Water cooling structure for multi-cylinder engine

Abstract

The invention discloses a water cooling structure for a multi-cylinder engine. The structure comprises a cylinder body cooling water flow channel and a cylinder cover cooling water flow channel, wherein the cylinder body cooling water flow channel is provided with an water inlet of the cylinder body cooling water flow channel and a water outlet of the cylinder body cooling water flow channel; a water flow damping device is arranged in the cylinder body cooling water flow channel; the cylinder body cooling water flow channel is divided into a front section and a rear second by the water flow damping device; the cylinder cover cooling water flow channel surrounds all the cylinder combustion chamber regions; the cylinder cover cooling water flow channel of each cylinder combustion chamber region is provided with a cylinder cover water inlet and a cylinder cover water outlet; the top of the cylinder cover cooling water flow channel is communicated with an exhaust pipe; the cylinder cover water inlet of the cylinder cover cooling water flow channel of each cylinder combustion chamber region is communicated with the cylinder body cooling water flow channel at the front section of the water flow damping device; and the cylinder cover water outlet of the cylinder cover cooling water flow channel of each cylinder combustion chamber region is communicated with the cylinder body cooling water flow channel at the rear section of the water flow damping device. The structure ensures that each combustion chamber of a cylinder cover can be uniformly cooled by cooling water and avoids influence of local overheating of the cylinder cover on the engine performance.

Description

technical field [0001] The invention belongs to automobile engine cooling technology, in particular to a multi-cylinder engine water cooling structure. Background technique [0002] At present, the cooling water flow scheme generally adopted in the existing engine cooling system is as follows: firstly, the water with a lower temperature after being cooled by the radiator is pumped into the front end of the cylinder through the water pump and sent to the water diversion channel on the side of the cylinder, and then the main water flow It flows through the gap between the cylinder barrels to the other side of the cylinder barrel, flows upwards into the cylinder head through the water hole between the cylinder block and the cylinder head, and then flows through the high temperature area of ​​the combustion chamber near the center of each cylinder of the cylinder head, and finally by Concentrated outflow from the outlet pipe of the cylinder head. Its disadvantages are: it is di...

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Problems solved by technology

Its disadvantages are: it is difficult to control the flow of coolant in the cylinder body and cylinder head, and the uniformity of cooling and the consistency of cooling performance of each cylinder should not be well guaranteed.

[0003] The Chinese Patent Office discloses a cooling system for engines, the publication number is CN1786433A, the feature of this patent is that the cooling system is designed as a structure independent of the water flow channel of the cylinder block and the water flow channel of the cylinder head, and the two cooling streams supplied by the water pump The water is used to cool the cylinder block and the cylinder head separately, but there is such a shortcoming in this invention patent: since the cooling water in the cylinder head does not cool the combustion chambers of each cylinder independently, it only flows in from one end of the cylinder head, in order After cooling the combustion chamber area of ​​each cylinder, it flows out from the other end of the cylinder head, so that the combustion chamber area that is cooled first will heat the cooling water, resulting in the water temperature of the combustion chamber area that is cooled last is much higher than the combustion chamber area that is cooled first , so it is impossible to achieve uniform cooling of each combustion chamber of the cylinder head

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