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An engine output control method for a vehicle having a throttleless internal combustion engine system responsive to a desired engine speed signal. The method includes generating a driver demanded engine speed value corresponding to an operator input and generating a speed control system engine speed

An engine output control method for a vehicle having a throttleless internal combustion engine system responsive to a desired engine speed signal. The method includes generating a driver demanded engine speed value corresponding to an operator input and generating a speed control system engine speed value corresponding to a predetermined speed value to permit vehicle operation at a constant speed by a speed control system. The method arbitrates between the driver demanded engine speed value and the speed control system engine speed value to derive a first desired engine speed value. This value is limited by a vehicle speed limit value, engine speed limit value, and transmission speed limit value to generate a second desired engine speed value. The engine is then controlled as a function of the second desired engine speed value and an actual engine speed value. Engine control is accomplished by way of variable valve timing, fueling rate and/or fuel flow, and spark advance.

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An engine output control method for a vehicle having a throttleless internal combustion engine system responsive to a desired engine speed signal. The method includes generating a driver demanded engine speed value corresponding to an operator input and generating a speed control system engine speed

An engine output control method for a vehicle having a throttleless internal combustion engine system responsive to a desired engine speed signal. The method includes generating a driver demanded engine speed value corresponding to an operator input and generating a speed control system engine speed value corresponding to a predetermined speed value to permit vehicle operation at a constant speed by a speed control system. The method arbitrates between the driver demanded engine speed value and the speed control system engine speed value to derive a first desired engine speed value. This value is limited by a vehicle speed limit value, engine speed limit value, and transmission speed limit value to generate a second desired engine speed value. The engine is then controlled as a function of the second desired engine speed value and an actual engine speed value. Engine control is accomplished by way of variable valve timing, fueling rate and/or fuel flow, and spark advance. second discs coupled to the frame and arranged behind the first discs along the direction of travel, each of the second discs having a ground-engaging outer periphery, the outer peripheries of the second discs defining respective second planes angled acutely relative to the direction of travel, the second planes being angled to an opposite side of the direction of travel than the first planes, a ground-engaging driver rotatably coupled to the frame for rotating as the driver engages and is moved across the ground along the direction of travel, and a driven flow controller rotatably coupled to the frame for rotating at a rotational speed and situated between the plurality of first discs and the plurality of second discs, the driven flow controller having sweeping members rotatable in a forward direction, the ground-engaging driver operatively engaged with the driven flow controller for controlling the rotational speed of the driven flow controller. 2. The farm implement of claim 1, wherein: the ground-engaging outer peripheries of the first discs each comprise notches extending substantially radially inward relative to the first discs and spaced circumferentially relative to each other; and the ground-engaging peripheries of the second discs each comprise notches extending substantially radially inward relative to the second discs and spaced circumferentially relative to each other. 3. The farm implement of claim 1, wherein the first discs are arranged in a first row substantially perpendicular to the direction of travel and the second discs are arranged in a second row substantially perpendicular to the direction of travel. 4. The farm implement of claim 1, wherein the first planes and the second planes are offset relative to the direction of travel by 10 degrees to 20 degrees. 5. The farm implement of claim 1, wherein the first planes and second planes are offset relative to the direction of travel by 15 degrees. 6. The farm implement of claim 1, wherein the first planes and second planes are tilted back to offset the first and second planes from vertical by an angle of 2 degrees to 10 degrees. 7. The farm implement of claim 1, wherein the first planes and second planes are tilted back to offset the first and second planes from vertical by an angle of 6 degrees. 8. The farm implement of claim 1, wherein each of the first discs and each of the second discs have a respective concave face exposed to the direction of travel. 9. The farm implement of claim 1, wherein the ground-engaging driver is supported ahead of the plurality of first discs relative to the direction of travel. 