汽车工程
汽車工程
기차공정
AUTOMOTIVE ENGINEERING
2014年
8期
944-949
,共6页
重型柴油机%废气再循环%空燃比%两阀联合控制策略
重型柴油機%廢氣再循環%空燃比%兩閥聯閤控製策略
중형시유궤%폐기재순배%공연비%량벌연합공제책략
heavy duty diesel engine%EGR%air-to-fuel ratio%two valve joint control
为对某重型柴油机EGR系统进行排放优化和流量精确控制，基于排放优化原则，采用了一种节气阀配合EGR阀控制EGR流量的全工况两阀联合控制系统。先后在半实物实时仿真平台和台架上进行了控制器跟踪效果和排放改进效果的验证。结果表明：所设计的控制器能在各种工况下精确控制空燃比；在测试工况条件下，排放水平较稳态EGR优化MAP控制方法有了较大改进。
為對某重型柴油機EGR繫統進行排放優化和流量精確控製，基于排放優化原則，採用瞭一種節氣閥配閤EGR閥控製EGR流量的全工況兩閥聯閤控製繫統。先後在半實物實時倣真平檯和檯架上進行瞭控製器跟蹤效果和排放改進效果的驗證。結果錶明：所設計的控製器能在各種工況下精確控製空燃比；在測試工況條件下，排放水平較穩態EGR優化MAP控製方法有瞭較大改進。
위대모중형시유궤EGR계통진행배방우화화류량정학공제，기우배방우화원칙，채용료일충절기벌배합EGR벌공제EGR류량적전공황량벌연합공제계통。선후재반실물실시방진평태화태가상진행료공제기근종효과화배방개진효과적험증。결과표명：소설계적공제기능재각충공황하정학공제공연비；재측시공황조건하，배방수평교은태EGR우화MAP공제방법유료교대개진。
For the emission optimization and precise control of EGR system of a heavy-duty diesel engine, an all-conditions two valve joint control system is adopted, in which both EGR valve and throttle valve are combined to accurately control the flow rate of EGR. Tests for verifying the tracking effects of controller and the effects of e-mission improvement are carried out on both semi-physical real-time simulation platform and test bench successive-ly . The results show that the controller designed can precisely control air/fuel ratio in all working conditions and un-der tested condition, the emission level has relatively significant improvement compared with steady-state EGR opti-mization MAP control.
