{"title":"利用空气喷射可变涡流进气系统减少汽车直喷柴油机的废气排放","authors":"Zhong-chang Liu, Xunjun Liu, Zhaohe Zhang","doi":"10.1109/IVEC.1999.830642","DOIUrl":null,"url":null,"abstract":"An air injection variable swirl inlet system (AIVSIS) by means of injecting air into helical intake passage for a diesel engine was developed. Steady flow rig test results showed that AIVSIS is able to increase or decrease the swirl strength in the cylinder at suitable injector position by different air injection directions. Position and air injection directions of injector, as well as nozzle hole diameter and air injection pressure were determined. Diesel engine test results showed that AIVSIS hardly affects volumetric efficiency in the cylinder. At lighter load operating conditions of 1500 rpm, the performance and the trade-off between NO/sub x/ and particulate emission (PT), brake specific fuel consumption (BSFC) are all improved using AIVSIS to reduce swirl strength without obvious increase of CO emission, but THC emission increases a little. At heavier load operating conditions, the performance and PT, THC and CO emissions are all improved using AIVSIS to increase swirl level, but at the same time, NO/sub x/ emission increases a little.","PeriodicalId":191336,"journal":{"name":"Proceedings of the IEEE International Vehicle Electronics Conference (IVEC'99) (Cat. No.99EX257)","volume":"221 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1999-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":"{\"title\":\"Reducing exhaust emissions from an automotive DI diesel engine by means of air injection variable swirl inlet system\",\"authors\":\"Zhong-chang Liu, Xunjun Liu, Zhaohe Zhang\",\"doi\":\"10.1109/IVEC.1999.830642\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"An air injection variable swirl inlet system (AIVSIS) by means of injecting air into helical intake passage for a diesel engine was developed. Steady flow rig test results showed that AIVSIS is able to increase or decrease the swirl strength in the cylinder at suitable injector position by different air injection directions. Position and air injection directions of injector, as well as nozzle hole diameter and air injection pressure were determined. Diesel engine test results showed that AIVSIS hardly affects volumetric efficiency in the cylinder. At lighter load operating conditions of 1500 rpm, the performance and the trade-off between NO/sub x/ and particulate emission (PT), brake specific fuel consumption (BSFC) are all improved using AIVSIS to reduce swirl strength without obvious increase of CO emission, but THC emission increases a little. At heavier load operating conditions, the performance and PT, THC and CO emissions are all improved using AIVSIS to increase swirl level, but at the same time, NO/sub x/ emission increases a little.\",\"PeriodicalId\":191336,\"journal\":{\"name\":\"Proceedings of the IEEE International Vehicle Electronics Conference (IVEC'99) (Cat. No.99EX257)\",\"volume\":\"221 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1999-09-06\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"4\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of the IEEE International Vehicle Electronics Conference (IVEC'99) (Cat. No.99EX257)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/IVEC.1999.830642\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the IEEE International Vehicle Electronics Conference (IVEC'99) (Cat. No.99EX257)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IVEC.1999.830642","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Reducing exhaust emissions from an automotive DI diesel engine by means of air injection variable swirl inlet system
An air injection variable swirl inlet system (AIVSIS) by means of injecting air into helical intake passage for a diesel engine was developed. Steady flow rig test results showed that AIVSIS is able to increase or decrease the swirl strength in the cylinder at suitable injector position by different air injection directions. Position and air injection directions of injector, as well as nozzle hole diameter and air injection pressure were determined. Diesel engine test results showed that AIVSIS hardly affects volumetric efficiency in the cylinder. At lighter load operating conditions of 1500 rpm, the performance and the trade-off between NO/sub x/ and particulate emission (PT), brake specific fuel consumption (BSFC) are all improved using AIVSIS to reduce swirl strength without obvious increase of CO emission, but THC emission increases a little. At heavier load operating conditions, the performance and PT, THC and CO emissions are all improved using AIVSIS to increase swirl level, but at the same time, NO/sub x/ emission increases a little.
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