| Machine | Volvo ECR235EL (short-radius excavator) |
|---|---|
| Engine | 175 hp stock |
| ECU | TRW EMS2.3 |
| Solution | Stage 1 + AdBlue/SCR off* + DPF off* + EGR off* |
| Read / write | EMS2.3 read, plus ACM read for the AdBlue solution |
The situation
The ECR235EL is a short-radius excavator for tight urban sites and road jobs, where it has to swing in one lane and still move material at a full rate. The 175 hp engine under the TRW EMS2.3 has reserve for that. The after-treatment does not: AdBlue supply and monitoring, DPF regenerations and an EGR system that fouls the intake all produce faults over time, and each fault can end in derate.
The contractor wanted more output at the stick and an excavator that does not stop for after-treatment faults in the middle of a job.
What we did
The EMS2.3 was read and the file developed for this software version. One point is specific to this platform: for the AdBlue solution on the EMS2.3, the after-treatment control module (ACM) has to be read as well, because the SCR logic is not handled by the engine ECU alone.
- Stage 1: 175 → 210 hp with a matching torque curve, injection quantity, rail pressure and boost adjusted within the limits of the stock hardware – more torque where the hydraulic pump demands it.
- AdBlue/SCR: dosing and level monitoring deactivated in software across engine ECU and ACM, related DTCs and the derate strategy handled. The machine no longer depends on DEF supply.
- DPF: regeneration logic disabled, back-pressure model and sensors neutralised.
- EGR: valve closed in software – clean intake, no recirculated soot, stable combustion temperatures.
Checksums corrected and the files written back to both modules.
The result
+35 hp and faster cycle times at the stick, no regenerations, no AdBlue warnings and no derate. For the contractor this means fewer stops and a machine that behaves the same at the end of the shift as at the start. For dealers: on the EMS2.3, send the ACM read together with the engine ECU read – without it the AdBlue solution cannot be developed.
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* Emission-related solutions (DPF, EGR, AdBlue/SCR) are intended for off-road, agricultural, export and motorsport use only, where permitted by local law. The operator is responsible for legal use in their market.
