Deutz engines are known for their reliable performance and efficiency. To ensure that the engine meets all the necessary requirements, an End of Line (EOL) test is conducted. This test is crucial for verifying the functionality of the Exhaust Aftertreatment (EAT) system. In this article, we will discuss the step-by-step procedure for performing the EOL test for a Deutz Tier4F engine.
Pre-Test Conditions
Before initiating the EOL test, ensure the following conditions are met:
- Engine Coolant Temperature: Must be above 70°C.
- Exhaust Gas Temperature after DOC: Must be below 300°C (before SCR if CSF System is present).
- DEF Tank Level: Must be filled to a minimum level of 15%.
- Stationary Condition: The engine must be stationary throughout the test.
- System Confirmation: Activate the test using the release button on the hardware (HW) or through the CAN interface on the instrument side.
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Test Procedure
- System Component Testing:
- Check all sensors, actuators, wiring, and the ECU for proper functionality.
- Ensure no active faults are present in the EAT system.
- Leak Check:
- Perform a visual inspection and test the pressure in the dosing line, which should build up to 9 bar.
- Verify there are no leaks at the lines or their connections.
- Functional Verification:
- With the engine parked, ensure that no additional functions are activated that could disrupt the testing process.
- Monitor the regeneration process and verify the plausibility of the measured values from the sensors.
- Check the temperature sensors before and after the DOC to ensure they are in the correct driving position and not interchangeable.
- Deutz Communicator:
- Assess the SCR system’s functionality based on the NOx conversion rate.
- Compare NOx values before and after the SCR catalyst.
- After DEF dosing, confirm the functionality if a significant difference is observed in the NOx values.
- Test Completion:
- The EOL test is considered successful if the temperature sensors are installed correctly, the NOx conversion rate exceeds 50%, and no errors are recorded during the regeneration process.
Conclusion
Completing the EOL test ensures that the Deutz Tier4F engine’s EAT system is functioning correctly and is compliant with emission standards. Make sure to follow all safety guidelines and operational procedures outlined in the Deutz operation and maintenance manual. Regularly conducting EOL tests can help in early detection of potential issues, maintaining the engine’s efficiency and longevity.