---
title: "Dosing Control Unit (DCU)"
industry: "Motor Vehicle Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:DOSING_CONTROL_UNIT_DCU"
  data_integrity_hash: "35d40b956c0cf47e48398cfc82cd72b0"
  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:DOSING_CONTROL_UNIT_DCU"
  data_source_uri: "https://cnfx.com/llms/industry/motor-vehicle-manufacturing/product/dosing-control-unit-dcu.md"
  official_resource_url: "https://cnfx.com/industry/motor-vehicle-manufacturing/product/dosing-control-unit-dcu"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "2.5-10.0 bar injection pressure, -40°C to +125°C ambient temperature, 9-16 VDC supply voltage"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 12.5
    unit: "bar"
    consequence: "Diaphragm material (EPDM rubber) exceeds tensile strength at 12.5 bar, urea-water solution phase change at -11°C forms damaging crystals, solenoid coil demagnetization below 9 VDC"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Piezoelectric injector crystal fracture from 1500+ MPa cyclic pressure stress"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Silicon carbide reinforced crystal lattice with 2100 MPa tensile strength"
  - node_2:
      trigger: "CAN bus electromagnetic interference exceeding 200 V/m field strength"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Triple-shielded twisted pair wiring with ferrite chokes at 100 MHz resonance"
bom_nodes:
  microcontroller:
    type: "part"
    urn: "URN:CNFX:ME:MICROCONTROLLER"
    interface_type: "physical-logic-coupled"
  power-supply-circuit:
    type: "part"
    urn: "URN:CNFX:ME:POWER_SUPPLY_CIRCUIT"
    interface_type: "physical-logic-coupled"
  communication-interface:
    type: "part"
    urn: "URN:CNFX:ME:COMMUNICATION_INTERFACE"
    interface_type: "physical-logic-coupled"
  output-driver-circuits:
    type: "part"
    urn: "URN:CNFX:ME:OUTPUT_DRIVER_CIRCUITS"
    interface_type: "physical-logic-coupled"
  protective-housing:
    type: "part"
    urn: "URN:CNFX:ME:PROTECTIVE_HOUSING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "ISO 13849-1:2015 - SAFETY OF MACHINERY"
    scope: "Verified Engineering Specification"
  - standard: "CE MARKING - MACHINERY DIRECTIVE 2006/42/EC"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/motor-vehicle-manufacturing/product/dosing-control-unit-dcu.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "9d4da6df06be801c2087243264ccf54ea4d0580a266375405e9b98e1872604ad"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Dosing Control Unit (DCU)

## 1. Technical Definition
Electronic control module that precisely regulates AdBlue injection in diesel exhaust fluid systems

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **2.5-10.0 bar injection pressure, -40°C to +125°C ambient temperature, 9-16 VDC supply voltage**. Failure boundary: **Pressure exceeding 12.5 bar causes diaphragm rupture, temperature below -40°C crystallizes AdBlue, voltage below 9 VDC starves solenoid valves**, Mechanism: **Diaphragm material (EPDM rubber) exceeds tensile strength at 12.5 bar, urea-water solution phase change at -11°C forms damaging crystals, solenoid coil demagnetization below 9 VDC**.

### 2.1 Analytical Physics Model
Governed by the **Darcy-Weisbach Pressure Drop**:

> **Primary Equation**: $\Delta P = f \cdot \frac{L}{D} \cdot \frac{\rho v^2}{2}$  
> **Engineering Impact**: Critical for sizing CIP (Clean-In-Place) pump heads.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| f | Friction Factor | Engineering Constant |
| L | Pipe Length | Engineering Constant |
| v | Velocity | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Piezoelectric injector crystal fracture from 1500+ MPa cyclic pressure stress | 8 | AdBlue flow deviation exceeding ±2.5% from setpoint | Silicon carbide reinforced crystal lattice with 2100 MPa tensile strength |
| CAN bus electromagnetic interference exceeding 200 V/m field strength | 8 | Microcontroller memory corruption causing 100 ms+ control signal latency | Triple-shielded twisted pair wiring with ferrite chokes at 100 MHz resonance |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Microcontroller](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/microcontroller.md) `(Standalone System)`
- [Power Supply Circuit](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/power-supply-circuit.md) `(Standalone System)`
- [Communication Interface](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/communication-interface.md) `(Standalone System)`
- [Output Driver Circuits](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/output-driver-circuits.md) `(Standalone System)`
- [Protective Housing](https://cnfx.com/llms/industry/computer-electronic-and-optical-product-manufacturing/product/protective-housing.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **AdBlue Storage Tank**, **High-Precision Metering Pump**, **Exhaust Gas Temperature Sensor**  
**Downstream Applications**: Selective Catalytic Reduction (SCR) System, Diesel Exhaust Fluid (DEF) Injection System, Emission Control Assembly  

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

### Q: What is the primary function of this Dosing Control Unit?
**A**: The DCU precisely regulates AdBlue injection into diesel exhaust systems to enable selective catalytic reduction (SCR), converting harmful NOx emissions into nitrogen and water vapor for environmental compliance.

### Q: How does this DCU integrate with existing vehicle systems?
**A**: It connects via communication interfaces to the vehicle's ECU and sensors, monitoring exhaust conditions to calculate and deliver the exact AdBlue dosage needed for optimal SCR performance.

### Q: What environmental standards does this DCU help vehicles meet?
**A**: This control unit enables compliance with Euro 6, EPA Tier 4, and other global emissions regulations by ensuring precise AdBlue dosing for effective NOx reduction in diesel exhaust systems.

## 6. Manufacturing Compliance
- ISO 9001:2015 - QUALITY MANAGEMENT SYSTEMS
- ISO 13849-1:2015 - SAFETY OF MACHINERY
- CE MARKING - MACHINERY DIRECTIVE 2006/42/EC

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Dosing Control Unit (DCU)](https://cnfx.com/industry/motor-vehicle-manufacturing/product/dosing-control-unit-dcu)**

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

> **Reference ID**: DOSING_CONTROL_UNIT_DCU | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 52e5179d
