER, DEUTZ, DOOSAN, VOLVO, STAMFORD, MECCALTE and other world-class manufacturer partners, and established a long-term and stable OEM partnership, relying on its global supply and service system, to provide our products and customers with strong supply support and service guarantee.