内燃机车结构详解（detailed description of diesel otive structure）.doc

内燃机车结构详解(Detailed description of diesel otive structure)
There are two main types of modern bustion engines, one pression ignition (diesel engine), and the other is spark ignition (gasoline engine). What we're going to talk about here is gasoline engines.
For an bustion engine, the mixture of air and fuel is sucked into the cylinder pressed in the cylinder. When the mixture pressed, the molecule is forced into a very small space. This causes the molecules to collide with each other, creating friction and heat. The molecular chain of the fuel molecule is made up of different atoms, and bination of these different atoms requires energy. In order to release fuel energy, the fuel molecules have to split up and re form a different structure of low energy molecules. Once the fuel molecules are split, the energy bines the different atoms is no longer needed. This released energy provides power for the bustion engine.
For gasoline engines, compression alone does not provide enough energy to split fuel molecules. The heat energy that passes into the fuel molecule makes it unstable, but more force is needed to separate the fuel molecule from the atom. It's not easy to separate two people who are struggling together. To pull them apart, you're using more power than they're twisting together. An electric shock gun can separate two people who wrestle together, because the discharge voltage is 100kV when the electric gun discharges. The potential energy of an electric shock gun is greater than the energy used by two people
grappling with each other, so the two men will let go and separate. Even though the presses heat, it takes more power to split the fuel molecules and release the energy. The high energy spark produced by the ignition system can provide this force.
Ignition of gas mixture requires high energy electrical spark, so many different ignition systems are adopted. Step-up transformer is one of the mon ignition systems. The transformer uses electrodes with low vol