基于排放目标的汽油车闭环燃油控制优化
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- 英文论文题名：Optimization of Closed-loop Fuel Control of Gasoline Vehicle for Emission Target
- 论文作者：王勇 ; 孙冬野 ; 漆正刚
- 英文论文作者：Wang Yong ; Sun Dongye ; Qi Zhenggang ; Chongqing University ; State Key Laboratory of Mechanical Transmission ; Department of Automotive Engineering ; Chongqing College of Electronic Engineering ; Chongqing Chang'an Visteon Engine Control System Company
- 年：2016
- 作者机构：重庆大学机械传动国家重点实验室;重庆电子工程职业学院汽车工程学院;重庆长安伟世通发动机控制系统有限公司;
- 论文关键词：闭环燃油控制 ; 氧传感器 ; 自适应控制 ; 排放性能 ; 空燃比
- 英文论文关键词：closed-loop fuel control ; oxygen sensor ; adaptive control ; emission performance ; air-fuel ratio
- 会议召开时间：2016-10-26
- 会议录名称：2016中国汽车工程学会年会论文集
- 英文会议录名称：Proceedings of 2016 SAE-China Congress
- 语种：中文
- 分类号：U464.171
- 学会代码：QCGC
- 会议名称：2016中国汽车工程学会年会暨展览会
- 会议地点：中国上海
- 主办单位：中国汽车工程学会
- 学会名称：中国汽车工程学会
- 页数：1
- 文件大小：48k
- 原文格式：O
- 会议级别：全国
摘要
针对传统汽油发动机闭环燃油控制存在氧传感器老化后响应延迟导致的排放性能恶化和实际空燃比控制偏稀致使污染物综合转化率不高的问题,一方面引入氧传感器响应延迟自适应控制算法,以减轻甚至消除前氧传感器老化后对闭环燃油控制的不利影响,延长氧传感器使用寿命;另一方面引入空燃比控制算法,并结合前、后氧传感器信号联合控制偏置量,将实际空燃比调整至理论空燃比甚至少许偏浓的状态,从而有效提高排放污染物综合转化率。实车验证试验结果表明,氧传感器响应延迟自适应控制算法能有效减轻因前氧传感器老化而产生排放性能的恶化,空燃比控制算法能将污染物综合转化率提高20%以上。
In view of the issues of traditional closed- loop fuel control scheme for gasoline engine,i.e.the emission performance deterioration caused by response delay due to oxygen sensor aging and the low overall conversion rate of exhaust pollutants due to too lean a real air- fuel ratio,an adaptive control algorithm for the response delay of oxygen sensor is introduced for mitigating or even eliminating the adverse effects of aged upstream oxygen sensor on closed- loop fuel control and extending the service life of oxygen sensor on one hand,and an air-fuel ratiocontrol algorithm is also introduced and combined with associated control on bias by the signals of both upstream and downstream oxygen sensors to adjust the real air- fuel ratio to stoichiometric value or even a little richer for effectively enhance the overall conversion rate of exhaust pollutants on the other hand.The results of real vehicle verification test show that the adaptive control algorithm for the response delay of oxygen sensor can effectively mitigate the deterioration of emission performance caused by the aging of upstream oxygen sensor while the air-fuel ratio control algorithm can enhance the overall pollutant conversion rate by over 20%.
In view of the issues of traditional closed- loop fuel control scheme for gasoline engine,i.e.the emission performance deterioration caused by response delay due to oxygen sensor aging and the low overall conversion rate of exhaust pollutants due to too lean a real air- fuel ratio,an adaptive control algorithm for the response delay of oxygen sensor is introduced for mitigating or even eliminating the adverse effects of aged upstream oxygen sensor on closed- loop fuel control and extending the service life of oxygen sensor on one hand,and an air-fuel ratiocontrol algorithm is also introduced and combined with associated control on bias by the signals of both upstream and downstream oxygen sensors to adjust the real air- fuel ratio to stoichiometric value or even a little richer for effectively enhance the overall conversion rate of exhaust pollutants on the other hand.The results of real vehicle verification test show that the adaptive control algorithm for the response delay of oxygen sensor can effectively mitigate the deterioration of emission performance caused by the aging of upstream oxygen sensor while the air-fuel ratio control algorithm can enhance the overall pollutant conversion rate by over 20%.
引文
(一)本书仅收录摘要,全文刊载在《汽车工程》(2016年第10期)。