Comparative Analysis of Single and Combined Hybrid Electrically Variable Transmission Operating Modes

Conlon, Brendan M.

doi:10.4271/2005-01-1162

Cited by 103 publications

(49 citation statements)

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“…It uses three planetary gear sets (PG1, PG2, and PG3) and four wet clutches (C1 through C4) to allow for six different operation modes: two electrically variable transmission (EVT) modes and four fixed-gear (FG) modes. Clutch operations and quasi-static equations of motion for each mode of the system have been detailed in the literature [1,4,5]. Here, a brief description of the system and generalized representations of the equations of motion are presented for facilitate the discussions in the following sections.…”

Section: System Descriptionmentioning

confidence: 99%

“…The other two fixedgear modes will not be discussed in this paper. (See references [1,4,5] for further details. )…”

Section: System Descriptionmentioning

confidence: 99%

“…Before presenting the generalized quasi-static equations of motion, the generalized representation of the powersplit system is introduced [4,6]. The lever diagram in Fig.…”

Section: System Descriptionmentioning

confidence: 99%

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Design Optimization of Motor/Generator Full-load Characteristics in Two-mode Hybrid Vehicles

Ahn

Papalambros

2009

SAE Int. J. Passeng. Cars – Electron. Electr. Syst.

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The Engineering Meetings Board has approved this paper for publication. It has successfully completed SAE's peer review process under the supervision of the session organizer. This process requires a minimum of three (3) reviews by industry experts. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. ISSN 0148-7191 Positions and opinions advanced in this paper are those of the author(s) and not necessarily those of SAE. The author is solely responsible for the content of the paper. SAE ABSTRACTAn important benefit in adopting multi-mode hybrid powertrains is the possibility of downsizing the electric motor/generator (M/G) units. This paper discusses design optimization of M/G full-load operation envelopes. A three-dimensional operation space analysis is introduced and the full-load speed-torque envelopes of M/G units appear as constraints in the powertrain operation space. The analysis shows how the change in the M/G characteristics affects the powertrain full-load performance and how the M/G units can be downsized by combining multiple modes. When the acceleration performance of a two-mode hybrid vehicle is estimated using this analysis method, the trade-off between enhancing performance and reducing M/G fullload capacities is formulated as an optimization problem. The results show significant improvement in dynamic performance at reduced M/G cost.

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Section: System Descriptionmentioning

confidence: 99%

“…The other two fixedgear modes will not be discussed in this paper. (See references [1,4,5] for further details. )…”

Section: System Descriptionmentioning

confidence: 99%

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Design Optimization of Motor/Generator Full-load Characteristics in Two-mode Hybrid Vehicles

Ahn

Papalambros

2009

SAE Int. J. Passeng. Cars – Electron. Electr. Syst.

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“…Toyota Prius, Ford Hybrid Escape are single mode PST, which only use the input split. In this type, a power circulation which occurs at high speed has been pointed out as a main drawback [2]. To solve this problem, a dual mode PST , wherein the clutch and brake are used for the mode shift, has been investigated for ensuring high efficiency both at high and low speed [3,7].…”

Section: Introductionmentioning

confidence: 99%

Motor-Generator Control to Improve Shift Quality for a Dual Mode Power Split Transmission

Hong

Choi

Ahn

et al. 2013

WEVJ

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In this paper, a motor-generator (MG) control algorithm was proposed to improve the shift quality for a dual mode power split transmission (PST) hybrid electric vehicle (HEV). In order to analyze the shift characteristics during the mode shift, Bondgraph models for transient-state were constructed and state equations were derived. From the state equations, it was found that inertia torque of MG2 causes a transient torque during the mode shift. Based on the transient torque, a MG torque control algorithm which compensates the transient torque was developed to reduce the driveshaft torque variation. To evaluate the performance of the MG2 control algorithm, dynamic models of the dual mode PST HEV were obtained and an AMESim-MATLAB/Simulink based mode shift performance simulator was developed. It was found from the simulation results that the driveshaft torque variation was reduced by the proposed control algorithm which provides improved shift quality.

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“…And the most common hybrid powertrain structures -Parallel and Power splitwere compared taking in account fuel and electrical consumption by using dynamic programming and rule-based control method [5]- [7]. In line with 2-mode hybrid system introduction, input, output and compound split schemes are assessed in terms of fuel economy and vehicle performance analytically [8]. These literatures provides the control policy and system analysis only for HEV by using DP and forward simulation.…”

Section: Introductionmentioning

confidence: 99%

Configuration Analysis of Plug-in Hybrid Systems using Global Optimization

Kim

2013

WEVJ

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The purpose of the study is to analyze the configurations of Plug-in Hybrid Electric Vehicles (PHEV) with respect to fuel economy. Existing studies mostly focus on hybrid systems or few PHEV systems by only considering power split ratio and component efficiency. This paper adds original contribution to these literatures. First of all, this study compares and analyzes "series + α" PHEV -Input split, Series-output split and Series-parallel, which is consisted of a single Planetary gear or spur gear and clutches. Those are currently applied to mass-production vehicles such as Toyota Prius PHEV, Chevrolet Volt and Honda Accord PHEV. On top of that, it examines the impact of the transmission mechanical losses on Dynamic programming (DP) results and especially the planetary gear loss is modelled using power split ratio analysis. Lastly, the effect of Series mode for each PHEV system is examined by analysis of the theoretical system efficiency and DP in a certain driving profile. From this study the strength and weakness of PHEV systems are revealed depending on a driving condition and battery status, e.g. charging depleting (CD) or charging sustaining (CS). The PHEV system analysis in this study can help select proper system for a certain purpose.

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Comparative Analysis of Single and Combined Hybrid Electrically Variable Transmission Operating Modes

Cited by 103 publications

References 1 publication

Design Optimization of Motor/Generator Full-load Characteristics in Two-mode Hybrid Vehicles

Design Optimization of Motor/Generator Full-load Characteristics in Two-mode Hybrid Vehicles

Motor-Generator Control to Improve Shift Quality for a Dual Mode Power Split Transmission

Configuration Analysis of Plug-in Hybrid Systems using Global Optimization

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