Diesel engine.
Diesel cycle

Endothermic engine
Gearbox

Crank

Crankshaft definition

Crankshaft definition

The crank shaft is the force that makes the whole rod-crank crank. Its function is to transform rotational movements in alternative movements (combustion engines, for example) or vice versa (Eccentric mechanical presses).

In the heat engine crankshaft collects forces originated during the explosion and turns through the rod, linear motion into rotary motion of the piston alternative. Transmits the movement and the driving force transmission elements that are coupled. Is subjected to bending and torsion efforts, and has a strong structure and very resistant. The crankshafts, which can…

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Heat engine

Heat engine

Heat engines are a type of alternative engines. Actually, they are the most popular alternative engines.

This type of engine uses the thermal energy caused by the combustion of a fuel (usually gasoil or gasoline) to convert it into mechanical energy.

Heat Machines

The concept of a thermal engine is often confused with that of a thermal engine. These terms are related but not exactly the same. A thermal machine is a device or system that works by establishing exchanges of heat and work with its environment. To achieve this, the machine transforms a substance through a cyclic…

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Types of heat engines

Types of heat engines

The heat engines can be classified in many different ways. Then classify heat engines, taking into account six different aspects:

  • They Depending on where is combustion.
  • Depending on the fuel used and the type of lighting.
  • Depending on the movement of moving parts.
  • Depending on how realizes the cycle.
  • Depending on the number of cylinders
  • Depending on the arrangement of the cylinders
Types of heat engines depending on where combustion takes place

Depending on where combustion takes place two types:

Atkinson cycle

Atkinson cycle

The Atkinson cycle engine is a type of reciprocating internal combustion engine invented by James Atkinson in 1882. It is practically a common Otto cycle engine, but with a crank modified crank to obtain greater efficiency at the expense of a reduction in the power. The objective was to compete with the Otto cycle without infringing any patent.

In its original version, the Atkinson cycle requires a single rotation of the crankshaft to complete a cycle of operation, keeping the phases of the Otto cycle engine intact: intake, compression, expansion (useful phase) and discharge. However,…

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History of the alternative engine

History of the alternative engine

A first example of the history of the known from rotary to alternative movement is the crank mechanism. The oldest manual cranks appeared in China during the Han Dynasty (202 BC-220 AD). Several sawmills in Roman Asia and Byzantine Syria during the III-VI centuries AD had a connecting rod mechanism that converted the rotary motion of a water wheel into the linear movement of the saw blades. In 1206, the Arab engineer Al-Jazari invented a crankshaft.

Piston motor

A free piston engine is a linear internal combustion engine, in which the movement of the piston is not controlled…

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Types of steam engines

Types of steam engines

Steam engines are mechanical devices capable of transforming heat energy into mechanical energy in a rotating axis. This heat energy takes advantage of the energy contained in water vapor at high pressure and temperature.

We consider steam engines all those machines that transform the thermal energy of a fluid into mechanical energy. In general, the fluid must be pre-heated and at the outlet of the steam machine it must be cooled to repeat the process.

Steam machines can be classified into these two types:

  • Plunger steam engine
  • Turbine steam engine

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Diagram shown as a function of crank angle for a 2-stroke engine

The first figure shows a diagram of a typical indicated 2-stroke engine. We need not make a detailed description thereof will suffice to clarify some obscure points, examination of the corresponding path diagram as a function of angular displacement of the crank. This diagram illustrates the second figure.

Nor is there, in this case, correspondence between "time" and "race", for convenience of exposition we have matched the start of the two-stroke points that correspond, respectively, at the beginning of phase COMBUSTION , n at the start of the scanning phase.

A) First Half. Point…

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What is a piston?

What is a piston?

A piston is an element formed by two pieces: a piston that moves in a rectilinear alternative movement and a shirt or guide to which it moves. In principle, the piston has a cylindrical shape and is usually made of metal, although it could be of any material.

The guide is actually a cavity that can be integrated into a different part. It is part of the piston-crank-crank system that serves to transform rectilinear movements into rotary and vice versa.

Function of the piston in a thermal engine

In an automotive engine, the piston is traditionally called a cylinder. The cylinder,…

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Stirling Cycle

Stirling Cycle

The Stirling cycle is a thermodynamic cycle that describes the operation of a class of equipment (generating or operating machines). The cycle describes the original Stirling engine that was invented and patented in 1816 by the Reverend Robert Stirling, helped substantially by his brother engineer.

The Stirling engine is an external combustion engine. This characteristic differentiates it from other types of engines such as the otto engine or the diesel engine which are internal combustion engines. Both engines operate according to the otto cycle and the diesel cycle respectively.

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