Mechanical Engineering

In fact, most modern engine control systems, s are digital. A typical engine control system incorporates a microprocessor and is essentially a special-purpose computer (or microcontroller). Electronic engine control has evolved from a relatively rudimentary fuel control system employing discrete analog components to the highly precise fuel and ignition control through 32-bit (sometimesmore) microprocessorbased integrated […]

Diesel and spark ignition engine produce the same emissions. On the other hand, owing to the low volatility of diesel fuel relative to that of gasoline and the fact that carburettors are not employed, evaporative emissions are not so significant. Crankcase emissions, too, are of less importance, since only pure air is compressed in the

The basic steps of starting system troubleshooting should be followed here and as always start with the following. Verify the Complaint T he two most common problems you will hear about with a starting system are no cranking and slow cranking. To some operators, not starting means not cranking, and in any case, where there’s

A functional machine needs a running engine, and if the engine doesn’t crank, it doesn’t start. A properly operating and reliable diesel engine starting systems are a must for keeping a machine productive.For many years, diesel engines have mostly used electric motors to crank them over to start the combustion process. For some applications, an

measurement of rotational speed of the dynamometer is measured either by a system using a toothed wheel and a pulse sensor within its associated electronics and display or, more recently, by use of an optical encoder system. While the pulse pick-up system is robust and, providing the wheel to transducer gap is correctly set and

The pros and cons of petrol and C.I. engines are now considered so what is comparison between si and ci engine. Fuel economy The chief comparison to be made between the two types of engine is how effectively each engine can convert the liquid fuel into work energy. Different engines are compared by their thermal

The pump scavenge two-stroke-cycle engine designed by Sir Dugald Clerk in 1879 was the first successful twos troke engine; thus the two stroke diesel engine is sometimes called the Clerk engine. Uniflow scavenging took place – fresh charge entering the combustion chamber above the piston while the exhaust outflow occurred through ports uncovered by the

4 stroke engine cycle is an internal combustion engine that utilizes four distinct piston strokes (intake, compression, power, and exhaust) to complete one operating cycle. Compression-ignition (C.I.) engines burn fuel oil which is injected into the combustion chamber when the air charge is fully compressed. Burning occurs when the compression temperature of the air is

The following remarks compare the main points regarding what is the difference between 2 stroke and 4 stroke of both engine cycles. a) The two-stroke engine completes one cycle of events for every revolution of the crankshaft, compared with the two revolutions required for thefour-stroke engine cycle. b) Theoretically, the two-stroke engine should develop twice

Positive Crankcase Ventilation is a system that was developed to remove harmful vapors from the engine and to prevent those vapors from being expelled into the atmosphere. The PCV system does this by using manifold vacuum to draw vapors from the crankcase into the intake manifold. Vapor is then carried with the fuel/air mixture into