Piston cooling spray hook

Abstract

The invention discloses a piston cooling spray hook. The piston cooling spray hook comprises a base and a spray hook body. The base is fixed to an engine body and enables an internal oil cavity of the base to be communicated with an engine oil channel in the engine body. The spray hook body comprises a transverse branch and an S-shaped branch, an oil guide hole aligned at an engine oil cooling cavity opening of a piston is formed in the side wall of the S-shaped branch, and an outer end oil outlet of the spray hook body is aligned at the a small connecting rod end and a piston pin. A spraying point (the oil guide hole) is added to the piston cooling spray hook, cooling and lubricating of the bottom of the piston are enhanced, the cooling need of the bottom of the piston is fully guaranteed, lubricating and cooling of the piston pin and the small connecting rod end can be enhanced, the probability that the bottom of the piston is overheated and breaks down is lowered, and the reliability and quality of an engine are improved.

Description

technical field [0001] The invention relates to the field of engines, in particular to a piston cooling spray ditch. Background technique [0002] Existing engines, the degree of strengthening continues to increase, and the heat load continues to increase. The piston and the small-end bearing shell of the connecting rod connected to the piston are prone to overheating, and serious problems such as piston melting and overheating failure of the small-end bearing shell of the connecting rod will occur. . In the prior art, the piston cooling spray hook is added to cooperate with the bottom of the piston to increase the oil cooling cavity to strengthen the cooling of the bottom of the piston. The oil cooling chamber at the bottom of the piston has two openings. The oil sprayed from the piston cooling spray hook enters the oil chamber at the bottom of the piston through one of the openings, and comes out from the other opening to take away heat and reduce the temperature at the b...

AI Technical Summary

Problems solved by technology

[0003] Since the piston cooling spray hook of the prior art has only one oil outlet, the sprayed oil basically enters the inlet of the oil chamber at the bottom of the piston, so other positions at the bottom of the piston, including the piston pin and the small end of the connecting rod connected to the piston pin, are not Sufficient oil lubrication and cooling, prone to overheating problems. In actual use, problems such as overheating and blackening of the bearing bushes at the small end of the connecting rod have also been found. In severe cases, the bearing bushes at the small end of the connecting rod will wear and fall off. If the cooling of this part is not strengthened, the use time will be long If it is damaged or the environment is bad, it will easily lead to the wear and failure of the bearing bush of the small end of the connecting rod, and the serious failure of the scrapped piston connecting rod assembly.

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