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甲醇/汽油混合燃料在汽油机上的应用性能研究 总被引:2,自引:0,他引:2
研究了甲醇/汽油混合燃料在动力性、经济性、排放性等方面的规律.对汽油车用6102发动机进行了甲醇燃料排气污染物测试台架实验,并与汽油燃料的污染物排放进行了比较,CO、CO2、NOx、HC等常规排放污染物的排放量大大减少. 相似文献
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甲醇作为一种代用燃料,可以与汽油混合使用,人们对使用低比例甲醇燃料发动机的性能十分关注。文章对加入M15甲醇汽油和加入93#汽油的发动机分别经过300 h台架强化试验,测试发动机功率、扭矩及油耗率。强化后,2种燃料的动力性能相近,但M15甲醇汽油的燃料消耗量比汽油高出9%。在汽油发动机中,直接使用M15甲醇汽油,除发动机燃料经济性变差外其他基本无变化。 相似文献
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甲醇作为一种代用燃料,可以与汽油混合使用,人们对使用低比例甲醇燃料发动机的性能十分关注。文章对加入M15甲醇汽油和加入93#汽油的发动机分别经过300 h台架强化试验,测试发动机功率、扭矩及油耗率。强化后,2种燃料的动力性能相近,但M15甲醇汽油的燃料消耗量比汽油高出9%。在汽油发动机中,直接使用M15甲醇汽油,除发动机燃料经济性变差外其他基本无变化。 相似文献
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《车用发动机》2020,(3)
为了研究不同比例甲醇和汽油混合燃料对发动机燃烧排放性能的影响,对1台1.4 L缸内直喷发动机加装了进气道喷射系统,改造为甲醇进气道喷射(MPI)+汽油缸内直喷(GDI)发动机,运用CFD技术建立该发动机模型,对不同甲醇热值替代比下的缸内混合气形成、燃烧和排放特性进行了研究。研究结果表明:在混合气形成方面,随着甲醇替代比的提高,缸内温度逐渐下降(但在点火时刻缸内温度下降趋势减缓),未蒸发燃料质量迅速增加。在缸内燃烧方面,提高甲醇替代比能够有效地加速缸内燃烧过程,提高缸内峰值缸压和峰值放热率,缩短滞燃期和燃烧持续期,使燃烧重心提前,但较高甲醇替代比下加速燃烧过程趋势减缓。在排放物生成方面,随着甲醇替代比的提高,NO_x排放逐渐增加,CO总排放量降低,但峰值CO量却呈现先增后减趋势,THC排放逐渐增加,其中大部分为未燃甲醇。 相似文献
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低比例甲醇汽油发动机排放建模与预测 总被引:1,自引:0,他引:1
在1台进气道多点电喷EQ491i汽油机上,采用AVL傅里叶变换红外光谱多组分分析仪SESAM-FTIR测量了燃用低比例甲醇汽油的排放成分。使用发动机循环模拟软件Boost耦合化学动力学软件Chemkin,建立了甲醇汽油发动机循环计算模型并用试验结果进行标定,模拟了甲醇汽油发动机中的常规排放NOx和非常规排放甲醛的生成情况。模拟结果表明,在相同工况条件下,随着甲醇比例的增大,甲醛排放基本呈线性增长。发动机负荷对甲醛排放影响不大,NOx排放主要受空燃比和燃烧温度影响。 相似文献
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为了进一步降低商用车的燃油消耗和CO2排放,开展基于发动机工况需求的电控集成优化控制研究。以某直列4缸电控共轨柴油机为研究对象,以发动机水温为反馈,对发动机水泵、节温器等电控冷却系统零部件进行综合调节,实现快速暖机升温以及正常行驶中发动机水温恒定在最佳温度,并通过优化VGT,改善燃烧过程。试验结果表明,采用智能控制系统可将冷却水温控制在各工况所对应的最优冷却水温附近,基于发动机工况需求的电控集成优化控制可以降低柴油机油耗3.51%,充分验证了智能控制方案的可行性和有效性。 相似文献
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对几种不同的汽油机进气管内油膜研究方法研究了评述,介绍了自行设计的油膜收集器的结构及工作原理,采用油膜收集法,使用所设计的油膜收集器,在一台装有EQH102型化油器的EQ6100-I型汽油机进行了试验研究,并对试验结果进行了分析。 相似文献
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可调涡轮增压器与柴油机匹配试验研究 总被引:2,自引:0,他引:2
对J6110Z型柴油机匹配套式移动结构可调涡轮增压器进行了台架试验研究,试验中,在调节涡轮截面时没有进行相应的油量调节,而重点对柴油机各种工况下VGT-70型增压器的性能进行了研究分析。 相似文献
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A. J. Torregrosa A. Broatch P. Olmeda C. Romero 《International Journal of Automotive Technology》2008,9(4):447-458
One of the major goals of engine designers is the reduction of fuel consumption and pollutant emissions while keeping or even
improving engine performance. In recent years, different technical issues have been investigated and incorporated into internal
combustion engines in order to fulfill these requirements. Most are related to the combustion process since it is responsible
for both fuel consumption and pollutant emissions. Additionally, the most critical operating points for an engine are both
the starting and the warming up periods (the time the engine takes to reach its nominal temperature, generally between 80°C
and 90°C), since at these points fuel consumption and pollutant emissions are larger than at any other points. Thus, reducing
the warm-up period can be crucial to fulfill new demands and regulations. This period depends strongly on the engine cooling
system and the different strategies used to control and regulate coolant flow and temperature. In the present work, the influences
of different engine cooling system configurations on the warm-up period of a Diesel engine are studied. The first part of
the work focuses on the modeling of a baseline engine cooling system and the tests performed to adjust and validate the model.
Once the model was validated, different modifications of the engine coolant system were simulated. From the modelled results,
the most favourable condition was selected in order to check on the test bench the reduction achieved in engine warm-up time
and to quantify the benefits obtained in terms of engine fuel consumption and pollutant emissions under the New European Driving
Cycle (NEDC). The results show that one of the selected configurations reduced the warm-up period by approximately 159 s when
compared with the baseline configuration. As a consequence, important reductions in fuel consumption and pollutant emissions
(HC and CO) were obtained.
On doctoral leave from Universidad Technológica de Pereira (Colombia) 相似文献
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Jae Woo Chung Nam Ho Kim Deok Jin Kim Seong Sik Jang 《International Journal of Automotive Technology》2018,19(2):209-220
Recently, to improve vehicle fuel economy, as well as the performance of internal combustion engines, optimized system matching between a vehicle’s drivetrain and engine has become a very important technical issue. For this reason, the need for simulation research on engine and vehicle performance improvement has increased. But in general, since both engine simulation and vehicle simulation require initial engine calibration map input, a simple engine calibration method is required for the efficient configuration of various virtual engine calibration map setups. On this background, in this study, an example of waste gate turbocharger (WGT) cooled — exhaust gas recirculation (EGR) Diesel engine calibration using a test-based mean value engine model is presented as a suitable engine calibration map setting method. Also, the feasibility of an engine calibration model is confirmed through various engine tests. Using the simple model presented here, it is possible for diverse engine operating conditions and engine performance maps to be acquired. 相似文献
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