Variable valve actuation(VVA) is one of the most efficient methods to achieve homogeneous charge compression ignition(HCCI) and transition between HCCI and SI combustion on gasoline engine.

• 全可变气门技术是目前汽油机上实现均质充量压缩燃烧(HCCI)及HCCI与火花点火(SI)燃烧模式之间过渡最为切实有效的技术途径之一。