|
| Experimental Study on HCCI Combustion Optimization of Hydraulic Free Piston Engine |
| DOI： |
| Key Words:C engine hydraulic free piston engine（HFPE） homogeneous charge compression(HCCI) indicated efficiency n-heptane |
|
| Hits: 2145 |
| Download times: 1736 |
| Abstract:An experimental study on a hydraulic free piston engine（HFPE） was made, focusing on homogeneous charge compression ignition（HCCI） process. The effects of mixture equivalent ratio and compression ratio on reaction starting points at low and high temperatures, two-stage heat release ratio and indicated efficiency were analyzed. The result shows that when the compression ratio is constant, the lower the mixture equivalent ratio is, the earlier the reaction starting point is at low temperature, the later the reaction starting point is at high temperature, and the higher the proportion is of reaction heat release at low temperature to that at high temperature； when the mixture equivalent ratio is constant, with the increase of the compression ratio, the reaction starting points at low and high temperatures are both advanced, and the ratio of reaction heat release at low temperature to that at high temperature is lower； when the mixture equivalence ratio increases from 0.30 to 0.40, the maximum indicated thermal efficiency is slightly reduced, and the difference between the maximum and the minimum is 3%； when the mixture equivalence ratio is constant, there is a best compression ratio for the maximum efficiency, and a compression ratio that is too low or too high is not conducive to improving the efficiency of thermal power transformation. |
| View Full Text View/Add Comment Download reader |
|
|
|