6.2.1
Pressure calculation
In the ICC system, the compression pressure of each cycle is calculated with the polynomial
formula and the data of the piston position.
The peak firing pressure (002,
) is the highest measured pressure value in the crank
angle range between the start of the injection and approximately 20°CA after TDC.
The pressure increase is the difference between the firing pressure and the compression pressure.
The ICC sets the pressure increase limit eg to 40 bar to prevent mechanical overload to the engine.
Fig 6-3
ICC - pressure diagram
001
002
Cylinder pressure (bar)
Crank angle (°)
Legend
001
Pressure at 0°CA
002
Peak firing pressure
X52
AA00-9308-00AAA-043A-A
Operation Manual
Intelligent combustion control
Winterthur Gas & Diesel Ltd.
- 213 -
Issue 002 2018-11