Serpentine - Extended Life Accessory Drive

Cassidy, R. L.; Fan, Shifa; MacDonald, R. S.; Samson, W. F.

doi:10.4271/790699

Cited by 13 publications

(7 citation statements)

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“…11). These accessories have many variants resulting from the different mechanical characteristics of torque load and damping requirement of different engines (refer to Cassidy et al 1979 andUlsoy et al 1985 for more details on those mechanical characteristics and corresponding accessories features). All products have been assembled in one facility using a number of different dedicated assembly lines.…”

Section: Manufacturing Co-evolution Of Automobile Engine Accessories-mentioning

confidence: 99%

Co-evolution of products and manufacturing capabilities and application in auto-parts assembly

ElMaraghy

AlGeddawy

2011

Flex Serv Manuf J

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Automotive engine accessories change frequently due to changes in design and market demands and their assembly lines also adapt to the new product requirements and new technologies. This paper presents novel co-evolution hypotheses and a model for products and their manufacturing capabilities, inspired by the biological co-evolution, which uses Cladistics analysis of the historical development data of both. The model embodies a three-fold approach; first it identifies evolution courses of products and manufacturing capabilities, then it searches for the best matching courses to ascertain manufacturing co-evolution, and finally informs future planning guided by the established co-evolution scheme. A case study of a class of automobile engine accessories and their corresponding assembly lines are modeled and used for illustration and validation. The results reveal the existence of strong symbiotic co-evolution relationships. The use of the proposed hypotheses and coevolution model increases the efficiency of synthesizing and co-developing those accessories and their assembly lines in the future by highlighting their most evolved features and revealing the need for modifying product features and/or fully exploring the available manufacturing capabilities before acquiring new ones. Nomenclature Taxa (taxon)A product variant or a manufacturing system capability n Number of taxa in one group (products or manufacturing capabilities) N Number of characters (features) of one group T P Cladogram (evolution hypothesis) of products T M Cladogram (evolution hypothesis) of manufacturing capabilities LðTÞLength of cladogram T (i.e. the number of emergent features of products or manufacturing capabilities through an evolution hypothesis) T P min Most parsimonious product cladogram (minimum length) T M min Most parsimonious manufacturing capabilities cladogram dðT P ; T M Þ Cladistic difference between two cladograms D t dðT P min ; T M min Þ Cladistic difference between products and manufacturing capabilities over two generations at t and t ? 1 dðT tþ1 ; T t Þ Cladistic difference between one side cladograms (products or manufacturing capabilities) over two generations at t and t ? 1 iIndex for x-axis location of a node in a cladogram topology jIndex for x-axis location of a node in a cladogram topology I A reference for a specific taxon J A reference for a specific terminal K A reference for a specific character (feature) b KIJ Cost of characters emergence through an evolution path (value 1 per occurrence) X ij Evolutionary branching events representation through nodes connectivity to a cladogram topology Y IJ A representation of taxa arrangement to cladogram topology terminals C KI Accounting for the existence of a specific character in a specific taxon a Kij Accounting for nodes that do not hold a specific character c J Cost of nonconforming cladogram topologies for a specific terminal w QJ Converting nodes connectivity to indices (upper matrix triangle) x QJ Converting nodes connectivity to indices (lower matrix triangle) k ...

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Section: Manufacturing Co-evolution Of Automobile Engine Accessories-mentioning

confidence: 99%

Co-evolution of products and manufacturing capabilities and application in auto-parts assembly

ElMaraghy

AlGeddawy

2011

Flex Serv Manuf J

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“…Serpentine belt accessory drive systems are used as power transmitters in automobiles ever since 1970s. 1 In belt-driven systems for engine accessories, the crankshaft pulley transmits power to accessories, such as air conditions, alternators, and pumps. The emergence of hybrid technologies, specifically the belt-driven system with ISG (integrated starter generator) shown in Figure 1, is becoming more and more popular in automotive industries for micro-hybrid vehicles.…”

Section: Motivationmentioning

confidence: 99%

“…There are some critical issues for the application of the accessory drive system with ISG: (1) an ISG needs to generate a large torque at a speed of 1000 r/min within a short time period (usually less than 0.5 s) to rotate the engine crankshaft at more than 300 r/min to start the engine 6,7 ; (2) instantaneous torque generated by ISG leads to severe vibration and shock of the belt of the accessory drive system, and vibration and shock of belt cause excessive strain, leading to premature belt failure. Since noise, vibration, and harshness (NVH) are important factors which influence the subjective responses of drivers, 8,9 there are lots of complains about the annoying noise and vibration of the accessory drive system during the instantaneous torque.…”

Section: Motivationmentioning

confidence: 99%

Modeling and dynamic analysis of accessory drive systems with integrated starter generator for micro-hybrid vehicles

Xiao

Shangguan

Deng

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part D:

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Belt-driven integrated starter generator system is a hybrid transmission that resembles the conventional serpentine belt-driven system. The system contains an integrated starter generator that performs a “start-stop” function on the engine. A two-pulley tensioner mechanism is attached to the integrated starter generator to maintain belt tension. The objectives of this paper are to develop modeling and calculation methods for estimating the performances of the belt-driven integrated starter generator system and to investigate the influence of damping of the two-pulley tensioner on vibration and shock. A systematic modeling and analysis method is proposed. The modeling method for the two-pulley tensioner is distinguished from any existing studies, which are generic for modeling the tensioner in belt-driven integrated starter generator systems with different layouts. A typical belt-driven integrated starter generator system is presented and a model is established to predict the dynamic response of rotational vibrations of pulleys, tensioner motions, and tension fluctuations. A parametric analysis is conducted to evaluate the two-pulley tensioner parameters with respect to their impact on the performances of the belt-driven integrated starter generator system.

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“…[5][6][7] Tensioners often require complicated designs to maintain belt tensions and absorb vibrations. 3,8 At present, there are two main categories of tensioners used in the engine accessory drives: the mechanical tensioner [9][10][11][12][13] and the hydraulic one. [14][15][16] Damping of the mechanical tensioner mainly comes from dry frictions, while damping of the hydraulic one is provided by hydraulic fluid.…”

Section: Introductionmentioning

confidence: 99%

Hysteretic damping characteristics of a mechanical tensioner: Modeling and experimental investigation

Zhu

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part D:

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The aim of this article is to investigate hysteretic damping characteristics of a typical tensioner used in engine accessory drive systems. An experiment device is developed to measure the friction coefficients of three contact pairs within the tensioner. Statistic results of test data show that the friction coefficient is linearly dependent on normal forces, and thus a linear function is used to describe it. An exact mathematical model and an accurate three-dimensional finite element model are proposed in this study to calculate the relationship of friction torque and rotation angle as well as the damping characteristics of the tensioner. The mathematical model and three-dimensional finite element model are verified through an experiment. Comparison indicates that both the mathematical and finite element model can accurately predict the working torque of the tensioner during operation process, while the finite element model has better accuracy in predicting the damping characteristics than the mathematical model.

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Serpentine - Extended Life Accessory Drive

Cited by 13 publications

References 0 publications

Co-evolution of products and manufacturing capabilities and application in auto-parts assembly

Co-evolution of products and manufacturing capabilities and application in auto-parts assembly

Modeling and dynamic analysis of accessory drive systems with integrated starter generator for micro-hybrid vehicles

Hysteretic damping characteristics of a mechanical tensioner: Modeling and experimental investigation

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