SAE TECHNICAL
PAPER SERIES
2000-01-1231
MMC All Aluminum Cylinder Block for High
Power SI Engines
See quotation below:
"Fig. 19 shows the results of the ring wear measurements
of using the DBDS-additive fuel with different sulfur
concentrations. It was clear that the higher the sulfur
concentration, the greater the ring wear at low cooling
temperature."
"Influence of Cooling Water Temperature
Fig.20 shows the results of ring wear measurements by
varying the inlet cooling temperature. The lower the
coolant temperature, the greater the wear. This tendency
become more pronounced when the coolant temperature
is 40 degree celsius and below. Furthermore, even in the
case of high-sulfur fuel, ring wear is small when the water
temperature is 80 degree celsius and above. As can be
seen in Fig.17, change in coolant temperature manifests
the change in wear rather quickly.
This mechanism is as follows:
• Acids in the bore increase when coolant temperature
is low.
• The acids eliminate oil film between the bore and
piston rings.
• Abrasive wear between the bore and piston rings
increase."
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