Particulate Filter for Motor Vehicle Manufacturing

Product Specifications

Technical details and manufacturing context for Particulate Filter

Definition

A particulate filter is a critical component within exhaust gas management systems, specifically designed to trap and remove solid particulate matter (PM) from engine or industrial process exhaust streams. It functions as a physical barrier that captures soot, ash, and other fine particles before the cleaned gas is released into the atmosphere, playing a vital role in reducing emissions and meeting environmental regulations. In motor vehicle manufacturing, these filters are commonly used in diesel engines to meet stringent emission standards. The filter's substrate is typically made from porous ceramic materials such as silicon carbide or cordierite, or from sintered metal, which provide the necessary thermal and mechanical stability. The filter operates by forcing exhaust gas through its porous walls, where particles are trapped. Over time, accumulated soot must be removed through a process called regeneration, which involves burning off the soot at high temperatures to restore filtration efficiency. Key performance parameters include filtration efficiency (≥99.9% for particles >0.1 μm per ISO 19438), dust holding capacity (15–60 g per ISO 4020), maximum operating temperature (600–900 °C), operating pressure (1.0–1.6 MPa), pressure drop (2–8 kPa per ISO 3968), cell density (200–400 cpsi), wall thickness (0.3–0.5 mm), overall dimensions (150–300 mm), weight (2–8 kg), and material grade (SiC per ASTM C560). These values are reference ranges and must be verified for the specific model and application. Always confirm with the legal manufacturer or supplier to ensure the filter meets your requirements and applicable standards.

Working Principle

Exhaust gas containing particulate matter is forced through a porous filter substrate, typically made of ceramic or sintered metal. The particles are physically trapped within the filter's porous walls or on its surface. For filters like Diesel Particulate Filters (DPFs), accumulated soot is periodically burned off through a process called regeneration to restore filtration efficiency. The regeneration process involves raising the exhaust temperature to oxidize the soot, converting it to carbon dioxide and ash. This ensures the filter continues to operate effectively over its service life.

Common Materials

Silicon Carbide Ceramic, Cordierite Ceramic, Sintered Metal

Technical Parameters

Parameter	Typical range	Notes & selection driver
Filtration Efficiency	≥99.9 %	For particles >0.1 μmISO 19438
Dust Holding Capacity	15–60 g	Higher capacity extends service lifeISO 4020
Max Operating Temperature	600–900 °C	Exceeding may cause thermal damage
Operating Pressure	1.0–1.6 MPa
Pressure Drop	2–8 kPa	Higher drop reduces engine efficiencyISO 3968
Cell Density	200–400 cpsi	Higher density improves filtration but increases backpressure
Wall Thickness	0.3–0.5 mm	Thinner walls reduce pressure drop
Overall Dimensions	150–300 mm	Diameter or length depending on design
Weight	2–8 kg	Affects vehicle weight distribution
Material Grade	SiC	Silicon carbide for high thermal stabilityASTM C560

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Filter Substrate Part
The porous monolithic structure that physically traps particulate matter. It provides the surface area and pore structure for filtration.

Material: Silicon Carbide or Cordierite Ceramic
Catalytic Coating Part
A layer applied to the substrate to lower the ignition temperature of accumulated soot, facilitating regeneration. Often contains platinum or palladium.

Material: Platinum Group Metals (PGM) on Alumina Washcoat
Canning / Housing Part
The metal outer shell that contains and protects the fragile filter substrate, providing structural support and connection points to the exhaust system.

Material: Stainless Steel
Inlet/Outlet Cones Part
Tapered sections at the ends of the housing that guide exhaust gas flow into and out of the filter substrate smoothly, minimizing turbulence and pressure loss.

Material: Stainless Steel

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Exhaust Gas Management

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Carrier Gas Supply System

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Sample Intake System

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Sampling System (for aspirated detectors)

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Manufacturers of Particulate Filter

5 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Cangzhou Sefu Ceramic New Materials Co., Ltd.

Cangzhou, Hebei, CN

Also makes: Diesel Particulate Filter (DPF), Catalyst Substrate, Precision Casting Runner System