Engine crankcase exhaust gas recirculation system and engine having the same

Abstract

The invention relates to an engine crankcase exhaust gas recirculation system and an engine having the same, and belongs to the technical field of engines. A first-stage labyrinth steel wool-type roughing filter of the engine crankcase exhaust gas recirculation system comprises a roughing filter, wherein a first air inlet pipe is connected to an input end of the roughing filter, a first air outletpipe is connected to an output end of the roughing filter, and a first oil return pipe is connected to the bottom of the roughing filter; a second-stage high-precision filter element filtering systemcomprises a fine filter, wherein a second air inlet pipe is connected to an input end of the fine filter, the input end of the second air inlet pipe is connected with the output end of the first airoutlet pipe, a second air outlet pipe is connected to an output end of the fine filter, and a second oil return pipe is connected to the bottom of the fine filter. The engine crankcase exhaust gas recirculation system and the engine having the same provided by the invention has the characteristics of compact structure and high filtration efficiency, thus engine crankcase exhaust gas recirculationcan be realized; besides, the system can make the engine reliable and stable for a long time, reducing oil consumption as well as exhaust gas emission.

Description

technical field [0001] The invention relates to an engine crankcase exhaust gas recirculation system and an engine with the system, belonging to the technical field of engines. Background technique [0002] As a general power equipment, the engine is widely used in daily production and life. As people pay more and more attention to the environment, emission regulations become more and more stringent, and the treatment of crankcase exhaust gas generated during engine operation is also increasing. Receive attention. Crankcase exhaust gas contains combustion exhaust gas and oil mist leaking from the cylinder during combustion. [0003] At present, there are still a large number of engines that directly discharge the crankcase exhaust gas into the atmosphere without treatment, or introduce the exhaust gas into the intake pipe or the air inlet of the supercharger through simple filtration, and then enter the cylinder to participate in combustion. Since the crankcase exhaust gas...

AI Technical Summary

Problems solved by technology

Since the crankcase exhaust gas contains a large amount of engine oil, if this part of the engine oil is not effectively separated, a large amount of engine oil will accumulate on the impeller of the supercharger compressor, the core of the intercooler and the intake valve, and the intake air will be damaged for a long time. Severe carbon deposits on the door, reduced efficiency of the supercharger and intercooler, affecting the normal operation of the engine

In addition, a large amount of engine oil is burned as the exhaust gas enters the combustion system, which is also one of the reasons for the high oil consumption of the engine.

Images