CNG ENGINES

CNG ENGINES

ABSTRACT

There is no mistaking the fact that alternative fuel sources such as CNG, LPG, hydrogen etc. could be principal fuels powering vehicles of our future. But due to number of safety aspects that were ignored.

CNG fuel is stored in steel pressure cylinder with a carbon fibre wrap. To use CNG as a fuel, different CNG engines are used. A country can have cleaner environment with comprehensive use of CNG because they emit less nitrogen oxides or hydrocarbons, while new job opportunities and economy are other benefits of using CNG.

CNG is abundantly available. It is not corrosive or toxic, also it is biologically inert and hence does not create any problem if exposed to lungs or skin. It is lighter than air so it rises up and dissipates into air.

We may never see a large percentage of CNG vehicles on the road but it is
one alternatives to help reduce vehicle emissions.
Thus CNG use can help in improving quality of life.

INTRODUCTION

Now a days "who the hell cares"are over. The Hon'ble Supreme Court has now started to take the strict decisions against pollution due to vehicles. One of the examples of this is compulsion of EURO II norms to all private vehicles .These steps have been taken with a view to arrest the increasing amount of vehicular pollution. Actually, there are many factors,
natural or otherwise that contribute to the pollutants in the air we breathe, but vehicular pollution contributes almost half of the overall pollution.

CO emission is the attraction catching point in case of petrol. This CO gas when reacts with hemoglobin in the blood, reduces its oxygen carrying capacity.

Unburned hydrocarbon emission is the main polluting element incase of diesel fuel. The soot formation is more incase of diesel. The very fine hydrocarbon particulates that can be detected go into the lungs and may cause lung cancer or other lung diseases.

On the other hand, rapid depletion of petrol and diesel complemented by their skyrocketing prices from the backdrop of today's questiondustry and hence this is the cardinal reason which leads to an intensive search of alternative fuels.

Some fuels are inherently cleaner than petrol because they emit less nitrogen oxides or hydrocarbons they do emit are less likely to react in the atmosphere. These fuels include alcohols, liquified petroleum gas and compressed natural gas.

Compressed Natural Gas technology is more than five decades old and it helps to substitute diesel and gasoline in vehicles. Thus CNG offers a way to get rid of several pollutants emitted by the automobiles using conventional fuels. Use of natural gas can help in reduction of CO, reactive hydrocarbons and elimination of lead and particulate emission.

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