Animal fats biodiesel were manufactured and tested for its performance in the tractor engine and fuel adoptability in the field works. Four different fuels, three different content of biodiesel （BD20, BD50 and BD100...Animal fats biodiesel were manufactured and tested for its performance in the tractor engine and fuel adoptability in the field works. Four different fuels, three different content of biodiesel （BD20, BD50 and BD100） and light oil, were prepared and tested in the four strokes diesel engine. Power output, fuel consumption rate and exhaust gases of the four fuels in the diesel engine were compared and discussed. Power output of light oil engine was the greatest showing 5.3% difference between light oil and BDI00. But, almost no power difference between light oil engine and BD20 engine, light oil engine produced 0.37% more power than BD20 engine superior to better power than BD20 engine. Less exhaust gases of CO2, CO, NOx and total hydrocarbon （THC） were produced from animal fats biodiesel than light oil, which confirmed that biodiesel is environmental friendly fuel. For fuel adoptability in the tractor, biodiesel engine tractor showed its fuel competitiveness comparing with light oil for tractor works in the paddy field.展开更多
In the present article we characterized the emissions at the exhaust of a Common Rail （CR） diesel engine, representative of lightduty class, equipped with a catalyzed diesel particulate filter （CDPF） in controlled...In the present article we characterized the emissions at the exhaust of a Common Rail （CR） diesel engine, representative of lightduty class, equipped with a catalyzed diesel particulate filter （CDPF） in controlled environment. The downstream exhausts were directly analyzed （for PM, CO, CO/, Oz, HCs, NOx） by infrared and electrochemical sensors, and SEM-EDS microscope; heavy metals were chemically analyzed using mosses and lichens in bags, and glass-fibre filters all exposed at the engine exhausts. The highest particle emission value was in the 7-54 nm size range; the peak concentration rose until one order of magnitude for the highest load and speed. Particle composition was mainly carbonaceous, associated to noticeable amounts of Fe and silica fibres. Moreover, the content of Cu, Fe, Na, Ni and Zn in both moss and lichen, and of A1 and Cr in moss, was significantly increased. Glass-fibre filters were significantly enriched in A1, B, Ba, Cu, Fe, Na, and Zn. The role of diesel engines as source of carbonaceous nanoparticles has been confirmed, while further investigations in controlled environment are needed to test the catalytic muffler as a possible source of silica fibres considered very hazardous for human health.展开更多
为解决增压中冷车用柴油机瞬态工况排气烟度恶化问题,建立了基于实时数据采集的高压射流辅助能量供给(H igh Pressure A ir Spray Assistant Power Supp ly,HPAS)试验系统,研究了不同HPAS控制策略对发动机瞬态性能的影响规律。试验结果...为解决增压中冷车用柴油机瞬态工况排气烟度恶化问题,建立了基于实时数据采集的高压射流辅助能量供给(H igh Pressure A ir Spray Assistant Power Supp ly,HPAS)试验系统,研究了不同HPAS控制策略对发动机瞬态性能的影响规律。试验结果表明采用工况瞬变前2 s开始补气、油门稳定后即停止补气的预补气策略时HPAS对瞬态性能改善并不明显;采用油门增加即开始补气、回油门时停止补气的全程补气策略和油门增加到一半时开始补气、回油门时停止补气的中间补气两种策略对瞬态性能改善明显且幅值相近。考虑到实车应用的方便性确定了全程补气作为最终控制策略。展开更多
文摘Animal fats biodiesel were manufactured and tested for its performance in the tractor engine and fuel adoptability in the field works. Four different fuels, three different content of biodiesel （BD20, BD50 and BD100） and light oil, were prepared and tested in the four strokes diesel engine. Power output, fuel consumption rate and exhaust gases of the four fuels in the diesel engine were compared and discussed. Power output of light oil engine was the greatest showing 5.3% difference between light oil and BDI00. But, almost no power difference between light oil engine and BD20 engine, light oil engine produced 0.37% more power than BD20 engine superior to better power than BD20 engine. Less exhaust gases of CO2, CO, NOx and total hydrocarbon （THC） were produced from animal fats biodiesel than light oil, which confirmed that biodiesel is environmental friendly fuel. For fuel adoptability in the tractor, biodiesel engine tractor showed its fuel competitiveness comparing with light oil for tractor works in the paddy field.
文摘In the present article we characterized the emissions at the exhaust of a Common Rail （CR） diesel engine, representative of lightduty class, equipped with a catalyzed diesel particulate filter （CDPF） in controlled environment. The downstream exhausts were directly analyzed （for PM, CO, CO/, Oz, HCs, NOx） by infrared and electrochemical sensors, and SEM-EDS microscope; heavy metals were chemically analyzed using mosses and lichens in bags, and glass-fibre filters all exposed at the engine exhausts. The highest particle emission value was in the 7-54 nm size range; the peak concentration rose until one order of magnitude for the highest load and speed. Particle composition was mainly carbonaceous, associated to noticeable amounts of Fe and silica fibres. Moreover, the content of Cu, Fe, Na, Ni and Zn in both moss and lichen, and of A1 and Cr in moss, was significantly increased. Glass-fibre filters were significantly enriched in A1, B, Ba, Cu, Fe, Na, and Zn. The role of diesel engines as source of carbonaceous nanoparticles has been confirmed, while further investigations in controlled environment are needed to test the catalytic muffler as a possible source of silica fibres considered very hazardous for human health.
文摘为解决增压中冷车用柴油机瞬态工况排气烟度恶化问题,建立了基于实时数据采集的高压射流辅助能量供给(H igh Pressure A ir Spray Assistant Power Supp ly,HPAS)试验系统,研究了不同HPAS控制策略对发动机瞬态性能的影响规律。试验结果表明采用工况瞬变前2 s开始补气、油门稳定后即停止补气的预补气策略时HPAS对瞬态性能改善并不明显;采用油门增加即开始补气、回油门时停止补气的全程补气策略和油门增加到一半时开始补气、回油门时停止补气的中间补气两种策略对瞬态性能改善明显且幅值相近。考虑到实车应用的方便性确定了全程补气作为最终控制策略。
