How to Perform EOL Test for Deutz Tier4F Engine

Deutz engine  EOL test (end of line) is required to ensure the EAT functionality. Conditions for the start of the
EOL-test:

Engine coolant temperature > 70 °C
Exhaust gas temperature after DOC (before SCR if CSF System) < 300°C
DEF tank filled to minimum level (>15%)The stationary condition must be met.
After the requirement of the test it must be confirmed with the release button (HW / CAN) on the instrument side.

 

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Test Procedure:
• Testing of system components (sensors, actuators, wiring, ECU)
There must be no active faults of the EAT system present
• Leak check, visual inspection
In normal operation, a pressure of 9 bar in the pressure line is built up in the dosing.
In this case should be no leakage at the lines and their connections.

Functional verification
• During the EOL tests, the machine must be parked and it must be ensured that no additional functions can be activated to disrupt the process.
• During the regeneration the plausibility of the measured values of the individual sensors is checked.
• The temperature sensors before and after DOC are checked for the correct driving position (interchangeability).

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• The functionality of the SCR system is on the evaluation of the NOx conversion rate. The NOx values are compared before and after the SCR catalyst. When setting a difference between the values after the DEF dosing, the functionality is confirmed.
• The total EOL test is deemed passed when the temperature sensors before / after DOC are installed correctly, a NOx conversion rate reaches> 50% and no error is set during regeneration.