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Daf xf 105 - replacement of the cylinder liner with a sleeve with a fire ring

kaczy2214 6615 8
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #1 16194866
    kaczy2214
    Level 14  
    Hello.
    The question is, can I replace one of the cylinder liners from a normal cylinder liner with a fire ring liner?
    Does the fire ring affect fuel combustion?
    Will a fire ring cylinder burn fuel the same way?
    Will the engine run smoothly?
    My doubts come from the fact that I do not know if a thin metal ring can heat up enough that it will ignite the fuel at the wrong time and the injection correction will not handle it.
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  • #2 16195137
    Megawe
    Level 34  
    Hello, measure the difference in the diameter of the hole in the head gasket and this ring. The thickness of the gasket is also important. If the head presses the fire ring, the sleeve will break. A minimal reduction in the combustion chamber will not affect the operation of the engine. After assembly, you can measure the pressure on the cylinders.
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  • #3 16195372
    kaczy2214
    Level 14  
    The dimensions are ok, everything is correct, but I am worried about the heating of this ring, will it make a difference in the fuel consumption
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  • #4 16195715
    omnibus111
    Level 15  
    The "fire" ring has a working temperature similar to a normal cylinder liner in this place, because it fits tightly to the cylinder liner. The main task of the above-mentioned ring is to keep the upper part of the piston above the rings clean (it has a smaller inner diameter than the liner in which it is embedded. The piston also above the rings has a smaller diameter.
  • #5 16197209
    kaczy2214
    Level 14  
    You don't have to explain what the ring is for, the question is whether the ring has no effect on ignition.
    The ring is not tightly fitted, it slides in, the gap between the sleeve and the ring is hundredths of a millimeter, but any gap that is not is an insulator to a greater or lesser extent
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  • #6 16197778
    krisbrumm
    DAF Trucks specialist  
    Ask yourself: What causes the fuel in a diesel engine to self-ignite? These are not hot elements that ignite the fuel spray. Read what combustion delay, flame propagation is and think ...
  • #7 16197875
    kaczy2214
    Level 14  
    Probably hot air and this hot air probably comes from the pressure and the hot elements, as I guess, increase the temperature in the cylinder and this is probably why the engine is more efficient after warming up. Did I get it ???
  • #8 16197936
    krisbrumm
    DAF Trucks specialist  
    bingo. the fuel is ignited by spraying in hot air (there is even a maximum diameter of the droplets for a given pressure and temperature in the cylinder above which the fuel will not self-ignite).
  • #9 16316879
    kaczy2214
    Level 14  
    The installation of the sleeve with the ring did not make any difference in the engine operation, unfortunately there was no time to test the parameters.
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Topic summary

The discussion revolves around the feasibility of replacing a standard cylinder liner in a Daf XF 105 engine with a fire ring liner. Key concerns include the potential impact of the fire ring on fuel combustion, ignition timing, and overall engine performance. Participants emphasize that the fire ring operates at a temperature similar to that of a normal liner and is designed to keep the piston area clean. The ignition of fuel in diesel engines is primarily due to hot air and pressure rather than direct contact with hot elements. Ultimately, one user reported that the installation of the sleeve with the fire ring did not affect engine operation, although further testing of parameters was not conducted.
Summary generated by the language model.
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