Fuel economy improvements for urban driving: Hybrid vs. intelligent vehicles

Manzie, Chris; Watson, Harry C.; Halgamuge, Saman K.

doi:10.1016/j.trc.2006.11.003

Cited by 125 publications

(56 citation statements)

References 6 publications

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“…Driving cycles are important components for evaluating vehicles and play a fundamental role in vehicle design since the driving cycle affects the cost, fuel consumption, and the emissions of vehicles (Liaw and Dubarry, 2007;André and Rapone, 2009;Ericsson, 2000). In the past driving cycles have mainly been used to assess exhaust gas emissions of vehicles (André, 2004;André et al, 2006;Wang et al, 2000;Fontaras et al, 2009;Wang et al, 2008;Zervas and Bikas, 2008;Pelkmans and Debal, 2006) but they can also be used to evaluate different control strategies for vehicles as in (Pisu and Rizzoni, 2007;Koot et al, 2005;Manzie et al, 2007;Park et al, 2009;Gao et al, 2009;Stockar et al, 2011). Driving cycles have also been used in vehicle design and sizing of components (Maxoulis et al, 2004;Hellgren and Jonasson, 2007;Smith et al, 2011;Souffran et al, 2012;Murgovski et al, 2012;Jaafar et al, 2013;Pourabdollah et al, 2013;Hu et al, 2014).…”

Section: Populärvetenskaplig Sammanfattningmentioning

confidence: 99%

Evaluation, Generation, and Transformation of Driving Cycles

Nyberg

2015

Linköping Studies in Science and Technology. Dissertations

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Driving cycles are important components for evaluation and design of vehicles. They determine the focus of vehicle manufacturers, and indirectly they affect the environmental impact of vehicles since the vehicle control system is usually tuned to one or several driving cycles. Thus, the driving cycle affects the design of the vehicle since cost, fuel consumption, and emissions all depend on the driving cycle used for design. Since the existing standard driving cycles cannot keep up with the changing road infrastructure, the changing vehicle fleet composition, and the growing number of vehicles on the road, which do all cause changes in the driver behavior, the need to get new and representative driving cycles are increasing. A research question is how to generate these new driving cycles so that they are both representative and at the same time have certain equivalence properties, to make fair comparisons of the performance results. Besides generation, another possibility to get more driving cycles is to transform the existing ones into new, different, driving cycles considering equivalence constraints.With the development of new powertrain concepts the need for evaluation will increase, and an interesting question is how to utilize new developments in dynamometer technology together with new possibilities for connecting equipment. Here a pedal robot is developed to be used in a vehicle mounted in a chassis dynamometer and the setup is used for co-simulation together with a moving base simulator that is connected with a communication line. The results show that the co-simulation can become a realistic driving experience and a viable option for dangerous tests and a complement to tests on a dedicated track or on-road tests, if improvements on the braking and the vehicle feedback to the driver are implemented.The problem of generating representative driving cycles, with specified excitation at the wheels, is approached with a combined two-step method. A Markov chain approach is used to generate candidate driving cycles that are then transformed to equivalent driving cycles with respect to the mean tractive force components, which are the used measures. Using an optimization methodology the transformation of driving cycles is formulated as a nonlinear program with constraints and a cost function to minimize. The nonlinear program formulation can handle a wide range of constraints, e.g., the mean tractive force components, different power measures, or available energy for recuperation, and using the vehicle jerk as cost function gives good drivability.In conclusion, methods for driving cycle design have been proposed where new driving cycles can either be generated from databases, or given driving cycles can be transformed to fulfill certain equivalence constraints, approaching the important problem of similar but not the same. The combination of these approaches yields a stochastic and general method to generate driving cycles with equivalence properties that can be used at several instances during the prod...

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Section: Populärvetenskaplig Sammanfattningmentioning

confidence: 99%

Evaluation, Generation, and Transformation of Driving Cycles

Nyberg

2015

Linköping Studies in Science and Technology. Dissertations

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“…The assumption of prior-knowledge about the "drive cycle" is unrealistic and it is used just for off-line optimization of power management. To overcome this drawback, methods such as drive cycle recognition [54], and the use of GPS data [55,56] are developed and applied to real-time power management. However, they are based on the past and present vehicle velocity information.…”

Section: Real-time Power Managementmentioning

confidence: 99%

Review and Comparison of Power Management Approaches for Hybrid Vehicles with Focus on Hydraulic Drives

Karbaschian

Söffker

2014

Energies

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Abstract:The main advantage of hybrid powertrains is based on the efficient transfer of power and torque from power sources to the powertrain as well as recapturing of reversible energies without effecting the vehicle performance. The benefits of hybrid hydraulic powertrains can be better utilized with an appropriate power management. In this paper, different types of power management algorithms like off-line and on-line methods are briefly reviewed and classified. Finally, the algorithms are evaluated and compared. Therefore, different related criteria are evaluated and applied.

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“…Energy conservation is an important aspect of sustainable development; the core of sustainable development is development, but requires strict control of population, improve quality and protect the environment, under the premise of sustainable use of resources through energy conservation and other specific ways, conduct economic and social development [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Research on Problems and Measures of Energy-Saving in Electric Power

Cheng¹

2015

Proceedings of the 2015 International Conference on Mechatronics, Electronic, Industrial and Control Engineering

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Abstract-Thermal power enterprises as the backbone of China's power industry, which relies on the conversion of thermal energy to produce clean electricity, while heat production is an energy consuming process. Implementation of emission reduction is to implement the scientific development and building a harmonious socialist society major initiatives is the inevitable choice to achieve sustainable development. Through a comprehensive analysis of the national energy saving and power situation, put the power industry the importance of energy conservation and emission reduction pathways analyzed several problems existing in China's energy conservation work, noting that by adjusting the layout of the power industry, strengthen scientific research and technical means to adjust the work of the three measures, the final recommendations summarized several aspects.

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Fuel economy improvements for urban driving: Hybrid vs. intelligent vehicles

Cited by 125 publications

References 6 publications

Evaluation, Generation, and Transformation of Driving Cycles

Evaluation, Generation, and Transformation of Driving Cycles

Review and Comparison of Power Management Approaches for Hybrid Vehicles with Focus on Hydraulic Drives

Research on Problems and Measures of Energy-Saving in Electric Power

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