Circulating mechanical power in a power-split hybrid electric vehicle transmission

Schulz, Marcus

doi:10.1243/0954407042707759

Cited by 47 publications

(26 citation statements)

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“…2) A lower maximum power flow through the electrical branch is required, which results in smaller electric machines. Developments to further reduce the size of the electric machines and further increase the transmission efficiency are done by Villeneuve [4], Schulz [5], and Kriegler et al [6]. However, these developments mostly lead to a design that is close to that of existing or automated manuals, in which the clutches are replaced by electric machines to enable continuously variable shifts.…”

Section: A Development Of Cvt Solutionsmentioning

confidence: 99%

Design of CVT-Based Hybrid Passenger Cars

Hofman

Steinbuch

Druten³

et al. 2009

IEEE Trans. Veh. Technol.

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Abstract-In this paper, the hybridization of a small passenger car equipped with a continuously variable transmission (CVT) is investigated. Designing a hybrid drive train is a multiobjective design problem. The main design objectives are fuel consumption, emissions, and performance. However, it is difficult to find a global optimal integral design solution due to the interdependence of design choices (parameters) regarding the drive-train topology, component sizes, component technologies, and control strategy, as well as the unknown sensitivity of the design objectives to the design parameters. In this paper, a parametric optimization procedure is presented to solve the design problem, where the main design objective is fuel consumption. The effects of parameter variation on fuel consumption have been investigated. Furthermore, a reduced hybrid drive-train model is introduced, with which the effects of design parameter variation is very quickly studied with an average error of less than 1.6%.

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Section: A Development Of Cvt Solutionsmentioning

confidence: 99%

Design of CVT-Based Hybrid Passenger Cars

Hofman

Steinbuch

Druten³

et al. 2009

IEEE Trans. Veh. Technol.

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“…It is appealing because with a proper control strategy, it can be designed to take advantage of both parallel and series types while avoiding their disadvantages. A major advantage of this configuration is the potential to de-couple the ICE and wheel speed as long as the output power demand is met, which offers greater flexibility in terms of choosing the ICE working point to optimize fuel consumption [1,2].…”

Section: Introductionmentioning

confidence: 99%

Assessment by Simu ation of Benefits of New HEV Powertrain Configurations

Kim

Rousseau

2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-Assessment by Simulation of Benefits of New HEV Powertrain ConfigurationsDuring the past couple of years, numerous powertrain configurations for Hybrid Electric Vehicles (HEV) have been introduced into the marketplace. The current dominant architecture is the power-split configuration with the input split (single-mode) from Toyota and Ford. General Motors (GM) recently introduced a two-mode power-split configuration for applications in sport utility vehicles. Also, the first commercially available Plug-In Hybrid Electric Vehicle (PHEV) -the GM Volt -was introduced into the market in 2010. The GM Volt uses a series-split powertrain architecture, which provides benefits over the series architecture, which typically has been considered for Electric-Range Extended Vehicles (E-REV). This paper assesses the benefits of these different powertrain architectures (single-mode versus multi-mode for HEV) (series versus GM Voltec for PHEV) by comparing component sizes, system efficiency and fuel consumption over several drive cycles. On the basis of dynamic models, a detailed component control algorithm was developed for each configuration. The powertrain components were sized to meet all-electric-range, performance and grade-capacity requirements. This paper presents and compares the impact of these different powertrain configurations on component size and fuel consumption.

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“…Furthermore, since this approach uses steady-state test data along with imposing a speed cycle, dynamics affects cannot be studied either. Few results [26]- [28], however, exist in the literature regarding mathematical dynamics plant model of a powersplit transmission (transaxle) that can be used for studying and simulating dynamics related to speed, torque, and power behavior of this subsystem.…”

Section: Introductionmentioning

confidence: 99%

“…1, the power-split HEV power train consists of two power sources, namely 1) combination of engine, generator, and planetary gear set and 2) a combination of motor and battery [6]- [8], [26]- [28]. The planetary gear set provides interconnection between the engine, generator, and motor.…”

Section: A Introduction To Power-split Power Train Operationmentioning

confidence: 99%

“…2, the engine output power can be split into two paths by controlling the generator [6]- [8], [26]- [28], namely 1) mechanical path τ r ω r (from the engine to the carrier to the ring gear to counter shaft) and 2) electrical path τ g ω g to τ m ω m (from the engine to the generator to the motor to the counter shaft). Due to the kinematics property of planetary gear set, this split in engine power is accomplished by controlling the engine speed to a desired value, independent of the vehicle speed, thereby providing an opportunity for decoupling the engine speed from the vehicle speed by varying the generator speed accordingly.…”

Section: A Introduction To Power-split Power Train Operationmentioning

confidence: 99%

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Derivation and Experimental Validation of a Power-Split Hybrid Electric Vehicle Model

Syed

Kuang

Czubay

et al. 2006

IEEE Trans. Veh. Technol.

105

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Abstract-Hybrid electric vehicles (HEVs) have attracted a lot of attention due to environmental and efficiency reasons. Typically, an HEV combines two power trains, a conventional power source such as a gasoline engine, a diesel engine, or a fuel cell stack, and an electric drive system (involving a motor and a generator) to produce driving power with a potential of higher fuel economy than conventional vehicles. Furthermore, such vehicles do not require external charging and thus work within the existing fueling infrastructures. The power-split power train configuration of an HEV has the individual advantages of the series and parallel types of HEV power train configurations. A sophisticated control system, however, is required to manage the power-split HEV power trains. Designing such a control system requires a reasonably accurate HEV system plant model. Much research has been done for developing dynamic plant models for the series and parallel types, but a complete and validated dynamic model for the power-split HEV power train is still in its infancy. This paper presents a power-split power train HEV dynamic model capable of realistically replicating all the major steady-state and transient phenomena appearing under different driving conditions. A mathematical derivation and modeling representation of this plant model and its components is shown first. Next, the analysis, verification, and validation through computer simulation and comparison with the data actually measured in the test vehicle at the Ford Motor Company's test track is performed. The excellent agreements between the model and the experimental results demonstrate the fidelity and validity of the derived plant model. Since this plant model was built by integrating the subsystem models using a system-oriented approach with a hierarchical methodology, it is easy to change subsystem functionalities. The developed plant model is useful for analyzing and understanding the dominant dynamics of the power train system, the interaction between subsystems and components, and system transients due to the change of operational state and the influence of disturbances. This plant model can also be employed for the development of vehicle system controllers, evaluation of energy management strategies, issue resolution, and verification of coded algorithms, among many other purposes.

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Circulating mechanical power in a power-split hybrid electric vehicle transmission

Cited by 47 publications

References 1 publication

Design of CVT-Based Hybrid Passenger Cars

Design of CVT-Based Hybrid Passenger Cars

Assessment by Simu ation of Benefits of New HEV Powertrain Configurations

Derivation and Experimental Validation of a Power-Split Hybrid Electric Vehicle Model

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