Dashboard

1. • Auto Refesh can be enabled/disabled as a toggle - this will control whether the application regularly fetches data.
   • Manual Refresh can be used to trigger a fetch of data when Auto Refresh is disabled.
2. • Data Fetch Latency represents the average time taken for your OBD2 device to fetch data from your vehicle's ECU.
   • Odometer. Your vehicle's odometer reading.
3. DPF Regeneration Status. The image of the DPF will glow red during regeneration.
4. Soot Mass Change. This figure represents the change of soot mass over the last minute.
5. DPF Capacity. This progress bar indicates how full your DPF is of soot. As the capacity reaches 100%, an active regeneration will be triggered by the ECU.
6. Individual data points. Refer to Data Points for further information on what each data point means.
7. Vehicle Metadata. Shows ECU hardware/software part numbers, software versions, engine code, VIN year, and engine type.

Data Points

• Soot Mass Calculated
  • This is an estimated value of soot mass within the DPF derived from the car's onboard diagnostics system. The calculation is based on various parameters such as fuel consumption, engine operating conditions, driving patterns, and sensor inputs. The ECU uses these factors to estimate how much soot is likely to have accumulated in the DPF.
  • This is the value used throughout the app for calculating soot load and change.
• Distance Since Regeneration
  • The distance covered by the vehicle since the last regeneration.
• Time Since Regeneration
  • The time spanned with the engine running since the last regeneration.
• Oil Ash Residue
  • The load of oil ash within your DPF. Oil ash is the non-combustible byproduct of running your engine.
  • This value is essentially the lifespan of your DPF. As oil ash increases, the soot capacity of your DPF decreases, leading to more frequent regenerations.
• Low Pressure EGR Closing
  • Closed position of the Low Pressure EGR valve, 100% is fully closed, 0% is fully open.
• High Pressure EGR Closing
  • Closed position of the High Pressure EGR valve, 100% is fully closed, 0% is fully open.
• DPF Input Gas Temperature
  • Temperature of the exhaust gases as they enter the Diesel Particulate Filter.
• DPF Output Gas Temperature
  • Temperature of the exhaust gases as they exit the Diesel Particulate Filter.
• DPF Surface Temperature
  • Temperature on the surface of the Diesel Particulate Filter.
• Soot Mass Measured
  • Contrary to the naming, this is also a calculation just like Soot Mass Calculated, but with a different calculation.
  • In most cases, this value is unhelpful and often is negative. It will typically converge with Soot Mass Calculated as the DPF reaches 100% capacity.
  • Under fault conditions (sensor failure), this value becomes the only way to observe soot load.
• Post Injection 1, 2, and 3
  • These refer to additional fuel injection events that occur after the main fuel injection during the engine's combustion cycle. Post-injections are used primarily to increase exhaust gas temperatures.
• Differential Pressure
  • The pressure difference measured across the DPF.

The Regeneration Process

"During regular driving, the DPF gradually accumulates soot. This accumulation is monitored through a "Soot Mass Calculated" metric. As this figure increases, the corresponding progress bar fills up. As the progress bar reaches 100%, the vehicle will initiate active regeneration. During active regeneration, the ECU will inject extra fuel on each duty cycle to increase exhaust gas temperatures to around 600°C.

Signs of active regeneration include:

• The DPF will begin to glow red
• A notification sound will play
• Soot mass will begin to decrease rapidly
• Exhaust gas temperatures will rise significantly