Aiming at a parallel hybrid electric vehicle (HEV), a design method of degree of hybridization (DOH), mainly about the constraint, side value condition and compute method of DOH was introduced.

• 摘要提出了并联型混合动力汽车的混合度设计方法，重点讨论混合度设计的约束条件、边值条件及其计算方法。