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New “Energy Efficient” Balance Shaft / Oil Pump Module for Hyundai NF
Technical Paper
2006-01-0405
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The Balance Shaft/Oil Pump Module for the new Hyundai Sonata NF Inline 4-cylinder engine family combines excellent NVH (noise, vibration and harshness, or “pleasibility”) and power consumption performance with minimized contribution to oil aeration. A two-stage drive ratio step-up and a balance shaft operating shape control strategy help minimize drive system noise emissions. Oil system noise emissions are minimized by dividing work between two gerotor pumps, and by the avoidance of cavitation at high speeds. Oil system performance benefits include high displacement at low speeds without attendant high power consumption or risk of cavitation at high speeds. A jet pump is used to efficiently recycle unused engine oil at high speeds, to both preserve energy and to resist cavitation, by boosting inlet pressure to the low speed flow-supplementing gerotor.
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Killion, D., Chevalier, S., Tabbert, D., Joo, S. et al., "New “Energy Efficient” Balance Shaft / Oil Pump Module for Hyundai NF," SAE Technical Paper 2006-01-0405, 2006, https://doi.org/10.4271/2006-01-0405.Also In
References
- Balancing means for reciprocating engines
- Anti rattle engine balancer which drives associated oil pump
- Static unbalance-type balance shafts with axis alignment preservation
- High value static unbalance-type balance shafts
- Energy efficient fluid pump
- Improved energy efficient fluid pump
- Effectively the ratio of output flow to engine divided by unused oil flow
- Oil/air scavenging system for balance shaft housings