The influence of different coating formulations on the performance of GPF in direct injection engines
In order to investigate the effects of different coating formulations on the performance of gasoline direct injection(GDI) engines in gasoline particulate filter(GPF) tests,the platform calibration system PUMA software was used to carry out bench tests on different coated particulate matter trap samples(GPF-A,GPF-B) of a GDI engine. No changes were made to the engine in the test. The test re-sults show that the pressure difference of GPF-A and GPF-B is basically the same. At a gasoline particu-late filter temperature of 650 ℃,with the increase of oxygen flow rate,the combustion rates of GPF-A and GPF-B both significantly increase,and at the same oxygen flow rate,the combustion rate of GPF-A is higher. At an oxygen mass flow rate of 500 mg/s,as the gasoline particulate filter temperature in-creases,the combustion rates of GPF-A and GPF-B both significantly increase,with GPF-A having a higher combustion rate. The internal temperature fields of GPF-A and GPF-B are consistent after oil cut-off at 700 ℃. GPF-A rises from the initial temperature of 710 ℃ to the highest temperature of 960 ℃ af-ter oil cut-off for 18 s,while GPF-B rises from the initial temperature of 705 ℃ to the highest tempera-ture of 942 ℃ after oil cut-off for 24 s. When the engine runs for the same time at medium load (70％ rated load) and medium speed (3000 r/min) on the test bench,the amount of carbon captured by GPF-A is small,indicating that the capture efficiency of GPF-B is better than that of GPF-A under this work-ing condition.
gasoline direct injection enginegasoline particulate filterburning rateperformancebench calibration
万方数据
维普
