Water jacket of cylinder body of diesel engine

Abstract

The invention discloses a water jacket of a cylinder body of a diesel engine. The water jacket mainly comprises a ring-shaped cavity at the periphery of the cylinder body, wherein a water hole is formed in a nasal bridge zone between adjacent two cylinder holes; a water outlet of a spiral case of a water pump is communicated with the water jacket of the cylinder body; and the water hole in the nasal bridge zone is communicated with the water jacket of the cylinder body and integrally casted and formed with the water jacket of the cylinder body. After entering the water jacket of the cylinder body from the water outlet of the spiral case of the water pump, cooling liquid is divided into two ways at an intersecting part of the adjacent two cylinder holes; and one way of cooling liquid flows through the water hole in the nasal bridge zone, and the other way of cooling liquid flows into a water jacket of the next cylinder hole. Compared with the prior art, through integrally casting and forming the water hole in the nasal bridge zone and the water jacket of the cylinder body, water ways between adjacent two cylinders are directly connected, so that the working temperature of the nasal bridge zone can be better reduced; and besides, the casting manner is simple, so that the difficulty of a processing technology of the water jacket is reduced as much as possible.

Description

technical field [0001] The invention relates to a water jacket of a diesel engine cylinder body. Background technique [0002] The cylinder block water jacket is the main component of the engine cooling system. When the mixture of fuel and air is burned in the combustion chamber, a large amount of heat is transferred to the cylinder bore wall. If the cooling capacity of the cylinder jacket water jacket outside the cylinder bore is insufficient, High temperature will easily deform the cylinder bore, which will cause the engine piston and piston ring to work abnormally, resulting in oil sintering, high fuel consumption and oil consumption, unqualified emissions, cylinder scuffing and even engine scrapping. [0003] At present, conventional diesel engines consider the compactness of the whole machine. The design of the cylinder block water jacket is generally to process small-diameter oblique water holes in the nose bridge area of ​​the cylinder block, and make the nose bridge ...

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Problems solved by technology

[0002] The cylinder block water jacket is the main component of the engine cooling system. When the mixture of fuel and air is burned in the combustion chamber, a large amount of heat is transferred to the cylinder bore wall. If the cooling capacity of the cylinder jacket water jacket outside the cylinder bore is insufficient, The high temperature will easily deform the cylinder bore, which will cause abnormal operation of the engine piston and piston ring, resulting in oil sintering, high fuel consumption and oil consumption, unqualified emissions, cylinder scuffing and even engine scrapping

[0003] At present, conventional diesel engines consider the compactness of the whole machine. The design of the cylinder block water jacket is generally to process small-diameter oblique water holes in the nose bridge area of ​​the cylinder block, and make the nose bridge area very thin. After the cylinder block is cast, Then process the inclined water hole in the nose bridge area to let the coolant pass through to reduce the working temperature of the nose bridge area. This method often cannot sufficiently reduce the temperature in the nose bridge area, and the processing technology of the inclined water hole is relatively difficult and requires high processing tools. The production cycle is long, which increases the cost; in addition, the small circulation system of the diesel engine is equipped with peripheral pipelines to enhance the cooling capacity of the water jacket of the cylinder block, so as to meet the requirements of the engine, but the accessories are very complicated, which also affects the performance of the whole machine. compactness

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