Abstract
Friction reduction is an effective way to achieve better fuel economy while maintaining reduced exhaust emissions in engines. The friction characteristics in engine valve train vary directly with the operating temperature, lubricant pressure, lubricant chemistry, camshaft speed and type of engine. Substantial experimental work has been carried out on direct acting bucket tappet valve train to measure friction between cam and tappet. However, little to no experimental work has been reported to investigate friction in an end-pivoted roller finger follower valve train. In this research work, end-pivoted roller finger follower valve train has been instrumented for the first time to experimentally measure the friction drive torque. Increase in friction at cam/roller interface with rise in oil inlet temperature was observed whereas it decreased considerably with increase in camshaft operating speed. The results of measured friction under actual engine operating conditions are presented in this manuscript in detail.
| Original language | English |
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| Title of host publication | 6th International Conference on Developments in Engineering and Technology |
| Subtitle of host publication | ICDET-2017, Bangkok, Thailand. |
| DOIs | |
| Publication status | Published - 13 Feb 2017 |