What are the main components of an automobile engine?

Composition of automobile engine: 1. Crank connecting rod mechanism: crankshaft, engine crankshaft, piston pin, water pump flywheel, piston rod, engine piston, cylinder liner and crankshaft oil seal.

2. Valve mechanism: cylinder head, valve cover, engine camshaft, cylinder, intake branch pipe, exhaust manifold, air filter, muffler, three-way catalyst, supercharger, intercooler, etc.

3. Refrigeration system: generally composed of water storage tank, centrifugal pump, heat pipe radiator, fan, water temperature sensor, water temperature and drainage power switch; There are two kinds of refrigeration methods for automobile engines, air refrigeration and cooling water. At present, in China automobile mass market, cooling water is mostly used for engines. )

4. Lubrication system: The engine lubrication system consists of fuel injection pump, filter, oil filter element, main oil circuit, pressure reducing valve, automobile oil gauge, pressure sensitive plug and dipstick.

5. Fuel system: The fuel system of a gasoline engine consists of a fuel tank, a gasoline meter, a gasoline pipe, a gasoline filter, a gasoline pump, a carburetor, an air filter, an intake and exhaust manifold, etc.

6. Operating system: starter, starting motor and battery;

7. Ignition system: automobile spark plug, high-voltage wire, high-voltage coil and distributor.

Expansive material: Gas turbine is the main engine commonly used in automobiles. Its advantage is that the fuel is ignited in the cylinder, so that the heat energy generated by it is converted into mechanical kinetic energy, and the driving force is started to push the tire to rotate according to the rotating mechanism, so that the automobile can obtain the driving force for driving.

In the past, most cars used carburetor engines. It is based on carburetor, which mixes gasoline and air into engine cylinder and then ignites it by spark discharge to generate heat energy to do work.

Because this kind of engine has high fuel consumption, low efficiency and great environmental pollution, it has long been eliminated. Instead, it is a gasoline direct injection engine, which makes gasoline immediately injected into the cylinder and mixed with the air sucked into the cylinder, and then ignited by spark discharge to cause driving force.

Diesel engines generally use high-pressure diesel pumps (* * * rails). The fuel injection pump immediately injects gasoline into the combustion chamber of the engine and mixes it with the air reduced by long-term inhalation into the cylinder. When it catches fire at ultra-high pressure and high temperature, it generates heat energy to make the engine work.