各专业全套优秀毕业设计图纸The Investigation Of Car new energy'S PresentCondition And DevelopmentAs the world energy crisis, and the war and the energy consumption of oil -- and are full of energy, in one day, someday it will disappear without a trace. Oil is not in resources. So in oil consumption must be clean before finding a replacement. With the development of science and technology the progress of the society, people invented the electric car. Electric cars will become the most ideal of transportation.In the development of world each aspect is fruitful, especially with the automobile electronic technology and computer and rapid development of the information age. The electronic control technology in the car on a wide range of applications, the application of the electronic device, cars, and electronic technology not only to improve and enhance the quality and the traditional automobile electrical performance, but also improve the automobile fuel economy, performance, reliability and emissions purification. Widely used in automobile electronic products not only reduces the cost and reduce the complexity of the maintenance. From the fuel injection engine ignition devices, air control and emission control and fault diagnosis to the body auxiliary devices are generally used in electronic control technology, auto development mainly electromechanical integration. Widely used in automotive electronic control ignition system mainly electronic control fuel injection system, electronic control ignition system, electronic control automatic transmission, electronic control (ABS/ASR) control system, electronic control suspension system, electronic control power steering system, vehicle dynamic control system, the airbag systems, active belt system, electronic control system and the automatic air-conditioning and GPS navigation system etc. With the system response, the use function of quick car, high reliability, guarantees of engine power and reduce fuel consumption and emission regulations meet standards.The car is essential to modern traffic tools. And electric cars bring us infinite joy will give us the physical and mental relaxation. Take for example, automatic transmission in road, can not on the clutch, can achieve automatic shift and engine flameout, not so effective improve the driving convenience lighten the fatigue strength. Automatic transmission consists mainly of hydraulic torque converter, gear transmission, pump, hydraulic control system, electronic control system and oil cooling system, etc. The electronic control of suspension is mainly used to cushion the impact of the body and the road to reduce vibration that car getting smooth-going andstability. When the vehicle in the car when the road uneven road can according to automatically adjust the height. When the car ratio of height, low set to gas or oil cylinder filling or oil. If is opposite, gas or diarrhea. To ensure and improve the level of driving carsdriving stability. Variable force power steering system can significantly change the driver for the work efficiency and the state, so widely used in electric cars. VDC to vehicle performance has important function it can according to the need of active braking to change the wheels of the car, car motions of state and optimum control performance, and increased automobile adhesion, controlling and stability. Besides these, appear beyond 4WS 4WD electric cars can greatly improve the performance of the value and ascending simultaneously. ABS braking distance is reduced and can keep turning skills effectively improve the stability of the directions simultaneously reduce tyre wear. The airbag appear in large programs protected the driver and passenger's safety, and greatly reduce automobile in collision of drivers and passengers in the buffer, to protect the safety of life.Intelligent electronic technology in the bus to promote safe driving and that the other functions. The realization of automatic driving through various sensors. Except some smart cars equipped with multiple outside sensors can fully perception of information and traffic facilities and to judge whether the vehicles and drivers in danger, has the independent pathfinding, navigation, avoid bump, no parking fees etc. Function. Effectively improve the safe transport of manipulation, reduce the pilot fatigue, improve passenger comfort. Of course battery electric vehicle is the key, the electric car battery mainly has: the use of lead-acid batteries, nickel cadmium battery, the battery, sodium sulfide sodium sulfide lithium battery, the battery, the battery, the flywheel zinc - air fuel cell and solar battery, the battery. In many kind of cells, the fuel cell is by far the most want to solve the problem of energy shortage car. Fuel cells have high pollution characteristics, different from other battery, the battery, need not only external constantly supply of fuel and electricity can continuously steadily. Fuel cell vehicles (FCEV) can be matched with the car engine performance and fuel economy and emission in the aspects of superior internal-combustion vehicles.Along with the computer and electronic product constantly upgrading electric car, open class in mature technology and perfected, that drive more safe, convenient and flexible, comfortable. Now, the electric car from ordinary consumers distance is still very far away, only a few people in bandwagon. Electric cars with traditional to compete in the market, the carwill was electric cars and intelligent car replaced. This is the question that day after timing will come. ABS, GPS, and various new 4WD 4WS, electronic products and the modern era, excellent performance auto tacit understanding is tie-in, bring us unparalleled precision driving comfort and safety of driving.First, the development of natural gas vehicleReduce pollution to protect the environment, many countries have issued a series of government regulations and the introduction of a number of incentive policies to promotethe development of gas vehicle, such as the development of more stringent vehicle emission standards, in the natural gas supply, car purchase taxes and fees, equipment supply, gas station construction grant funds, tax incentives.or the purchase of alternative fuel vehicles and the construction of stations in detail the provisions of the tax relief, but also enacted a tax cut that the use of natural gas and natural gas companies exempt from motor vehicle fuel sales tax. There are more than 40 states in accordance with the policy of the federal government, law, drawn up on the mandatory state and encourage the use of clean fuel CNG vehicles, such as policies and measures to promote the CNG filling station development and construction of motor vehicles. At present, more than 40 countries around the world have a gas car, mainly in the rich natural gas resources in Italy, New Zealand, Argentina, Brazil and other countries and stricter environmental regulations the United States, Japan and other countries.Second, natural gas vehicle (CNG) fuel and other environmental and economic benefits comparedCompressed natural gas vehicles:20MPa compressed natural gas in the car to compressed