| Machine | Komatsu 931 (harvester) |
|---|---|
| Solution | Eco |
The situation
A harvester like the Komatsu 931 runs its engine for thousands of hours a year, and almost all of that time the engine is driving hydraulic pumps – crane, head, feed rollers and drive. The load is constant but rarely at full power. In that duty cycle the stock calibration, built for a broad range of markets and fuel qualities, leaves efficiency unused: the engine runs at higher rpm than the pumps need and uses more fuel than the work requires.
The forestry contractor wanted more power available at the crane and the head, with lower fuel consumption over the shift – without touching the engine hardware.
What we did
The engine ECU was read and the file developed for this software version.
- Eco: injection timing, injection quantity and boost adjusted within the limits of the stock hardware so that the engine delivers its torque at lower rpm and with a more complete combustion. The hydraulic pumps get the torque they demand without the engine speed having to rise, which is where the fuel saving comes from.
- Power: more usable torque in the working range – the head processes faster and the crane does not pull the engine down when several functions are used at once.
Checksum corrected and the file written to the ECU.
The result
A harvester that works harder on less fuel. For the contractor this means lower fuel cost per cubic metre, a quieter engine at the same output and a machine that holds its rpm under combined crane and head loads. Eco files for the 931 are developed from the original read of each machine – the software version decides what the file looks like.
Need a file for this machine?
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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.
