Fuel Economy Benefits of Integrating a Multi-Mode Low Temperature Combustion (LTC) Engine in a Series Extended Range Electric Powertrain

Solouk, Ali; Shakiba-herfeh, Mohammad; Kannan, Kaushik; Solmaz, Hamit; Dice, Paul; Bidarvatan, Mehran; Kondipati, Naga Nithin Teja; Shahbakhti, Mahdi

doi:10.4271/2016-01-2361

Cited by 26 publications

(22 citation statements)

References 17 publications

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“…Regarding the LTCs, their typical application is found in series architecture due to the simplicity of the implementation and working points of view. Previous numerical studies demonstrated that the operation using RCCI combustion can reduce up to 9% of the total fuel consumption compared to a hybrid spark ignition (SI) engine [39]. In addition, experimental investigations demonstrated that the SHV can reach normative values for emissions by implementing appropriate design changes [40].…”

Section: Introductionmentioning

confidence: 99%

Potential of RCCI Series Hybrid Vehicle Architecture to Meet the Future CO2 Targets with Low Engine-Out Emissions

et al. 2018

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Reactivity controlled compression ignition (RCCI) combustion has been shown to provide simultaneous ultra-low NOx and soot emissions with similar or better thermal efficiencies than conventional diesel combustion (CDC). Nonetheless, RCCI still has several challenges that restrict its operating range and limit its practical application. The dual-mode operation, which involves switching between different combustion modes, has been found as a promising alternative to operation in the whole engine map. However, the combustion mode switching requires difficult engine control, particularly during transient operation. The series hybrid vehicle (SHV) architecture allows the thermal engine to operate in a limited operating range by decoupling it from the drivetrain. Therefore, it could be an interesting alternative to the dual-mode concept. This work explores the potential of the RCCI series hybrid vehicle architecture to provide low engine-out emissions and CO2 by means of vehicle systems simulations. The results show the influence of the main parameters and control strategies of the SHV vehicle on its efficiency and emissions under different driving cycles. Finally, the optimal RCCI-SHV configuration is compared to CDC and dual-mode combustion strategies, confirming its potential as a future vehicle architecture for high efficiency and low emissions.

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Section: Introductionmentioning

confidence: 99%

Potential of RCCI Series Hybrid Vehicle Architecture to Meet the Future CO2 Targets with Low Engine-Out Emissions

et al. 2018

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“…In [14], a dual-fuel, reactivity controlled compression ignition (RCCI) engine was used in a series HEV to estimate the influence on fuel economy and emissions performance. Solouk, A. et al applied a HCCI/RCCI/SI multi-mode engine in a series extended range electric vehicle, and the results under city driving cycle showed that the multi-mode engine had a better fuel economy compared with the engines which had only one combustion mode [15]. Similarly, for a mild HEV, a multimode engine (SI/HCCI) was also applied by Nuesch, S. et al [16].…”

Section: Introductionmentioning

confidence: 99%

Architecture Optimization of Hybrid Electric Vehicles with Future High-Efficiency Engine

Hong¹,

Zhao²,

Lei³

et al. 2018

Energies

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The great development of engine technologies can help to improve the engine characteristics and performance: a better thermal efficiency and an extending fuel economy area, which will subsequently decrease the fuel consumption and thus influence the overall architecture of the vehicle. In this paper, an investigation is carried out to assess the influence of the high-efficiency engine on the transmission gear numbers. First, according to the relevant studies and the integration of the advanced engine technology, a future engine fuel consumption map is obtained, based on which, the preliminary simulations are applied to explore the best match between the transmission and the proposed future engine from the perspective of fuel consumption. The simulation results indicate that the transmission with four gears is the best option to match the future engine while maintaining good fuel economy and meeting the driving demands. Then, based on this conclusion, a new hybrid powertrain architecture, which includes four gears for the engine, is introduced and analyzed in detail, with the advantage of seamless gear shift due to the compensation torque of the motor. Finally, to further examine the fuel economy and gear shift quality of the proposed powertrain, the dynamic model is established and the simulation results demonstrate that the new powertrain architecture shows a good fuel consumption performance and the gear shift process can be achieved without power interruption.

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“…Moreover, in [39] we carried out the first study on integrating a multi-mode LTC engine with a SHEV architecture. The multi-mode LTC engine was able to switch between the HCCI, RCCI and conventional SI modes by incorporating a fuel penalty.…”

Section: Introductionmentioning

confidence: 99%

Energy Optimization and Fuel Economy Investigation of a Series Hybrid Electric Vehicle Integrated with Diesel/RCCI Engines

Solouk

Shahbakhti

2016

Energies

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Among different types of low temperature combustion (LTC) regimes, reactively controlled compression ignition (RCCI) has received a lot of attention as a promising advanced combustion engine technology with high indicated thermal efficiency and low nitrogen oxides (NO x ) and particulate matter (PM) emissions. In this study, an RCCI engine for the purpose of fuel economy investigation is incorporated in series hybrid electric vehicle (SHEV) architecture, which allows the engine to run completely in the narrow RCCI mode for common driving cycles. Three different types of energy management control (EMC) strategies are designed and implemented to achieve the best fuel economy. The EMC strategies encompass rule-based control (RBC), offline, and online optimal controllers, including dynamic programing (DP) and model predictive control (MPC), respectively. The simulation results show a 13.1% to 14.2% fuel economy saving by using an RCCI engine over a modern spark ignition (SI) engine in SHEV for different driving cycles. This fuel economy saving is reduced to 3% in comparison with a modern compression ignition (CI) engine, while NO x emissions are significantly lower. Simulation results show that the RCCI engine offers more fuel economy improvement in more aggressive driving cycles (e.g., US06), compared to less aggressive driving cycles (e.g., UDDS). In addition, the MPC results show that sub-optimal fuel economy is achieved by predicting the vehicle speed profile for a time horizon of 70 s.

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Fuel Economy Benefits of Integrating a Multi-Mode Low Temperature Combustion (LTC) Engine in a Series Extended Range Electric Powertrain

Cited by 26 publications

References 17 publications

Potential of RCCI Series Hybrid Vehicle Architecture to Meet the Future CO2 Targets with Low Engine-Out Emissions

Potential of RCCI Series Hybrid Vehicle Architecture to Meet the Future CO2 Targets with Low Engine-Out Emissions

Architecture Optimization of Hybrid Electric Vehicles with Future High-Efficiency Engine

Energy Optimization and Fuel Economy Investigation of a Series Hybrid Electric Vehicle Integrated with Diesel/RCCI Engines

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