| 顾晗，王建，许鑫，张多军，刘胜吉.基于轻型柴油车的柴油机氧化催化器入口温度升温特性及策略研究[J].内燃机工程,2019,40(3):102-109. |
| Research on Inlet Temperature Rise Characteristics of Diesel Oxidation Catalyst and its Strategy for Light-Duty Diesel Vehicles |
| DOI：10.13949/j.cnki.nrjgc.2019.03.014 |
| Key Words:diesel engine diesel particle filter（DPF） active regeneration exhaust thermal management combustion process diesel oxidation catalyst（DOC） heating strategy |
|
| 摘要点击次数: 4513 |
| 全文下载次数: 1950 |
| Abstract:Three typical operating conditions of high, medium and low loads were selected to experimentally investigate the effects of intake throttle and fuel injection strategies on the combustion process, emissions, fuel economy and diesel oxidation catalyst(DOC) inlet temperature of a light-duty diesel engine, obtaining a heating strategy of the DOC inlet temperature at all operating conditions. The results showed that the intake air flow declined with the decrease of the opening of the intake throttle valve, which had a significant effect on the in-cylinder working process: decreased compression pressure, delayed combustion start timing, reduced maximum combustion pressure and decreased cyclic indicated work. HC emission was suppressed and other emissions were deteriorated. The DOC inlet temperature was effectively increased, and the lighter the load, the more significant the temperature rise. A test of fuel injection pattern coupled with intake throttle was conducted. The test results show that with the delay of the main fuel injection timing, the ignition delay is shortened, the weight of the post combustion increases and the DOC inlet temperature rises slightly. The DOC inlet temperature is raised by increasing the fuel quantity of the close post-injection. The DOC inlet temperature rises first and then drops with retarding the close post-injection timing. There is an optimum close post-injection timing. According to the distribution of the engine exhaust temperature in the whole operation range, the strategy of controlling the DOC inlet temperature is proposed. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|