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El. knyga: Transmissions and Drivetrain Design

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The aim of this work, consisting of 9 individual, self-contained booklets, is to describe commercial vehicle technology in a way that is clear, concise and illustrative. Compact and easy to understand, it provides an overview of the technology that goes into modern commercial vehicles.







Starting from the customer's fundamental requirements, the characteristics and systems that define the design of the vehicles are presented knowledgeably in a series of articles, each of which can be read and studied on their own. This volume, Transmissions and Drivetrain Design, begins with an explanation of how driving resistance and the engine characteristics factor into the configuration of the transmission and transmission ratios. The transmission and its associated assemblies are presented in detail, providing a clear understanding for training and practical applications. Other components of the drivetrain such as the propeller shaft, the clutch and the retarder are also discussed. 
1 Transmissions and Drivetrain Design
1(10)
1.1 Design of the Drivetrain
2(7)
1.1.1 Driving Resistance
2(2)
1.1.2 Transmission and Final Drive are Torque--and Rotational Speed Converters
4(1)
1.1.3 The Real Engine and the Transmission Ratio
4(4)
1.1.4 Traction Limit
8(1)
1.1.5 Drivetrain Design for Braking
8(1)
1.2 Drivetrain Design for Electric Trucks
9(2)
2 Transmission
11(26)
2.1 Main Transmission
13(8)
2.1.1 Internal Gearshift System
14(3)
2.1.2 Reverse Gear
17(1)
2.1.3 The Wheel Diagram
17(1)
2.1.4 Design Concept of the Spur Gear System
17(2)
2.1.5 The Gear Ratio
19(1)
2.1.6 Losses in the Transmission
20(1)
2.2 The Split Group
21(1)
2.3 Planetary Transmission or Epicyclic Gear System
22(2)
2.4 The Range Group
24(1)
2.5 Range-Splitter Gearbox
25(4)
2.6 External Gearshift System
29(3)
2.6.1 Automated Manual Transmissions
29(3)
2.7 Automatic Transmission
32(1)
2.8 Power Take-Offs
32(1)
2.9 The Transfer Case
33(4)
3 The Clutch
37(6)
3.1 The Friction Clutch
37(2)
3.2 Hydrodynamic Clutches and Converters
39(4)
3.2.1 Clutch Concepts for Heavy Goods Transportation
41(2)
4 Propeller Shaft(s)
43(2)
5 Retarders
45(4)
5.1 Secondary and Primary Retarder
45(1)
5.2 Hydrodynamic Retarders
46(1)
5.2.1 Coolant Retarders
47(1)
5.3 Inductive Retarders
47(2)
5.3.1 Retarders with Permanent Magnets
47(1)
5.3.2 Retarders with Electromagnets
48(1)
Comprehension Questions 49(2)
Abbreviation and Symbols 51(2)
References 53(2)
Index 55
The Author











Dr. Michael Hilgers is currently director of the testing center at BFDA and Director for entire vehicle testing for the Mercedes-Benz Business Unit at BFDA. BFDA is a joint venture in China between Daimler Truck and Foton. Before that he headed development departments for CAE and for vehicle Mechatronics in Commercial Vehicle Development at Mercedes-Benz Trucks.