Is it necessary to replace a damaged exhaust pipe heat shield?
1 Answers
It is necessary to replace a damaged exhaust pipe heat shield. Because the exhaust pipe remains in a high-temperature state, without a heat shield or with a damaged one, the heat can cause the car floor temperature to rise, affecting the interior temperature and posing a risk of melting the felt layer covering the car floor. Below is an introduction to the car heat shield: Function: The main role of the car heat shield component is to reduce the transfer of radiant heat flow. When the vehicle is idling or moving at low speeds, it reduces radiant heat flow and also has a certain effect in blocking hot air from directly convecting heat with the car body. Therefore, during this time, it is preferable for the heat shield to dissipate heat as quickly as possible. At high speeds: Its role is basically limited to reducing the transfer of radiant heat flow, because at this time, the airflow under the car body is faster, providing a cooling effect on the heating components, meaning the convective heat transfer will benefit the heat dissipation of the car's bottom parts. If the bottom structure is poorly designed, causing severe turbulence in the airflow, the convective heat transfer coefficient will rapidly increase, leading to poor heat exchange with the car body. This situation needs to be avoided during the design phase.
