A pressure-adjustable venting device for a diesel engine crankcase

By designing a discharge air pressure adjustment device and a maze oil return structure in the crankcase breathable device of the diesel engine, the problems of crankcase pressure control and oil pollution are solved, and stable and efficient diesel engine operation and safety guarantee are achieved.

CN115628125BActive Publication Date: 2025-03-25SHANNXI DIESEL ENGINE HEAVY IND
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Patent Information

Application Number
CN202211209066.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-09-30
Publication Date
2025-03-25
Estimated Expiration
2042-09-30

AI Technical Summary

Technical Problem

The existing diesel engine crankcase breathable device is difficult to effectively control crankcase pressure, resulting in oil pollution, pressure fluctuations and safety hazards.

Method used

A pressure adjustable breathable device for a diesel engine crankcase is designed. By installing a discharge air pressure adjustment device and a maze oil return structure on the breathable steel pipe, the fine control of the crankcase pressure and the recycling and reuse of lubricating oil are achieved.

Benefits of technology

It effectively solves the problem of too low and fluctuations in the crankcase pressure, ensures that the crankcase pressure is within the required range, reduces lubricant consumption, improves the reliability and service life of the diesel engine, and reduces safety hazards.

✦ Generated by Eureka AI based on patent content.
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Abstract

Provided is a pressure-adjustable ventilation device for a diesel engine crankcase, belonging to the technical field of diesel engines, comprising a crankcase ventilation steel pipe, the crankcase ventilation steel pipe is divided into an upper section and a lower section, a discharge air pressure regulating device is connected between the lower end of the upper section of the ventilation steel pipe and the upper end of the lower section of the ventilation steel pipe, the discharge air pressure regulating device comprises a lower shell and an upper shell, the lower end of the lower shell is sealedly connected to the upper end of the lower section of the ventilation steel pipe, the upper end of the upper shell is sealedly connected to the lower end of the upper section of the ventilation steel pipe, a guide plate is sealed between the upper end of the lower shell and the lower end of the upper shell and fixedly connected, the inner cavities of the lower shell and the upper shell connect the upper section of the ventilation steel pipe and the lower section of the ventilation steel pipe, a connecting hole is provided on the guide plate, a valve disc is placed on the upper part of the guide plate; an oil reflux structure is provided in the walls of the lower shell and the upper shell. The invention has a simple and reasonable structure, and can effectively solve the problems of diesel engine lubricating oil pollution, crankcase pressure control and safety.
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