10. The farm implement of claim 1, wherein the ground-engaging driver comprises a shaft and a plurality of sets of elongated members extending from the shaft, the shaft having an axial length and a peripheral surface, the plurality of sets of elongated members being spaced at respective axial locations along the axial length, each of the sets of elongated members comprising a plurality of the elongated members spaced apart circumferentially about the peripheral surface of the shaft. 11. The farm implement of claim 10, wherein the elongated members comprise elongated twisted teeth. 12. The farm implement of claim 10, wherein each of the elongated members is tilted forward from a respective radial position relative to the shaft. 13. The farm implement of claim 1, wherein: the ground-engaging driver is supported ahead of the plurality of first discs relative to the direction of travel; the ground-engaging driver comprises a shaft and a plurality of sets of elongated twisted teeth extending from the shaft, the shaft having an axial length and a peripheral surface, the plurality of sets of elongated twisted teeth being spaced at respective axial locations along the axial length, each of the sets of elongated twisted teeth comprising a plurality of the elongated twisted teeth spaced apart circumferentially about the peripheral surface of the sha ft; and the elongated twisted teeth have respective ends distal to the shaft for rotating along respective paths, the paths each extending into a space between a corresponding set of adjacent ones of the first discs. 14. The farm implement of claim 1, wherein the driven flow controller comprises a shaft and a plurality of sets of the sweeping members extending from the shaft, the shaft having an axial length and a peripheral surface, the plurality of sets of sweeping members being spaced at respective axial locations along the axial length, each of the sets of sweeping members comprising a plurality of the sweeping members spaced apart circumferentially about the peripheral surface of the shaft. 15. The farm implement of claim 14, wherein the sweeping members comprise elongated paddles. 16. The farm implement of claim 15, wherein the elongated paddles have respective ends distal to the shaft for rotating along respective paths, the paths each extending into a first space between a corresponding set of adjacent ones of the first discs and a second space between a corresponding set of adjacent ones of the second discs. 17. The farm implement of claim 1, wherein the farm implement further comprises an accelerator unit for rotating the driven flow controller at a ratio of about 3:1 to about 3.5:1 relative to the ground-engaging driver. 18. The farm implement of claim 1, further comprising a coulter assembly coupled to the frame, the coulter assembly comprising a rotatable coulter shaft situated behind the plurality of second discs along the direction of travel, the coulter shaft having an axis substantially perpendicular to the direction of travel, the coulter assembly further comprising a plurality of coulter blades spaced axially relative to each other along the axis of the coulter shaft, each of the coulter blades having a ground-engaging outer periphery, the outer peripheries of the coulter blades defining respective third planes parallel to the direction of travel. 19. The farm implement of claim 1, wherein the coulter assembly further comprises a coulter assembly load-adjusting actuator for controlling the load that the ground-engaging outer peripheries of the coulter blades apply to the ground. 20. The farm implement of claim 19, wherein the coulter assembly further comprises a pivotal coulter link connecting to the frame for suspending the coulter assembly from the frame. 21. The farm implement of claim 1, further comprising a reel assembly coupled to the frame, the reel assembly comprising a rotatable reel shaft and a plurality of elongated blades, the reel shaft having a periphery and being situated behind the plurality of second discs along the direction of travel, the elongated blades being spaced circumferentially about the periphery of the reel shaft along a helical pattern and having a ground-engaging edge for chopping debris and breaking soil clods. 22. The farm implement of claim 21, wherein the reel assembly further comprises a reel assembly load-adjusting actuator for controlling the load that the ground-engaging edges of the elongated blades apply to the ground. 23. The farm implement of claim 21, wherein the reel assembly further comprises a pivotal reel link connecting to the frame for suspending the reel assembly from the frame. 24. The farm implement of claim 1, further comprising a plurality of rows of at least one member selected from the group consisting of chisel shanks and tines supported by the frame, the rows disposed behind the plurality of second discs along the direction of travel, each of at least one member having an edge portion distal to the frame for engaging the ground. 25. The farm implement of claim 24, wherein each of the rows has a respective plurality of said at least one member arranged in staggered relationship relative to said at least one members of adjacent rows. 26. The farm implement of claim 24, wherein said at least one member is detachable from and reattachable to the frame