Sometimes, the speed of the car is very low after striking a fire, and then it slowly turns off. What happened?

1, the spark plug loses its ignition ability.

There is something wrong with the throttle valve. The above two problems will cause engine jitter and unstable speed.

3. Carbon deposition will cause insufficient combustion of gasoline, leading to engine jitter. The influence of engine carbon deposition on automobiles is considerable. First, the engine power is reduced, that is, the power output is uneven and gradually decays, in other words, it is getting less and less powerful. The second is to increase fuel consumption and increase your economic burden.

Third, it is difficult to start a cold start, that is, it is difficult to strike a fire and it is not easy to get a taxi. Finally, serious carbon deposition in the combustion chamber will also lead to cylinder knocking, and low-speed acceleration will make noise, which will damage the piston and crankshaft, lead to engine heating, and seriously affect automobile safety. Then the discharge exceeds the standard, which not only fails the annual inspection, but also directly aggravates the harm of environmental pollution.

trait

The spindle motor of the hard disk drives the disk to rotate at high speed, which generates buoyancy and makes the magnetic head float above the disk. To bring the data sector to be accessed under the magnetic head, the faster the rotation speed, the shorter the waiting time. So the rotational speed largely determines the speed of the hard disk.

General household hard disks rotate at 5400 rpm and 7200 rpm, so server users have higher requirements for hard disk performance. The rotational speed of SCSI hard disks used in servers is basically 10000rpm, and even 15000rpm, which is much better than household products.

Higher rotational speed can shorten the average seek time and actual reading and writing time of hard disk, but with the continuous improvement of hard disk rotational speed, it also brings negative effects such as temperature rise, motor spindle wear and working noise increase. The rotational speed of notebook hard disk is lower than that of desktop hard disk, which is affected by this factor to some extent.

The internal space of the notebook is small, and the size of the notebook hard disk (2.5 inches) is designed to be smaller than that of the desktop hard disk (3.5 inches). The temperature rise caused by the increase of rotating speed puts forward higher requirements for the heat dissipation performance of the notebook itself; The noise is getting louder and louder, so necessary noise reduction measures must be taken, which puts forward more requirements for notebook hard disk manufacturing technology.

At the same time, the increase of speed, other things being the same, means that the power consumption of the motor will increase. The more power consumed per unit time, the shorter the working time of the battery and the portability of the notebook will be affected. Therefore, the notebook hard disk generally uses a relatively low-speed 5400 rpm hard disk.