汽車外文翻譯--汽車新能源現(xiàn)狀與發(fā)展的探究-汽車設(shè)計(jì)(編輯修改稿)
2025-02-24 03:59 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 for vehicles pared 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 parison 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 pared to 90% CO, 90% S02, 72% HC, 39% NOx, 24% CO2, nondust 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, pressed 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 ℃, pared to not ignite. Low density of methane, the relative density of about , 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 bustion conditions, once the pressed natural gas from the tank or pipe leaks, leak immediately surrounding the formation of lowtemperature zone, so that the difficulties of natural gas bustion. 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 pressed natural gas cylinder vehicle standards)) (GBl72581998).Cylinders fitted with explosionproof 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 nonpressure vessels, fire easily after the explosion.3, will help ease the contradiction between energy supply and demand tension.China39。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 parison is totally clean。 can improve the thermal cycle efficiency, speed up the burning speed, full use of bustion 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 fu
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