Carbon-free engine

Abstract

The invention relates to a carbon-deposition-free engine. It consists of a cylinder block provided with a water-cooled cavity and at least two cylinder bores, each of which is fitted with a cylinder on the wall of the cylinder bore that is in contact with the cooling water or on the piston stroke section of the corresponding cylinder A certain number of grooves or through holes are opened on the casing wall. The invention can effectively reduce the high temperature inside the cylinder, maintain the lubricity of the cylinder, slow down the wear of parts, prolong the service life, prevent high-temperature sintering carbon deposition, make the cylinder in a more suitable thermal load state, facilitate the full combustion of fuel oil, and maintain strong power Output; the invention will not reduce the strength of the cylinder, and at the same time, due to the uneven thickness of the cylinder wall, the occurrence of resonance can be reduced, and the stability of the engine operation can be enhanced; the structure is simple, the cooling effect is good, the heat load of the piston and the cylinder liner is reduced, and the Reliable advantages, suitable for various types of water-cooled engines.

Description

technical field [0001] The invention relates to the field of internal combustion engines, in particular to a carbon-deposition-free engine. Background technique [0002] With the development of society, the production and sales of automobiles continue to increase, and the problem of carbon deposition in automobile engines continues to emerge. Carbon deposition is also a difficult problem in the history of the world's automobile development. Carbon deposition refers to the deposits produced by the incomplete combustion of the blow-by gas mixing of internal combustion engine fuel and lubricating oil. It is reported that Japanese and Korean models should remove carbon deposits at about 30,000KM, because most of the Japanese and Korean models are low-speed and high-torque engines, which focus on low-speed driving, and carbon deposits have relatively little impact on engine power and fuel consumption. On the contrary, European and American models need to remove carbon deposits o...

AI Technical Summary

Problems solved by technology

[0003] If the engine temperature is too high, the lubricating oil will become too thin due to the increase of oil temperature, and the oil film on each lubricating part of the engine will not be easily formed or destroyed, and semi-dry friction or even dry friction will appear on the mating surface, which will easily cause lubricating oil to burn. Coke, carbon deposits and loss of lubrication function, thereby accelerating the wear of parts and reducing the service life of the engine; when the engine is overheated, the strength, elasticity, and wear resistance of metal parts will decrease under the action of high temperature for a long time, and thermal stress will occur. Deformation, cracks and expansion will eventually appear, and change the fit gap between parts, affecting the working performance of the engine; the overheating of the engine will cause the air entering the cylinder to expand due to heat, and the air density will decrease, resulting in a decrease in the inflation coefficient; the diesel engine will produce early combustion and reduce the amount of air charged , the friction loss increases; due to the relative reduction of air intake, the mixing ratio of fuel and air is out of balance, so that the combustion process of the diesel engine is abnormal, and early combustion or deflagration will occur, resulting in increased fuel consumption, reduced power, and black smoke from the exhaust pipe , the reliability and durability of the work will deteriorate; in severe cases, the moving parts will lose their normal clearance due to thermal expansion, and the friction will increase, resulting in vicious failures such as piston scuffing or jamming.

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