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About this book

This textbook offers a comprehensive review of tractor design fundamentals. Discussing more than hundred problems and including about six hundred international references, it offers a unique resource to advanced undergraduate and graduate students, researchers and also practical engineers, managers, test engineers, consultants and even old-timer fans. Tractors are the most important pieces of agricultural mechanization, hence a key factor of feeding the world. In order to address the educational needs of both less and more developed countries, the author included fundamentals of simple but proved designs for tractors with moderate technical levels, along with extensive information concerning modern, premium tractors. The broad technical content has been structured according to five technology levels, addressing all components. Relevant ISO standards are considered in all chapters. The book covers historical highlights, tractor project management (including cost management), traction mechanics, tires (including inflation control), belt ground drives, and ride dynamics. Further topics are: chassis design, diesel engines (with emission limits and installation instructions), all important types of transmissions, topics in machine element design, and human factors (health, safety, comfort). Moreover, the content covers tractor-implement management systems, in particular ISOBUS automation and hydraulic systems. Cumulative damage fundamentals and tractor load spectra are described and implemented for dimensioning and design verification. Fundamentals of energy efficiency are discussed for single tractor components and solutions to reduce the tractor CO2 footprint are suggested.

Table of Contents

Frontmatter

1. Mission, History, Trends, Markets, and Costs

Abstract
The prosperity of a nation needs mechanization in general [1.1]. However, a first step should address agriculture [1.2].
Karl Theodor Renius

2. Tractor Mechanics

Abstracts
Off-road tractor speeds. Off-road working speeds have been increased from about 3 km/h (for horses) [2.1] to often between about 4 and 12 km/h for tractors; in the case of a very even surface for special operations (such as forage cutting) up to 15–20 km/h.
Karl Theodor Renius

Chapter 3. Chassis Design

Abstract
For global requirements, see Table 3.1. Tractor tires must be able to perform not only off-road but in many countries also on-road. International top speeds are often 28-32 km/h, which is about 20 mph.
Karl Theodor Renius

Chapter 4. Diesel engines

Abstract
The name “diesel engine” recognizes its inventor Rudolf Diesel (1858–1913).
Karl Theodor Renius

Chapter 5. Tractor transmissions

Abstract
Importance and general functions. The transmission with included rear axle, also called “transaxle”, Fig. 5.1, is the most important tractor component, representing about 25–30% of total tractor cost.
Karl Theodor Renius

Chapter 6. Tractor Workplace

Abstract
The scientific investigation of human machine relations is still a young discipline.
Karl Theodor Renius

Chapter 7. Tractor and Implement

Abstract
The standard tractor becomes productive in agriculture only in combination with implements or trailers. A very few special tractors offer platforms for transport.
Karl Theodor Renius

8. Tractor Tests

Abstract
Internal tractor test activities can be structured into A, B, C, and D, Table 8.1.
Karl Theodor Renius

Backmatter

Additional information

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