刘方杰,郑新国,谢继成,等.进气温度对发动机燃用M15甲醇汽油时性能的影响[J].内燃机工程,2025,46(6):95-101.
进气温度对发动机燃用M15甲醇汽油时性能的影响
Effects of Intake Temperatures on Performances of the Engine Fueled with M15 Methanol Gasoline
DOI：10.13949/j.cnki.nrjgc.2025.06.010
关键词:甲醇汽油发动机  进气温度  燃烧  排放
Key Words:methanol gasoline engine  intake temperature  combustion  emission
基金项目:国家自然科学基金项目（51506047）；河南省科技攻关项目（242102240069， 242102220004）
作者单位E-mail
刘方杰* 河南科技大学 车辆与交通工程学院，洛阳 471000 liufangjie@haust.edu.cn 
郑新国 河南科技大学 车辆与交通工程学院，洛阳 471000 3175314991@qq.com 
谢继成 新疆铁道职业技术学院 机车车辆工程学院，哈密 839000 1224026498@qq.com 
王小利 汝阳县农业农村局，洛阳 471200 LjjxwxL@163.com 
陈一童 新疆铁道职业技术学院 机车车辆工程学院，哈密 839000 2573145681@qq.com 
王清洁 河南科技大学 车辆与交通工程学院，洛阳 471000 wangqingjie67@163.com 
郑大远 河南科技大学 车辆与交通工程学院，洛阳 471000 zhengdayuan@126.com 
王鑫 河南科技大学 车辆与交通工程学院，洛阳 471000 xin_wang@haust.edu.cn 
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摘要:在一台涡轮增压缸内直喷点燃式发动机上研究了进气温度对燃用M15（甲醇体积分数15%，95号汽油体积分数85%）甲醇汽油时发动机性能的影响。研究结果表明，在全负荷工况下，进气温度对甲醇汽油发动机动力性、经济性影响较大，随进气温度升高，转矩最大下降了46 N·m，比油耗增加了16%，同时涡前压力降低。点火时刻随进气温度升高而推迟，在高转速中等负荷工况点，最大延迟了11°曲轴转角，延迟点火导致5%燃烧放热位置后移，缸内最高燃烧压力降低，整体燃烧持续期延长。进气温度从30 ℃升高至60 ℃时，NOx排放整体呈降低趋势，4 500 r/min平均有效压力为1.0 MPa工况点的NOx排放先降低后升高。碳氢化合物排放在部分负荷工况随进气温度升高整体呈下降趋势，全负荷工况先降低后升高。CO排放受发动机工况影响较大，随进气温度升高，低转速部分负荷工况CO排放降低，高转速中等负荷时升高，高转速全负荷时先降低后升高。
Abstract:The effects of intake temperatures on the performance of the methanol gasoline engine fueled with M15 （the volume fraction of methanol accounts for 15%， and that of 95# gasoline accounts for 85%） were investigated on a direct-injection spark-ignition turbocharged engine. The results show that at full load conditions， the intake temperature has a significant effect on the power and economy of the methanol gasoline engine， with a maximum decrease in torque of 46 N·m and an increase in brake specific fuel consumption of 16% with increasing intake temperature， as well as a decrease in pre-turbine pressure. The ignition timing is delayed as the intake temperature increases， with a maximum delay of 11° crank angle at high speed and medium load conditions. The ignition delay causes the 5% heat release position to be pushed back， reducing the peak pressure in the cylinder and extending the combustion duration. When the intake temperature increases from 30 ℃ to 60 ℃， the overall NOx emission shows a decreasing trend， and the NOx emission at the operating point of 4 500 r/min with a brake mean effective pressure of 1.0 MPa first decreases and then increases. As the intake temperature increases， hydrocarbon emissions decrease at partial load， and first decrease and then increase at full load. CO emission is influenced by engine operating conditions. As the intake temperature increases， CO emission decreases at low engine speed and partial load conditions， increases at high engine speed and medium load conditions， and initially decreases and then increases at high engine speed and full load conditions.
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