Tractor-Implement Systems - Alcock, Ralph

. .

Sommaire:
1 Fundamental Considerations.- 1.1 Introduction.- 1.2 Systems.- 1.3 Energy and Principles of Dynamics.- 1.4 The Conservation of Energy.- References.- 2 Thermodynamics.- 2.1 The Steady-Flow Energy Equation.- 2.2 The Nonflow Energy Equation.- 2.3 The First Law of Thermodynamics.- 2.4 The Second Law of Thermodynamics.- 2.5 The Thermodynamic Engine.- 2.6 Gas Laws.- 2.7 Specific Heat.- 2.8 Gas Processes.- 2.9 The Carnot Cycle.- References.- 3 Power Measurement.- 3.1 Power.- 3.2 Torque.- 3.3 Indicated Power (IP).- 3.4 Energy Balance.- 3.5 Measurement of Fuel Flow.- 3.6 Measurement of Air Flow.- 3.7 Tractor Performance.- 3.8 Drawbar Pull (FD).- 3.9 Nebraska Tractor Tests.- References.- 4 Traction.- 4.1 Traction in Soils.- 4.2 Shear Strength.- 4.3 Plastic Limit.- 4.4 Coulomb and Micklethwaite Equations.- 4.5 Bekker Theory.- 4.6 Dimensional Analysis.- 4.7 Tractive Efficiency (?D).- 4.8 Mobility Number.- References.- 5 Tires and Ballasting for Agricultural Tractors.- 5.1 Tire Development.- 5.2 Tire Function.- 5.3 Tire Terminology.- 5.4 Ballasting.- 5.5 Tire Selection.- References.- 6 Machinery Management.- 6.1 Fixed Costs.- 6.2 Operating Costs.- 6.3 Reliability.- 6.4 Selection of Machinery Capacity.- 6.5 Replacement Theory.- References.- 7 Vehicle Performance.- 7.1 Drawbar Performance.- 7.2 Engine Torque Requirement.- 7.3 Vehicle Speed.- 7.4 Vehicle Acceleration.- 7.5 Longitudinal Stability.- 7.6 Tractor Dynamics.- 7.7 Tractor-Implement Forces.- 7.8 Tractor-Implement Dynamics.- References.- 8 Connecting Tractor and Implement (Sverker Persson).- 8.1 Pull-Type, Semimounted, or Mounted Implement.- 8.2 Hitch Point.- 8.3 Load Transfer Due to Pull.- 8.4 Effect of Load Transfer.- 8.5 Free-Link Three-Point Hitches.- 8.6 Powered Three-Point Hitch.- 8.7 Motions of Fully Mounted Implement in Three-Point Hitch.- 8.8 Lifting Capacity of the Hydraulic System.- 8.9 Draft-Sensing Hydraulic Systems.- 8.10 Position Control.- 8.11 Hydraulic Systems.- 8.12 Open- or Closed-Center Hydraulics.- 9 Operating the Tractor and the Implement (Sverker Persson).- 9.1 The Tractor as a Workplace.- 9.2 Tractor Controls and Instruments.- 9.3 Operator Environment.- 9.4 Operator Safety.- 9.5 Systems for Hitching the Implement to the Tractor.- References.- 10 Developments in the Tractor Concepts.- 10.1 Introduction.- 10.2 Controlled-Traffic Farming.- 10.3 Battery-Powered Tractor.- 10.4 Systems Tractor.- References.- Appendix: Problems and Problem-Solving.