HCCI Engines（均质压燃发动机) Diesel Engine Gasoline Engine HCCI Engine (compression ignition) (spark ignited) (Homogeneous Charge Compression Ignition) -fuel injector spark plug hot flame region hot flame region: nitric oxides nitric oxides smoke Low temperature combustion ultra low emissions http://www.osti.gov/fcvt/deer2001/coleman.pdf 《燃烧学基础》4，反应系统化学与热力学耦合 陈正(cz@pku.edu.cn) 12
《燃烧学基础》4，反应系统化学与热力学耦合 陈正 (cz@pku.edu.cn) HCCI Engines（均质压燃发动机） 12 http://www.osti.gov/fcvt/deer2001/coleman.pdf
活塞运行情况 Stroke:y=I+a-s (put piston first at TDC) s=acos0+(12-a2sin20)2 The cylinder volume at any crank angle is: BC V=P.+Ay=V+ B2 (1+a-S) When the piston is at TC(i.e.0=0 and s=/+a)the cylinder volume equals the clearance volume Ve b2 Maximum displacement volume:= L Compression ratio:1= VRc =Ve+Va Vie (from Prof.Ng) 《燃烧学基础》4，反应系统化学与热力学耦合 陈正(cz@pku.edu.cn)13
《燃烧学基础》4，反应系统化学与热力学耦合 陈正 (cz@pku.edu.cn) 活塞运行情况 13 (from Prof. Ng)
缸内体积变化 -1c--1ew0--swo Ve TC I'c= 8 to 12 for SI engines c Ve 12 to 24 for CI engines R=1 Typically,3 to 4 for small-and medium size BC engines:5 to 6 for large slow-speed CI engines 1500 Bottom Dead Center 1200 Com 900 pression Expansion Exhaust 60d 300 Top Dead Center -400 300 -200-100 0 100200300400 (from Prof.Ng) 《燃烧学基础》4，反应系统化学与热力学耦合 陈正(cz@pku.edu.cn) 14
《燃烧学基础》4，反应系统化学与热力学耦合 陈正 (cz@pku.edu.cn) 缸内体积变化 14 8 to 12 for SI engines 12 to 24 for CI engines Typically, 3 to 4 for small- and medium size engines；5 to 6 for large slow-speed CI engines (from Prof. Ng)
零维均质着火系统 零维均质着火系统（变容积） dY_W0. Pdv dt 0 m dt 15001 Bottom Dead Center 1200 900 eyejul ompres Expansion Exhaust 600 300 Top Dead Center -400300-200-100-0100200300400 wgji g21+-k1-emoW-o鬥 V。 陈正(cz@pku.edu.cn) 15
《燃烧学基础》4，反应系统化学与热力学耦合 陈正 (cz@pku.edu.cn) 零维均质着火系统 15 零维均质着火系统（变容积） k Wkk dt dY dt Vd m P We dt dT C N k V kkk 1 1 )(
Homogeneous Charge Compression Ignition [O]=19.6 ppm [NO]19.9 ppm 60 [NO,]=19.7 ppm 50 40 ,30A Without O.. ●Without O.,NO and NO, NO and NO, --INO,]=20 ppm ▲-NO1=20ppm [0J=19.6ppm -0,1=20ppm 三 80 [NO]=19.9 ppn 12 13 1.4 L.5 1000/Temperature [1/K] 60 [NO,】=19.7ppm Fig.4.Ignition delays computed over a large temper- 40 Without O ature range,for iso-octane as fuel with an equivalence p NO and NO. ratio of 0.3.for a pressure of 40 bar and 20 ppm of each 20 species studied. 30 20 -10 0 10 20 30 Crank Angle Degree [CAD] Fig.2.In-cylinder pressure and heat release rate traces J.-B.Masurier et al.Proceedings of the Combustion Institute 35(2015)3125-3132 without any species and with 20 ppm of each species separately injected 《燃烧学基础》4，反应系统化学与热力学耦合 陈正(cz@pku.edu.cn) 16
《燃烧学基础》4，反应系统化学与热力学耦合 陈正 (cz@pku.edu.cn) Homogeneous Charge Compression Ignition 16 J.-B. Masurier et al. / Proceedings of the Combustion Institute 35 (2015) 3125–3132