File Name: advantages and disadvantages of 4 stroke engine .zip
Automotive engines have transformed over the years, but two main gasoline powered combustion engine designs remain: the 2-stroke and the 4-stroke. How do they work, and which is better? Read on to learn the answers! In order to understand how these two engines are different, you first need to become familiar with the basics. The Difference between a 2-stroke and a 4-stroke engine is how quickly this combustion cycle process occurs, based on the number of times the piston moves up and down during each cycle. In a 4-stroke engine, the piston completes 2-strokes during each revolution: one compression stroke and one exhaust stroke, each being followed by a return stroke.
We might like to give a thought on which is better one OR which has more advantages. Thanks for that, it was very informative. It would seem that both types of engine have inherent advantages and disadvantages when compared which one should take into consideration when selecting which engine is more suitable for a given task. The parts get lubricated when the fuel in gaseous form passes through crankcase! Vey well explained. You got in all the facts and you made it very simple to understand. Thansk you.
A two-stroke or two-cycle engine is a type of internal combustion engine that completes a power cycle with two strokes up and down movements of the piston during only one crankshaft revolution. This is in contrast to a " four-stroke engine ", which requires four strokes of the piston to complete a power cycle during two crankshaft revolutions. In a two-stroke engine, the end of the combustion stroke and the beginning of the compression stroke happen simultaneously, with the intake and exhaust or scavenging functions occurring at the same time. Two-stroke engines often have a high power-to-weight ratio , power being available in a narrow range of rotational speeds called the " power band ". Compared to four-stroke engines, two-stroke engines have a greatly reduced number of moving parts.
A four-stroke engine is an Internal combustion engine , where four successive strokes i. Suction-Compression-Power-Exhaust completes in two revolutions of the crankshaft. Therefore, the engine is called a Four-stroke engine. In recent days the majority of automobile runs on a four-stroke cycle. Basic some terms used in this article:.
Gasoline engine , any of a class of internal-combustion engines that generate power by burning a volatile liquid fuel gasoline or a gasoline mixture such as ethanol with ignition initiated by an electric spark. Gasoline engines can be built to meet the requirements of practically any conceivable power-plant application, the most important being passenger automobiles , small trucks and buses, general aviation aircraft , outboard and small inboard marine units, moderate-sized stationary pumping, lighting plants, machine tools, and power tools. Four-stroke gasoline engines power the vast majority of automobiles , light trucks , medium-to-large motorcycles , and lawn mowers. Two-stroke gasoline engines are less common, but they are used for small outboard marine engines and in many handheld landscaping tools such as chain saws, hedge trimmers, and leaf blowers. Gasoline engines can be grouped into a number of types depending on several criteria , including their application, method of fuel management, ignition, piston-and-cylinder or rotor arrangement, strokes per cycle, cooling system , and valve type and location. In this section they are described within the context of two basic engine types: piston-and-cylinder engines and rotary engines. In a piston-and-cylinder engine the pressure produced by combustion of gasoline creates a force on the head of a piston that moves the length of the cylinder in a reciprocating , or back-and-forth, motion.
Five-stroke engine is currently a concept engine invented by Gerhard Schmitz in Ilmor's prototype is an internal combustion engine uses a solid cylinder block with electric motors driving the oil and water cooling pumps. The prototype uses two overhead camshafts with standard poppet valves. The Five-stroke prototype engine is turbocharged. The goal of the five-stroke engine is to have higher efficiency with lower fuel use. To increase efficiency a secondary cylinder is added as an expansion processor to extract more energy from the fuel.
More torque :- In general, 4 stroke engines always make extra torque than 2 stroke engine at low RPM. Although 2 stroked ones give higher torque at higher RPM but it has a lot to do with fuel efficiency. More fuel efficiency :- 4 stroke engines have greater fuel efficiency than 2 stroke ones because fuel is consumed once every 4 strokes. More durability :- We all know that more the engine runs, quicker it wears out. No extra addition of oil :- Only the moving parts need lubrication intermediately.
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