The HCNG engine calibrated must pass the European III emission standard and meet the power and economy requirement of HCNG vehicle.
标定后的HCNG发动机需满足国III排放标准，其动力性和经济性需保持与原型机相当的水平、并达到HCNG整车的要求。
The results show that all the three types of catalytic converters can make the HCNG engine meet enhanced environmentally friendly vehicle (EEV) emission standard.
试验结果表明：三种催化器都能使天然气掺氢发动机排放达到环境友好型汽车标准。
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