Study On The Measures And Test Of The Improve Compression Ratio Of 4G6 Series Engine

As the car retains the quantity is increasing year by year,energy consumption and environmental pollution problems of also gradually highlights.The main components of the air pollution comes from the emission of pollutants from the vehicle emissions,and has brought the unprecedented problems to the pollution of the environment.First,In this paper,The thesis to enhance both fuel economy and improving the power performance for the purpose,The thesis based on fully understand the structure and properties of MMC 4G6 series engine,Beginning from the design concept of combined with the full experimental verification,The change of influence of 4G6 series engine parts structure size of the engine,The cost remained unchanged,Based on the compression ratio is improved.To optimize engine combustion,to match intake and injection,indirectly improve engine torque and power,reduce emissions,and reduce fuel consumption rate.Second,set up compression ratio concept were introduced the advantages and disadvantages of the effect on performance,and fuel economy and emission of the engine technology,explained any improvement in fuel economy at the same time,Improve the emissions.improve performance is needed to costs.And want to lower the cost of cost-effective to complete the above development work only in the feasible range of compression than the upgrade this way can be significantly improved.Through the influence of compression than the maximum in cylinder displacement,travel,the diameter of cylinder,piston,piston ring design modification of the dimension,change the compression effect on engine performance cycle thermal efficiency and mean effective pressure and gas exchange process.Analysis and measure the compression ratio plays in internal combustion engines and negative factors.Third,4G6 series engine compression ratio change includes not only the naturally aspirated 4G69 engine,But also the 4G63T turbocharged engine,while addressing the turbocharged diesel engine to improve the compression ratio within the vehicle industry less touch,and tentatively to increase compression ratio mining pressure potential of the engine and to further optimize the power and balance the discharge of pollutants,and reduce the fuel consumption.Forth,In the fourth part,this paper based on the international recognition of the AVL texter as the basis,according to the design of the simulation experiment,The processing of engine change parts for the actual carrying test and record the results,design scheme comparison,it is concluded that the most suitable compression ratio condition.Through the research and analysis of this thesis focuses on the effects of compression ratio on fuel consumption performance and emissions,that compression ratio on power,fuel consumption,emissions of air pollutants such as problems,in a wealth of experimental data as the basis for the foundation proposed in a proper range to enhance the engine compression ratio at the cost of change under the premise of very small balanced to enhance the power and economy.The research content and results of this paper are intended to provide real and effective experimental data for the future high compression engine research,innovation and development,and deepen the experimental data with their own ideas.Finally,this paper takes the AVL bench internationally recognized as the basis,according to the simulation experiment design of internal combustion engine,after processing the change parts are the actual carrying test,record the results of the experiment.Through this paper carried on the effect of compression ratio on fuel consumption and emission performance of in-depth research and analysis,the influence of compression ratio of fuel consumption,obtain the problem of atmospheric pollutant emission etc.,in plenty of experimental data as the foundation basis,put forward in the proper range to enhance the engine compression ratio can be in need not change under the premise of cost to enhance the power and economy balance.In this paper,research contents and results for the purpose of future research on compression ratio,innovation and development of the engine to provide real and effective experimental data,And combine ideas further experimental data.