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Aug 27.2010 The abstract of DU technical presentation published at the CIMAC Congress

CIMAC (Conseil International des Machines à Combustion, The International Council on Combustion Engines) was held in Bergen, Norway from 14th to 17th of June, 2010. We delivered a technical presentation of a new evaluation kit for the risk of abrasive wear.

Development of a new evaluation kit for the risk of abrasive wear
Customer support department, new business development group
Naohiro Yamada
1. Introduction
Catalytic fines in HFO may cause negative effects on main engines including abrasive wear and others.
ICP analysis method is currently available for detection Al + Si. We need more than that as there are cases of high abrasive wear even though the FO contains low level of Al + Si.
Furthermore, the analysis method requires special inspection.
It takes time and is difficult to get the inspection result quickly.
In order to solve above, a new method has been developed.

2. Experiments
Using a newly developed measuring device (TF-Detector and sliding kits), we measured in HFO. Experiments we did are as under.

A. Experiment on normal FO
   ⇒Low Fe content was confirmed.
B. Experiment on FO which caused some scratches on piston rings, though it contains low level of Al + Si.
   ⇒High Fe content was confirmed and hard particles were confirmed as well.
C. Experiment on FO which caused damage on all cylinders in past.
   ⇒High Fe content was confirmed.
D. Experiment on FO which was collected from before fuel purifier.
   ⇒High Fe content was confirmed.

3. Conclusion
The above results show that not only the quantity but also the size of catalytic fines in FO is an important factor to evaluate a risk abrasive wear on the sliding components of diesel engines.
The new method we have developed is simple, and easy to evaluate a risk of abrasive wear before FO is used.
We’re sure that the new evaluation method help preventing abrasive wears in engines.