2. The two main problems of the internal combustion engines There are two main kinds of problems in internal combustion engine which contribute negatively in our life. These two problems are the emissions, which is related to the environment, and mechanical problems, which are related to the internal combustion engines themselves. In this project, the focus will be on some solutions for these two problems. 2.1 Emissions The exhausts of vehicles, internal combustion engines, are a main source of emissions. Before 1900s, this severe problem was not recognized due to the small numbers of automobile. However, this problem became bigger with the increasing of cars due to the increase in populations. By the 1940s the problem of pollution first appeared in the USA, Los Angeles, due to the high numbers of cars and population. By 1970 the problem of emissions was clearly recognized in most American cities which might indicate that the internal combustion engine is the …show more content…
2.2.II. Self-ignition Self-ignition can be defined as the situation in which the fuel in a combustion chamber burned automatically without external cause such as a spark plug, and this is caused due to the extremely high temperature and pressure inside the chamber. Furthermore, the fuel inside the combustion chamber will not burn in the proper time, and the combustion cannot be as efficient as if it burns in a proper time. Consequently, this problem will have negative effects from both economic and environmental perspectives (Willard, 1997). 2.2.III. Incomplete combustion This situation is usually happened if there is a lake of air inside the combustion chamber or the oxygen is poor. In this situation carbon monoxide, carbon and water are produced. Furthermore, there will be two problems with this kind of combustion which are producing a poisonous gas, carbon monoxide, and the fuel will not burn efficiently (Bbc.co.uk,
For the first phenomena, he noted how all combustions involved the formation of fire or light. With that in mind, Lavoisier also observed that this combustion occurs only through dephlogisticated air / pure air. Other airs (e.g. carbon dioxide) act as a fire extinguisher similar to that of water. Another combustion phenomenon he outlined was how the weight of the burnt material directly relates to the amount of air used in the reaction. Moreover, he also described how certain substances turn into acids after it has been burn...
Combustion is an exothermic reaction that reacts when in contact with oxygen producing heat and a new product. These reactions are as exothermic as it gets. The general form of a combustion reaction is the reaction between a hydrocarbon and oxygen to create carbon dioxide and water. Hydrocarbon + O₂→CO₂+H₂O. Occasionally, these reactions can release light and produce a flame. To start a reaction, most require a flame to provide heat and initiate the reaction. Combustion is a very common reaction. It's what makes our cars go, and it's what burning is. It is containing carbon which reacts with oxygen to form CO2 and H2O. A simple example of the combustion of Methane, a natural gas, CH4 + 2O2 →CO2 + 2H2O. Another example includes the burning of naphthalene with the equation C10H8 + 12 O2 → 10 CO2 + 4 H2O. The combustion of ethane is 2C2H6 + 7O2 → 4CO2 + 6H2O which is another example. A real life example is the combustion of gunpowder. Gunpowder is a mix of potassium nitrate, charcoal, and sulfur. The potassium nitrate decomposes at a high temperature to provide the oxygen needed. The charcoal and sulfur are the fuels in this reaction. The equation for this reaction is as follows 2 KNO₃ + S +3 C →K₂S + N₂ + 3 CO₂. An incomplete reaction occurs when the oxygen is
Combustion is a rapid, continuous reaction that usually takes place in the gas phase. Wood is an organic compound primarily comprised of cellulose. For wood, the phase change from a solid to gas is almost instantaneous as combustion occurs (Coleman, et al. 95). Ignition occurs when an outside source is no longer needed to sustain combustion (Coleman, et al. 87).
3.Combustion: As the piston reaches the top of its stroke or TDC, the spark plug fires, igniting the mixture. Due to the high compression of this mixture it is very volatile and it explodes when the spark is introduced. This pushes the piston downward and produces power.
The Diesel engine, a compression ignition, internal combustion engine, was invented in 1893 by French inventor Rudolf Diesel. Diesel continued to developed his invention until 1897. “[his]... compression ignition engine could burn any fuel, the prototypes he built would run on peanut or vegetable oil–and needed no ignition system: It ignited by introducing fuel into a cylinder full of air that had been compressed to an extremely high pressure and was, therefore, extremely hot.” The Diesel engine impacted greatly on society in many ways, both good and bad.
