An Electro-Mechanical Infinitely Variable Transmission for Hybrid Electric Vehicles

Ai, Xiaolan; Anderson, Scott R.

doi:10.4271/2005-01-0281

Cited by 20 publications

(16 citation statements)

References 3 publications

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“…A major advantage of this EVT architecture is the possibility to decouple the speeds of the internal combustion engine (ICE) and wheels as long as the output power demand is met; this gives much more flexibility to choose the ICE working point in order to optimize fuel consumption and to reduce exhaust emission [7]. However, the EVT is characterized by internal power circulation.…”

Section: Introductionmentioning

confidence: 98%

Control strategy for a dual-mode electromechanical, infinitely variable transmission for hybrid electric vehicles

Kim

2008

Proceedings of the Institution of Mechanical Engineers, Part D:

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An operating strategy is proposed for a dual-mode electromechanical, infinitely variable transmission (EVT) hybrid electric vehicle (HEV). First, network analysis is performed to evaluate the dual-mode EVT efficiency with respect to the speed ratio. It is found from the network analysis that the EVT efficiency decreases when the power circulation occurs along the electric variator and the EVT should be operated in the speed ratio region that provides a relatively high system efficiency, which requires an operating strategy from the viewpoint of the overall powertrain efficiency rather than the internal combustion engine thermal efficiency. In order to develop the operating strategy of the dual-mode EVT, dynamic equations of the HEV powertrain including the EVT are obtained and the motor torque control algorithm is designed using inversion-based control. To evaluate the performance of the operating strategy, an HEV simulator is developed on the basis of the dynamic models of the HEV powertrain using Cruise and MATLAB/Simulink. The simulation results indicate that the operating strategy proposed in this study is able to operate the engine in the desired speed ratio range having a relatively high EVT efficiency, which provides improved fuel economy compared with conventional control. It is expected that the operating strategy based on the transmission efficiency can be used effectively in the design of the dual-mode EVT for HEV application.

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Section: Introductionmentioning

confidence: 98%

Control strategy for a dual-mode electromechanical, infinitely variable transmission for hybrid electric vehicles

Kim

2008

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…All feasible 2-PG modes are found, including existing ones such as those in [2,13,5]. Notably, we also found the 2-PG counterparts of the Toyota Prius and the dual-motor mode of the Chevrolet Volt, as shown in Figure 9.…”

Section: Results For 2-pg Mode Architecturementioning

confidence: 60%

“…In the following, we elaborate on the steps of mode gener-(a) Allison Hybrid System (AHS) [13] (b) Ai and Anderson [2] FIGURE 3. Bond graphs of modes in existing architectures.…”

Section: Mode Generationmentioning

confidence: 99%

“…Sample structures representing existing HEV modes from the literature are shown in Figure 3. Some architectures, such as the Alison Hybrid System (AHS) [13] and the Ai and Anderson architecture [2], contain multiple modes, and mode switching is enabled through clutches. For example, in AHS Mode 1, the clutch between PG2 and ground is engaged, resulting in higher output torque at vehicle launch.…”

Section: Hev Modes As Bond Graphsmentioning

confidence: 99%

“…Existing HEV architectures include 1-PG [9,16], 2-PG [12,11,4,3,2] and even 3-PG [14,10] systems. For a given vehicle and associated duty cycles, determining the best architecture is an open question.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design of Hybrid-Electric Vehicle Architectures Using Auto-Generation of Feasible Driving Modes

Bayrak

Ren

Papalambros

2013

Volume 1: 15th International Conference on Advanced Vehicle Technologies; 10th International Conference on Design Education; 7t

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Several hybrid-electric vehicle architectures have been commercialized to serve different categories of vehicles and driving conditions. Such architectures can be optimally controlled by switching among driving modes, namely, the power distribution schemes in their planetary gear (PG) transmissions, in order to operate the vehicle in the most efficient regions of engine and motor maps. This paper proposes a systematic way to identify the optimal architecture for a given vehicle drive cycle, rather than parametrically optimizing one or more pre-selected architectures. An automatic generator of feasible driving modes for a given number of PGs is developed. For a powertrain consisting of one engine, two motors and two PGs, this generator results in 1116 modes. A heuristic search is then proposed to find a near-optimal pair of modes for a given driving cycle and vehicle specification. In a study this process identifies a dual-mode architecture with an 8% improvement in fuel economy compared to a commercially available architecture over a standard drive cycle.

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Hybrid Car Powertrains: A Review and Analysis

Гигов

Павлов²,

Stefanova-Pavlova³

2022

Communications in Computer and Information Science

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An Electro-Mechanical Infinitely Variable Transmission for Hybrid Electric Vehicles

Cited by 20 publications

References 3 publications

Control strategy for a dual-mode electromechanical, infinitely variable transmission for hybrid electric vehicles

Control strategy for a dual-mode electromechanical, infinitely variable transmission for hybrid electric vehicles

Design of Hybrid-Electric Vehicle Architectures Using Auto-Generation of Feasible Driving Modes

Hybrid Car Powertrains: A Review and Analysis

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