车用发动机
車用髮動機
차용발동궤
2015年
2期
28-32,39
,共6页
杜巍%黄伟伟%何圣华%刘福水
杜巍%黃偉偉%何聖華%劉福水
두외%황위위%하골화%류복수
柴油机%进气预热%起动%扭矩%燃烧压力
柴油機%進氣預熱%起動%扭矩%燃燒壓力
시유궤%진기예열%기동%뉴구%연소압력
diesel engine%intake preheating%starting%torque%combustion pressure
为了改善某柴油机的起动特性,自行设计了柴油机进气火焰预热系统。利用基于时间的瞬时数据采集系统,测量了瞬时转速和缸内燃烧压力的变化规律,对不进气预热和进气预热条件下柴油机的起动特性进行了试验研究。试验结果表明:采用进气预热系统后,进气温度升高了18.5℃,柴油机起动过程中转速升高率增大,起动时间明显缩短;输出扭矩增大且波动明显减小;各个循环的最大燃烧压力升高且波动减小,燃油的着火滞燃期明显缩短,其着火过程中发生后燃、循环失火的概率明显减小,燃烧过程进行得更加充分,极大地改善了柴油机的起动性能。
為瞭改善某柴油機的起動特性,自行設計瞭柴油機進氣火燄預熱繫統。利用基于時間的瞬時數據採集繫統,測量瞭瞬時轉速和缸內燃燒壓力的變化規律,對不進氣預熱和進氣預熱條件下柴油機的起動特性進行瞭試驗研究。試驗結果錶明:採用進氣預熱繫統後,進氣溫度升高瞭18.5℃,柴油機起動過程中轉速升高率增大,起動時間明顯縮短;輸齣扭矩增大且波動明顯減小;各箇循環的最大燃燒壓力升高且波動減小,燃油的著火滯燃期明顯縮短,其著火過程中髮生後燃、循環失火的概率明顯減小,燃燒過程進行得更加充分,極大地改善瞭柴油機的起動性能。
위료개선모시유궤적기동특성,자행설계료시유궤진기화염예열계통。이용기우시간적순시수거채집계통,측량료순시전속화항내연소압력적변화규률,대불진기예열화진기예열조건하시유궤적기동특성진행료시험연구。시험결과표명:채용진기예열계통후,진기온도승고료18.5℃,시유궤기동과정중전속승고솔증대,기동시간명현축단;수출뉴구증대차파동명현감소;각개순배적최대연소압력승고차파동감소,연유적착화체연기명현축단,기착화과정중발생후연、순배실화적개솔명현감소,연소과정진행득경가충분,겁대지개선료시유궤적기동성능。
In order to improve the starting performance of diesel engine ,the inlet flame preheating system of diesel engine was designed based on the flame preheating plugs .The instantaneous speed and cylinder combustion pressure were measured with the instantaneous data acquisition system and the starting performance of diesel engine with and without intake preheating was researched .The experimental results showed that the speed rise rate increased and the starting time shortened when the intake temperature increased by 18 .5 ℃ by the preheating system .The output torque in the starting process also increased but with less fluctuation .The maximum combustion pressure at each cycle increased with the less fluctuation ,the ignition delay period shortened ,the probability of post‐combustion and misfire phenomenon dropped ,the combustion of mixture was more complete and therefore the starting performance of diesel engine improved .