In order to reduce the development cost and shorten the development cycle,automotive natural gas engines were converted to small and medium power biogas power internal combustion engine,and this paper addresses the feasibility of this approach.Firstly,a one-dimensional performance simulation model of the engine was established,and the model was calibrated and verified by using the bench test results of the automotive natural gas engine.The two compression ratio modification methods were compared by means of a calibrated model,and parameters such as the size of the compression ratio,the duration of intake opening,the phase of intake and exhaust opening,and the ignition advance angle were optimized.The results showed that the method of changing the compression ratio by using the variable combustion chamber volume had better engine performance,and 14 compression ratio and smaller intake opening duration were desirable for converted biogas power internal combustion engine.Compared to the original engine,the optimized engine's power was increased by 3.01% and specific gas consumption was reduced by 2.8%,and the exhaust temperature was reduced,which was more conducive to improving the service life of the exhaust pipe.
关键词
沼气发电内燃机/压缩比/点火提前角/配气相位
Key words
biogas power generation engine/compression ratio/ignition advance angle/gas distribution phase
维普
万方数据