I. My understanding of vehicle engineering
1 General Understanding
Vehicle engineering is an important field of engineering and technology, focusing on the theory of the issues such as the design and technology of mobile equipment on the land, including automobile tractors, rolling stock, military vehicles and engineering vehicles. Widely used in modern society, not only affects the vehicle transportation industry and automotive industry, is one of the pillar industries of our country, but also on the development of agriculture and the modernization of the country's defense equipment to produce a far-reaching impact.
Vehicle engineering from the initial stage involves mechanics, mechanical design, materials, fluid mechanics, chemical industry to today's expansion to the mechanical and electrical engineering, mechanical design and theory, computers, electronics, test and measurement technology, control technology and other disciplines of the interpenetration, interconnection, and further touching on medicine, physiology and psychology and other broad areas, forming a comprehensive high-tech covering a variety of disciplines and engineering technology fields. Disciplines and engineering technology fields. Vehicle engineering scope from the original mechanics, mechanical design, materials, fluid mechanics and chemistry at present electromechanical engineering, mechanical design and theory, computers, electronics, test and measurement technology and control technology, which is not only interpenetrating each other, but also further with the combination of medicine, physiology and psychology. It has developed into a comprehensive discipline that encompasses multiple high-tech and engineering fields.
2 partial understanding
Emission technology: the main international technical way to reduce automobile emissions, is in the use of high-pressure electronically controlled injection system, supercharging technology, electronically controlled EGR and other technical measures to achieve the European 4 emission standards, generally no longer from the engine itself structure, fuel injection system and other aspects of the technical means, but through the use of multi-effective chemical exhaust purification methods, thereby Reduce the production and technical costs of the engine itself.
Chassis technology: the progress and application of electronic technology, so that the control of automobile chassis from the traditional manual, pedal control to the electronic control mode of development of the emergence of ABS, EBD, EHPS and ECHPS electronic products. In special working conditions, the control of chassis components, has begun the large-scale application of active intervention control systems to complete, such as TCS, ESP, EPS, etc., and furthermore, developed countries have begun to develop fully electronically controlled chassis control system and network management of the overall prototype. Most of the domestic automobile brake system research and development, in the introduction, digestion, absorption stage. China's car transmission market is in a period of rapid development, the manual transmission market has been dominated by independent brands, automatic transmission is mainly imported products. Compared with foreign hydraulic automatic transmission (AT) products, the domestic design, manufacturing level, control strategy and other aspects are backward. Domestic mechanical automatic transmission (AMT) has been developed for a long time, but the electronic control system and other aspects, the technology has not yet fully passed.
Safety technology: automobile safety is divided into active safety and passive safety. At present, the automobile active safety control system mainly includes ABS, TCS/ASR, ESP, BA, 4WS, automobile active front-wheel steering, automobile transverse motion control system, automobile active suspension, automobile active body control, and belong to the advanced automobile control and safety system of intelligent transportation system. The passive safety technology of automobile, mainly involves the protection of automobile occupants, automobile structure crashworthiness, pedestrian collision safety and child safety protection, etc., for example, occupant restraint system, human body collision protection and other technical equipment can play such a protective role.
At present, the development and design of occupant restraint system for domestic passenger cars, mainly for the front seat belt and airbag system. The research on the perfect restraint system is still in its infancy. The research on crash biomechanics started late, and now the work is mainly to track and introduce the research results of the international cutting-edge fields, and carry out some basic experimental research.
Manufacturing technology: China's automotive castings are developing toward high performance, thin-walled, lightweight, fine (accurate) size, excellent cutting performance; casting production process to clean, waste regeneration, high efficiency, energy saving, material saving, environmentally friendly green casting direction.
Automotive machinery cutting and processing technology has been the traditional production of special machines, assembly line production, automatic line production, the development of today's flexible technology as the characteristics of the production line production. High efficiency, precision, flexibility, automation is the main trend of change in cutting processing technology. High-speed machining technology, agile manufacturing technology, intelligent machining technology, green machining technology, etc. will be rapid development. The six major assemblies, such as engine, transmission, axle, frame, body and carriage, are the most important application areas of welding technology in automobile manufacturing. Pulse, double wire MTG / MAG welding, etc. represents the current application in the automotive manufacturing of efficient, high-speed arc welding new technology. The country has basically mastered the deformation characteristics and rules of use of laser splicing welding plate, and has been produced in China. Sedan and even truck welding line, welding robots have been widely used. Non-destructive testing, geometric shape detection technology continues to be developed, through the better online testing, statistical analysis, the implementation of the monitoring of dynamic processes, and to the intelligent, networked monitoring mode.
Materials technology: lightweight materials that have been industrialized and practically applied, mainly high-strength steel, aluminum alloys, magnesium alloys, plastics (including non-metal matrix composites) and other four categories. In the safety, energy saving, environmental protection and other regulations, it is expected that the future of automotive lightweight materials technology will be developed in the following directions: carbon fiber, titanium alloy and metal matrix composite materials and other new materials will be valued and gain application; automotive parts and components design and selection of material concepts will undergo an important change; lightweight materials in the automotive application areas continue to expand.
