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Design Optimization of FEAD System to Meet Durability Target in a New Vehicle Development Program
Technical Paper
2014-01-1636
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Front end accessory drive (FEAD) system explained in this paper is a sub-system of an engine. In FEAD system, a poly-v belt is used to drive the alternator and water pump by transmitting power from crankshaft pulley. In a new vehicle development program, durability targets of FEAD system are based on required life of poly-v belt, its static tension readjustment interval and replacement frequency. To meet these durability targets following methodology is applied in design stage:-
- 1Simulation of FEAD system to calculate the theoretical life of belt
- 2Part level testing of belt as per SAE J2432
These methods give sufficient information on belt durability. However in actual usage, certain failures are prone to happen and enormous difference is always observed between theoretical and actual life of belt.
This paper describes the traditional stair-case approach followed to optimize the FEAD system based on the outcome of durability tests. Component level test results of poly-v belt, like belt elongation and belt wear verified in actual engine level testing for improving the belt durability.
General test duration for durability is approximately 40 working days depending upon test hours. This paper describes the check points and criteria to predict the performance of 40 days of durability test on the basis of initial 10 days (which is very practical) for evaluation of design changes thereby saving significant amount of development time.
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Authors
Citation
Kumar, N., Gautam, A., and Gupta, V., "Design Optimization of FEAD System to Meet Durability Target in a New Vehicle Development Program," SAE Technical Paper 2014-01-1636, 2014, https://doi.org/10.4271/2014-01-1636.Also In
References
- Shigley Joseph E. and Mischke Charles R. Standard Handbook of Machine Design
- SAE International Surface Vehicle Recommended Practice V-Ribbed Belts and Pulleys SAE Standard J1459 Dec. 2009
- Good year Engineered products User manual of belt frequency meter
- Erickson Wallace D. Belt Selection and application for engineers
- Belt Supplier FEAD system Simulation report Maruti Suzuki India Limited 2012
- Belt supplier Part level test reports Maruti Suzuki India Limited 2012