As early as the 1980s, insulation panels were used to shield high-temperature sources, especially those emitted by steam boosters and catalytic converters in automotive exhaust systems. The adjustment of the heat has local features that allow the heat to collect separately on the engine compartment and the individual components on the underbody, which happens to be the hottest parts.
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The optimization of the vehicle further shortens the distance between the exhaust system and the body structure, and the insulation of the insulation board becomes more important.
The new insulation panel is part of the overall solution for the underbody. It not only considers a single heat transfer problem, but also considers all aspects of the problem with a holistic approach. For example, in the "bottom-bottom" overall system, in addition to heat radiation and heat transfer, the effect of heat convection is also highlighted. New insulation panels are designed with thermal convection in mind.
For acoustic and aerodynamic reasons, the lower hood is introduced into the engine compartment, the air passage changes, and the traditional insulation panel design must change.
In today's car designs, especially in high-end cars, most of the engine compartment is covered, and the accumulation of heat increases the need for insulation, and the overall concept of insulation changes.
Therefore, today's insulation panels are used in the entire exhaust system area at the bottom of the car. Most insulation panels have versatile properties.
They meet the aerodynamic and acoustic needs of the vehicle while providing mechanical protection. Some insulation panels are also integrated into plastic components and will be integrated into the overall design of the underbody in the future for wider use.
Insulation board function
The primary characteristic of the insulation board is its strong reflectivity to heat, that is, the infrared radiation is reflected as much as possible. The strong side-guide heat allows heat to be transferred to the edge of the insulation panel and released to the environment at a suitable temperature. Strong vertical insulation reduces heat transfer to the body structure. The back side of the heat shield is also highly reflective, ie low emissivity, to minimize heat radiation to the body structure. Another feature of the insulation panel structure is that the convection of the surrounding air is utilized as much as possible to reduce the temperature of the insulation panel.
In the automotive industry, heat shields are used to protect heat sensitive parts of automobiles from excessive heat. These heat-sensitive parts include electronic components, fuel delivery pipes, fuel tanks, brake lines, noise-reducing anti-vibration damping pads, transmissions, dash/underbody/luggage area bases, damping and carpeting. In other words, on a modern car, the insulation board must be applied to all areas that extend from the engine compartment to the trunk. Due to the different heat levels in these areas, the design of the insulation panels varies.
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