Prior to the industrial revolution the levels of toxic chemicals in the air were low. After WWII and the rise in the popularization of cars air pollution spread to many major cities. In the 1940s citizens of LA began complaining about yellow-brown smog, composed of carbon monoxide, hydrocarbons, sulfur oxides and nitrogen oxides. Because LA was one of the first cities to experience the impacts of air pollution they were also the first city to raise public concern of car emissions. In 1947 coal and fuel oil was banned from industrial purposes, however smog continued to rise. By investigating the cause of smog even further scientists in LA discovered the main sources of smog were engine exhaust, engine ventilation, the carburetor and the fuel tank. These investigations directly led to the creation of technologies that controlled emissions. Over the next few decades laws were written with the aim of limiting emissions. In 1990 the Clean Air Amendments set strict standards for emissions. This new policy led to more interest in alternatives to the internal combustion engine such as electric powered vehicles or even
Nitrogen gas makes up about 78% of the air, and most of this gas just passes right through the car. Carbon dioxide is one of the products of combusion. The carbon in the fuel bonds with the oxygen in the air to form carbon dioxide. Water vapor is the other product of combusion. The hydrogen in the fuel bonds with the oxygen in the air to form water vapor. However, the combustion process is never perfect, so some smaller amounts of more harmful emissions are also produced in car engines. They include carbon monoxide, hydrocarbons or volatile organic compounds, and nitrogen oxides. These are the three main regulated emissions, and also the ones that catalytic converters are designed to reduce.
Automobiles are the cause of 60 percent of our air pollution today (Dewees 214). There are four main sources in which pollution comes from an automobile. The first, on a hot day the sun will heat the gas tank of the car, this in turn causes vapors from the gasoline to leak from the fuel tank. Second, when the car is simply running the engine becomes hot and causes the engine and exhaust system to release gasoline vapors. Third, after a car is turned off and parked, gasoline vapors continue to be emitted because the engine is still hot from running. And lastly, when you go to the gas station to refill your gas tank vapors are forced out of the tank into the air.
Diesel engines are an important component of society in how they are used efficiently and effectively. Diesel engines have been around since 1892 when inventor Rudolph Diesel was able to achieve his goal of developing an internal combustion engine that can achieve maximum efficiency as seen in the Carnot Theorem. The Carnot Theorem set the standard for determining the maximum
The invention of internal combustion engines in the early 19th century has led to the discovery of utilisation of cheap energy that is petroleum and this enabled the world to develop and progress into the modern world today. Humans were able to accomplish more work done with little manual labour, using internal combustion engines powered by fossil fuels. Internal combustion engine are mechanical power devices that convert heat energy to mechanical energy with the combustion process taking place in a system boundary (Rolle, 2005). Among the internal combustion engine invented in the 19th century were the Otto engine, Diesel engine and gas turbine engine. Gas turbine engine is one of the popular engines used today due to its high torque per weight ratio relative to other types of internal combustion engines. As explained by Cengel and Boles (2011), the gas turbine engine works on a 6 stages process, namely air intake, compression, fuel injection, combustion, expansion and exhaust (refer to Figure 1 in Appendix 1).
Central idea: The involvement of technology has change the Earth’s atmosphere, it is important to understand how can air pollution in the community, and how it involves with the emissions of vehicles.
Many hazardous pollutants escape from the internal combustion of the engine. Conventional gas powered vehicles use irreplaceable fossil fuels to run. When burned, these fossil fuels create numerous toxins like carbon dioxide (Larminie 246). Carbon dioxide is considered the main greenhouse gas that creates the foundation for global warming (hybridcars.com, pollutants). This harmful pollutant may not have a serious effect on people at first, but it does have consequential effects on the environment that in turn put people in danger (Nutramed.com). The major consequence caused by global warming is the rise in average temperature. This results in a domino...
Car pollutants cause immediate and long-term effects on the environment. Car exhausts emit a wide range of gases and solid matter, causing global warming, acid rain, and harming the environment and human health. Engine noise and fuel spills also cause pollution. Cars, trucks and other forms of transportation are the single largest contributor to air pollution in the United States, but car owners can reduce their vehicle's effects on the environment. Car pollution is one of the major causes of global warming. Cars and trucks emit carbon dioxide and other greenhouse gases, which contribute one-fifth of the United States' total global warming pollution. Greenhouse gases trap heat in the atmosphere, which causes worldwide temperatures to rise.
In my undergraduate years, I have acquired a strong background in the fundamentals of basic mechanical engineering, having studied subjects such as Strength of Materials, Thermodynamics, Fluid Mechanics, Heat and Mass Transfer, Design of Machine Elements and Automobile Engineering. Whilst pursuing my diploma & degree courses, my interest for Automotive Engineering grew even more having learnt more on the different types of internal combustion engines, their configuration and importance. However, what I lacked was a practical understanding on these core areas of Automotive Engineering. To gain a better understandi...
In addition to the concerns about car manufacturing and driving, we should also consider the impact of construction areas where new houses are being built, with many truck with loads going across the country. This is an important contribution to pollution, which creates both air and noise pollution. Japan and Europe auto manufacturing based in US has recently involved activities to improve fuel efficiency of their vehicles. The European car makers planned to design a new engine and at same time to develop long distance vehicles. The autos made in Europe, for example Daimler Chrysler, recently came out with a new product which is a vehicle with 3 liters per hour, and also a diesel engine, which consumes 3.4 liters of fuel per 100 With this new idea both the auto makers and their suppliers have created a centralized body of authority in order to promote this increasing environmental issue to all under the protection of USCAR (United states council for automobile research) and in addition (USAMPILCA)