Reciprocating engines

Preditec provides predictive maintenance services for reciprocating engines by both laptops and by continuous measurement systems.

Comprehensive service and predictive diagnostic measurements in reciprocating engines - PRE -7019

Predictive maintenance of combustion engines and internal combustion engines is based on the multi-channel signal processing in cylinder pressure, vibration, high and low frequency, ultrasonic, temperature and voltage ignition.

The timing of actions is performed with an encoder or tachometer, which is the reference piston position , both in diesel compression ignition engines and spark ignition GAS electric spark.

From the closed curve PV power is calculated thermodynamic indicated or each cylinder engine (IHP ) and can also establish the equilibrium condition in peak firing pressure (PFP ) .

From the open loop pressure correlated with other variables mechanical be detected:

  • Lean fuel injection
  • Leaking valves and segments
  • Wear on the drive train elements of valves
  • Scuffs and scratches on camisasHolguras in rod caps
  • Damaged crankshaft bearings
  • Turbochargers Problems
  • Problems in water and oil pump
  • Structural vibrations in the beds and foundations
  • Faulty spark plugs and ignition circuits primary or secondary

Predictive diagnostics of functional condition and a mechanical combustion engine is based on the analysis of the cylinder pressure curve (PV), according to the following procedure:

  • In -cylinder pressure measurement, synchronized with the crankshaft position by reference encoder or tachometer neutral
  • Synchronized mechanical variables measurement on the pattern of pressure (vibration, ultrasonic, temperature)
  • Experimental calculation indicated power (IHP) with statistical evaluation of dispersion and uneven pressures on PFP), and analysis of crank effort by composition of the experimental static (pressure) and the theoretical dynamic load (alternative train inertia)
  • Identification of combustion and ignition problems, dynamic settings of valves and mechanical impacts and alternative train bench supports.
  • Report mechanical functional condition and remedial recommendations.
  • Contact us for more information on this service.