What is the function of automobile engine rocker arm?

Introduce the combustible mixture (or fresh air) into the cylinder; Then, compress the combustible mixture (or fresh air) entering the cylinder, and ignite the combustible mixture when the compression is near the end point (or inject diesel into the cylinder under high pressure to form the combustible mixture and ignite it).
The combustible mixture ignites and burns, and the expansion pushes the piston downward to achieve external work; Finally, exhaust gas after combustion is discharged. That is, intake, compression, work and exhaust. It is also the power source of automobiles.
Maintenance of automobile engine:
1. Preheating
When the engine is cold started, lubricating oil such as parts will not quickly participate in the work. Instead, it should be preheated to allow the engine's lubricating system to unfold. After all parts are fully lubricated, they can be put on the road, which can effectively avoid wear and consumption of all parts of the engine.
2. Self inspection
The running parts of any car have their own unique sound, and the engine is no exception. When starting in a quiet state, the sound of the engine is usually dull and regular. If the engine sounds sharp or runs unsteadily, it may be that your engine has a fault, and you should send it to the 4S store for maintenance in time.
3. Using
Each gear has its own reasonable gear shifting speed when driving. Generally speaking, it is necessary to shift at this gear (except for special cases, of course). If you always drive at a high speed, it is easy to cause the burden of the engine. It will not only affect the fuel economy, but also cause the loss of engine parts. Generally speaking, it is common for novices. This should be noted.