Surfaces in contact and relative motion
Diagram of an engine using pressurized lubrication
Wikimedia Commons has media related to Internal combustion piston engine lubrication systems.
Surfaces in contact and relative motion to other surfaces require lubrication to reduce wear, noise and increase efficiency by reducing the power wasting in overcoming friction, or to make the mechanism work at all. At the very least, an engine requires lubrication in the following parts:
Between pistons and cylinders
Big end bearings
Valve gear (The following elements may not be present):
Timing chain or gears. Toothed belts do not require lubrication.
There is no doubt that the most popular is the driving enabling management of passenger cars. Today, few who do not already have such a document. But there are many other categories of driving licenses, which entitle to drive other vehicles. Such courses are also conducted in the centers involved in the training of drivers of passenger cars. Why go for a license in a different category? Primarily related to an increase in opportunities. Those fascinated by motorcycles are not allowed to drive them without holding a driving license in the category. The same is true for buses and big trucks and other vehicles.
Handwritten improving car
Much of the information on how to quickly and easily improve the car, gives us the Internet. More and more often, to perform apparently really difficult operations, we do not need any complicated instrumentation, and a lot of ideas not have thought even if it was not a hint from the creators of such creative advice. Interestingly, many of them takes the form of instructional cutscene, making their own eyes, we can see that the presented method regarding clean inaccessible surface or mount useful gadget. Certainly it will convince many a wary viewer that such solutions really apply.