| Calc. | Parameter Name | Baseline Value | Parameter Ranges | ||
| Light Duty Engines | Heavy Duty Engines | Light Duty Engines | Heavy Duty Engines | ||
| Sliding Wear Volume | Friction Coefficient, μ | 0.1 | 0.1 | 0 - 0.5 | 0 - 0.5 |
| Max. Combustion Pressure, Pp (MPa) | 13 | 13 | 1 - 30 | 1 - 30 | |
| Valve Head Radius, Rv (m) | 0.018 | 0.1 | 0.008 - 0.03 | 0.05 - 0.5 | |
| Valve Seating Face Angle, θv (˚) | 45 | 45 | 20 - 50 | 20 - 50 | |
| Seat Insert Hardness, h (MPa) | 4900 | 4900 | 1000 - 9000 | 1000 - 9000 | |
| Sliding Wear Coefficient, k | 5.0E−05 | 5.0E−05 | 0 - 1.0E−03 | 0 - 1.0E−03 | |
| Slip at Interface, δ (m) | 8.0E−06 | 0.2E−03 | 0 - 1.0E−05 | 0 - 5E−03 | |
| Impact Wear Volume | Impact Wear Constant, K | 5.0E−14 | 5.0E−14 | 1.0E−18 - 1.0E−11 | 1.0E−18 - 1.0E−11 |
| Impact Wear Constant, n | 1 | 1 | 0.1 - 4 | 0.1 - 4 | |
| Valve Closing Velocity, v (m/s) | 0.3 | 0.01 | 0 - 2.5 | 0 - 1 | |
| Mass, m (kg) | 0.182 | 10 | 0 - 0.75 | 0 - 350 | |
| Total Number of Cycles, N | 50,000,000 | 50,000,000 | N/A | N/A | |
| Recession | Seating Face Angle, θs (˚) | 45 | 45 | 20 - 50 | 20 - 50 |
| Initial VSI* Facing Width, wi (m) | 2.0E−03 | 0.012 | 0.8E−03 - 6.0E−03 | 5E−03 - 80E−03 | |
| Initial VSI* Radius, Ri (m) | 0.0168 | 0.095 | 0.008 - 0.03 | 0.05 - 0.5 | |
| Wear Constant, j | 10 | 10 | 3 - 20 | 3 - 20 | |