Anti-icing structure of PCV opening of escape pipe of air cleaner of air inlet system

Abstract

The invention relates to the field of ventilation air inlet of a crankcase of an automobile engine, in particular to a structure of an escape pipe of an air cleaner of an air inlet system. According to an anti-icing structure of a PCV opening of the escape pipe of the air cleaner of the air inlet system, the PCV opening outwards extends naturally to form a PCV opening connecting section; a PCV connector comprises a ventilation pipe section, a jointing face and an air outlet pipe section, the inner wall of the connecting position of the ventilation pipe section and the air outlet pipe section is in smooth transition, the jointing face is arranged at the junction of the ventilation pipe section and the air outlet pipe section, and the air outlet pipe section is inserted into the PCV opening connecting section; and the PCV connector is fixedly installed on the PCV opening connecting section through the jointing face in a sealing manner, the inner diameter of the air outlet pipe section is not smaller than the inner diameter of the ventilation pipe section, and the wall thickness of the end face of the ventilation pipe section needs to be designed as thin as possible. According to the anti-icing structure, the structure at the connector is reasonably arranged, condensate water of a curved through pipe is prevented from staying at the PCV opening, the extra space and the extra cost do not need to be additionally increased, poor ventilation caused by icing blockage of the PCV opening can be avoided, and the reliability of a vehicle in an extremely-cold region is improved.

Description

technical field [0001] The invention relates to the field of ventilation and air intake of crankcases of automobile engines, in particular to an air outlet pipe structure of an air filter of an air intake system. Background technique [0002] The automobile air intake system and the engine crankcase ventilation system are important systems to maintain the normal operation of the engine, especially the engine crankcase ventilation system. If the ventilation is poor and the pressure is too high, the light ones will cause the oil to become thinner, accelerate deterioration, and poor lubricating performance. Even engine oil overflows from the fuel filler port; severe cases will damage the seal of the crankcase, resulting in oil seal leakage, loss of engine oil leakage, and even the camshaft cap falling off, causing the engine to fail to start; or causing polluted gas to flow into the air filter in reverse, polluting the filter element, etc. Wait. However, in extremely cold regi...

AI Technical Summary

Problems solved by technology

[0002] The car air intake system and the engine crankcase ventilation system are important systems to maintain the normal operation of the engine, especially the engine crankcase ventilation system. If the ventilation is poor and the pressure is too high, the lighter ones will cause the oil to become thinner, accelerate deterioration, and poor lubricating performance. Even engine oil overflows from the fuel filler port; severe cases will damage the seal of the crankcase, resulting in oil seal leakage, loss of engine oil leakage, and even the camshaft cap falling off, causing the engine to fail to start; or causing polluted gas to flow into the air filter in reverse, polluting the filter element, etc. Wait

However, in extremely cold regions in winter, the icing of the forced ventilation head (Positive Crankcase Ventilation PCV port) of the air filter outlet pipe is a relatively common fault in many vehicles. The icing and blockage of the PCV port will lead to poor ventilation of the crankcase and excessive pressure. Affect the normal operation and start of the vehicle

For this reason, many designers are looking for various solutions to solve the problem of icing at the PCV port of the air filter outlet pipe, such as adding a liquid storage chamber, using electric heating, etc., all of which require additional auxiliary devices and additional space, which not only increases the cost, but also increases the cost. also increases the space requirements of the cabin

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