BMW N55 Engine Training Manual PDF Download
BMW N55 Engine: A Masterpiece of Engineering
The BMW N55 engine is a remarkable piece of automotive engineering, renowned for its exceptional power, efficiency, and responsiveness. Introduced in 2009, this 3.0-liter inline-six engine has powered a wide range of BMW models, including the 1 Series, 3 Series, 4 Series, and X3. Its innovative design and advanced technologies have made it a benchmark for performance and fuel economy in its class.
The N55 engine is characterized by its advanced twin-turbocharger system, which provides exceptional power and torque throughout the rev range. The turbochargers are equipped with variable turbine geometry (VTG), which optimizes boost pressure and reduces turbo lag. This results in an exhilarating driving experience with instant throttle response and effortless acceleration.
In addition to its impressive power delivery, the N55 engine is also highly efficient. It features a direct fuel injection system that delivers fuel directly into the combustion chambers, maximizing efficiency and reducing emissions. The engine also incorporates a number of technologies to reduce friction and improve thermal management, resulting in lower fuel consumption and reduced CO2 emissions.
The N55 engine is also known for its exceptional smoothness and refinement. The inline-six configuration and advanced balance shaft system effectively minimize vibrations, providing a quiet and comfortable cabin experience. The engine is also equipped with a Valvetronic system, which continuously adjusts the valve lift and timing to optimize engine performance and reduce emissions.
Beyond its technical prowess, the N55 engine is also aesthetically pleasing. The engine block and cylinder head are made from lightweight aluminum alloy, giving the engine a sophisticated and modern appearance. The engine is also adorned with a BMW "twin-power" badge,彰显其卓越的性能和工程实力。
Training Manual: A Comprehensive Guide to N55 Engine Maintenance and Repair
The BMW N55 Engine Training Manual PDF Download is a comprehensive resource for anyone who wants to learn more about the N55 engine, its operation, maintenance, and repair. This manual provides detailed technical information, step-by-step instructions, and troubleshooting tips for all aspects of N55 engine ownership.
The manual covers a wide range of topics, including:
* Engine specifications and design
* Component identification and location
* Maintenance procedures
* Troubleshooting and repair
* Electrical systems
* Fuel and ignition systems
* Engine management systems
* Emissions control systems
The manual is written by experienced BMW technicians and engineers, ensuring that the information is accurate and up-to-date. It is illustrated with clear diagrams, schematics, and photographs to enhance understanding.
Whether you are a professional mechanic, an enthusiastic DIYer, or simply someone who wants to learn more about the N55 engine, the BMW N55 Engine Training Manual PDF Download is an invaluable resource. It provides the knowledge and guidance you need to maintain, repair, and understand this exceptional engine.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Components/Systems Overview . . . .
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . .
Full Load Diagram . . . . . . . . . . . . . . . . . . . . .
Current Models . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Designation and Engine Identification
Engine Designation . . . . . . . . . . . . . . . . . . .
Breakdown of N55 Engine Designation . .
Engine Identification . . . . . . . . . . . . . . . . . .
Engine Components . . . . . . . . . . . . . . . . . . . . .
Engine Housing . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Block . . . . . . . . . . . . . . . . . . . . . . . . .
Crankcase and Bedplate . . . . . . . . . . . . . . .
Crankshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft Main Bearings . . . . . . . . . . .
Pistons and Rings . . . . . . . . . . . . . . . . . . . . . . .
Connecting Rod and Bearings . . . . . . . . . . . .
Oil Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrionic Volume-controlled Oil Pump . . . .
Oil Pump and Pressure Control . . . . . . . . .
Oil Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Filtration and Oil Cooling . . . . . . . . . . . .
Oil Spray Nozzles . . . . . . . . . . . . . . . . . . . . .
Oil Pressure . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Return . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head Cover . . . . . . . . . . . . . . . . . .
Crankcase Ventilation . . . . . . . . . . . . . . . . . . . .
Naturally Aspirated Mode . . . . . . . . . . . . . .
Boost Mode . . . . . . . . . . . . . . . . . . . . . . . . . .
Valvetrain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intake and Exhaust Valves . . . . . . . . . . . . . .
Valve Springs . . . . . . . . . . . . . . . . . . . . . . . . .
Camshafts . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Timing . . . . . . . . . . . . . . . . . . . . . . . .
VANOS System . . . . . . . . . . . . . . . . . . . . . . . .
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VANOS Solenoid Valves . . . . . . . . . . . . . .
Cam Sensor Wheels . . . . . . . . . . . . . . . . .
Valvetronic III . . . . . . . . . . . . . . . . . . . . . . . . . . .
Phasing . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Masking . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combustion Chamber Geometry . . . . . .
Valve Lift Adjustment Overview . . . . . . . .
Valvetronic Servomotor . . . . . . . . . . . .
Function . . . . . . . . . . . . . . . . . . . . . . . . . .
Belt Drive and Auxiliarly Components . . . . .
Vibration Damper . . . . . . . . . . . . . . . . . . . . . . .
Air Intake and Exhaust System . . . . . . . . . . .
Air Intake System . . . . . . . . . . . . . . . . . . . .
Intake Manifold . . . . . . . . . . . . . . . . . . . . . .
Fuel Tank Ventilation System . . . . . . . . . .
Exhaust Manifold . . . . . . . . . . . . . . . . . . . .
Turbocharger . . . . . . . . . . . . . . . . . . . . . . . .
Function of the twin scroll turbocharg
Diverter valve . . . . . . . . . . . . . . . . . . . . .
Catalytic Converter . . . . . . . . . . . . . . . . . . .
Exhaust System . . . . . . . . . . . . . . . . . . . . .
Vacuum System . . . . . . . . . . . . . . . . . . . . . . . .
Vacuum Pump . . . . . . . . . . . . . . . . . . . . . . .
Fuel Injection . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Pressure Sensor . . . . . . . . . . . . . . . .
High Pressure Fuel Pump . . . . . . . . . . . . .
Fuel Injectors . . . . . . . . . . . . . . . . . . . . . . . .
Cooling System . . . . . . . . . . . . . . . . . . . . . . . .
Components . . . . . . . . . . . . . . . . . . . . . . . .
N55, Cooling System Components . . . .
Oil Cooler . . . . . . . . . . . . . . . . . . . . . . . .
Coolant Passages . . . . . . . . . . . . . . . . . . . .
Engine Electrical System . . . . . . . . . . . . . . .
Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Cooling Circuit Diagram . . . . . . . .
Digital Motor Electronics (DME/ECM) . . . . .
Digital Motor Electronics Circuit Diagram
N55, MEVD17.2 Circuit Diagram . . . . . .
Functions . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel supply system . . . . . . . . . . . . . . . . . . .
Fuel quantity control . . . . . . . . . . . . . . . . . .
Boost pressure control . . . . . . . . . . . . . . . .
Engine cooling . . . . . . . . . . . . . . . . . . . . . . .
System Protection . . . . . . . . . . . . . . . . . . . .
Crankshaft Sensor . . . . . . . . . . . . . . . . . . . . . . .
Ignition Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Pressure Sensor . . . . . . . . . . . . . . . . . . . . . .
Oxygen Sensors . . . . . . . . . . . . . . . . . . . . . . . . .
Oxygen sensor before catalytic converter
Oxygen sensor after catalytic converter . .
Hot-film air mass meter . . . . . . . . . . . . . . . .
High Pressure Fuel Injector Valve . . . . . . . . . .
Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Information . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head Cover . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
