نویسندگان
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In order to develop more efficient engines, it is essential to optimize the lubrication circuit of the power
train systems. In this paper, during an engine design and development process, a network analysis of the
engine lubrication system is described in detail. Two elements have been added to the lubrication circuit
in the modified engine. These elements are hydraulic lifters and an Anti-drain valve. The effect of adding
and changing the mentioned elements and increasing the bearing clearance has been investigated on oil
pump capacity. Also, chain tensioner and anti-drain valve as two new important components in the lubrication
system have been investigated as well as other components from tribological point of view. Improving
chain tensioner material from Nitride Butyl Rubber to Poly-Amid and changing the oil jet hole position
and diameter, reduce the intensity of wear to the standard level without significant decreasing of main galley
pressure. Adding an anti-drain valve near hydraulic lifter gallery decreases the time which oil needs
to reach lifters with sufficient pressure at engine startup. The analyses are done by Flowmaster7.6 and
AVL-EXCITE7.02 software and an accessory code. Finally, theoretical results are validated by a completely
controlled lubrication functional test.
کلیدواژهها [English]
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