30-12-2010, 04:56 PM
VASISTA B R
VASISTA COLLEGE PPT.ppt (Size: 4.47 MB / Downloads: 182)
INTRODUCTION
Powershot is a propane injection system for turbo diesel owners.
This system guarantees the ones who are looking for more power and mileage.
This system is unique from other propane injection systems in the market owing to it innovative and patented(invented) design.
This is an easy to installation system which will safely and substantially(solid) increase horse power upto 100hp and torque upto 250 ft lbs.
TURBOCHARGERS
Turbochargers allow the engine to burn more fuel and air by packing more into the existing cylinders.
The typical boost provided by a turbocharger is 6 to 8 pounds per square inch (psi).
You would expect to get 50 percent more power. It's not perfectly efficient, so you might get a 30- to 40-percent improvement instead.
TURBOCHARGERS
The turbocharger is bolted to the exhaust manifold(variety of quality) of the engine. The exhaust from the cylinders spins the turbine, which works like a gas turbine engine.
The turbine is connected by a shaft to the compressor, which is located between the air filter and the intake manifold. The compressor pressurizes the air going into the pistons.
The exhaust from the cylinders passes through the turbine blades, causing the turbine to spin. The more exhaust that goes through the blades, the faster they spin.
PROPANE FUMIGATION
Propane (LPG) Fumigation(purification) is the introduction of gaseous propane into the air intake of a diesel engine for the purposes of attaining more power, economy, or both.
The parallel is often made between fumigation and using Nitrous Oxide on gasoline vehicles to achieve a power increase.
This analogy is correct, although the properly implemented use of LPG on a diesel engine will actually result in a better-running engine without the possible damaging effects that N2O(Nitrous Oxide ) has on gas motors.
PROPANE FUMIGATION
Exhaust emissions are reduced as a result, with lower quantities of unburned hydrocarbons and fewer particulates (smoke)
LPG fumigation will even clean up the odor of diesel fuel in the exhaust, making the smell from the tailpipe of an engine utilizing it much less objectionable.
HOW PROPANE WORKS ?
Introducing LPG gas into the combustion air intake of a diesel engine acts as an accelerant, promoting and burning of the diesel and more combustion, resulting in more power being produced.
During the compression stroke, the air/LPG mixture is compressed and the temperature is raised to about 400˚C,which is not enough to ignite the LPG & has an ignition temperature about 500˚C.
When the diesel fuel is atomized into the cylinder under high pressure, it immediately self-ignites (diesel ignites at about 385˚C.), and causes the LPG to burn as well.
HOW PROPANE WORKS ?
Much of the clean burning of the fuel is attributed to this ignition against the "cooler" components of the engine and accounts to raise the percentage of combustion for a typical 75% used in well-tuned diesel engine running on pure diesel fuel alone, to 85-90% with the addition of LPG.
With a turbocharged engine the combustion is again increased to 95-99%.
This more complete combustion also gives a nice boost in power, with an accompanying increase in fuel economy and reduction of pollutants.
WHAT TO EXPECT ?
Normally-aspirated engines require different systems to introduce the gas than do turbocharged engines. The results are different as well.
Fuel economy is increased significantly. You can expect an increase of 2-3 mpg (3-4 km/l ) depending on your driving style.
Displacing 1% of the intake air with LPG will result in a small power increase, perhaps 5-8%.
Turbo engines are by design blessed with a lean air-to-fuel ratio, and can be fed concentrations of LPG upto 6-8% of the intake air volume.