Exhaust Aftertreatment System
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This page explains how Diesel Oxidation Catalyst (DOC) is classified within Motor Vehicle Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
An exhaust aftertreatment device that oxidizes carbon monoxide (CO) and hydrocarbons (HC) in diesel exhaust gases to reduce emissions.
Technical details and manufacturing context for Diesel Oxidation Catalyst (DOC)
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Substrate Diameter | 143.8–304.8 mm | Matches standard diesel exhaust pipe sizes |
| Substrate Length | 76.2–152.4 mm | Determines catalyst volume and conversion efficiency |
| Cell Density | 200–400 cpsi | Higher density increases surface area but may increase backpressure |
| Wall Thickness | 0.1–0.2 mm | Thinner walls reduce backpressure and improve light-off |
| Operating Temperature Range | 200–650 °C | Below 200°C light-off not achieved; above 650°C thermal aging |
| Maximum Continuous Temperature | 650 °C | Exceeding may cause sintering of precious metals |
| Maximum Exhaust Flow Rate | 300–1200 kg/h | Based on engine displacement and application |
| Pressure Drop at Rated Flow | ≤3 kPa | Higher pressure drop reduces engine efficiency |
| Conversion Efficiency (CO) | ≥90 % | At operating temperature and space velocity |
| Conversion Efficiency (HC) | ≥80 % | At operating temperature and space velocity |
| Precious Metal Loading | 30–70 g/ft³ | Typically Pt/Pd; higher loading improves durability |
| Substrate Material | Cordierite | Low thermal expansion, high thermal shock resistance |
| Canning Material | SS409/SS304 | Stainless steel for corrosion resistance |
| Weight | 5–20 kg | Depends on substrate size and canning |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
Commonly used trade names and technical identifiers for Diesel Oxidation Catalyst (DOC).
This component is essential for the following industrial systems and equipment:
| system: | Model the exotherm and interaction with DPF, SCR, dosing, EGR and thermal-management controls. |
| exhaust: | Provide mass-flow and temperature histograms, engine-out CO/HC/NOx/PM and oxygen, transient behavior and allowable system backpressure. |
| catalyst: | Confirm part number, substrate geometry and material, catalyst formulation, volume, canning, sensors and installation orientation. |
| fuel and oil: | Specify market fuel grade and sulfur limit, biodiesel fraction where relevant, ash-forming lubricant limits and oil consumption. |
| engine application: | Identify engine family, displacement/power, model year, certification class, duty cycle and baseline aftertreatment configuration. |
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.
Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.
A practical evidence checklist for RFQ preparation and supplier evaluation.
CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.
It promotes oxidation of carbon monoxide and hydrocarbons and may reduce the oxidizable portion of particulate emissions. Verified reduction percentages apply only to the named technology, engine/application group, fuel and operating criteria in the verification record.
There is no universal DOC operating or continuous-temperature range. Record the duty-cycle temperature distribution and confirm light-off, maximum inlet and bed temperature, excursion duration, aging limits and downstream thermal requirements for the selected catalyst and calibration.
Ceramic or metallic substrates and platinum-group-metal washcoats are common, but substrate material, cell geometry, washcoat composition, precious-metal formulation and stainless canning grade are application-specific. Obtain the selected manufacturer construction and material declaration.
Match engine family, model year and duty cycle; exhaust flow, composition and temperature histogram; fuel sulfur and lubricant consumption; allowable backpressure; packaging; upstream/downstream devices; emissions targets and applicable approval route. Require model-specific performance, durability and installation evidence.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.
Compare manufacturer profiles with relevant product and process capability.