Valves and seats

Valves are used to control gas flow to and from cylinders in automotive internal combustion engines. The most common type of valve used is the poppet valve. The valve itself consists of a disc-shaped head having a stem extending from its centre at one side.

The edge of the head on the side nearest the stem is accurately ground at an angle – usually 45 degrees, but sometimes 30 degrees, to form the seating face. When the valve is closed, the face is pressed in contact with a similarly ground seat. It is the contact conditions and loading at this interface that will have the largest influence on the rate at which valve and seat wear will occur, so understanding these is a key in determining the mechanisms that cause valve recession.

READ MORE.......

for more details and updates about automotive-technology please visit.........

www.automotive-technology-guide.blogspot.com

---or---

www.automotive-technology-guide.com

Read More

As a result of hastily rushed off the engine

And these bad habits have a negative impact on future

One of the bad habits of the driver is in a hurry turn off your vehicle engine when parked. And these bad habits have negatively impacted in the future. Consider the following description:

* When turning off the engine do not directly contact to the off position and menggeber gas-Geber. It is very influential in the engine lubrication. At high rotation engines require better lubrication. But because it is directly switched off although there was still some oil on the bore wall (cylinder houses), lubrication is reduced. If the machine will often be worn or broken.

* The machine is turned off immediately after lauched at high speeds are less precise way. Since that time the kitchen runway just worked harder than the journey. In case of high-temperature engines, of the components in it is still expanding, if it suddenly turned off it will damage the cylinder wall.

* In addition the machine is required to continuously high rotation certainly experience stress. These conditions make the state machinery is not yet stable.

* The habit of turning off the engine suddenly after traveling at high speed can cause the piston rings wear faster. Further spread to a decrease in compression so that the power to suck.

* To turn off the engine when it let stand a round of iddling a while until the machine is really in a stationary state. After that turn the ignition to the off position

READ MORE.......

for more details and updates about automotive-technology-guide please visit.........
www.automotive-technology-guide.blogspot.com
---or---

www.automotive-technology-guide.com

Read More