natural gas cylinders in use by the supply of internal combustion engine after the pressure reducer.To CNG fuel for vehicles compared with gasoline has the following advantages: l, reduce pollution and improve the atmospheric environment: natural gas is a clean energy, with a high calorific value, high efficiency, pollution, etc., the comparison is totally burned, not carbon deposition, CO, NOx and particulate emissions than gasoline, significantly reduced exhaust pollution. Motor vehicle exhaust is the major source of urban air pollution, one of which is carbon monoxide harmful ingredients (C0), hydrocarbons (HC), nitric oxide (N0) and nitrogen dioxide (NO2) and so on. According to the data, the use of gas as a motor fuel and gasoline as fuel can reduce emissions compared to 90% CO, 90% S02, 72% HC, 39% NOx, 24% CO2, non-dust emissions, to improve the urban environment has a significant role in . A typical diesel engine and gasoline engine emissions and gas machine is shown in table l.2, CNG vehicle for a higher securityCompared with gasoline, compressed natural gas is a relatively safe fuel.(1) natural gas explosion limit is 5% higher than gasoline (lower explosion limit for the l%) high, methane ignition for 645 ℃, ignition than gasoline high 218 ℃, compared to not ignite. Low density of methane, the relative density of about 0.55, resulting in leakage of gas will soon be distributed in the air, in the case of the natural environment it is difficult to form a hot combustion conditions, once the compressed natural gas from the tank orpipe leaks, leak immediately surrounding the formation of low-temperature zone, so that the difficulties of natural gas combustion. Therefore is a fairly safe CNG motor fuel. Natural gas and fuel properties of gasoline is shown in table 2(2) Department of natural gas vehicle cylinder pressure vessel(20MPa), its materials and manufacture and testing in order that all States have strict control, in China there are "compressed natural gas cylinder vehicle standards))(GBl7258-1998).Cylinders fitted with explosion-proof facilities, pressure reducer, valves and other equipment, strict standards high, and gas supply system is safe and reliable and will not tip over due to vehicle collision or cause fire or explosion, and the petrol tank of motor vehicles department of non-pressure vessels, fire easily after the explosion.3, will help ease the contradiction between energy supply and demand tension.China's economy is in a stage of rapid development, the number of vehicles to 1 million / year above the rate of increase of a substantial increase in gasoline demand of resources, our need to import large quantities of crude oil per year, refined oil and LPG. Optimize the use of gas carsMotor fuel supply structure has changed only motor fuel gasoline, diesel patterns, not only eased the problem of shortage of petrol and transport services to meet the needs of the development.4, extend engine life. The spread of natural gas to the gas entering the engine, the engine easily and uniformly mixed air, burning the comparison is totally clean; can improve the thermal cycle efficiency, speed up the burning speed, full use of combustion heat; CNG octane number at the same time high performance uprising, when agents do not need to add the uprising will not dilute the lubricating oil, making the parts inside the engine cylinder greatly reduce wear and tear, so that the engine oil life and increase the use of the period. All of these vehicles will reduce maintenance and operating costs, thereby enhancing the economy of the use of vehicles. 5, have a higher economic efficiency. At present, domestic gasoline prices continued to rise, the price system and the world has been the use of CNG vehicle will be able to save nearly 40% of fuel costs, as shown in table 3.Third, CNG cars and filling stations to explore the development of countermeasuresIn order to speed up the use of natural gas as a clean fuel vehicle development, makes the following recommendations:1, the Government has introduced policies to encourage and support: the development of all countries in the world experience shows that government support is a necessary condition for accelerated development, the impact of its economic policy is an importantfactor in their development should be guaranteed in law, in the gas automobile production, modification, parts and components production, station construction, vehicle purchase and use of gas, maintenance and other aspects of pricing, taxation, investment, subsidies and other aspects of the preferential policies supporting. Gas prices affect gas vehicle development is an important factor, only the gas prices and gasoline prices when the difference is large enough to form, gas car before the development of an economic foundation and driving force.2, strengthen leadership, the implementation of unified management.The development of CNG vehicles to the construction of high-quality, convenient filling stations, the need for planning, public security, fire safety, labor, technical support supervisor and other departments.3, in the municipal plan, filling stations and gas stations should be consideredco-ordination, rational distribution and coordinated development. To make full use of existing land resources and in ensuring the environmental safety of oil and gas under the premise of building one station.4, followed by motor cars and CNG filling stations in the simultaneous development of the principles, only in the stations into a network under the conditions, CNG vehicle can really develop. At the same time scale of only CNG car to a certain number, the normal operation of filling stations in order to achieve profitability.5, the strict legal system: the development of stringent vehicle emissions regulations, and make sure that standards are not road vehicles are determined not to be on the qualifications of CNG vehicle Modify-Factroy critical examination, certification. First of all, the city should the city bus, taxi, as the focus of the development of CNG vehicle, bus stop some of the phenomenon of black smoke pollution of the environment.6, step up publicity. At present, natural gas car is still at the initial stage, the public nature of its environmental protection, safety, economy, reliability, do not fully understand, so, it is necessary to carry out a wide range of social advocacy, efforts to increase awareness of the dangers of automobile exhaust, to make people aware of CNG is a clean, safe and economical fuel, so that the development of natural gas vehicles have been recognized by all sectors of society and support.Compressed natural gas vehicles because of its remarkable economic and social benefits the development of the natural gas market will become a new field of applications. More and more importance in the environmental protection situation, along with natural gas resources in the area of the development and application of the widening, which will reduce the environmental pressure is to ease the oil shortage and achieve sustainable development of a reliable guarantee.汽车新能源现状与发展的探究随着世界能源危机的持续，以及战争和能源-----石油的消耗及汽车饱有量的增加，能源在一天一天下降，终有一天它会消失的无影无踪。