For DAEWOO automotive camshafts, what common working conditions will accelerate their wear during long-term use?
During the long-term use of DAEWOO automotive camshafts, the following common working conditions will accelerate their wear:
High temperature working conditions
When the engine is running at high load, a lot of heat will be generated. For example, when the vehicle is running at high speed for a long time, frequently accelerating and braking suddenly, or climbing continuously on complex road conditions such as mountain roads, the engine is in a high load state, and the combustion temperature in the cylinder increases, which will greatly increase the operating temperature of the DAEWOO automotive camshaft. Excessive temperature will change the metallographic structure of the camshaft material, reduce the strength and hardness of the material, and accelerate the wear of the camshaft.
High speed working conditions
When the vehicle needs to downshift and overtake at high speed, the engine speed will increase sharply, or in special scenarios such as track driving, the engine will maintain a high speed range for a long time, and the speed of the DAEWOO automotive camshaft will also increase accordingly. At high speeds, the contact frequency and impact force between the camshaft and valve tappets and other components will increase significantly, and the lubricating oil film may not be formed in time or be destroyed, resulting in poor lubrication effect, thereby aggravating the wear of the camshaft.
Poor lubrication conditions
If the lubricating oil used is of poor quality, such as the viscosity of the lubricating oil does not meet the engine requirements, the cleaning performance is poor, or it contains impurities, it will not be possible to form a good oil film between the camshaft and other friction parts, which will cause the camshaft to directly contact and rub against these parts, accelerating wear. In addition, if the lubricating oil is not replaced for a long time, it will deteriorate due to oxidation, pollution, etc., and the lubrication performance will decrease, which will also cause the camshaft to wear more.
Excessive engine load
When the vehicle is overloaded, towing heavy objects, or driving on a road with extremely poor road conditions, the engine needs to output more power to overcome resistance, which will significantly increase the load on the DAEWOO automotive camshaft. Under high load, the pressure between the camshaft and valves and other components increases, exceeding the normal working pressure range, which will aggravate the wear of the camshaft surface.
Frequent low-temperature starts
In cold areas, vehicles are often started in low-temperature environments. The viscosity of the engine oil will increase and the fluidity will deteriorate, resulting in the lubricating oil failing to reach the surface of the camshaft and other components in time for effective lubrication. At this time, the camshaft is in a dry friction or semi-dry friction state at the moment of starting. Frequent low-temperature starts will cause this wear to accumulate and accelerate the wear of the camshaft.
Anhui KORBOR Machinery Co., Ltd., as a leading domestic automotive camshaft manufacturer, in order to cope with these working conditions that may cause camshaft wear, when producing DAEWOO automotive camshafts, high-performance alloy materials are selected, and heat treatment processes such as tempering, carburizing and quenching are used, which significantly improves the strength, hardness and wear resistance of the camshaft to ensure that it can maintain good performance in various complex working environments, reduce wear and extend service life.