Analysis and Control of a Torque Blended Hybrid Electric Powertrain with a Multi-Mode LTC-SI Engine

Solouk, Ali; Shakiba-herfeh, Mohammad; Shahbakhti, Mahdi

doi:10.4271/2017-01-1153

Cited by 17 publications

(17 citation statements)

References 21 publications

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“…The parallel hybrid electric vehicle has been applied in various research [17,18], and in this paper, a novel parallel HEV powertrain architecture [39] is proposed, as is shown in Figure 11a. Figure 11b shows that the powertrain gear ratio i g consists of engine gear ratio i e and motor gear ratio i m , and can be calculated as i g = i e • i m : (1) The engine torque is transmitted through the synchronizer 10 located in the engine output shaft.…”

Section: Working Modes and Gear Shift Process Of The Proposed Powertrainmentioning

confidence: 99%

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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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Section: Working Modes and Gear Shift Process Of The Proposed Powertrainmentioning

confidence: 99%

“…Similarly, for a mild HEV, a multimode engine (SI/HCCI) was also applied by Nuesch, S. et al [16]. In addition, the HCCI/RCCI/SI engines were integrated with parallel hybrid electric configurations in [17,18] to select the optimal electrification level.…”

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 P0 and P1 architectures become mild hybrid when implementing higher voltage battery (36, 48 V, or more) and electric machine. [10][11][12][13][14][15][16][17][18] The electric machines in the P0 and P1 architectures are on the engine side without the possibility of mechanical disconnection between engine and the electric machine. Engine friction loss makes the motor power assist and regenerative braking not efficient.…”

Section: Introductionmentioning

confidence: 99%

“…Also, the P2, P3, and P4 architectures enable the pure electric launch/driving and much energy recapture. 3,7 The P0 architecture is also known as Belt-Integrated-Starter-Generator (B-ISG) or Belt-Alternator-Starter (BAS) [10][11][12][13][14] has an ISG mounted in the front of engine through accessory drive belt. The ISG is an electric machine with the combined functions of motoring (starter) and generating (generator or alternator).…”

Section: Introductionmentioning

confidence: 99%

Fuel economy improvement and emission reduction of 48 V mild hybrid electric vehicles with P0, P1, and P2 architectures with lithium battery cell experimental data

Liu

Liao

Lai

2021

Advances in Mechanical Engineering

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This paper intends to provide design selections of hybrid powertrain architectures in 48 V mild hybrid electric vehicles. Based on the location of the electric machine in the driveline, the hybrid powertrain architectures can be categorized into five groups, P0, P1, P2, P3, and P4. This paper uses simulation software to investigate the fuel economy improvements and emission reduction of 48 V mild hybrid electric vehicles with P0, P1, and P2 architectures. A baseline conventional and a 12 V start/stop vehicle models based on the production vehicle are built for comparison. The 48 V battery pack model is based on experimental data including open-circuit voltage and internal resistance of a 20 Ah lithium polymer battery cell. Four standard driving cycles are used to assess the fuel economy and emissions of the vehicle models. With features of engine idle elimination, electric power assist, and regenerative braking, the 48 V P0 and P1 respectively gains average 13.5% and 15.5% simulated fuel economy compared to baseline vehicle. The 48 V P2 enables feature of electric launch/driving and improves the fuel economy by average 18.5% better than baseline vehicle. The 48 V mild hybrid system seems to be one of the promising techniques to meet future fuel economy standards and emission regulations.

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“…This hybrid technology incorporates a small electric motor to assist the ICE in start-stop, idle and high load conditions. Also, this small electric motor can operate as electrical generator and convert part of the braking energy into electric energy [7]. In addition, it does not need a high power energy storage due to the small power rating of the electric motor.…”

Section: Introductionmentioning

confidence: 99%

Optimization of the parallel and mild hybrid vehicle platforms operating under conventional and advanced combustion modes

Benajes

García

Monsalve‐Serrano

et al. 2019

Energy Conversion and Management

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The stringent regulations, increased global temperature and customer demand for high fuel economy have led to rapid developments of different alternative propulsion solutions in the last decade, with special attention to the electrified vehicles. The combination of electric machines with conventional powertrains allows to diversify the powertrain architectures. In addition, alternative combustion modes as reactivity controlled compression ignition (RCCI) have been shown to provide simultaneous ultralow NOx and soot emissions with similar or better thermal efficiency than conventional diesel combustion (CDC). Therefore, the combination of both technologies creates a promising horizon to be implemented in commercial vehicles of the near future. In this work, experimental and numerical simulations were combined to study the potential of the parallel full hybrid electric vehicle (P2-FHEV) and mild hybrid vehicle (MHEV) to obtain lower fuel consumption and NOx emissions than a conventional powertrain in the Worldwide Harmonized Light Vehicles Cycle (WLTC). The hybrid vehicles are simulated with both CDC and diesel-gasoline RCCI combustion engines as power source. Each powertrain was optimized in terms of components (battery, electric motors...) capacity, internal combustion engine operative points, energy management strategy and gear ratios. The results show a significant fuel consumption reduction as the complexity of the hybrid system increases. The parallel architecture, which represents the most complex hybrid system tested in this work, allows obtaining a fuel consumption reduction of around 20% as compared to CDC. The dual-mode CDC-RCCI concept showed improvements in NOx and soot emissions with comparable values in terms of energy consumption and CO2 emissions than CDC. Additionally, the mild hybrid technology with the functionality of start-stop, torque assist and regenerative braking showed an acceptable balance between complexity and fuel consumption gain.

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Analysis and Control of a Torque Blended Hybrid Electric Powertrain with a Multi-Mode LTC-SI Engine

Cited by 17 publications

References 21 publications

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

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

Fuel economy improvement and emission reduction of 48 V mild hybrid electric vehicles with P0, P1, and P2 architectures with lithium battery cell experimental data

Optimization of the parallel and mild hybrid vehicle platforms operating under conventional and advanced combustion modes

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