E25 stratified torch ignition engine performance, CO2 emission and combustion analysis

被引:19
作者
Rodrigues Filho, Fernando Antonio [2 ]
Araujo Moreira, Thiago Augusto [3 ]
Valle, Ramon Molina [1 ]
Coelho Baeta, Jose Guilherme [1 ]
Pontoppidan, Michael [4 ]
Teixeira, Alysson Fernandes [2 ]
机构
[1] Univ Fed Minas Gerais, 6627 Ave Antonio Carlos, BR-31270901 Belo Horizonte, MG, Brazil
[2] Ctr Fed Educ Tecnol Minas Gerais, 7675 Ave Amazonas, BR-30510000 Belo Horizonte, MG, Brazil
[3] Inst Fed Minas Gerais, 3007 Ave Michael Pereira de Souza, BR-36415000 Congonhas, MG, Brazil
[4] Numidis Sarl, 19 Ave Epinay, F-92700 Colombes, France
关键词
Torch ignition; Lean combustion; Specific fuel consumption; CO2; emission; Combustion analysis; Internal combustion engine; GASOLINE DIRECT-INJECTION; DIESEL-ENGINE; EXHAUST EMISSIONS; BIODIESEL BLENDS; PORT INJECTION; AIR-POLLUTION; BIOFUEL; FUEL; ECONOMY; SYSTEM;
D O I
10.1016/j.enconman.2016.02.052
中图分类号
O414.1 [热力学];
学科分类号
摘要
Vehicular emissions significantly increase atmospheric air pollution and the greenhouse effect. This fact associated with the fast growth of the global motor vehicle fleet demands technological solutions from the scientific community in order to achieve a decrease in fuel consumption and CO2 emission, especially of fossil fuels to comply with future legislation. To meet this goal, a prototype stratified torch ignition engine was designed from a commercial baseline engine. In this system, the combustion starts in a pre-combustion chamber where the pressure increase pushes the combustion jet flames through a calibrated nozzle to be precisely targeted into the main chamber. These combustion jet flames are endowed with high thermal and kinetic energy being able to promote a stable lean combustion process. The high kinetic and thermal energy of the combustion jet flame results from the load stratification. This is carried out through direct fuel injection in the pre-combustion chamber by means of a prototype gasoline direct injector (GDI) developed for low fuel flow rate. During the compression stroke, lean mixture coming from the main chamber is forced into the pre-combustion chamber and, a few degrees before the spark timing, fuel is injected into the pre-combustion chamber aiming at forming a slightly rich mixture cloud around the spark plug which is suitable for the ignition and kernel development. The performance of the torch ignition engine running with E25 is presented for different mixture stratification levels, engine speed and load. The performance data such as combustion phasing, specific fuel consumption, thermal efficiency and the specific emissions of CO2 are carefully analyzed and discussed in this paper. The results obtained in this work show a significant increase in the torch ignition engine's performance in comparison with the baseline engine which was used as a workhorse for the prototype engine construction. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:299 / 307
页数:9
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