FixVault

Valve Train: Notes

The valve opening times have been optimized with regard to the change in charging and mixture preparation.

N74 Valve Stroke Curves 

Fig 1: N74 Valve Stroke Curves
G06896843Courtesy of BMW OF NORTH AMERICA, INC.
INDEX EXPLANATION REFERENCE CHART

Index Explanation
1 Valve lift [mm]
2 Crank angle [°CA]
3 Exhaust valve opens
4 Intake valve opens
5 Opening period, exhaust valve
6 Exhaust valve closes
7 Intake valve closes
8 Opening period, intake valve