C And C Complete Diesel (2024)

FAQs

What burns diesel in CI engine? ›

In CI engine the fuel is injected into combustion space after the compression of air is completed. Due to excessively high temperature and pressure of air the fuel when injected in atomised form gets burnt on its' own and burning of fuel is continued till the fuel is injected.

Complete combustion looks like this: C13H28 + O2 = CO2 + H20 (diesel + oxygen = carbon dioxide and water). In the real world, the reaction of diesel combustion is much more messy.

A higher air intake pressure is required to increase air density in allowing for better combustion within a limited time to improve fuel economy, power output and exhaust emissions.

Obtained results showed that the pilot injection mode with 30 % PQ reduced nitrogen oxide (NO) emission as well as brake specific fuel consumption (BSFC) by 21.87 % and 1.46 % respectively compared to reference single injection mode while smoke emissions were increased by 77.64 %.

Using petrol in a diesel engine is a much more serious problem and could result in expensive and potentially permanent damage to your engine. Petrol will increase the friction between the various parts of your engine – unlike diesel which is a more lubricating fuel – and this is what will cause damage.

Solution: The best fuel for CI engines is straight-chain paraffin, while aromatics are the worst. Aromatics are the best fuel for SI engines, whereas paraffin is the worst.

Incomplete combustion occurs and soot is formed when there is an overabundance of fuel (both diesel fuel and lube oil), insufficient residence time in the combustion zone, and/or non-availability of sufficient oxidants. Over-fueling is the primary cause of black smoke from the exhaust of a heavy duty diesel engine.

Abnormal combustion in engines can occur through pre-ignition, detonation, or knocking. Pre-ignition occurs when the fuel-air mixture ignites before the spark plug fires, often due to hot surfaces in the combustion chamber. Detonation involves spontaneous ignition of the end-gas mixture after normal ignition.

Diesel engines are sometimes called compression-ignition engines because initiation of combustion relies on air heated by compression rather than on an electric spark. In a diesel engine, fuel is introduced as the piston approaches the top dead centre of its stroke.

You can pack more air into a given space if you push it in with a turbo, supercharger, or ram-air system. But pressure alone does not make power. It's the relationship between the two variables-temperature and pressure-that determines air density. Logically, as temperature goes down, density increases.

What happens to engine performance with a decrease in air density? ›

Whether due to high altitude, high temperature, or both, reduced air density (reported in terms of density altitude) adversely affects aerodynamic performance and decreases the engine's horsepower output. Takeoff distance, power available (in normally aspirated engines), and climb rate are all adversely affected.

More dense, or “heavier” air will slow down objects moving through it more because the object has to, in effect, shove aside more or heavier molecules. Such air resistance is called “drag,” which increases with air density.

Numerous studies have compared the emissions of E85 and gasoline. E85 decreases the emissions of CO₂, as well as the emissions of many harmful toxics, such as benzene—a known carcinogen.

Generally, diesel engines operate well with a CN from 48 to 50. Fuels with lower cetane number have longer ignition delays, requiring more time for the fuel combustion process to be completed.

In the compression stroke, the inlet and exhaust ports are closed, and the cylinder charge is compressed, drawing fresh air into the crankcase. The piston moves toward TDC, compressing the mixture and then combustion is started.

In a compression-ignited system, the diesel fuel is injected into the combustion chamber of the engine and ignited by the high temperatures achieved when the gas is compressed by the engine piston.

A diesel engine takes air, compresses it, and then injects fuel into the compressed air. The heat of the compressed air ignites the fuel spontaneously. A diesel engine does not contain a spark plug.

Biodiesel is a type of alternative fuel that can power the same compression-ignition engines as regular petroleum-based diesel. Vegetable oils, animal fats and even restaurant grease can be used to produce biodiesel.