Assessment of air management strategies to improve the transient response of advanced gasoline engines operating under high EGR conditions

Galindo, José; Climent, Héctor; Morena, Joaquín De la; González-Domínguez, David; Guilain, Stéphane

doi:10.1016/j.energy.2022.125586

Cited by 7 publications

(3 citation statements)

References 32 publications

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“…The response time is 2.5 times faster when using the pressure-wave supercharger due to its high boosting ability under low engine speed. A faster response of the air injection method has also been confirmed in [111,112]. Their results show that the exhaust gas recirculation (EGR) increases the engine response time, and high-pressure gas assistance provides the fastest response compared with other methods, demonstrating the feasibility of this method.…”

Section: Air Path System Developmentmentioning

confidence: 87%

Transient Performance of Gas-Engine-Based Power System on Ships: An Overview of Modeling, Optimization, and Applications

Wu,

Li,

Chen

et al. 2023

JMSE

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Liquefied natural gas (LNG) is widely regarded as the midterm solution toward zero-carbon transportation at sea. However, further applications of gas engines are challenging due to their weak dynamic load performance. Therefore, the comprehension of and improvements in the dynamic performance of gas-engine-based power systems are necessary and urgent. A detailed review of research on mechanisms, modeling, and optimization is indispensable to summarize current studies and solutions. Developments in engine air-path systems and power system load control have been summarized and compared. Mechanism studies and modeling methods for engine dynamic performance were investigated and concluded considering the trade-off between precision and simulation cost. Beyond existing studies, this review provides insights into the challenges and potential pathways for future applications in decarbonization and energy diversification. For further utilization of clean fuels, like ammonia and hydrogen, the need for advanced air–fuel ratio control becomes apparent. These measures should be grounded in a deep understanding of current gas engines and the combustion characteristics of new fuels. Additionally, the inherent low inertia feature of electric power systems, and consequently the weak dynamic performance when adopting renewable energies, must be considered and studied to ensure system reliability and safety during transient conditions.

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Section: Air Path System Developmentmentioning

confidence: 87%

Transient Performance of Gas-Engine-Based Power System on Ships: An Overview of Modeling, Optimization, and Applications

Wu,

Li,

Chen

et al. 2023

JMSE

View full text Add to dashboard Cite

show abstract

“…To solve this problem, researchers have explored the control strategy of EGR systems during transient conditions. Galindo et al [20] discovered that without additional measures, EGR prolonged torque response time by over 2 s during transient processes. They improved response speed by installing a compressed air tank and an electric-assisted turbocharger.…”

Section: Introductionmentioning

confidence: 99%

Study on the Effects of Exhaust Gas Recirculation and Fuel Injection Strategy on Transient Process Performance of Diesel Engines

2023

Sustainability

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To meet increasingly stringent emission regulations, this study investigates the transient process of a heavy-duty diesel engine equipped with a two-stage turbocharger. The study focuses on analyzing the impact of the EGR system and fuel injection strategy during a transient process of a load increase (20% to 100% in 1 s) at a constant speed (1300 rpm). The research results showed that delaying the opening time of the high-pressure EGR valve from 0.1 s to 0.5 s reduces peak carbon soot emissions by 51.3%, with only a 3.13% increase in NOx emissions. By extending the high-pressure exhaust gas recirculation mixing length, the issue of an excessively high fuel–oxygen equivalence ratio caused by uneven exhaust gas mixing in individual cylinders can be avoided, resulting in a maximum reduction of 47.0% in peak soot emissions. Building on exhaust gas recirculation optimization, further modifications to the main and post-injection strategies led to a 28.1% reduction in soot emissions, a 4.73% decrease in peak NOx emissions, and a minor increase of 1.87% in the indicated fuel specific consumption compared to the single-injection strategy. The significant reduction in soot emissions will provide benefits for public health and environmental sustainability.

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“…Despite having high filtration efficiency for soot emissions, frequent regeneration of the Diesel Particulate Filter (DPF) can lead to a reduction in fuel economy [19]. Galindo J et al have shown that the torque response time with EGR is 2 s slower than without EGR, and the response time of the transient process is successfully reduced by using a pressurized air tank (PAT) and installing an electric supercharger at the compressor outlet in series [20]. Research by Luján J. M. et.…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Exhaust Gas Recirculation Coupled Variable Geometry Turbocharger and Fuel Quantity Control on Transient Performance of Turbocharged Diesel Engine

2023

Energies

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With increasingly stringent emissions regulations, there are growing demands for the transient performance of diesel engines. This study conducted a transient bench test on a two-stage turbocharged heavy-duty diesel engine to optimize its performance during a load increase (20% to 100% in 1 s) at a constant speed (1200 RPM) transient process. The results showed that the transient control scheme using the low-pressure EGR system resulted in a 42.1% reduction in the peak value of soot emission, a 24.8% decrease in the peak value of NOx emission, a 9.14% decrease in ISFC and a 30.6% increase in maximum IMEP achieved in 1 s, compared to the steady-state optimization control scheme without EGR. Transient control scheme using the high-pressure EGR system resulted in a 24.4% reduction in the peak value of soot emission, a 31.8% reduction in the peak value of NOx emission, a 9.52% reduction in ISFC, and a 31.7% increase in maximum IMEP achieved in 1 s. The comparison of high and low-pressure EGR systems revealed that the low-pressure EGR system produced lower compromising emissions, while alterations in control parameters for the diesel engine with a high-pressure EGR system had a more significant impact on the transient process performance.

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Assessment of air management strategies to improve the transient response of advanced gasoline engines operating under high EGR conditions

Cited by 7 publications

References 32 publications

Transient Performance of Gas-Engine-Based Power System on Ships: An Overview of Modeling, Optimization, and Applications

Transient Performance of Gas-Engine-Based Power System on Ships: An Overview of Modeling, Optimization, and Applications

Study on the Effects of Exhaust Gas Recirculation and Fuel Injection Strategy on Transient Process Performance of Diesel Engines

Study on the Effect of Exhaust Gas Recirculation Coupled Variable Geometry Turbocharger and Fuel Quantity Control on Transient Performance of Turbocharged Diesel Engine

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