IC engine and diesel engine?
Answers:
An internal combustion engine burns gasoline which is ignited a spark plugs on the POWER stroke of the four strokes. On a diesel engine, the POWER stroke is initiated by the incoming charge of diesel fuel, into the combustion chamber where HIGHLY compressed air is ignited. Diesel engnes have much higher compression ratios usually about 18:1. Whereas gasoline engines have compression ratios of around 8 or 9:1.
Diesel is an IC engine (Ignition Compression). The compression of the fuel/air mixture ignites the mixture, as opposed to a spark-ignition engine that relies on a sparking plug.
Diesel is produced from petroleum, and is sometimes called petrodiesel when there is a need to distinguish it from diesel obtained from other sources such as (biodiesel). It is a hydrocarbon mixture, obtained in the fractional distillation of crude oil between 250 °C and 350 °C at atmospheric pressure.
The density of diesel is about 850 grams per liter whereas petrol has a density of about 720 g/l, about 15% less. When burnt, diesel typically releases about 40.9 megajoules (MJ) per liter, whereas petrol releases 34.8 MJ/L, also about 15% less. Diesel is generally simpler to refine than petrol and often costs less (although price fluctuations sometimes mean that the inverse is true; for example, the cost of diesel traditionally rises during colder months as demand for heating oil, which is refined much the same way, rises).
Diesel powered cars generally have greater fuel economy than gasoline powered cars, which is due to the greater energy content of diesel fuel and also the intrinsic efficiency of the diesel engine. That translates commonly in a 40% better milage than equivalent gasoline engines [1]. Proponents of diesel powered automobiles often cite this advantage as a way to reduce Greenhouse gas emissions. While diesel's 15% higher volumetric energy density results in 15% higher greenhouse gas emissions per liter compared to gasoline, it's the 40% better fuel economy that the modern diesel's car have that offsets the emissions of greenhouse gases, resulting in less CO2 emission per mile.
Also, diesel fuel often contains higher quantities of sulphur. European emission standards and preferential taxation have forced oil refineries to dramatically reduce the level of sulphur in diesel fuels. In contrast, the United States has long had "dirtier" diesel, although more stringent emission standards have been adopted with the transition to ultra-low sulphur diesel (ULSD) starting in 2006 and becoming mandatory on June 1, 2010 (see also diesel exhaust). U.S. diesel fuel typically also has a lower cetane number (a measure of ignition quality) than European diesel, resulting in worse cold weather performance and some increase in emissions. High levels of sulphur in diesel are harmful for the environment. It prevents the use of catalytic diesel particulate filters to control diesel particulate emissions, as well as more advanced technologies, such as nitrogen oxide (NOx) adsorbers (still under development), to reduce emissions. However, lowering sulphur also reduces the lubricity of the fuel, meaning that additives must be put into the fuel to help lubricate engines. Biodiesel is an effective lubricant.
Both are internal comustion ,IC, engines. A diesel is called a compression ignition engine because it relies on the compressed air being hot enough to ignite diesel fuel, heavy oil. Petrol has a much higher flash point and has to be ignited by a spark.
IC is ignition compressed
An IC engine is an "Internal Combustion" engine.
This means the combusiton of the fuel takes place inside the cylinders of the engine. The common type are spark-ignition (petrol, CNG, LPG, Ethanol) or compression-ignition (diesel).
Therefore there are no differences - a diesel is a type of IC engine.
The key differences between a diesel and petrol engine are as follows:
The diesel has no spark plugs, but a much higher compression ratio. The fuel is ignited by the increase in temperature caused by the compression of air inside the cylinder.
In a petrol engine the compression ratio is much lower, and the fuel is ignited by a spark from the spark plug.
See http://auto.howstuffworks.com/diesel.htm.
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