Sizing the traction motor for optimal fuel efficiency in vehicle electrification

Liao, Y. Gene; Quail, Allen M.

doi:10.1504/ijvas.2013.053777

Cited by 4 publications

(5 citation statements)

References 23 publications

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“…The driver-PID controller actuates the accelerator position which requests torque from the engine (or the traction motor) to make a response through the driveline. 7 This method is more realistic in that it controls the powertrain in a similar way to that of an actual driver. The adjustment of the driver-PID controller determines how accurately the analytical vehicle follows the desired vehicle speed trace.…”

Section: Baseline Conventional Vehicle Modelingmentioning

confidence: 99%

Series hybrid powertrain simulation and hardware-in-the-loop application for a light-duty nontactical vehicle

Liao

Khandaker²

2014

Proceedings of the Institution of Mechanical Engineers, Part D:

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An improvement in the fuel economy of nontactical vehicles has and continues to be a significant initiative for US military ground vehicles. This paper investigates the potential improvement in the fuel economy of a prototype-built nontactical series hybrid cargo van. A baseline conventional vehicle is first modeled and validated. The current series hybrid van equipped with a lead-acid battery pack and an a.c. induction traction motor is then modeled and simulated in two driving cycles. A vehicle equipped with a nickel-metal hydride battery pack and a vehicle with a lithium-ion battery pack, together with an optimal hybrid powertrain control strategy, are simulated for further improvement in the fuel economy. The simulation results indicate improvements in the fuel economy of 39.6% and 43.6% for the vehicle with a nickel-metal hydride battery pack and the vehicle with a lithium-ion battery pack respectively. A hardware-in-the-loop application for motor-in-the-loop testing is also conducted to evaluate a permanent-magnet traction motor which is designed to replace the current induction motor. This study provides a design guideline and battery pack sizing for series hybrid powertrains in light-duty nontactical vehicles.

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Section: Baseline Conventional Vehicle Modelingmentioning

confidence: 99%

Series hybrid powertrain simulation and hardware-in-the-loop application for a light-duty nontactical vehicle

Liao

Khandaker²

2014

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…The response surface methodology was applied by Jung et al (2010) to optimize the rotor shape, especially geometry of flux barrier for reducing the vibration and noise of an integrated starter and generator (ISG). With the vehicle performance data regarded as constraints and the motor rated torque and speed regarded as design variables, Liao and Quail (2013) conducted an optimization on two belt-ISG systems and three crankshaft-ISG systems for optimal urban fuel economy.…”

Section: Introductionmentioning

confidence: 99%

“…The governing rotational vibration model of an accessory drive system with integrated starter generator and a tensioner with two pulleys was established by a so-called analytic geometry method. Some researchers (Jung et al, 2010; Jurkovic et al, 2015; Liao and Quail, 2013) are focused on design optimization of the starter generator for better performances or geometric size/cost reduction. Jurkovic et al (2015) performed design optimization on an induction machine for achieving desired performance in belted starter–alternator applications.…”

Section: Introductionmentioning

confidence: 99%

Steady-state and start-up transient responses of a belt-driven starter generator system for micro-hybrid electric vehicles

Zhu

et al. 2021

Journal of Vibration and Control

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For micro-hybrid electric vehicles, the belt-driven starter generator system is a typical idle stop–start system that is used to substitute the traditional engine front-end accessory drive system. The aim of this work is to present a method to investigate steady-state and start-up transient responses of a typical belt-driven starter generator system with twin tensioner arms for micro-hybrid electric vehicles. A dynamic model of the belt-driven starter generator system is established for this scheme, where a smoothing dynamic friction model considering the velocity-weakening effect is presented to model the tensioner dry friction. Unlike some traditional dynamic models of the belt-driven starter generator system that the engine dynamics and dynamics of the belt-driven starter generator system are decoupled, an engine dynamic model, which is embedded in the dynamic model of the belt-driven starter generator system, is also established to calculate engine resistance torques at the engine starting process stage. Influences of the tensioner dry friction and stiffness on steady-state responses of the belt-driven starter generator system especially the stick–slip oscillations of the twin tensioner arms are examined. Angular oscillations and rotation speed variations of the belt-driven starter generator pulley and C/S pulley as well as the belt tension variations during the engine starting process are calculated. Influences of the tensioner dry friction and stiffness on transient dynamic performances of the belt-driven starter generator system during the engine starting process and its starting efficiency are investigated.

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“…Design optimization of the components inside the starter generator is demonstrated by Jurkovic et al 25 and Jung et al 26 The optimal design shows a good performance as well as low vibration and noise emission. Moreover, traction motor sizes, by means of motor-rated torque and speed, are optimized by Liao and Quail Jr 27 to provide maximum urban fuel economy. The optimization process for low-cost electrical machines is presented by Schmidhofer et al, 28 which promotes the application of Belt-driven Starter Generator (BSG) technology.…”

Section: Introductionmentioning

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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Sizing the traction motor for optimal fuel efficiency in vehicle electrification

Cited by 4 publications

References 23 publications

Series hybrid powertrain simulation and hardware-in-the-loop application for a light-duty nontactical vehicle

Series hybrid powertrain simulation and hardware-in-the-loop application for a light-duty nontactical vehicle

Steady-state and start-up transient responses of a belt-driven starter generator system for micro-hybrid electric vehicles

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

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