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210 pages

Modeling and Optimization Under Uncertainty of Drivetrain Dynamics for Clunk Disturbance


8.2.1 Special Cases of Time-Dependent Metamodeling This section describes two special cases of time-dependent metamodeling; the partial function case and the inverse non-parametric case. Both cases are extensions of the parametric and ...

Publisher: ProQuest

About this book
Quality and performance are two important customer requirements in vehicle design. Driveline clunk negatively affects the perceived quality and must be therefore, minimized. This is usually achieved using engine torque management, which is part of engine calibration. During a tip-in event, the engine torque rate of rise is limited until all the driveline lash is taken up. However, the engine torque rise, and its rate can negatively affect the vehicle throttle response which determines performance. Therefore, the engine torque management must be balanced against throttle response. In practice, the engine torque rate of rise is calibrated manually. This research describes an analytical methodology for calibrating the engine torque, with and without considering uncertainty, in order to minimize the clunk disturbance, while still meeting throttle response constraints. A set of predetermined engine torque profiles which span the practical range of interest, are used and the transmission turbine speed is calculated for each profile using a bond-graph vehicle model. The turbine speed quantifies the clunk disturbance. Using the engine torque profiles and the corresponding turbine speed responses, time-dependent metamodels are created using principal component analysis and Kriging. The metamodels predict the turbine speed response due to any engine torque profile and are used in a deterministic and reliability-based optimization to minimize the clunk disturbance while still meeting the throttle response target. Compared with commonly used production calibration, the clunk disturbance is reduced substantially, without negatively affecting the vehicle throttle response. Also, the methodology has been successfully applied in minimizing clunk using experimental data. The results validated the proposed approach and showed that it can be used in both experimental and analytical studies.

336 pages

Battery Management Systems, Volume II: Equivalent-Circuit Methods

Creator: Gregory L. Plett | Technology & Engineering - 2015-12-01

rollCoef = rollCoef; ciency: gearRatio,gearInertia,gearEfficiency,pack,motor, wheel) drivetrain. ... The setupDrivetrain function stores data in the fields of the drivetrain structure, including a computation of drivetrain efficell SOHs cell SOCs  ...

Publisher: Artech House

About this book
This second volume discusses state-of-the-art applications of equivalent-circuit models as they pertain to solving problems in battery management and control. Readers are provided information on how to use models from Volume I to control battery packs, along with discussion of fundamental flaws in current approaches. In addition, Volume II introduces the ideas of physics-based optimal battery controls and explains why they can be superior to the state-of-the-art equivalent-circuit controls.

496 pages

The Car Care Book

Creator: Ronald Haefner | Technology & Engineering - 2008-12-17

DRIVETRAIN. OBJECTIVES. After reading this chapter, the reader should be able to: List the functions of the drivetrain. List the mechanisms that make up a drivetrain. List the sections and components that make up a manual transmission.

Publisher: Cengage Learning

About this book
Consumers typically face three main challenges when it comes to understanding their automobiles: the technologies underlying the car's major systems, the basics of inspection and maintenance, and the financial aspects of owning and operating an automobile. In this updated edition, The Car Care Book, 4th Edition explores these areas, using the very latest automobile technology to provide an accurate, current context for learning. The book first breaks each section of the car into systems and subsystems to help the reader digest important concepts. Coverage then progresses to include the common tools needed to perform car maintenance and minor repairs, as well as building a preventive maintenance program. Concluding with a section on financial issues, from buying and selling to insurance considerations to the benefits of leasing, this resource provides a thorough and comprehensive overview of basic automobile care.Important Notice: Media content referenced within the product description or the product text may not be available in the ebook version.

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