Support Mats for Gasoline ATS

Three-way catalysts (TWC) are the mainstream solution for gasoline vehicle exhaust after-treatment. Depending on mounting position, operating temperatures typically range from 400°C to 950°C.

Due to thermal expansion coefficient differences between the metal shell and ceramic substrate, the gap expands as temperature rises—the mat must maintain sufficient holding force despite this gap growth.

In China VI applications, gasoline vehicles incorporate GPFs to reduce particulate emissions. Carbon accumulation on GPF surfaces creates backpressure, challenging the mat's holding force integrity over the full lifecycle.

Product Solutions

• KY1850HT (non-intumescent): Based on high-performance aluminosilicate fiber, delivers adequate holding force for most operating conditions. Where canning processes impose additional thickness requirements, KY1850HT-180K is the preferred alternative.

• KYE400P and WA100 (both non-intumescent, PCW-based): Compliant with EU REACH fiber regulations. WA100 offers superior holding force performance for extreme operating conditions.

• KY100MEU (bio-soluble): For applications with adequate substrate strength, REACH compliance requirements, and cost sensitivity.

Support Mats for Diesel ATS

Diesel exhaust after-treatment systems comprise combinations of DOC, DPF, SCR, ASC, and POC units.

Similar to TWC/GPF architectures, these consist of ceramic substrates and metal shells. Although operating temperatures are relatively moderate (250–650°C), larger system volumes typically demand higher holding forces.

Mat selection for diesel applications is diverse, requiring application engineers to identify the most cost-effective solution based on actual operating conditions.

Common options include:

• Intumescent: KY860

• Non-intumescent: KY1850HT, KY1850HT-180K, KY1858HT

For EU REACH compliance, alternatives include:

• PCW non-intumescent: KYE400P, WA100

• Bio-soluble: KY7000NC

Support Mats for Natural Gas Heavy-Duty ATS

Natural gas heavy-duty truck after-treatment systems combine the high temperatures of gasoline applications with the large dimensions of diesel systems, demanding higher holding forces and stricter performance and quality requirements.

Recommended Solutions

• Primary recommendation: WA100 (PCW non-intumescent) — delivers exceptional performance under extreme operating conditions.

• Cost-optimized alternative: KY1858HT (high-performance RCF non-intumescent) — when EU REACH compliance is not required.

• Value options: KY1850HT or KY1850HT-180K (RCF non-intumescent) — applicable when special engineering designs objectively reduce mat performance requirements.