2 Stroke Engines
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Two stroke engines complete the intake, compression, power, and exhaust strokes in one revolution of the crankshaft, using the crankcase as a pumping device. They are lighter and simpler than four stroke engines but are less efficient and more polluting. Common applications of two stroke engines include dirt bikes, lawnmowers, outboard engines, chain saws, jet skis, and snowmobiles.
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2 stroke
This presentation discusses the two-stroke engine. A two-stroke engine completes the combustion process in one crankshaft revolution, obtaining one power stroke per revolution. It has fewer parts than a four-stroke engine and is lighter in weight. The basic parts are the piston, piston ring, spark plug, connecting rod, and crankshaft. The working principle is that the intake and exhaust are controlled by piston movement, with the fresh charge entering due to pressure differences and being compressed by the pumping action of the piston. Applications include dirt bikes, lawn mowers, outboard engines, and others.
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Piston-engine power plants have been used since the early 18th century and include diesel, gas, and dual-fuel engines. They vary in size from less than 1 kW to 65 MW. Larger, slower engines are more efficient but high-speed engines are used for backup power. Combined heat and power systems can achieve over 75% overall efficiency. Diesel engines are commonly used for power generation due to their high efficiency but produce more emissions than gas engines.
Introduction to i c engine
The document provides an overview of internal combustion engines. It discusses the classification of I.C. engines based on fuel type, thermodynamic cycle, number of strokes, ignition method, cooling method, and cylinder configuration. It also describes the basic components and workings of 4-stroke petrol and diesel engines, as well as 2-stroke engines. The key differences between petrol and diesel engines, and between 2-stroke and 4-stroke engines are outlined.
Advancement of IC engine
The document discusses the advancement of internal combustion engines. It covers topics like the classification of IC engines based on combustion and strokes. Major areas of advancement discussed include engine design, material selection, timing controls, fuels and fuel injection systems, and pollution control. Some specific technologies covered are variable valve timing, direct injection, superchargers, turbochargers, six-stroke engines, and methods to reduce air pollution from engines like catalytic converters. The goals of engine advancement are listed as higher power, better fuel efficiency, lower emissions and weight.
Mechanical technology lab report
this lab report include details and demonstrations about internal combustion ( IC) engine. its types like CI and SI engines, different parts of engine, 2 stroke and 4 stroke engine. The ignition system of engine, cooling system of Engine and lubricating system of Engine in detail.
Basic of engine
introduction
engine terminology
otto and diesel cycle
four stroke and two stroke
efficiency
fuel calculation
marine ic engine
bikeenginesclassification-techinicalknowledgebjseries-170714072206 (1).docx
This document discusses different types of engines used in two-wheelers. It describes two-stroke and four-stroke engines, explaining that two-stroke engines combine the intake, compression, power and exhaust strokes in two piston strokes, while four-stroke engines separate these strokes across four piston strokes. It also discusses other engine types and components such as single overhead camshaft (SOHC) and double overhead camshaft (DOHC), bore and stroke measurements, compression ratio, torque and power output, spark plugs, valves, and cooling systems.
presention-150806044916-lva1-app6891.pdf
The document provides an overview of internal combustion engines, including:
- Common engine classifications such as two-stroke vs four-stroke engines and differences between petrol and diesel engines.
- Explanations of engine terminology like compression ratio, swept volume, indicated power, brake power, and thermal efficiency.
- Descriptions of the Otto and diesel thermodynamic cycles that spark ignition and compression ignition engines are based on.
- Comparisons of key engine parameters and how they relate to performance metrics like power, torque, and fuel consumption.
Stirlingengine
The document provides instructions for building a simple two-cylinder Stirling engine made from two cans of water. Stirling engines are external combustion engines that use heat from an external source to power the engine. This engine uses the temperature difference between hot and cold water in the two cans to create pressure differences that drive pistons and mechanical linkages, powering the engine. The engine operates based on the four step Stirling thermodynamic cycle of compression, heating, expansion, and cooling using air as the working fluid.
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2 Stroke Engines
- 1. 2 Stroke Engines Jesse Sopko TED 346 Dr. Kallis
- 2. Facts 2 Strokes per cycle of the engine Intake and exhaust are performed simultaneously Intake occurs at the end of the power stroke Invented by Dugald Clerk in 1881 Fires on every revolution of the crank shaft Light weight and simple
- 3. Positives and Negatives Positive Negative Light Weight Simple More powerful than four stroke engines of equivalent size High power to weight ratio Inefficient Terrible polluter Large amount of unused fuel is expelled
- 4. How it works Intake: Fuel and air mix is drawn into the crank case by vacuum and then into the cylinder. Compression: Fuel air mix is then compresses inside the cylinder. Power: Fuel air mix is ignited forcing the piston down exposing the exhaust port. Exhaust: The exhaust gases are forced out by the incoming fuel air mix.
- 5. Examples Dirt Bike Lawn mowers Outboard engines Chain saws Line Trimmers Jet Skis Snowmobiles Model Air Planes Light Motorcycles Go carts Ultra lights Scooters
- 6. Question Where have you used a two stroke engine before?