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BMW B46B20O1 User Manual

BMW B46B20O1
41 pages
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Technical Training
The information contained in this manual is not to be resold, bartered, copied or transferred
without the express written consent of BMW of North America, LLC ("BMW NA").
Copyright © 2018 BMW of North America, LLC
B46TU/B48TU
ENGINES
Reference Manual
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BMW B46B20O1 Specifications

General IconGeneral
Engine TypeInline 4-cylinder
Displacement1998 cc
Fuel TypePetrol
AspirationTurbocharged
Fuel SystemDirect injection
Compression Ratio11.0:1
ValvetrainDOHC
Bore x Stroke82 mm x 94.6 mm
Power Output135 kW (184 PS) @ 5000-6500 rpm
TurbochargerTwin-scroll turbocharger

Summary

1. Introduction

1.1. Innovations B46TU

Details technical improvements and new features for the B46TU engine for emissions compliance.

1.2. Innovations B48TU

Highlights technical improvements for the B48TU engine, including power, torque, and component changes.

1.4. Technical Data

Provides key technical specifications for the B46B2001 and B48B20T1 engines.

2. Engine Mechanical

3. Cooling System

3.1. Split Cooling

Introduces the split cooling concept as a new development for the B46TU engine.

3.2. Heat Management Module

Explains the heat management module, its function, and components like the rotary valve.

3.3. Operating Strategy

Shows the operating strategy of the rotary valve based on coolant temperature changes.

3.3.1. Cold-Start Phase

Describes the coolant circulation during the engine's cold-start phase.

3.3.2. Warm-Up Phase

Explains the coolant flow during the engine's warm-up phase, detailing the heat management module's role.

5. Fuel System

6. Engine Electrical System

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