Effect of synergistic engine technologies for 48 V mild hybrid electric vehicles

Oh, Hyondong; Lee, Jong-Hyeok; Woo, Soohyung; Park, Hanyong

doi:10.1016/j.enconman.2021.114515

Cited by 16 publications

(9 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The conventional vehicle employs a switchable water pump, while the MHEV employs an electric water pump to give the engine greater degrees of freedom in its operation. 12,18 Table 2 shows the specifications of these two engines.…”

Section: Engine Configurationmentioning

confidence: 99%

“…[15][16][17] 48 V MHEV has the ability to achieve fuel consumption benefit close to that of a full HEV through the test driving cycle, and only needs minor modifications on the existing powertrain system, so automobile manufacturers can realize agile and efficient development, avoiding dedicated platforms or architectures. 14,18 These advantages make the 48 V mild hybrid technology preferable in the current market place.…”

Section: Introductionmentioning

confidence: 99%

“…By combining the effect of ''Stop in Motion'' and optimized electricity management in the 48 V MHEV, the improvement of fuel efficiency in 48 V P0 MHEV was identified to be 5.5% compared with a conventional 12 V system. 18 Oh also stated that the application of electric supercharging and downspeeding leds to a 4.5% improvement in vehicle fuel efficiency. In this study, the 48 V MHEV electric energy during the WLTP cycle is balanced and the 48 V supercharger consumed about 25% electric energy, so the total fuel consumption benefit contributed by the 48 V P0 system should be above 5.5%.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The development of the fuel saving control strategy for 48 V P0 system: Design and experimental investigation

Shang,

Zhang,

Yin

et al. 2024

Advances in Mechanical Engineering

View full text Add to dashboard Cite

This paper presents a fuel consumption reduction control strategy for a newly-developed 48 V P0 mild hybrid electric vehicle and evaluates its fuel economy benefit experimentally. The strategy is designed with rule-based methods and utilizes various functions such as start-stop, torque boost, regeneration, load shift, BSG neutral mode and torque interventions with BSG. Fuel consumption comparison tests are performed in the WLTP cycle between the MHEV and the conventional vehicle. The authors evaluate the performance of specific key functions, analyze the energy flow of the 48 V battery, and calculate the fuel saving rate of the MHEV. The SOC of the 48 V battery is balanced in the WLTP cycle. The total energy charged to the 48 V battery is 378 Wh, of which 82% comes from the regeneration pattern. The total energy discharged from the 48 V battery is 355 Wh, of which 85% is consumed by the load shift pattern (BSG neutral state and Discharging state). The fuel consumption of the MHEV is reduced by 7.9% compared with the conventional vehicle in the WLTP cycle. The start-stop, BSG neutral, and torque interventions with BSG save fuel by 3.8%, 0.9%, and 0.5% respectively. The other hybrid functions save fuel by 2.7%.

show abstract

Section: Engine Configurationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The development of the fuel saving control strategy for 48 V P0 system: Design and experimental investigation

Shang,

Zhang,

Yin

et al. 2024

Advances in Mechanical Engineering

View full text Add to dashboard Cite

show abstract

“…The plug-in hybrid electric vehicle (PHEV) has the advantages of both BEVs and HEVs, which can effectively reduce exhaust emissions and provide a longer driving range [6,7], and are currently the most widely used in the field of public transportation. The mild hybrid electric vehicle (MHEV) uses a different low-voltage hybrid technology than the other two, and its configuration is simpler and lower cost [8,9]. The extended-range electric vehicle (EREV) only uses the motor to provide power for the vehicle, and the range extender directly charges the battery pack, so as to achieve the purpose of extending the driving mileage of the vehicle [10,11].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Energy Management Strategy for Fuel Cell Hybrid Electric Vehicles Based on Dynamic Programming

Huang

Jiang

et al. 2022

Energies

View full text Add to dashboard Cite

Fuel cell hybrid electric vehicles have attracted a large amount of attention in recent years owing to their advantages of zero emissions, high efficiency and low noise. To improve the fuel economy and system durability of vehicles, this paper proposes an energy management strategy optimization method for fuel cell hybrid electric vehicles based on dynamic programming. Rule-based and dynamic-programming-based strategies are developed based on building a fuel cell/battery hybrid system model. The rule-based strategy is improved with a power distribution scheme of dynamic programming strategy to improve the fuel economy of the vehicle. Furthermore, a limit on the rate of change of the output power of the fuel cell system is added to the rule-based strategy to avoid large load changes to improve the durability of the fuel cell. The simulation results show that the equivalent 100 km hydrogen consumption of the strategy based on the dynamic programming optimization rules is reduced by 6.46% compared with that before the improvement, and by limiting the rate of change of the output power of the fuel cell system, the times of large load changes are reduced. Therefore, the strategy based on the dynamic programming optimization rules effectively improves the fuel economy and system durability of vehicles.

show abstract

“…In particular, technologies such as the heavily downsizing engine strategy have lost benefits and have limited application due to changes in engine requirements and tighter exhaust emission regulation. In particular, the combinations with hybrid or mild hybrid are expected to be essential for future engines, the benefits of low-load efficiency technologies diminish, and it becomes less important to meet various development requirements for a wide range of engine operating conditions [6,9,14]. In contrast, achieving high thermal efficiency in the sweet spot becomes a more important engineering target for state-of-the-art engines, specially dedicated hybrid engines (DHEs).…”

Section: Introductionmentioning

confidence: 99%

Effect of Divided Exhaust Period in a High Efficiency TGDI Engine

Jung

Son

et al. 2021

Energies

Self Cite

View full text Add to dashboard Cite

The divided exhaust period (DEP) concept was applied to a high-efficiency gasoline engine and its impact on various engine performance aspects were investigated. To this end, key design parameters of DEP components were optimized through 1-D engine simulation. The designed DEP components were fabricated and experimental verification was performed through an engine dynamometer test. The developed DEP engine shows suitable performance for electrified vehicles, with a maximum thermal efficiency of 42.5% as well as a wide sweet spot area of efficiency over 40%. The improvement in thermal efficiency was mainly due to a reduction in pumping loss. Notably, the reduction in pumping loss was achieved under high exhaust gas recirculation (EGR) flow conditions, where further improvements in fuel consumption could be achieved through a synergistic combination of DEP implementation and high dilution combustion. Furthermore, a significantly improved catalyst light-off time, uncharacteristic in turbocharged engines, was confirmed through a simulated cold-start catalyst heating engine test.

show abstract

Effect of synergistic engine technologies for 48 V mild hybrid electric vehicles

Cited by 16 publications

References 33 publications

The development of the fuel saving control strategy for 48 V P0 system: Design and experimental investigation

The development of the fuel saving control strategy for 48 V P0 system: Design and experimental investigation

Optimization of Energy Management Strategy for Fuel Cell Hybrid Electric Vehicles Based on Dynamic Programming

Effect of Divided Exhaust Period in a High Efficiency TGDI Engine

Contact Info

Product

Resources

About