Dissertation > Transportation > Road transport > Automotive Engineering > Automotive engine

Research on Air Powered Vehicle Engine

Author LiuZuo
Tutor ChenYing;TaoGuoLiang
School Zhejiang University
Course Mechanical and Electronic Engineering
Keywords Aerodynamic car Pneumatic engine Mathematical model Simulation Single-stage expansion Two-stage expansion Test Bench
CLC U464
Type PhD thesis
Year 2004
Downloads 939
Quotes 27
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With the people of the 21st century the increasing requirements of environmental protection and sustainable development, the use of environmentally friendly car cleaning alternative consumption of non-renewable mineral resources such as oil and the internal combustion engine powered vehicles with serious urban air pollution has become an urgent need in today's society. Aerodynamic engine (pneumatic engines) the energy stored in the high pressure air into the torque form the mechanical energy output, does not consume fuel such as oil, as a car can make car truly become zero emissions clean car. This work is the third phase of the project of the Ford Foundation, the National Natural Science Foundation of pneumatic automobile engine exploratory study \) as the basis, the pneumatic engine clean car background, a detailed analysis the pneumatic engine works, as well as the energy release of high-pressure air in the pneumatic engine characteristics, combined with careful experimental work through the theoretical analysis of the system, innovative establish and improve the mathematical model of single-stage expansion and two expansion pneumatic engine, on this basis, the application of mathematical simulation analysis method to start the engine under the different structure and operating parameters characteristic depth, and the development of multiple experimental The pneumatic engine bench test, and pneumatic automobile test for the pneumatic engine optimization design and provide further into the practical application of the theoretical basis and experimental data on pneumatic engine development has important theoretical significance and practical value . The thesis, which reads as follows: Chapter: discusses the origin and significance of the research topic, as well as the research types of car cleaning and Research, analyze the feasibility of a pneumatic automobile, a pneumatic engine research history and the current status of research at home and abroad, and this thesis, the main research work. Chapter II: study the pneumatic engine works, as well as the release of energy of the high-pressure air in the pneumatic engine features that improving the heat exchange conditions in the process of the engine of the in-cylinder gas expansion work, to make it as close as possible to the isothermal process, is to improve work efficiency. way. Study the structural characteristics of the pneumatic engine, drawing air motor base and combined with the performance requirements of the automotive engine, pointed out that with good sealing, high efficiency, greater output torque, low speed and good stability reciprocating piston structure suitable for pneumatic engine requirements. Pneumatic engine - single-stage expansion pneumatic engine working process of the most basic research using thermodynamics and mechanics theory, the mathematical model, simulation method to discuss the application of the theoretical analysis model of the pneumatic engine, Zhejiang University Doctoral Dissertation: the pneumatic engine exploratory study lay the foundation for the subsequent theoretical studies. Chapter 3: use of numerical simulation methods to study the characteristics of single-stage expansion pneumatic engine work, and more comprehensive speed valve timing, intake pressure, cylinder volume and cylinder process diameter ratio parameters on engine performance. The effects were analyzed to obtain the engine performance with the above parameters change the basic law. Chapter IV: on the basis of the second chapter, the establishment of a mathematical model of the two-stage expansion pneumatic engine, and the use of numerical simulation methods pneumatic engine operating characteristics of the two-stage expansion, analysis speed, valve timing, intake investigated the main parameters of the gas pressure, two Bore than inter-stage heat exchanger and ambient temperature on engine performance and engine performance difference with single-stage expansion pneumatic comparative analysis study. Chapter V: the design and manufacture of experimental single-stage expansion of single-cylinder and multi-cylinder pneumatic engine and build pneumatic engine test bench, complete pneumatic engine bench test, at the same time to carry out the integrated technology of pneumatic automobile, success trial experimental pneumatic engine and its supporting air source systems integration to the vehicle, the completion of China's first pneumatic automobile vehicle driving test. Chapter 6: summary of the full text and subsequent work were prospected. Keywords: aerodynamic car, pneumatic engine, mathematical models, simulation, single-stage expansion of the two-stage expansion test rig

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