High-Performance Diesel Engine Ceramic Particulate Filter
(CDPF/DOC)
This advanced ceramic particulate filter serves as a core component
in diesel engine exhaust aftertreatment systems. Engineered with
precision ceramic materials featuring a high-density honeycomb
porous structure, it effectively captures and catalytically
oxidizes carbon soot particles (PM) from exhaust gases. Essential
for meeting China VI and higher emission standards while improving
engine environmental performance.
Working Principle
Exhaust gases flow through the honeycomb ceramic substrate, where
carbon soot particles are intercepted and deposited on the
micropore surfaces. During system regeneration, accumulated
particulate matter undergoes oxidation and cleaning at elevated
temperatures through catalytic action, enabling periodic filter
cleaning and maintaining sustained high-efficiency operation.
Core Technical Features
| Feature | Parameter/Description | Technical Advantage |
|---|
| Structural Design | Wall-flow honeycomb ceramic, cell density 200-300 CPSI | Balances high filtration efficiency with low pressure drop |
| Filtration Mechanism | Combination of depth filtration and surface filtration | Capture efficiency >95% for nano-scale carbon soot particles |
| Material System | Cordierite/SiC-based advanced engineering ceramic | Combines high porosity, thermal resistance, and mechanical strength |
| Regeneration Compatibility | Compatible with catalytic coatings (customizable DOC/SCR coating) | Supports both passive and active regeneration, enhancing system
durability |
Physicochemical Performance Parameters
| Performance Indicator | Unit | Typical Value | Test Standard |
|---|
| Coefficient of Thermal Expansion | ×10⁻⁶/K | ≤5.0 | ASTM E831 |
| Compressive Strength (A-axis) | MPa | ≥7.5 | ISO 20504 |
| Compressive Strength (B-axis) | MPa | ≥1.0 | ISO 20504 |
| Apparent Porosity | % | 41±5 | ASTM C830 |
| Thermal Conductivity | W/(m*K) | 23±11 | ASTM E1225 |
| Softening Temperature | °C | >1300 | ASTM C583 |
| Average Pore Size | μm | 13±2 | Mercury Intrusion Porosimetry |
| Thermal Shock Resistance | -- | No cracking after 3 cycles of water quenching at 550°C | Enterprise Standard |
| Maximum Operating Temperature | °C | 1200 (short-term) | -- |
Dimensions & Customization Capabilities
Standard Geometry Range
- Shapes: Cylindrical, Oval, Race-track
- Cell Density: 200 - 300 CPSI (cells per square inch)
- Wall Thickness: 0.23 - 0.3 mm
- Outer Diameter Range: 50 - 330 mm
- Height Range: 50 - 350 mm
- Dimensional Tolerance: ±1.5 mm (can be tightened per request)
Customization Services
We provide tailored solutions based on customer engine parameters,
installation space, and performance requirements:
- Non-standard dimensions and special cross-sectional shapes
- Optimized matching of cell density and wall thickness
- Integrated catalytic coating (DOC, SCR, Four-way catalyst)
application
- Technical support for canning and assembly
Application Benefits
Environmental Benefits
- Significantly reduces PM (Particulate Matter) emissions, complying
with the strictest global emission regulations
- Effectively reduces visible black smoke pollutants, improving air
quality
Economic Benefits
- Long-life design reduces replacement frequency and maintenance
costs
- Optimized backpressure design minimizes impact on engine power and
fuel economy
- Good resistance to sulfur and phosphorus poisoning, enhancing
durability under complex fuel conditions
System Advantages
- Excellent thermal stability and thermal shock resistance, suitable
for drastic temperature changes in diesel engines
- High mechanical strength ensures structural integrity under vehicle
vibration and impact
- Highly compatible with various aftertreatment systems (EGR, SCR,
etc.)
Quality Assurance
- Raw materials sourced from high-quality suppliers with full
traceability
- Fully automated extrusion and precision sintering processes ensure
product consistency
- 100% inspection for appearance, dimensions, and key performance
(crush strength, porosity)
- Validated through bench and vehicle emission testing
Match the Optimal Filtration Solution for Your Engine
Our engineering team provides full-process technical support, from
selection analysis and simulation calculations to prototype
testing, helping your products meet the latest environmental
requirements and enhance market competitiveness. Contact us for
more information.
