A Report On Homogeneous Charge Compression Ignition

After many years of trial and error, a combination of inventors and engineers developed a practical, effective internal combustion engine that greatly affected the world. This paper will give opposing views on the background and analyze the effects it had on transportation and the environment.

Furthermore, the combustion of propane is considered spontaneous because its ΔH is negative and its ΔS is positive. The enthalpy of the reaction is negative, since the heat is on the product side of the balanced chemical equation for the combustion of propane, C3H8(g) + 5O2(g) 3CO2(g) + 4H2O(l)+ heat. In addition, the entropy of the reaction is positive, which means it increases in disorder, because the number of gaseous particles on the product side is greater than the number of gaseous particles on the reactant side. Therefore, a process is spontaneous if its enthalpy is negative and its entropy is positive, which in this case proves that the combustion of propane is spontaneous since it satisfies both of these requirements.

Spontaneous combustion An occurrence where a material self-heats to its piloted ignition temperature, then ignites.

The common problem which researcher’s faced was, they directly supplied the HHO gas in the carburetor. This HHO gas enters the carburetor at a certain temperature and with some traces of water in form of vapors. Both the outcome can be easily controlled by a simple unit. These problems are caused by the heat generation due to reaction happening through the electrolysis process inside the container. Some researchers have sprayed water to control the pre-ignition but eventually was in vain.

An automotive engine extracts work from its chemical fuel by burning that fuel inside its cylinders and making the resulting burned gas do work on the engine. Most engines have at least four cylinders, each of which requires four strokes of the piston to extract work from the fuel. During the induction stroke, a piston moves out of the cylinder and the fuel and air enter it. During the compression stroke, the piston moves into the cylinder, compressing this fuel-air mixture to high density, pressure and temperature. An electric spark then ignites the mixture and converts it into extremely hot burned gas. During the power stroke, the piston again moves out of the cylinder while the hot gas does work on it. This work is what powers the car. Finally, during the exhaust stroke, the piston moves into the cylinder and

The first set of pistons compress, causing a sudden increase in pressure to make the fuel combust with the air, generating a small explosions, pushing the

In the automotive world, efficiency and power are two elements of vehicle performance metrics that while important to many consumers and critics alike, appear to be elusive when in convolution with one another. In automotive history, good fuel efficiency equaled compromises in power and performance and vehicles with large displacements and torque usually had worse gas mileage. The exception to this rule were diesel engines, which managed to combine better efficiency than many four-cylinder gas engines while providing very high torque number for better performance. The main drawback that diesel’s faced was due to their stigma of being dirty, as they emitted more greenhouse gases including nitrous and sulfur oxides. Coupled with the stricter emissions that many states began to implement, primarily overseen by the EPA, it became harder for car manufactures to certify diesel engines for emissions while maintaining high fuel economy and power output figures. The emission control hardware and software in diesel vehicles also came at a high price and with increased complexity, both unwelcoming additions for any car company wanting to mainstream diesel’s.

In the condition of the fuel injection timing θinj=-5deg.CA ATDC, the maximum value of the heat release rate tended to increase slightly as the dissolved pressure increased. In addition, the inclination of the cumulative heat release amount showed a tendency to increase. This promotes atomization of the fuel spray by the effervescent effect of CO2 gas, and a lean and uniform mixture is formed at an early stage. Therefore, it is considered that the combustion has progressed

Methanol as a biofuel is an environmental friendly substitute to pure diesel and can be obtained from biomasses. Use of biofuels such as methanol for combustion process is associated with positive environmental impacts. Using pure methanol or blended with diesel fuel in automotive has been proposed by researchers. In this paper, methanol was injected into combustion chamber of a ISM 370 HD diesel engine and exhaust emissions of this engine which took advantage of pure methanol were evaluated by using AVL FIRE CFD code software at four engine speeds (1200, 1400, 1600 and 1800 rpm). Additionally, influences of EGR mass fraction and various injection timings were investigated. For validation of simulation, in-cylinder mean pressure and rate of

I will describe in my own terms how gasoline is used to power the average automobile within an internal combustion engine. I will describe this process from the perspective of thermodynamics. The reason I feel this an interesting topic is the automobile has become such a steady presence in the daily life of society over the past century that we often take for granted the amount of science and engineering that go into them. The thermodynamics involved are a direct daily application of the topics we covered in this course, it also applies concepts we learn in other courses. It’s also an important discussion, because what makes gasoline the most common fuel, how do the alternatives stack up? Or should we look at engines that

Combustion is a complex chemical process in which a substance reacts rapidly with oxygen accompanied by the production of heat. (Grc.nasa.gov, 2015). The original substance is called the fuel and the oxygen is called the oxidizer. Along with heat, CO2 (carbon dioxide) and H2O (water) are created as byproducts of the exothermic reaction. ( E-inst.com 2015).

The automobile industry is constantly being revolutionized through new technology resulting in a fuel concept for consumer vehicles. Although these new alternative fuels are a break-through for the automobile industry, where do they stand in comparison to our conventional vehicles? This paper will address this issue by asking: What are the environmental and economic benefits and disadvantages of alternative-fueled cars compared to conventional cars?

Charcoal is the most commonly used fuel in fireworks. The fuel loses electrons (a negatively charged subatomic particle.) to atoms within the oxidiser. During this process, bonds are formed between the fuel and oxygen atoms forming a stable product. A small amount of energy is required to start combustion of this fuel-oxidiser compound. When combustion starts, the result is a release of energy

Engineering: [a] diesel engine is an internal combustion engine in which the chemical energy of fuel is transformed into thermal energy of the cylinder charge, in consequence of the self-ignition and combustion of fuel in the engine cylinder after compression of the air charge in the cylinder (p1

One of the most debated subjects in today’s society is the growing concern over global warming. This concern is derived from the increase in global pollution from many aspects but in particular greenhouse gasses. This increase in pollution is attributed to a growing population that is more dependent on modern commodities. Of these commodities one of the greatest contributors to this cycle are motor vehicles. Because of the growing concern over the environmental effects of cars, manufacturers have began to develop new vehicle types in order to reduce the amount of pollution emitted through carbon emissions. Some of the options available now being produced by