Your cart is empty

Shop

Quantity: 0

Total: 0,00

0

Two-stroke engine

Two-stroke engine

A two-stroke engine is a type of internal combustion engine with a cycle of only two (power) strokes.

Physics

Keywords

internal combustion engine, two-stroke engine, engine, heat engine, cylinders, driven shaft, engine block, cylinder head, intake manifold, exhaust manifold, crankshaft, piston, spark plug, cylinder, intake, compression, carburetor, power stroke, lubricating oil, cycle, mixture, trabant, thermodynamics, physics

Related items

Scenes

  • - Exhaust gases are expelled through this part. In two-stroke engines gasoline is mixed with oil, which does not burn perfectly, therefore two-stroke engines emit more harmful materials than four-stroke engines.

  • - It ignites the mixture of air, gasoline and lubricating oil. The exploding mixture pushes the piston back.
  • - When the piston moves downwards the pressure underneath increases, while above the piston it decreases. This forces the mixture of gasoline, oil and air into the cylinder through the transfer port.
  • - Exhaust gases are expelled through this part. In two-stroke engines gasoline is mixed with oil, which does not burn perfectly, therefore two-stroke engines emit more harmful materials than four-stroke engines.

  • gasoline tank - The fuel used in two-stroke engines is gasoline mixed with lubricating oil. The function of lubricating oil is to reduce the friction of cylinders and valves. An important attribute of gasoline is the octane number. The higher the number, the higher its flash point is, therefore it can be compressed more, resulting in greater efficiency.
  • - Exhaust gases are expelled through this part. In two-stroke engines gasoline is mixed with oil, which does not burn perfectly, therefore two-stroke engines emit more harmful materials than four-stroke engines.

  • - It ignites the mixture of air, gasoline and lubricating oil. The exploding mixture pushes the piston back.

Narration

We know that cars are powered by engines, but how does this work? The rotating motion of an engine’s crankshaft is transmitted to the wheels by the drive shaft. The gearbox changes the number of rotations of the wheels during one turn of the crankshaft. In low gear the output of the engine is high, but the speed is low; in high gear, the car is faster and uses less fuel but accelerates more slowly.

Cars in the past were often equipped with two-stroke engines, but today four-stroke engines have generally marginalized them. The fuel used in two-stroke engines is petrol mixed with lubricating oil. The function of lubricating oil is to reduce the friction of the cylinders and the valves.

The alternating vertical motion of the piston is converted into the rotation of the crankshaft, which drives the drive shaft and the camshaft by means of the timing belt. The camshaft operates the valves, which ensure fuel intake and the emission of exhaust gases through a coordinated, rhythmic opening and closing.

During the first stroke in the operation of two-stroke engines, the piston moves upwards, decreasing the pressure underneath. The intake valve opens and a mixture of air, fuel and lubricating oil flows from the carburetor into the cylinder. The piston compresses the mixture, thereby increasing the temperature.

During the second stroke the spark plug ignites the hot mixture. The explosion pushes the piston downwards in the cylinder, and the high-pressure combustion products are emitted through the exhaust port. The pressure under the piston increases, forcing the mixture into the cylinder through the transfer port.

As you can see, the linear motion of the piston is converted into the rotating motion of the crankshaft in the engine. The energy necessary to move the piston is provided by the combustion of fuel.

Related items

Diesel engine

The German engineer Rudolf Diesel patented the diesel engine in 1893.

Four-stroke Otto engine

This animation demonstrates the type of engine most commonly used in cars.

Radial engine

Radial engines are used primarily in airplanes and helicopters.

Stirling engine - hot-air engine

Stirling engines are also known as external combustion engines. Unlike internal combustion engines (e.g. Otto-engine), here combustion takes place outside...

Wankel engine

A type of rotary engine of high efficiency

DC motor

DC motors consist of a permanent magnet and a coil within the magnet, with electric current flowing in it.

Hero’s aeolipile

Hero of Alexandria is the inventor of the first steam engine, although he regarded it as an entertaining toy.

How does it work? - Differential gear

A differential allows the driven wheels of a car to rotate at different speeds when the car is turning.

How does it work? - Gearbox

In transmission systems, the engine torque is modified by reducing or increasing rotational speed.

Motorcycle

This animation demonstrates the construction of motorcycles.

Oil platform

A long pipe in the center of the tower penetrates the ocean bed until it reaches the layer that contains oil.

Watt´s steam engine (18th century)

The steam engine, perfected by the Scottish engineer James Watt, revolutionized technology.

Operation of oil wells

Machinery that pumps crude oil to the surface

p-V-T diagram for ideal gases

The relationship between the pressure, volume and temperature of ideal gases is described by the gas laws.

Construction of cars

This animations demonstrates the exterior and interior construction of cars, as well as their operation.

Environmentally friendly vehicles

Combining a conventional internal combustion engine propulsion system with an electric propulsion system reduces emission.

Ford Model T

The popular model of the American automobile factory was the first mass-produced car in the world.

Added to your cart.