Danfoss Motor, Why Is The Motor Worn?

 

    Cylinder wear is a common problem on motors. It is important to know that the degree of wear of the cylinder has the greatest impact on the dynamics of the car, and in general, the main basis for us to determine whether the vehicle needs to be overhauled is also it.

  There are many reasons for cylinder wear, and the following are common. The     Danfoss Motor    states:

  1. The effect of poor lubrication

  One reason is that because the upper part of the cylinder is close to the combustion chamber, the temperature is higher, and the lubricating oil will become thinner under the action of high temperature. As a result, the viscosity is lowered, the oil film is not easily formed, or even burned; another reason is that it enters the mixed gas in the cylinder. It contains fine fuel oil droplets, especially at low temperatures, which constantly flushes the oil on the cylinder wall, causing severe dry and semi-dry friction in the upper part of the cylinder.

  2. The influence of abrasive

  Inhalation of hard dust in the air of the cylinder and carbon deposits generated during incomplete combustion _ oil such as unfiltered metal particles in the lubricating oil enters between the cylinder wall and the mating surface of the piston and the piston ring, as the piston is in the cylinder The reciprocating motion causes abrasive wear of the cylinder.

  3. The impact of mechanical wear

  At the moment of the power stroke of the motor, the high-pressure gas in the cylinder breaks into the back of the piston ring, increasing the pressure of the piston ring against the cylinder wall, increasing the friction between the piston ring and the cylinder wall, and increasing the wear.

  4. The impact of knocking combustion

  Knocking combustion is an abnormal combustion phenomenon of gasoline motors. Since the mixture at the end of the combustion chamber has not yet reached the flame formed by the spark plug flashover, the effect of further compression and thermal radiation by the expansion of the first combustion mixture _ self-generating one or several flame centers to burn – this phenomenon is called explosion Shock combustion, referred to as deflagration. The detonation shock wave also blows and ignites the oil film from the cylinder wall, which deteriorates the lubricating performance and enhances the corrosion effect.

  5. Electrochemical corrosion wear

  At low temperatures, the product after combustion in the cylinder reacts with water vapor to form acid, softens the cylinder wall, and the softened portion is easily scraped off by the piston ring, resulting in wear of the cylinder, and the lower the temperature, the more serious the phenomenon.

  When the wear of the cylinder exceeds a certain allowable limit, the normal cooperation with the piston and the piston ring will be destroyed, so that the piston ring cannot be tightly pressed against the cylinder wall _ causing air leakage, simmering oil _ causing the motor power to decrease, and the fuel consumption is increased _ The motor is not working properly. The cylinder wears with the piston and the piston ring, and the clearance increases, so that the pressure during compression of the cylinder is lowered, resulting in a decrease in motor power.

  The owner wants to prevent such a situation from happening and can do some maintenance measures. The first one is to ensure good lubrication; to strengthen the three-filter work, for the air filter, the air filter should be replaced in time according to the working environment requirements of the car. Filter or replace the oil in the wet air filter; maintain the normal temperature of the motor to reduce corrosion and wear; use the required fuel _ to avoid shock.

  The maintenance of the vehicle is at the usual level of attention. Although the cylinder must have some wear during the daily driving process, as long as the maintenance is taken care, the wear of some cylinders can be reduced more or less, thereby prolonging the life of the machine.

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