HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Conference papers

CNG direct injection spark-ignition engine with high turbulence and high compression ratio: numerical and experimental investigations

Abstract : This study carried on within the H2020 GasOn project scope of work showed the interest to improve the turbulence of a CNG direct injection spark ignited engine with high compression by a dedicated cylinder head design. The in-cylinder air motion was optimally configured through 3D-CFD simulation in order to cope with the high performance targets (~240 N.m/L at 1500 rpm, ~80kW/L at 4500 rpm) within the cylinder pressure limit of 160 bar (Pcylmax+2s = 180 bar). To sustain such level of pressure a Diesel engine basis was used. The compression ratio was set to 13.4:1 in line with the knock resistance of the natural gas. This newly design engine was compared to a reference engine developed in a previous study. The flow test bench measurements confirmed the high tumble level of the optimized cylinder head. This new cylinder head was next tested on a single cylinder engine equipped with high mass flow rate gas injector prototype developed by Continental. The results, integrating the boundary conditions of the air path system including LP-EGR, validated the good effect of faster combustion revealed by the lower fuel consumption and the high tolerance to EGR dilution in stoichiometric conditions. Consequently, the results showed a significant improvement compared to the previous engine and a performance attaining Diesel-like break thermal engine efficiencies (~41%).
Complete list of metadata

Cited literature [9 references]  Display  Hide  Download

https://hal-ifp.archives-ouvertes.fr/hal-02194896
Contributor : Loic Rouleau Connect in order to contact the contributor
Submitted on : Friday, July 26, 2019 - 10:27:40 AM
Last modification on : Saturday, July 27, 2019 - 1:12:26 AM

File

4.1 CNG Direct-Injection Spark...
Files produced by the author(s)

Identifiers

  • HAL Id : hal-02194896, version 1

Collections

IFP

Citation

Loic Rouleau, David Serrano, Bertrand Lecointe, Frédéric Ravet, Gilles Coma, et al.. CNG direct injection spark-ignition engine with high turbulence and high compression ratio: numerical and experimental investigations. 12th Conference of Gaseous-Fuel Powered Vehicles, FKFS, Oct 2017, Stuttgart, Germany. ⟨hal-02194896⟩

Share

Metrics

Record views

99

Files downloads

82