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电控PPVI燃油喷射系统柴油机的单缸性能初步试验 被引量:6
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作者 左承基 欧阳明高 +6 位作者 杜传进 李建秋 刘峥 张华 沈捷 卓松芳 邱瑞兴 《车用发动机》 北大核心 1998年第2期32-35,41,共5页
简述了电控泵—管—阀—嘴(PPVI)燃油喷射系统柴油机单缸性能试验的方法。进行了单缸性能试验和燃烧过程的分析。结果表明,喷油器端的油管压力波形理想,下降迅速。缸内燃烧前期比较柔和而中后期十分迅速,最大压力升高率较低,燃烧... 简述了电控泵—管—阀—嘴(PPVI)燃油喷射系统柴油机单缸性能试验的方法。进行了单缸性能试验和燃烧过程的分析。结果表明,喷油器端的油管压力波形理想,下降迅速。缸内燃烧前期比较柔和而中后期十分迅速,最大压力升高率较低,燃烧持续期较短。 展开更多
关键词 电子控制 燃油喷射系统 柴油机 试验 单缸性能
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Performance Characteristics of Single Cylinder Diesel Engine under Different Operating Conditions
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作者 H.A. Mohamed M.S. Ahmed 《Journal of Environmental Science and Engineering》 2011年第7期850-856,共7页
Recently, it is predicted that the fossil fuels will be sufficient for a few decades at the present extraction rates. So, the performance studies of the internal combustion engines play an important role to achieve th... Recently, it is predicted that the fossil fuels will be sufficient for a few decades at the present extraction rates. So, the performance studies of the internal combustion engines play an important role to achieve the best operating point at different weather temperatures. In the present study, the effects of the inlet air temperatures on the engine performance characteristics were studied at different cooling loads. Several experiments were carried out on a single cylinder diesel engine (SCDI). The performance characteristics of SCDI included: brake power, specific fuel consumption, brake thermal efficiency and exhaust emissions (carbon dioxide, CO2, carbon monoxide CO, and hydrocarbon HC). The findings show that the inlet air temperature and cooling conditions have appreciable effect on the performance characteristics of the SCDI especially at low cooling rate. It can be concluded that the high cooling rate leads to the enhancement in the brake thermal efficiency, the b.s.f.c, and the emitted COz, CO, and HC. On the other hand the high cooling rate leads to the decrease in the volumetric efficiency. So, a compromising between the inlet air temperature and the cooling rate should be recommended for the engine best performance. 展开更多
关键词 Diesel engine inlet conditions performance test single cylinder.
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Experimental Investigation on Diesel Engine Performance Using Nano Air-Bubbles Mixed into Gas Oil
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作者 Yasuhito Nakatake Takashi Watanabe Toshihiko Eguchi 《Journal of Energy and Power Engineering》 2013年第5期827-833,共7页
The authors studied diesel combustion improvement with a reformed fuel that mixed nano air-bubbles by using an EMNB (ejector-type micro-nano bubbler). The EMNB performs adequately and is smaller (20 mm diameter, 34... The authors studied diesel combustion improvement with a reformed fuel that mixed nano air-bubbles by using an EMNB (ejector-type micro-nano bubbler). The EMNB performs adequately and is smaller (20 mm diameter, 34 mm length) than other micro-nano bubblers. It is quite possible to install it in an actual engine. An experiment was performed using a single cylinder engine with a dish or square shaped combustion chamber cavity, and in order to compare the engine speed change, we also used a four cylinder engine with a turbo-charger. The results showed that an improvement in specific fuel consumption, a decrease in the density of the exhaust smoke and an improvement in charging efficiency etc. were achieved by mixing nano bubbles into gas oil under most conditions. It is confirmed that combustion was promoted and improved by a physical and chemical action through mixing the nano bubbles into gas oil. 展开更多
关键词 Diesel engine liquid fuel nano bubble specific fuel consumption environmental pollutant.
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Effect of a semi electro-mechanical engine valve on performance and emissions in a single cylinder spark ignited engine 被引量:1
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作者 Bülent ZDALYAN Oguzhan DOGAN 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2010年第2期106-114,共9页
In this study, an electro-mechanical valve (EMV) system for the intake valve ofa fottr stroke, single cylinder, overhead valve and spark ignition (SI) engine was designed and constructed. An engine with the EMV sy... In this study, an electro-mechanical valve (EMV) system for the intake valve ofa fottr stroke, single cylinder, overhead valve and spark ignition (SI) engine was designed and constructed. An engine with the EMV system and a standard engine were tested to observe the effects of the EMV on engine performance and emissions at different speeds under full load. The EMV engine showed improved engine power, engine torque and break specific fuel consumption (BSFC). A 66% decrease in CO emissions was also obtained with the EMV system, but hydrocarbons (HC) and NOx emissions increased by 12% and 13% respectively. 展开更多
关键词 Semi electro-mechanic Camless engine Electro-mechanic engine valve Engine performance EMISSIONS
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