1 / 39

NEW DEVELOPMENTSIN AGRICULTURAL EQUIPMENT TRACTORS

NEW DEVELOPMENTSIN AGRICULTURAL EQUIPMENT TRACTORS. R. T. Schuler National AgrAbility Project University of Wisconsin - Madison. November 14 , 2006. Tractors. Guidance and Auto-Steer Global Positioning System Guidance Auto-Steer Autonomous Transmissions Number of gears/speeds

kirby-galloway
Download Presentation

NEW DEVELOPMENTSIN AGRICULTURAL EQUIPMENT TRACTORS

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. NEW DEVELOPMENTSIN AGRICULTURAL EQUIPMENT TRACTORS R. T. Schuler National AgrAbility Project University of Wisconsin - Madison November 14 , 2006

  2. Tractors • Guidance and Auto-Steer • Global Positioning System • Guidance • Auto-Steer • Autonomous • Transmissions • Number of gears/speeds • CVT - Continuously Variable Transmission • IVT - Infinitely Variable Transmission • Suspension • Tractor Chassis • Cab • Seat

  3. Global Position Systems Basic GPS Satellite System Only (3 of 24) Low cost – automobiles Error – 100 feet Satellite Constellation

  4. Global Position Systems Basic GPS Satellite System Only (3 of 24) Low cost – automobiles Error – 100 feet Satellites plus free beacon Intermediate cost Error – 2 to 3 feet

  5. Global Position Systems Basic GPS Satellite System Only (3 of 24) Low cost – automobiles Error – 100 feet Satellites plus free beacon Intermediate cost Error – 2 to 3 feet Satellites plus geostationary satellite More costly Error – 3 to 5 inches

  6. Global Position Systems Basic GPS Satellite System Only (3 of 24) Low cost – automobiles Error – 100 feet Satellites plus free beacon Intermediate cost Error – 2 to 3 feet Satellites plus geostationary satellite More costly Error – 3 to 5 inches Satellites plus base station nearby Costly ($18,000 in 2006) One inch or less

  7. Guidance and Automatic Steering Adoption • Most systems use GPS • Payback Improve productivity Increased forward speed Reduced crop inputs Reduced operator fatigue Ability to operate longer hours (darkness) • Simple installation – 30 minutes • Lower cost in recent years

  8. Line A – B is base line called Track 0 Guidance provided between points A and B

  9. Example of a Light BarLocated in front of operator All lights on in test mode Green light – acceptable area Yellow light - caution area Red light - unacceptable

  10. Light Bar Middle green light is on- Driving right on target

  11. Light Bar Right most green light is on: Driving to right of center but acceptable (error increment can be adjusted)

  12. Light Bar First yellow light is on: Caution – corrective steering should be taken

  13. Light Bar Red light is on: Operator needs to make steering correction

  14. Another Display System Green rectangle represents front end of tractor and angle of line indicates error (magnitude of error also displayed) Track Error No Error

  15. Another Display System Audio alarm when error occurs Green rectangle represents front end of tractor and angle of line indicates error (magnitude of error also displayed) Track Error Track 2 ft. Small Error No Error

  16. Another Display System Audio alarm when error occurs Green rectangle represents front end of tractor and angle of line indicates error (magnitude of error also displayed) Track Error Track 2 ft. Track 5ft Small Error Large Error No Error

  17. New Special Feature

  18. New Special Feature Automatic turn around on headland New Features – automatic headland turn around

  19. Option with GPS • Guidance e.g. lightbar

  20. Option with GPS • Guidance • Autosteer • Steering wheel control

  21. Option with GPS • Guidance • Autosteer • Steering wheel control • Steering control system valve

  22. Machine Vision – Non-GPS

  23. Transmissions for Mobile Equipment • Gear • Speed changes in steps • Single power transmission path • Efficiency at part loads dependent on the number of gears • Hydrodynamic • Automotive transmission • Infinitely variable • Not adaptable to high torque • Hydrostatic • Infinitely variable • Inefficient • Infinitely/continuously variable • Power split in the transmission • Electronic control of transmission and engine for most efficient operation

  24. Background-Gear Transmissions • Early Tractors had one or two forward speeds, one reverse • More forward speeds were added • Speed change without clutching-torque amplifier • Synchronized transmission • Shifting on the go • Infinitely/continuously variable transmission

  25. Tractor Engine and Driveline for Two Wheel Drive Single path for the flow of power through transmission Transmission Engine Axles Clutch Differential

  26. Infinitely/Continuously Variable Transmission Power is directed into two paths Planetary gear systems facilitates this Power from the two paths are merged

  27. Basic CVT/IVT Transmission Sun Fixed path Planetary Gear Set (power split) Carrier Output Variable Path Ring Input 2 gears

  28. Basic CVT/IVT Transmission Carrier Fixed path Sun Planetary Gear Set (power merge) Output Variable Path Input Ring 2 gears

  29. IVT/CVT Characteristics • Hand control for forward, reverse, speed changes and stopping • Smooth, seamless shifting • Unlimited speeds from 0.03 to 26 mph (Deere) • Improved fuel economy at reduced load • Reduced load-maintain forward speed with changing engine speed • Need for feet only to start the tractor engine • Cost – $9780 (right side), $10,490 (left side)

  30. Suspension System Goals • Improve operator comfort and reduce long term health issues • Reduce vibration from traveling over rough terrain • Reduce vibration due engine and drive train vibration • Improve tractor performance • Reduce the potential for power hop on FWD and FWA • Improve contact between wheels and soil surface

  31. Background on seat suspension • First tractor operators had to stand • Seats rigidly attached to tractor chassis • Spring supported seats-passive • Spring plus shock absorbers -passive • Air suspensions seats-passive • Active suspension seats

  32. John Deere Active Seat- $3641 Source: Dufner and Shick, Deere

  33. John Deere Active Seat Source: Dufner and Shick, Deere

  34. John Deere Active Seat Source: Dufner and Shick, Deere

  35. John Deere Active Seat Source: Dufner and Shick, Deere

  36. Tractor chassis suspension • More beneficial for the higher speeds • Front axle suspension – Deere • Front and rear axle suspension - Fastrac

  37. Tractor chasis suspension • More beneficial for the higher speeds • Front axle suspension – Deere • Front and rear axle suspension - Fastrac • Reduces potential for power hop • Improved performance with FWA tractor

  38. Concluding remarks • Guidance and auto-steer • IVT/CVT • Fuel saving • Automatic shift up-throttle back • Suspension Systems • Seat • Cab • Chassis

  39. QUESTIONS

More Related