Model essay for graduation thesis of automobile maintenance major Part I: Talking about the maintenance and troubleshooting of cooling system.
This paper discusses the function, composition, main structure, working principle, routine maintenance, fault detection steps and troubleshooting methods of the cooling system, discusses the systematic and modular design method of the cooling system, and the intelligent control of the cooling system, and makes a simple introduction with examples.
Keywords: cooling system, cooling system maintenance temperature set point, intelligent control of cooling system
1 Introduction: If the maintenance rate of an engine's cooling system remains high, it will often cause damage to other parts of the engine, especially with the increase of vehicle mileage, the working efficiency of the cooling system will gradually decrease, which will have a great impact on the overall working capacity of the engine. The importance of cooling system is to keep the engine working at room temperature, especially the sweat glands of human skin. If one day, the sweat glands of the human body can't work normally, the heat in the body can't be emitted.
Function, type and composition of cooling system
1 The function of engine coolant is to cool engine parts working at high temperature, so as to ensure that the engine works in a suitable range.
The cooling intensity of the engine coolant system must be appropriate, and its adjustment has a great influence on the engine's work. Insufficient cooling will lead to overheating of the engine, which will further reduce the efficiency of the engine and affect the power output of the engine. Excessive cooling will make the engine working temperature too low, make it difficult to start, make the engine rough, increase heat loss and friction loss, aggravate parts wear, increase CO and HC emissions, lead to a decrease in starting power and an increase in fuel consumption.
2 Type of cooling system
According to the different cooling media, it can be divided into water-cooled and air-cooled.
Water-cooled is to use water or antifreeze as the medium, relying on the circulating flow of cooling water to send the heat of high-temperature machinery to the radiator, and then send the heat to the atmosphere through the radiator.
conclusion
Automobile cooling system is very important for automobile. An engine is like a human heart. If it is not well protected, it will be threatened. Now with the development of science and technology, the cooling system is not just a water cooling cycle as before, and now the intelligent control of the cooling system is very popular. Therefore, in the future development of automobiles, the simple cooling system will not occupy a dominant position. Although the requirement for intelligent control is very high, it is very practical in luxury cars and represents the direction of future cooling system discovery. Intelligent cooling system control will become the standard. Intelligent control will improve the service life of the engine, ensure the safe driving of the car and improve personal safety, and the development of intelligent control cooling system will dominate in the future.
thank you
Time flies, and two years of college life is over. Some are in a hurry, some are reluctant, but they are also very fulfilling. I thank my alma mater, Zhuzhou Vocational and Technical College, for giving me a happy and fulfilling university life worth remembering.
Thanks to my counselor, Mr. Chen Kun. He gave me guidance in my study and selfless help in my life, expressing my heartfelt thanks! I wish the teacher a smooth job, and the peaches and plums are everywhere!
Thanks to my thesis supervisor, Mr. Chen, who gave me a lot of valuable suggestions in the process of writing my thesis, corrected many shortcomings in my thesis and made my thesis complete smoothly. I would like to express my heartfelt thanks to my tutor for his careful guidance! In the two years of college life, there are still many teachers and classmates who have helped me in my study and life. I would like to express my heartfelt thanks to them!
Finally, I wish my alma mater all the best! I wish all teachers good luck in their work!
refer to
[1] Yang Wanfu. Engine principle and automobile performance. Beijing: Higher Education Press, 2004.
[2] Kong Xianhui. Zhang. Automobile fault diagnosis technology. Beijing: Higher Education Press, 2002.
[3] Zhang Xiaobo. Structure and maintenance of automobile engine. Beijing: Higher Education Press, 2005.
[4] Chen Jiarui et al. Automobile Structure. Beijing: People's Communications Press, 2003
[5] Huang Hu et al. Modern Automobile Maintenance. Shanghai: Shanghai Jiaotong University Press, 200 1
Fan Wener: Teaching Reform of Automobile Maintenance Specialty [Abstract] With the development of China's automobile industry, the requirements for automobile maintenance personnel have changed accordingly. In view of this situation, we should be market-oriented and employment-oriented; Facing students and taking skills as the center, we should cultivate students into skilled and applied compound talents to meet the actual needs of production, service and management.
[Keywords:] vocational and technical schools; Auto repair major; reform in education
In recent years, with the rapid development of China's automobile industry, the demand for automobile professionals, especially automobile maintenance professionals, is increasing day by day. In practice, we find that those talents with quick entry into the role, strong learning ability, strong hands-on ability and excellent innovation ability are favored by enterprises. In view of this situation, we should be market-oriented and employment-oriented, and cultivate students into skilled and applied compound talents to meet the actual needs of production, service and management. Based on this goal, we should explore a set of real-time and effective teaching mode in the course teaching of automobile maintenance specialty.
First, the basic requirements of the automobile maintenance industry for employees
1. Strong logical reasoning ability.
What is the main task of auto repair at present? Diagnosis? , the so-called? Seven-point diagnosis and three-point training? What truly reflects the level of a maintenance personnel is the accuracy of his diagnosis. In the process of diagnosis, ask the diagnostician? Understand the principle and be proficient in analytical reasoning and diagnosis? , can quickly and accurately eliminate incurable diseases. So it is difficult for a person who can't reason and analyze logically to become a good repairman.
