崔淑华　刘功兴

摘要：基于乙醇汽油和汽油的空燃比的差异以及对发动机性能的影响，在不改变发动机结构参数的情况下，试验研究发动机燃用93号E10和93号汽油的基本性能。从试验可以得出发动机燃用乙醇汽油与汽油的动力性、经济性及排放特性对比。在中、低转速动力性下降，在较高转速动力性相当；燃油经济性在低、中负荷略有下降，在高负荷略好于汽油；在怠速工况下，乙醇汽油会降低汽油机的CO、HC和NOx的排放。针对燃料空燃比对发动机的性能影响，对发动机燃用乙醇汽油的空燃比的控制进行研究。对发动机的喷油器喷孔直径、喷油脉宽及喷油量的定量修正，为发动机燃用乙醇汽油的空燃比控制提供参考。

关键词：乙醇汽油；发动机性能；空燃比；控制

中图分类号：S 782.51文献标识码：A文章编号：1001-005X（2015）01-0075-03

Research on Airfuel Ratio Control of the Engine Burning Ethanolgasoline

Cui Shuhua，Liu Gongxing

（Traffic College，Northeast Forestry University，Harbin 150040）

Abstract：Based on the airfuel ratio difference between ethanol gasoline and gasoline and the influence on engine performance，without changing the structure parameters of the engine，the basic performance of engine burning ethanolgasoline（E10）and gasoline was analyzed.The power performance，economy，and emission characters of the engine buring the two fuels were obtained.At the medium or lower RPM，the power performance decreased and at the higher RPM the power performance was almost the same.The economy of ethanolgasoline at lower and medium load decreased slightly，but was better than gasoline at higher load.While idling，the emissions of CO，HC and NOx by buring ethanolgasoline were lower than that buring gasoline.According to the influence of airfuel ratio on the performance of engine，the airfuel ratio control for the engine burning ethanolgasoline was studied.The quantificational modification method on the diameter of injectors nozzle bore and injection pulse width of engine was discussed，which provides reference to airfuel ratio control method of the engine burning ethanolgasoline.

Keywords： ethanolgasoline；engine performance；airfuel ratio；control

收稿日期：2014-08-01

基金项目：黑龙江省交通运输厅科技项目（黑龙江省道路运输业节能减排评价方法研究）

第一作者简介：崔淑华，硕士，教授。研究方向：汽车节能减排技术。Email：616960166@qq.com

引文格式：崔淑華，刘功兴.燃用乙醇汽油发动机空燃比控制研究[J].森林工程，2015，31（1）：75-77.由于石油短缺和汽车尾气排放对大气环境污染的日益严重，开发低污染代用燃料 已引起各国研究者的重视。乙醇因其理化性质接近汽油且辛烷值高、毒性小，与汽油混合后可作为车用燃料，对乙醇汽油进行了大量的试验研究[1-8]。Stump等人在某轻型客车上对乙醇汽油的燃用效果进行了试验，结果显示，发动机排气中HC和CO的排放均有较大幅度的下降[9]。……