Which of the following is wrong in the description of the silencer?

The statement that suggests when the temperature is lower, the purification effect of the silencer is better is misleading because it oversimplifies the relationship between temperature and emissions control. Generally, exhaust systems, including silencers, are designed to function effectively at higher temperatures. This is because higher temperatures can enhance the catalytic process and improve the efficiency of exhaust gas after-treatment, which reduces harmful emissions.

In contrast, the other options accurately reflect key characteristics of a silencer. It is effective in reducing noise during both the intake and exhaust phases, which is critical for meeting noise regulations and improving comfort. Additionally, a well-functioning silencer can indeed contribute to better engine performance by allowing for optimal exhaust flow, which can enhance overall engine efficiency. Regular maintenance of the silencer is also vital, as it can become clogged or damaged over time, impacting its performance and potentially leading to increased noise and emissions.