2.2. N55 engine: Notes
The N55 engine is the successor to the N54 engine. Technical updates and modifications have made it possible to use only one exhaust turbocharger. The technical data have remained nearly identical, with reduced cost and improved quality.
Highlights
- Single turbocharger (TwinScroll)
- Air-gap-insulated exhaust manifold six in two; catalytic converter close to the engine
- Direct fuel injection with central injector position (solenoid valve injectors)
- Third generation Valvetronic
- Digital Motor Electronics (MEVD17.2 Bosch) engine mounted, integrated into the intake manifold, FlexRay-compatible
- Lightweight construction crankshaft
- Map-controlled oil pump (volume control)
- Standardized single-belt drive across all series
- Initial start-up in F07, afterwards use across all series.