2. Skilled hands-on operation ability.
? Vocational qualification certificate? It is an access card for technicians to engage in technical work. It is also a legal certificate to prove students' practical ability. When students are in school, at the end of each subject module, the school arranges the professional qualification appraisal of the corresponding type of work. To enable students to successfully complete the transformation from school to enterprise and from students to workers, to link the cultivation and development of students' practical ability with the needs of enterprises, to make the development of students' operational skills more practical and directional, and to enhance students' strength and competitiveness in society.
3. Self-care and self-discipline.
Self-care and self-discipline are the basis of students' self-reliance and the premise of their further development. Self-management, self-restraint, self-improvement and consciously observing industry norms in the workplace are the embodiment of students' self-care and self-discipline ability. Through the guidance and indoctrination in daily teaching, students can develop the habit of introspection, realize the purpose of self-management and self-education, form the sense of self-discipline and work responsibility, and morally cultivate the behavior of turning passivity into initiative and restraint into consciousness. This kind of conscious action will become the driving force for students to fulfill moral norms and form stable quality.
4. Ability to obtain maintenance information.
As technicians, we must understand the market, industry and career trends in order to better serve others and stand on our own posts. The mastery of industry information can make students' learning change from passive to active, and generate professional interest in learning. As long as the teacher gently pushes in the classroom, he can quickly master the relevant theoretical knowledge and skills. Therefore, the cultivation of students' market research ability is mainly to guide students to understand the market trends, the operation methods of new technologies and the use methods of equipment through the form of assignment. At the same time, teachers also conduct market research to give students the latest cutting-edge information and enhance their interest in market research.
Second, the automobile maintenance professional teaching reform measures
1. Reasonable orientation of teaching content.
The content of theoretical teaching should meet the needs of the front line of automobile maintenance and reflect the latest development trend of automobile maintenance, and those outdated contents should be resolutely deleted; Teaching content should be able to extract the basic concepts, principles and skills of a subject and form a logical and systematic knowledge system, which is conducive to students' understanding and transfer of knowledge. Practice contents such as experiments and internships: Experiments are essential for a highly skilled course such as Auto Repair. Experiment is a supplementary explanation and practical proof of theoretical knowledge in the course. When designing experiments, we should pay attention to practicality and feasibility.
2. Reasonable combination of teaching forms.
Theoretical teaching should be designed around practical skills and be sufficient in theory. According to different learning levels, different knowledge unit structures are set up, and the correlation between related knowledge points is established to ensure that you can jump as needed in the process of learning or teaching. The course content is organized in a modular way, and the division of modules should be relatively independent, basically taking knowledge points or teaching units as units. According to the specific knowledge requirements, the course content should adopt various forms of expression such as words, sounds, images and animations. Make video courseware mainly taught by teachers, with a large number of physical pictures and animations to make up for the lack of practical knowledge. Use animation, video and other ways to stimulate students' interest in learning and easily solve the key and difficult points in teaching. In theoretical teaching, we should pay attention to cultivating students' ability to analyze and solve problems and cultivate standardized practical skills. Combined with the characteristics of multimedia technology, abstract problems are well combined with practice to explain difficult problems clearly and easily.
3. Strengthen the cultivation of students' employment awareness.
While strengthening the cultivation of practical skills, we should vigorously strengthen the education of students' awareness of employment and service, and improve their comprehensive quality. There are great problems in quality education in traditional education in China. Only pay attention to theoretical achievements, but ignore moral education and ability education. Although the trained students are ready to answer theoretical questions, they lack professionalism and hardship in practical work, and lack the ability to solve problems and improvise in service. Students are generally not clear about their own understanding, learning and mastering the relationship between technology and immediate interests, and lack the confidence and courage to start their own businesses, which has caused obstacles to their work and development. We should vigorously strengthen vocational education in this area, so that students can understand that only by mastering technology can they benefit for life, and employment education and service education should run through education.
4. School-enterprise zero-distance contact.
For a long time, our schools and enterprises have gone their own way. This has caused the school not to understand the needs of enterprises, enterprises do not care about the school's education methods, and can not cultivate the talents needed by enterprises. To change this situation, it is necessary to strengthen the contact between enterprises and schools, unite them and exchange needed goods to shoulder the heavy responsibility of talent training together. At the same time, the development of modern automobile technology is changing with each passing day. Enterprises can be the first to come into contact with new technologies, but the acceptance of new technologies by schools is always lagging behind. Only by more contact and communication with enterprises, relying on enterprise resources, sharing technology and equipment with enterprises, and shouldering the heavy responsibility of talent training, can schools cultivate useful talents with new knowledge and technology.
5. Cultivate real double-qualified teachers.
? Double-qualified? The construction of teaching staff is the focus of teaching work. We're adopting? Send it out and bring it in? On the one hand, teachers are regularly sent to relevant enterprises for special training; On the other hand, organize professional teachers' special skills training and professional teachers' skills competition, and professional teachers compete with employees of maintenance enterprises on the same stage. At the same time, teachers are required to use maintenance workers or even maintenance technicians to improve their practical skills and fully ensure the teaching quality of specialized courses.
References:
Wang Qi. Reflections on the design of online courses [J]. China Distance Education, 2002.
[2] Lu Genliang. Analysis of the Problems in Automobile Vocational Education [J]. Science and Technology Information, 2007.
[3] Zhu Zhu. Present situation and countermeasures of automobile maintenance vocational education and training [J]. Theoretical research, 2007.
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