New car running-in points[维护知识]

In general, there is a rule for new cars leaving the factory, that is, they must run a certain number of kilometers at a limited speed, commonly known as"Run-in".Usually at an hourly rate40to50Enough to run at a speed of kilometers2Thousand kilometers to makepistonThe contact surface with the cylinder is rubbed more smoothly, and the other parts of the machine are also effectively run-in before they can let go of speed and drive boldly. In order to ensure the implementation of this regulation, in addition to the necessary education for drivers, the relevant departments have also specially developed sub-speed governors to install on new cars, making it difficult to drive a new car and want to run fast.
Indeed, the previous production technology was relatively backward, the precision was poor, the material was soft, the friction surfaces of the cylinder and the piston were not very consistent, and the gears in the gearbox and the differential case and all the friction parts of the components were not good enough.For safety and extensioncarAfter buying a new car, you must travel slowly for a period of time, so that the various parts can be effectively run-in, the joints are closer, and the parts with quality problems can be replaced to ensure the safe and high-speed driving of the car. Otherwise, problems such as engine overheating will occur when driving at a high speed suddenly, that is, the high temperature caused by friction will cause the piston and cylinder to expand and jam, and the car will not be able to run, causing damage to the car and even driving accidents.
However, with the development of science and technology, the continuous improvement and improvement of the level of automobile manufacturing technology, for many middle and high-end automobiles, the extensive use of high-quality materials and advanced production technology, such as each engine is on a fixed test bench A long-term running-in test was carried out, and the car body was installed after careful adjustment and inspection. Others, such as gears and bearings in the gearbox and differential case, have been carefully designed, and the material and precision have been greatly improved compared to the original performance. There is no need to worry about the problems of friction. Some gearboxes, differential boxes,transmission shaftEven adopted"Maintenance-free"The trend of removing the oil drain hole structure, you can permanently not replacelubricating oil, Even if you open it after driving tens of thousands of kilometers, or when you encounter a car for maintenance, the lubricant inside is still very clean. The bearing part has improved the old method of using the copper sleeve type and replaced it with high-quality high-speed steel ball or roller bearings. Therefore, after receiving these new cars, there is no need to carry out a special initial run-in, as long as they do not drive on the highway.
same"Too slow is not good"The principle is the same. If you don’t pursue a deliberate initial driving speed, let it go, you don’t need to change gears frequently, you can also give full play to the car’s inertia, reduce the burden on the engine, and make it work more easily. Failure rate and prolonging the service life of the car are very beneficial, you may wish to try.
The so-called driving phase is passing through the front1000After a kilometer of walking, I entered1000to1500The kilometer driving phase, at this time, the engine has passed0to1000The driving distance of kilometers has been adapted to various conditions. At this stage, the car has entered the transitional stage of normal driving. When driving at this stage, you should closely watch the working status of each component. This is a must. of.