Natural gas engines have widely been developed in the world due to the decrease of oil resources and the strictness of exhaust regulations. 由於石油資源的逐漸枯竭和排放法規的日益嚴格，使天然氣發動機在全世界得到廣泛地發展。
The results show that the selected regression model is reliable, which can provide credible data for calculation of engine waste heat utilization. 結果表明，回歸模型具有較高的可信度，可為天然氣發動機的廢熱利用提供相關數據。