Noise and vibration technology: NVH is not only an important factor affecting the comfort of the vehicle, but also one of the important indicators for evaluating the quality of automobile quality. Therefore, the world's major automobile companies have set up specialized NVH research institutions, and has formed a set of relatively mature automotive vibration and noise characteristics of the analysis, design and evaluation methods for different grades of models to take different NVH control measures. At this stage, the latest progress and development trend of the world's automotive NVH control technology is: NVH control technology has been applied to the design stage of new automotive products; simulation and analysis of confidence is still the focus of attention in the field of application; NVH virtual environment technology to further engineering applications; vehicle noise control materials and structural technology has been innovative and development.
Two, the prospects and challenges of the automobile industry
China's automobile industry has a bright future, by 2020, China's domestic automobile production will reach about 20 million, when it has long been the world's first automobile producer. With 20% of these products entering the international market, we can see strong growth potential for the automotive industry.
China's automotive industry also faces the challenge of energy. Because China is a large country with a large population and a large energy consumption, there is a great demand for energy, a lot of pollution in many of China's large cities, as well as traffic congestion and road safety problems in China's major cities. Vehicle exhaust pollution is environmental pollution caused by vehicle emissions. The main pollutants are hydrocarbons, nitrogen oxides, carbon monoxide, sulfur dioxide, lead-containing compounds and solid particulate matter, which can cause photochemical smog and other serious environmental problems.
The whole macroeconomic factors will still bring the whole automobile market continues to develop, and Chinese consumers are also able to have their own transportation, because it can reflect their status. Now, despite these good conditions, we also have a lot of challenges, and I believe that with good cooperation between the government, the automakers, we can achieve very practical solutions to promote the development of our entire automotive industry.
Third, the future direction of the automobile
1, the car will be developed in the direction of intelligence, such as cruise control, ultrasonic radar reversing system, follower steering system, intelligent anti-tailgating system, controllable suspension and so on. It can be said that the development and mass application of these new technologies will take a period of time, and now the domestic maintenance of these aspects of the technology is still in the early stages of market development, there is a greater potential for development.
Intelligent vehicles is a set of environmental awareness, planning and decision-making, multi-level assisted driving and other functions in one of the integrated system, which focuses on the use of computers, modern sensing, information fusion, communications, artificial intelligence and automatic control technology, is a typical high-tech complex. The current research on intelligent vehicles is mainly devoted to improving the safety and comfort of automobiles, as well as providing excellent human-vehicle interaction interface. In recent years, intelligent vehicles have become the world's hot spot in the field of vehicle engineering research and the new impetus for the growth of the automobile industry, and many developed countries have incorporated them into their respective focus on the development of intelligent transportation systems.
2, the car will be energy-saving direction, into the 21st century, mankind has to face the development of automobiles brought about by energy and environmental issues. Therefore, energy saving and environmental protection naturally become one of the main directions of automobile technology development. And electric cars, hybrid cars and fuel cell cars are the main object of automotive technology research.
Energy-saving cars refer to low energy consumption, low pollution, small displacement, new energy, new power vehicles. With the abolition of the restriction on small-displacement vehicles, the state will increase support for the research and development and industrialization of energy-saving and environmentally friendly small-displacement vehicles and their advanced engine technologies. Encourage the development and production of diesel cars and mini-cars, as well as the use of alcohol ether fuel, natural gas, mixed fuels, hydrogen fuel and other new fuels.
1/4 of the world's energy is used for transportation, including 2/3 of the oil produced annually. Some energy-saving measures in transportation don't cost anything at all; for example, keeping tires properly inflated improves energy efficiency by 6%. In addition, eco-friendly vehicles such as hybrids can get up to 20% more mileage than conventional cars while consuming the same amount of gasoline.
Four, my career goals
1.Short-term
To pass the four or six levels of English, the second level of computers, proficient in vehicle engineering professional knowledge, learn the language and math, English, a wide range of books, for the examination to lay a solid foundation.
2. Mid-term
Graduate school in information technology, laying a solid foundation for automotive intelligence. Dabbling in aesthetic knowledge, strengthen the humanities.
3.Long-term
To gain a comprehensive understanding of the automobile industry in 3 years, and to become an outstanding automobile designer in 5 years.
Become a leader of this enterprise within 7 years, own your own automobile company within 10 years, build a famous brand of Chinese automobile, and finally go to the world.
V. Summary
It is a wise choice to engage in the automobile industry. It is worth as my lifelong career. "Since I have chosen a faraway place when the wind and rain", perhaps I will encounter a lot of difficulties but I will never give up. "The greatest glory in the world is not in never falling, but in always rising again after falling". I am determined to become an automobile talent with pioneering and innovative spirit! Contribute to China's automobile industry!