Performance Optimization and Improvement of Small Gasoline Engine

Abstract

Abstract: Aiming at the general structures of traditional small gasoline engines and poor performance caused by design flaws，the improvement is carried out from the ignition system，the intake system，the burning system，and fuel supply systems; meanwhile，a pilot study is made． Experiment results show that the improved engine power averagely increase 46． 58%; torque averagely increase 47． 02%; fuel consumption rate averagely lower 31． 39%，fuel consumption rises by 1． 31%; maximum torque rises by 44． 36%，and its corresponding revolution declines to 2404r /min; the maximum power rises by 50． 00%，and its corresponding revolution rises to 3803r /min． Therefore，the reasonable direction and method is proposed for the performance improvement of traditional small engine．

Key words: small gasoline engine, performance, optimization and improvement, pilot study

摘要： 针对传统小型汽油机普遍存在结构和设计缺陷而导致性能欠佳的现象，从点火系统、进气系统、燃烧系统、燃料供给系统等方面进行改进，并进行实例试验研究。试验结果表明: 改进后的发动机平均功率值提高了46． 58%; 平均扭矩值提高了47． 02%; 平均燃油消耗率值降低了31． 39%，但燃油消耗量上升了1． 31%; 最大扭矩上升了44． 36%; 最大扭矩对应的转速下降到2 404 r /min; 最大功率上升了50． 00%; 最大功率对应的转速上升到3 803 r /min。这为传统小型汽油机性能改进提出了合理的方向和方法。

关键词: 小型汽油机, 性能, 优化改进, 试验研究

CLC Number:

TK412

LIAO Fa-liang，YANG Hong. Performance Optimization and Improvement of Small Gasoline Engine[J]. Journal of Chongqing Jiaotong University(Natural Science), 2011, 30(1): 130-135.

廖发良，杨宏. 小型汽油机的性能改进研究[J]. 重庆交通大学学报（自然科学版）, 2011, 30(1): 130-135.

References

［1］杨金泉．碾压混凝土路面施工技术［M］．北京: 人民交通出版社，2000: 1－5．
YANG Jin－quan．Roller Compacted Concrete Pavement ConstructionTechnology［M］．Beijing: China Communications Press，2000: 1－5．
［2］张宏涛．RCC－AC 复合式路面RCC 层施工工艺［J］．山东交通学院学报，2002，10(3):62－63．
ZHANG Hong－tao．The RCC construction technology of RCC-ACcompound type pavement［J］．Journal of Shandong Jiaotong University，2002，10(3):62－63．
［3］何兆益，章佩佳．复合碾压混凝土路面温度应力分析［J］．重庆交通大学学报: 自然科学版，2010，29(4):540－543，666．
HE Zhao－yi，ZHANG Pei－jia．Temperature stress analysis ofcomposite roller compacted concrete pavement ［J］．Journal ofChongqing Jiaotong University: natural science，2010，29 (4 ):540－543，666．
［4］李世绮，牛开民．高等级公路(全厚式)碾压混凝土路面技术［J］．公路交通科技，1997，14(1):29－33．
LI Shi－qi，NIU Kai－min．Highway (full depth)roller compactedconcrete pavement［J］．Journal of Highway and TransportationResearch and Development，1997，14(1):29－33．
［5］ JTG F 30—2003 公路水泥混凝土路面施工技术规范［S］．北京: 人民交通出版社，2003．
JTG F 30—2003 Technical Specification for Construction of HighwayCement Concrete Pavements［S］．Beijing: China CommunicationsPress，2003．
［6］王振辉，蔡良才，刘晓军，等．正交法碾压混凝土基层设计研究［J］．混凝土，2007(2):82－83．
WANG Zhen－hui，CAI Liang－cai，LIU Xiao－jun，et al．Researchingthe design of flight strip roller compacted concrete baseby means of orthogonal experiment［J］．Concrete，2007 (2):82－83．
［7］ JTJ 034—2000 公路路面基层施工技术规范［S］．北京: 人民交通出版社，2000．
JTJ 034—2000 Technical Specifications for Construction of HighwayRoadbases［S］．Beijing: China Communications Press，2000．
［8］ JTJ 057—94 公路工程无机结合料稳定材料试验规程［S］．北京: 人民交通出版社，1994．
JTJ 057—94 Test Methods of Materials Stabilized with InorganicBinders for Highway Engineering［S］．Beijing: China CommunicationsPress，1994．
［9］房万山，鲍福堂．论我国发展碾压混凝土路面的技术条件［J］．黑龙江交通科技，2004，27(4):39－40．
PANG Wan－shan，BAO Fu－tang．The technical conditions ofdeveloping roller compacted concrete pavement in China ［J］．Communications Science and Technology Heilongjiang，2004，27(4):39－40．

