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首页> 外文会议>ASME Internal Combustion Engine Division fall technical conference 2010 >COMPARISON OF PROPANE AND METHANE PERFORMANCE AND EMISSIONS IN ATURBOCHARGED DIRECT INJECTION DUAL FUEL ENGINE
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COMPARISON OF PROPANE AND METHANE PERFORMANCE AND EMISSIONS IN ATURBOCHARGED DIRECT INJECTION DUAL FUEL ENGINE

机译：增压直喷双燃料发动机丙烷和甲烷性能与排放的比较

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摘要

With increasingly restrictive NO_x and PM emissions standards, the recent discovery of new natural gas reserves, and the possibility of producing propane efficiently from biomass sources, dual fueling strategies have become more attractive. This paper presents experimental results from dual-fueling a four-cylinder turbocharged DI diesel engine with propane or methane (a natural gas surrogate) as the primary fuel and diesel as the ignition source. Experiments were performed with the stock ECU at a constant speed of 1800 rev/min, and a wide range of BMEPs (2.7 to 11.6 bar) and percent energy substitutions (PES) of C_3H_8 and CH_4. Brake thermal efficiencies (BTE) and emissions (NOX, smoke, THC, CO, and CO_2) were measured. Maximum PES levels of about 80-95 percent with CH_4 and 40-92 percent with C_3H_8 were achieved. Maximum PES was limited by poor combustion efficiencies and engine misfire at low loads for both C_3H_8 and CH_4, and the onset of knock above 9 bar BMEP for C_3H_8. While dual fueling BTEs were lower than straight diesel BTEs at low loads, they approached diesel BTE values at high loads. With dual fueling, NO_x and smoke reductions (from diesel values) were as high as 66-68 percent and 97 percent, respectively, but CO and THC emissions were significantly higher with increasing PES at all engine loads.
机译：随着日益严格的NO_x和PM排放标准，最近发现的新天然气储备以及利用生物质资源有效生产丙烷的可能性，双重燃料战略变得越来越有吸引力。本文介绍了以丙烷或甲烷（天然气替代物）为主要燃料，柴油为点火源的双缸四缸涡轮增压直喷式柴油发动机的实验结果。使用ECU以1800 rpm / min的恒定速度进行了实验，并采用了多种BMEP（2.7至11.6 bar）以及C_3H_8和CH_4的百分比能量替代率（PES）。测量了制动器的热效率（BTE）和排放（NOX，烟气，THC，CO和CO_2）。 CH_4的最大PES水平约为80-95％，C_3H_8的最大PES水平为40-92％。最大的PES受C_3H_8和CH_4在低负载下燃烧效率差和发动机失火以及C_3H_8爆震超过9 bar BMEP的限制。虽然在低负荷下双燃料BTE低于纯柴油BTE，但在高负荷下它们接近柴油BTE值。使用双燃料时，NO_x和烟气减少量（根据柴油值计算）分别高达66-68％和97％，但是在所有发动机负载下，随着PES的增加，CO和THC排放量显着增加。

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