Abstract
Most modern cars use electronically controlled fuel injection engines. Because the fuel injection rate is strictly in accordance with the intake port, the combustion is more thorough and cleaner, so it usually has better emission performance. However, when there is a problem with it, it will have a great impact on its emission characteristics. By conducting exhaust emission experiments under WLTC, NEDC, and FTP-75 operating conditions, the emission characteristics of exhaust gases under various operating conditions were compared. Through comparative analysis, it is concluded that under WLTC conditions, the strictness of vehicle exhaust emissions has increased compared with the past, which provides a basis for automobile manufacturers to manage vehicle exhaust in the new technical environment.
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