A cylinder head water jacket structure and engine cooling system that can improve engine cold start performance

Abstract

The invention discloses an air cylinder cover water sleeve structure capable of improving cold-starting performance of an engine, and an engine cooling system. The air cylinder cover water sleeve structure comprises an air cylinder cover water sleeve body, an air cylinder cover water sleeve water-outlet chamber, an engine oil cooler water-outlet hole and an engine body water outlet are formed in the air cylinder cover water sleeve body, the engine oil cooler water-outlet hole and the engine body water outlet communicate with the air cylinder cover water sleeve water-outlet chamber, a buffer chamber is formed between the air cylinder cover water sleeve water-outlet chamber and the engine oil cooler water-outlet hole, one end of the buffer chamber communicates with the air cylinder cover water sleeve water-outlet chamber, and the other end of the buffer chamber communicates with the engine oil cooler water-outlet hole. The air cylinder cover water sleeve structure is simple in structure,and the two-way flow of cooling liquid heated by a small circulation pipeline can be reasonably distributed, so that the more cooling liquid used for heating an engine body can flow into the engine body.

Description

technical field [0001] The invention relates to a cylinder head water jacket structure, which belongs to the technical field of machining equipment, in particular to a cylinder head water jacket structure capable of improving engine cold start performance and an engine cooling system containing the structure. Background technique [0002] When a gasoline engine starts cold, the temperature in the cylinder and engine oil is low, and the fuel atomization effect is poor. In order to ensure the power, the mixture needs to be enriched. At this time, the combustion of the mixture is not sufficient, which will lead to an increase in fuel consumption and HC and CO emissions. increase, worsening the fuel economy and emission performance of the engine; in addition, when the oil is in a state of solidification or precipitation due to low temperature during cold start, the lubricating performance decreases, which will lead to increased wear of the moving parts of the engine and affect th...

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Problems solved by technology

The description of the invention records: the setting of the throttle hole can reduce the cooling water flow rate in the small cycle of the engine, improve the cold start performance of the engine, and accelerate the warm-up process. It can be seen from the description and drawings that this technical solution has the following defects : 1. The small throttling hole reduces the cooling water flow in the small circulation as a whole but does not change the flow of the coolant in the engine body and the coolant in the oil cooler after passing through the small circulation pipeline. The proportion, that is, the total cooling water flow rate is reduced, and the coolant split ratio remains unchanged, so the amount of coolant flowing into the engine body is substantially reduced. It can be seen from this that this technical solution will only increase the warm-up time and reduce the warm-up time. Efficiency; 2. The above-mentioned technical solution does not clearly disclose the structure of the throttling hole and the specific location of its arrangement, and those skilled in the technical field cannot directly use the patent without paying creative work.

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