Four "misunderstandings" about lubricants

Automotive lubricants are used at a very high frequency during maintenance. In addition to protecting the engine and reducing the number of oil changes, high-quality lubricants can also save on gasoline expenses. At the same time should also pay attention to not cause improper use of lubricants caused by improper use of the car, "improper" use of the method is generally derived from the four types of lubricants on the "misunderstanding."
Misconception 1: Lubricating oil can increase the amount of lubricating oil should be controlled in the oil dipstick between the upper and lower tick marks as well. Because too much lubricating oil will enter the combustion chamber from the gap between the cylinder and the piston to form a coke combustion. These coke deposits will increase the engine compression ratio and increase the tendency to produce knocking. Coking in a red hot state in the cylinder will also cause premature combustion. If it falls into the cylinder, it will increase the wear of the cylinder and the piston, and it will also accelerate the pollution of the lubricant. Secondly, too much lubricating oil increases the stirring resistance of the crankshaft connecting rod, which increases the fuel consumption.
Misconception 2: When the oil becomes dark, it is not comprehensive to change the oil. For lubricating oils that do not add a clear dispersant, the color blackening is indeed a sign that the oil has been seriously deteriorated, but the lubricants used in Hyundai Motors are generally added with a decomposing agent. This clearing agent cleans the film and black coke adhering to the piston and disperses it in the oil to reduce the formation of high-temperature deposits in the engine. Therefore, after the oil is used for a period of time, the color tends to turn black, but this time The oil has not completely deteriorated.
Misconception 3: Lubricants are frequently added and not changed. It is correct to check the lubricating oil regularly, but only replenishing the replacement can only make up for the shortage of oil, but it cannot fully compensate for the loss of lubricating oil performance. During the use of lubricating oil, the quality of the lubricating oil will gradually decrease due to pollution, oxidation, etc. At the same time, there will be some consumption and the quantity will decrease.
Misconception 4: The use of additives The true high-quality lubricants are finished products with a variety of engine protection functions. Formulations already contain a variety of additives, including anti-wear agents, and lubricants are the most balanced formulation to ensure full performance. Play. Adding other additives on their own will not only bring additional protection to the vehicle, but will also react with the chemical substances in the engine oil, resulting in a decline in the overall performance of the engine oil.

Plastic Injection Molded Connector Accessories

Plastic connecter

Mechanical properties of injection connector fittings as far as connection functions are concerned, insertion and extraction forces are important mechanical properties. Plug force is divided into insert force and pull out force (pull out force is also called separation force), the requirement of both is different. In the relevant standards, there are provisions for maximum insertion force and minimum separation force, which indicate that, from the point of view of use, the insertion force should be small (hence the structure of LIF with low insertion force and ZIF without insertion force), and if the separation force is too small, it will affect the reliability of contact.
Another important mechanical property is the mechanical life of the connector. Mechanical life is actually a kind of durability index, which is called mechanical operation in GB5095. It is based on a cycle of one insert and one pull, and whether the connector can normally complete its connection function (such as contact resistance) after the specified plug cycle. The plug force and mechanical life of the connector are related to the plating quality (sliding friction coefficient) of the contact part of the contactor structure (positive pressure size) and the dimensional accuracy (alignment) of the contactor.

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