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US 6,704,637 B1Granted
Speed control for a work vehicle
AssigneeCase Corporation
InventorsOliver Hrazdera, Helmut Kubin, Hans Hochauer
Life of this patent
Estimating the term…
Abstract
There is disclosed herein a method and apparatus for changing the real speed of a work vehicle with a continuously variable transmission and an electronic control device having a cruise control function.
Claims12
A system for changing the real speed of a work vehicle with a continuously variable transmission and an electronic control device having a cruise control function, comprising the following actuating elements:
- a) an actuating element for changing the real speed of the vehicle, said real speed being continuously memorized as a first real speed and being maintained by the cruise control function if no re-adjustment takes place;
- and
- b) a first switch for disenabling and re-enabling the cruise control function, wherein the set first real speed is kept memorized on disabling and is set again on re-enabling, further comprising a second switch which, upon actuation, adjusts a second real speed, especially of zero, corresponding to a standstill of the vehicle, and by means of said actuating element said second real speed is adjustable for a maneuvering travel, said second real speed increasing up to a predetermined maximum value as long as said actuating element remains activated, and by actuating said second switch again, the cruise control function for said first real speed is re-enabled.
A method for changing the real speed of a work vehicle with a continuously variable transmission and an electronic control device with cruise control function, comprising the steps of:
- a) adjusting a first real speed of the vehicle by means of a first actuating element, continuously memorized within said control device and maintained by said cruise control function as long as no re-adjustment is performed such that said first real speed which was finally adjusted, is kept memorized;
- b) disenabling said cruise control function for said first real speed by actuating a switch, whereupon a second real speed is commanded, wherein, said second real speed is a predetermined speed, especially of zero, corresponding to a standstill of the vehicle, in that by means of said first actuating element a second real speed is adjusted for maneuvering travel, said second real speed increasing up to a predetermined maximum value as long as said first actuating element remains activated, and in that for returning from said second real speed to said first real speed memorized in said cruise control function, again a said switch is actuated.
Dependencies are inferred from the claim text.