[1]	WAN Jiakai1, MA Licheng2, TIAN Zhidian1, CHENG Xiaoliang1, ZHANG Haojun1, ZHU Aizhu2. Experimental Study on the Bonding Performance of High-Strength Steel Bar and UHPC Interface [J]. Journal of Chongqing Jiaotong University(Natural Science), 2026, 45(2): 1-7.
[2]	YUE Hongzhi1,2, CHEN Yingjiao3, ZHAO Lin1,2, ZHOU Haifang3, LYU Quan4. Pavement Performance of Chemically Activated Terminal Blend Rubber Powder Modified Asphalt Mixtures [J]. Journal of Chongqing Jiaotong University(Natural Science), 2025, 44(7): 59-66.
[3]	YU Hao1, YANG Jie2, HE Zhaoyi2, QIN Min3, YANG Zhiqiang2. Coarse Aggregate Angularity and Its Influence on the Performance of Asphalt Mixture [J]. Journal of Chongqing Jiaotong University(Natural Science), 2025, 44(6): 26-34.
[4]	XU Xinquan1, HU Yuanjiao2, WENG Yuhan3, HE Weijie1. Road surface texture is a key factor affecting the skid resistance performance. To further study its influence mechanism and to solve the problem of limited accuracy of traditional prediction methods under multi-feature data conditions, a pavement skid resistance performance assessment model based on the fusion of Bayesian optimization algorithm (BOA) and extreme gradient boosting (XGBoost) was proposed. Firstly, specimens phalt mixtures of different gradation types were prepared. Friction data and 3D texture data of the specimen surface were respectively obtained by using a pendulum friction meter and a 3D laser scanning device. Secondly, the height, the wavelength and shape parameters were extracted to describe the texture structure, and the texture feature importance analysis was carried out to clarify the factors that significantly affected the skid resistance. Then, the optimal key parameters were improved by introducing of the model BOA-XGBoost and the prediction model of skid resistance performance was established. The research results show that compared with the comparative models, the proposed model has higher accuracy, with a correlation coefficient R2 of 0.890 6, which is 25.2%, 13.0%, and 15.1% higher than those of the comparative models, respectively. The proposed model can effectively correlate texture features with pavement skid resistance performance. [J]. Journal of Chongqing Jiaotong University(Natural Science), 2025, 44(6): 35-44.
[5]	CHEN Zhongzhang1, DUAN Muzi1, CAI Shengyu1, SU Weifeng1, LI Pengfei2. Mechanical and Microscopic Properties of High-Performance Concrete Prepared by Tunneling Excavation Materials [J]. Journal of Chongqing Jiaotong University(Natural Science), 2025, 44(2): 34-42.
[6]	LIU Feifei, LIU Shuaihua, LI Jianqiang, QIN Wu, LI Jun. Influencing Factors of Liquid Cooling Heat Dissipation Performance of Lithium-Ion Batteries [J]. Journal of Chongqing Jiaotong University(Natural Science), 2025, 44(11): 1-10.
[7]	WANG Hainian1, LI Yingkai1, WANG Huimin2, LI Lian1, SONG Haoran1. Influence of Coarse Aggregate Morphology on the Anti-slip Performance of Asphalt Pavement [J]. Journal of Chongqing Jiaotong University(Natural Science), 2025, 44(1): 25-32.
[8]	LIU Gang, CHEN Tianyu, ZHANG Baolai, ZHANG Hongyang. Anti-pitch Interconnection Mode of Hydraulic Suspension for Tracked Vehicles [J]. Journal of Chongqing Jiaotong University(Natural Science), 2024, 43(9): 127-134.
[9]	PAN Xuejiao1, 2, DONG Shaojiang2, ZHOU Cunfagn2, XIAO Jiafeng2, SONG Kai3. Rolling Bearing Life State Recognition Based on Deep Convolutional Autoencoder and Multi-scale Residual Shrinkage Network [J]. Journal of Chongqing Jiaotong University(Natural Science), 2024, 43(5): 124-132.
[10]	XU Xiangyang1, CHEN Qingke1 ,WANG Han1, REN Ziyuan1. Reliability Analysis of Urban Rail Vehicle Gear Wear Considering Corrosion [J]. Journal of Chongqing Jiaotong University(Natural Science), 2024, 43(2): 107-114.
[11]	YANG Bo1,2, ZHOU Bo1, CHENG Yihuan1, ZHANG Meng1, TANG Naipeng1,2. Road Performance of Oyster Shell Powder Asphalt Mortar [J]. Journal of Chongqing Jiaotong University(Natural Science), 2024, 43(1): 26-30.
[12]	ZHOU Yingchao1, WANG Baolin1, LI Lianqiang2, TIAN Ying1, MENG Xinrui1. Construction Method of Truck Actual Working Condition Based on Clustering and Markov Chain [J]. Journal of Chongqing Jiaotong University(Natural Science), 2024, 43(1): 116-124.
[13]	MA Tingting, ZHANG Shishou. Mechanical Performance of 1,000-Meter Level Open-Section Composite Girder Cable-Stayed Bridge with Steel-UHPC Composite Bridge Deck [J]. Journal of Chongqing Jiaotong University(Natural Science), 2023, 42(9): 11-17.
[14]	HUANG Weirong1, XIONG Kelin1, LI Huailong2, WANG Jiao3. Effect of Fillers on High Temperature Performance of Waterborne Epoxy Emulsified Asphalt Mortar [J]. Journal of Chongqing Jiaotong University(Natural Science), 2023, 42(9): 42-49.
[15]	ZHOU Xinxing1,2. Fatigue Characteristic of Wood Dust-Based Bio-oil Regenerate Aged Asphalt [J]. Journal of Chongqing Jiaotong University(Natural Science), 2023, 42(9): 57-62.