What is the difference between a heat engine and an internal combustion engine!

1. Nature. Heat engine refers to various machinery that uses internal energy to do work, which converts the chemical energy of fuel into internal energy and then into mechanical energy.

A class of machines that power machinery, such as steam engines.

Steam turbines, gas turbines.

Internal combustion engines, jet engines.

The internal combustion engine is a kind of power machinery, which is a heat engine that burns fuel inside the machine and converts the heat energy released from it directly into power. The internal combustion engine is a type of heat engine.

2. Features. Heat engine: Usually gas is used as the working fluid (the medium substance for energy transfer is called working fluid), and the gas is used to expand by heating to do external work. The main types of thermal energy are thermal energy and atomic energy generated by fuel combustion.

solar and geothermal, etc.

Internal Combustion Engine: An engine is a complex machine that consists of many mechanisms and systems. Whether it's a gasoline engine.

Or diesel; Whether it's a four-stroke engine or a two-stroke engine; Whether it's a single-cylinder engine, or a multi-cylinder engine.

3. Work process.

Heat engine: To make the gasoline engine work continuously, the piston must return to its original position after pushing the crankshaft in order to push the crankshaft again, which requires the piston to be able to reciprocate in the cylinder. The movement of the piston from one end of the cylinder to the other end of the cylinder in reciprocating motion is called a stroke.

Internal combustion engine: It can be divided into four-stroke internal combustion engines according to the number of strokes required to complete a working cycle.

and two-stroke internal combustion engines. The internal combustion engine that rotates the crankshaft twice (720°), the piston reciprocates up and down in the cylinder for four strokes, and completes a working cycle is called a four-stroke internal combustion engine; The crankshaft is rotated once (360°), and the piston reciprocates up and down in the cylinder for two strokes.

Encyclopedia - Heat Engine.

Encyclopedia - Internal Combustion Engine.

The principle of heat engine is a type of machine power machinery that converts the chemical energy of fuel into internal energy and then into mechanical energy, such as steam engines, steam turbines, gas turbines, internal combustion engines, jet engines, etc. Heat engine: Usually gas is used as the working fluid (the medium substance for energy transfer is called working fluid), and the gas is used to expand by heating to do external work. The main types of thermal energy include thermal energy generated by fuel combustion, atomic energy, solar energy and geothermal.

Heat engines play an important role in human life. Modern means of transport are powered by it. The application and development of heat engines have promoted the rapid development of society, but also inevitably lost part of the energy and caused a certain degree of pollution to the environment.

A heat engine is a machine that uses internal energy to do work.

The working principle of the heat engine: from internal energy to mechanical energy through workmanship. (For example, when alcohol is burned, chemical energy is converted into internal energy, heat is transferred to water, water boiling pushes the cork out, and part of the internal energy of the water vapor is converted into mechanical energy of the cork.) ）

The four strokes of the heat engine: suction stroke, compression stroke, power stroke, exhaust stroke.

A four-stroke is two turnovers, that is, one work is suction, and one time is to consume 1 cylinder of oil.

History of the development of heat engines:

Steam engine, steam turbine, internal combustion engine, jet engine, rocket engine.

There are many types of heat engines, which are divided into internal combustion engines and external combustion engines according to the way the working fluid accepts the energy released by the fuel.

The internal combustion engine is a kind of power machinery, which is a heat engine that burns fuel inside the machine and converts the heat energy released from it directly into power. In a broad sense, internal combustion engines include not only reciprocating piston internal combustion engines, rotary piston engines and free piston engines, but also gas turbines and jet engines with rotating impellers, but the internal combustion engine usually refers to the piston internal combustion engine. In the past, the resurrection piston type of piston internal combustion engine was the most common.

A piston internal combustion engine mixes fuel and air and burns it in its cylinders, releasing heat energy that produces high-temperature and high-pressure gas in the cylinders. The gas expansion pushes the piston to do work, and then outputs the mechanical work through the crank connecting rod mechanism or other mechanisms to drive the driven machinery to work.

The common ones are diesel engines and gasoline engines, which change the internal energy by doing work by converting the internal energy into mechanical energy.

It's hard to say the difference.

However, the internal combustion engine is a type of heat engine, you should know it.

You can look at the specific concepts and look at the examples given in the textbooks.

However, I feel that there is less content about this aspect in the exam, but it is always possible to know more about it.

A heat engine is a machine that converts other energy (like chemical energy, atomic energy) into thermal energy and then into mechanical energy. Whereas.

An internal combustion engine is a type of heat engine.

Any machine that can use the energy released when fuel is burned to do mechanical work is called a heat engine. History of the development of heat engines:

Steam engine, steam turbine, internal combustion engine, jet engine, rocket engine.

Internal Combustion Engine: A heat engine in which fuel is burned in a cylinder.

The most common internal combustion engines, fueled by gasoline or diesel, are called gasoline engines and diesel engines, respectively.

So the internal combustion engine is a type of heat engine.

An internal combustion engine is a type of heat engine.

Heat engines are divided into internal combustion engines and external combustion engines according to the way in which the working fluid accepts the energy released by the fuel.

An internal combustion engine is a type of heat engine.

Gasoline engines, diesel engines, and turbines are called internal combustion engines; A steam engine is not an internal combustion engine.