车用发动机
車用髮動機
차용발동궤
2014年
3期
29-32
,共4页
段俊法%刘福水%孙柏刚
段俊法%劉福水%孫柏剛
단준법%류복수%손백강
氢内燃机%进气道燃料喷射%混合气形成%均匀性%喷射相位
氫內燃機%進氣道燃料噴射%混閤氣形成%均勻性%噴射相位
경내연궤%진기도연료분사%혼합기형성%균균성%분사상위
hydrogen internal combustion engine%intake port fuel injection%mixture formation%uniformity%injection timing
以1台4缸进气道燃料喷射内燃机为基础，建立了包含进气管道和气缸的氢内燃机进气系统三维仿真模型。提出用混合气不均匀性系数来评价氢-空气混合状况，仿真研究了氢内燃机边界条件下的进气气流运动规律和混合过程，发现氢-空气混合状况主要取决于气流的搬运作用和扩散面积。探讨了氢气喷射相位和喷射压力对氢-空气混合速度和混合均匀性的影响，并以不均匀性系数为指标优化了 PFI氢内燃机不同转速和当量比下的喷射相位与喷射压力。
以1檯4缸進氣道燃料噴射內燃機為基礎，建立瞭包含進氣管道和氣缸的氫內燃機進氣繫統三維倣真模型。提齣用混閤氣不均勻性繫數來評價氫-空氣混閤狀況，倣真研究瞭氫內燃機邊界條件下的進氣氣流運動規律和混閤過程，髮現氫-空氣混閤狀況主要取決于氣流的搬運作用和擴散麵積。探討瞭氫氣噴射相位和噴射壓力對氫-空氣混閤速度和混閤均勻性的影響，併以不均勻性繫數為指標優化瞭 PFI氫內燃機不同轉速和噹量比下的噴射相位與噴射壓力。
이1태4항진기도연료분사내연궤위기출，건립료포함진기관도화기항적경내연궤진기계통삼유방진모형。제출용혼합기불균균성계수래평개경-공기혼합상황，방진연구료경내연궤변계조건하적진기기류운동규률화혼합과정，발현경-공기혼합상황주요취결우기류적반운작용화확산면적。탐토료경기분사상위화분사압력대경-공기혼합속도화혼합균균성적영향，병이불균균성계수위지표우화료 PFI경내연궤불동전속화당량비하적분사상위여분사압력。
A 3D simulation model of air intake system including intake pipe and cylinder was built based on a 4-cylinder and in-take port fuel injection hydrogen internal combustion engine .The non-uniformity coefficient was put forward to evaluate the mixing condition of hydrogen-air mixture .The intake air flow movement and mixing process of hydrogen internal combustion engine in the boundary conditions was simulated and researched with the model .It was found that the key factors for mixing condition were airflow carrying function and diffusion area .In addition ,the influence of hydrogen injection pressure and timing on hydrogen-air mixing velocity and uniformity was investigated and the injection timing and pressure of different engine speed and equivalent ratio were optimized according to the non-uniformity coefficients .
