One Dimensional Modeling and Experimental Validation of Single Cylinder Pneumatic Combustion Hybrid Engine

Brejaud, Pascal; Higelin, Pascal; Charlet, Alain; Colin, Guillaume; Chamaillard, Yann

doi:10.4271/2011-24-0074

Cited by 6 publications

(4 citation statements)

References 16 publications

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“…Trajkovic et al [25][26][27] conducted simulations and experiments to investigate the dynamic behavior of the pneumatic hybrid system. Brejaud et al [28][29][30] improved the Higelin design by adding an intermediate tank between the air tank and the charging valve. This resulted in a 46% and 26% improvement in fuel economy under hot-start conditions, tested under the world-harmonized light-duty vehicle test cycle (WLTC) and the new European driving cycle (NEDC) working conditions, respectively.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Performance of the Scroll Expander under Various Driving Cycles

Yang,

Xu,

Zhong

et al. 2024

Energies

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Energy storage is considered a crucial unit in utilizing renewable energy sources, and compressed air energy storage (CAES) provides a cost-effective solution. It offers the benefits of zero pollution, a long lifespan, low maintenance costs, and minimal environmental impact. In order to increase the possibilities of compressed air energy storage for vehicle power, the performance of the expander needs to be studied. First, a CAES unit test bench is established. Then, the volumetric flow rate, rotational speed, torque, and output power are examined. Additionally, the isentropic exhaust temperature, pressure, and gas consumption rate of the scroll expander are analyzed. Finally, analyzing the economic feasibility of the CAES unit entails running the unit under varied driving conditions. Results reveal that the pressure of the input expander is high, which will lead to greater torque, greater peak power, and a greater temperature drop, but the gas in the air tank will also run out quickly. The peak power of the scroll expander does not occur at the maximum volume flow rate, rotation speed, and torque. The basic investment of the CAES unit mainly depends on the peak output power.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Performance of the Scroll Expander under Various Driving Cycles

Yang,

Xu,

Zhong

et al. 2024

Energies

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“…journal.ump.edu.my/ijame Electric Vehicle (HEV) with 45 kW power output capacity. Through MATLAB-Simulink modelling, the efficiency was found to perform around 10% better than diesel electrical generators at 10-20 kW load and 5% at 20-40 kW load [9].…”

Section: Introductionmentioning

confidence: 99%

Performance Characteristics of a Small Poppet Valve Crankshaft Engine in Free-Piston Engine Mode

Hanipah

Rosli

2021

IJAME

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The free-piston engine generator (FPEG) provides a novel method for electrical power generation in the range extender and hybrid electric vehicle application. In this paper, one-dimensional (1D) numerical simulations of a two-stroke poppet valve in crankshaft engine (CSE) and free-piston engine (FPE) modes are presented to illuminate the potential performance gain of a two-stroke poppet valve engine for free-piston engine generator application. The 1D numerical simulation for crankshaft and free-piston engine models focuses on the two-stroke engine performance response. Both models were subjected to variations of ignition and valve timings. The impact of lambda on engine performance was obtained. Finally, a single speed of 3000 rpm was chosen for detail performance behaviour of the free-piston engine model response. The results have shown that the CSE model has demonstrated traditional performance behaviour against ignition timing variation. In addition, FPE model performance is highly affected by both intake and exhaust valve timings as compared to the CSE model. Furthermore, CSE is superior to FPE across lambda variations for BSFC, brake thermal efficiency, brake power and bmep. These models have successfully portrayed realistic engine performance response as presented in the lambda variations simulation. When simulated at an intended operating speed of 50 Hz, the FPE model has shown poorer performance. The bmep and brake power of FPE model dropped by 3%, brake thermal efficiency dropped by 26%, and BSFC increased by 21%. This lower performance is attributed by 30% reduction in piston velocity suffers in FPE, which contributed to 13% reduction in peak cylinder pressure. Ignition delays promote better FPE performance which is able to match the CSE model. In conclusion, this paper has demonstrated the performance behaviour of a two-stroke free-piston engine model based on the baseline crankshaft engine model.

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“…In addition to those mentioned above, a few numerical studies were also reported on the fuel-saving effect of hybrid pneumatic engine in different applications. 27–35…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al [26] conducted the simulation study of a hybrid pneumatic engine under urban driving-cycle, showing that the fuel consumption of a light-duty vehicle equipped with a hybrid pneumatic engine can be reduced by 8%. In addition to those mentioned above, a few numerical studies were also reported on the fuel-saving effect of hybrid pneumatic engine in different 5 applications [27][28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Study of a hybrid pneumatic-combustion engine under steady-state and transient conditions for transport application

Fang

et al. 2019

International Journal of Engine Research

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In this study, a new form of hybrid pneumatic combustion engine based on compressed air injection boosting is proposed. The hybrid pneumatic combustion engine regenerates the wasted energy during engine brake to improve the engine performance achieving better fuel economy. The mathematic model of the hybrid pneumatic combustion engine including a supercharged engine and the compressed air tank has been established. The steady-state and transient performance of the engine are analysed. Results show that the air injection boosting system can effectively improve the steady-state performance. Under the speed of 1900 r/min and 100% load, the engine torque and power can be increased from 1039 N m, 206.9 kW to 1057 N m, 210 kW by adopting air injection boosting with the injection pressure of 0.5 MPa. Effects of air injection parameters are also studied, showing that better performance can be achieved under higher air tank pressure and larger injection hole diameter. In addition, a transient analysis is completed under the speed of 1100 r/min. The result shows that when air injection boosting is used, the responding time of the engine to an instant load increase can be potentially reduced from 5.5 to 3.5 s under the injection pressure and duration of 0.5 MPa and 3 s. Meanwhile, the tank pressure has limited influence on the transient performance of the engine.

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One Dimensional Modeling and Experimental Validation of Single Cylinder Pneumatic Combustion Hybrid Engine

Cited by 6 publications

References 16 publications

Experimental Investigation on the Performance of the Scroll Expander under Various Driving Cycles

Experimental Investigation on the Performance of the Scroll Expander under Various Driving Cycles

Performance Characteristics of a Small Poppet Valve Crankshaft Engine in Free-Piston Engine Mode

Study of a hybrid pneumatic-combustion engine under steady-state and transient conditions for transport application

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