---
title: "Particulate Filter"
industry: "Motor Vehicle Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:PARTICULATE_FILTER"
  data_integrity_hash: "b97ea7eb5554acca362afa708f707732"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:PARTICULATE_FILTER"
  data_source_uri: "https://cnfx.com/llms/industry/motor-vehicle-manufacturing/product/particulate-filter.md"
  official_resource_url: "https://cnfx.com/industry/motor-vehicle-manufacturing/product/particulate-filter"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-650°C, 0-2 bar differential pressure"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 8
    unit: "g"
    consequence: "Thermal runaway from uncontrolled soot oxidation (exothermic reaction: C + O₂ → CO₂, ΔH = -393.5 kJ/mol) exceeding ceramic substrate melting point (1700°C for cordierite)"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Ash accumulation exceeding 40 g/L from lubricant additives (CaSO₄, Zn₃(PO₄)₂)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Ash-specific filter design with segmented channels and ultrasonic cleaning ports"
  - node_2:
      trigger: "Thermal shock from 200°C to 800°C in &lt;60 seconds during regeneration"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Graded porosity structure with 45-65% porosity gradient and controlled regeneration at 15°C/s ramp rate"
bom_nodes:
  filter-substrate:
    type: "component"
    urn: "URN:CNFX:ME:FILTER_SUBSTRATE"
    interface_type: "physical-logic-coupled"
  catalytic-coating:
    type: "component"
    urn: "URN:CNFX:ME:CATALYTIC_COATING"
    interface_type: "physical-logic-coupled"
  canning-housing:
    type: "component"
    urn: "URN:CNFX:ME:CANNING_HOUSING"
    interface_type: "physical-logic-coupled"
  inletoutlet-cones:
    type: "component"
    urn: "URN:CNFX:ME:INLETOUTLET_CONES"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 16889:2008 - HYDRAULIC FLUID POWER - FILTERS - MULTI-PASS METHOD FOR EVALUATING FILTRATION PERFORMANCE"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/ASHRAE 52.2-2017 - METHOD OF TESTING GENERAL VENTILATION AIR-CLEANING DEVICES FOR REMOVAL EFFICIENCY BY PARTICLE SIZE"
    scope: "Verified Engineering Specification"
  - standard: "DIN 71460-1:2010 - AIR FILTERS FOR PASSENGER COMPARTMENTS - PART 1: TEST FOR PARTICULATE FILTRATION"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/motor-vehicle-manufacturing/product/particulate-filter.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "602d816ce6604d9646709221add8719bbee4d2426f8e1c3e60550e94aaf80636"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Particulate Filter

## 1. Technical Definition
A filtration device that captures and removes particulate matter from exhaust gases.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-650°C, 0-2 bar differential pressure**. Failure boundary: **Soot loading exceeding 8 g/L filter volume, thermal stress exceeding 1200°C for &gt;30 seconds**, Mechanism: **Thermal runaway from uncontrolled soot oxidation (exothermic reaction: C + O₂ → CO₂, ΔH = -393.5 kJ/mol) exceeding ceramic substrate melting point (1700°C for cordierite)**.

### 2.1 Analytical Physics Model
Governed by the **Hansen Solubility Distance (HSP)**:

> **Primary Equation**: $R_a = \sqrt{4\Delta\delta_d^2 + \Delta\delta_p^2 + \Delta\delta_h^2}$  
> **Engineering Impact**: Predicts seal/gasket swelling when exposed to CIP chemicals.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| \delta_d | Dispersive | Engineering Constant |
| \delta_p | Polar | Engineering Constant |
| \delta_h | Hydrogen | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Ash accumulation exceeding 40 g/L from lubricant additives (CaSO₄, Zn₃(PO₄)₂) | 8 | Backpressure increase to 250 mbar causing engine derating | Ash-specific filter design with segmented channels and ultrasonic cleaning ports |
| Thermal shock from 200°C to 800°C in &lt;60 seconds during regeneration | 8 | Radial cracking in silicon carbide substrate (CTE mismatch: 4.0×10⁻⁶/K vs 2.6×10⁻⁶/K) | Graded porosity structure with 45-65% porosity gradient and controlled regeneration at 15°C/s ramp rate |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Exhaust Gas Analyzer**, **Automated Welding System**, **Ceramic Coating Oven**  
**Downstream Applications**: Diesel Passenger Vehicles, Commercial Trucks, Construction Equipment  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What are the main differences between silicon carbide and cordierite ceramic filters?
**A**: Silicon carbide filters offer higher thermal conductivity and better thermal shock resistance, making them suitable for high-temperature applications. Cordierite filters are lighter and more cost-effective, with good filtration efficiency for standard operating conditions.

### Q: How does the catalytic coating enhance particulate filter performance?
**A**: The catalytic coating promotes oxidation of captured particulate matter at lower temperatures, enabling passive regeneration. This reduces soot accumulation, prevents filter clogging, and extends service intervals while maintaining optimal exhaust flow.

### Q: What maintenance is required for sintered metal particulate filters?
**A**: Sintered metal filters require periodic inspection for ash accumulation and potential thermal damage. They typically feature cleanable/reusable designs with regeneration cycles, but may need professional cleaning every 100,000-150,000 miles depending on operating conditions.

## 6. Manufacturing Compliance
- ISO 16889:2008 - HYDRAULIC FLUID POWER - FILTERS - MULTI-PASS METHOD FOR EVALUATING FILTRATION PERFORMANCE
- ANSI/ASHRAE 52.2-2017 - METHOD OF TESTING GENERAL VENTILATION AIR-CLEANING DEVICES FOR REMOVAL EFFICIENCY BY PARTICLE SIZE
- DIN 71460-1:2010 - AIR FILTERS FOR PASSENGER COMPARTMENTS - PART 1: TEST FOR PARTICULATE FILTRATION

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Particulate Filter](https://cnfx.com/industry/motor-vehicle-manufacturing/product/particulate-filter)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: PARTICULATE_FILTER | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: fe3b64a4
