Working vehicle
First Claim
1. A working vehicle including an engine and a working machine mounted on the vehicle, comprising:
- a vehicle speed sensor for detecting a travel speed of said working vehicle;
travel mode changeover means having a position that sets any one of a plurality of travel modes with different predetermined maximum speed limits and that prevents an operator from changing the travel mode; and
control means for controlling said working vehicle in such a manner that the travel speed of said working vehicle detected by said vehicle speed sensor is reduced after said speed exceeds a predetermined speed limit of the travel mode set by said travel mode changeover means.
1 Assignment
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Accused Products
Abstract
A working vehicle is provided for improving safety and work efficiency by changing a travel speed limit appropriately depending on forms and conditions of work. The working vehicle is driven with an engine, and a working machine such as a working pump is mounted on the vehicle. Fuel supplied to the engine is regulated by an injector. Travel speeds of the working vehicle are detected with a vehicle speed sensor. A control unit is provided with a high speed travel mode which limits vehicle speed at or below a predetermined high speed limit and a low speed travel mode which limits vehicle speed at or below a low speed limit which is set below the high speed limit. In this way, either the high speed travel mode or the low speed travel mode is set according to a changeover signal from a travel mode changeover switch.
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Citations
15 Claims
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1. A working vehicle including an engine and a working machine mounted on the vehicle, comprising:
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a vehicle speed sensor for detecting a travel speed of said working vehicle;
travel mode changeover means having a position that sets any one of a plurality of travel modes with different predetermined maximum speed limits and that prevents an operator from changing the travel mode; and
control means for controlling said working vehicle in such a manner that the travel speed of said working vehicle detected by said vehicle speed sensor is reduced after said speed exceeds a predetermined speed limit of the travel mode set by said travel mode changeover means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
warning means for warning an operator that the travel speed is approaching a predetermined speed limit when entering a predetermined range below a predetermined speed limit of each travel mode.
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4. The working vehicle of claim 1, further comprising:
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fuel regulating means for regulating fuel to be supplied to said engine, wherein supplying the fuel is stopped by said fuel regulating means when the travel speed exceeds a predetermined speed limit.
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5. The vehicle of claim 1, wherein said travel mode switch is adapted to be operated by a vehicle supervisor.
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6. The vehicle of claim 5, wherein said travel mode switch comprises a key switch.
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7. The vehicle of claim 1, further comprising a warning indicator that generates a warning indication in response to said speed signal approaching a speed corresponding to a predetermined speed limit of said current travel mode.
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8. The vehicle of claim 7, wherein said warning indicator generates said warning indication when said vehicle speed enters a predetermined range below said predetermined speed limit of said current travel mode.
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9. The vehicle of claim 1, wherein said controlling means comprises a fuel regulating means.
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10. The vehicle of claim 9, wherein said fuel regulating means stops a fuel supply to said vehicle in response to said speed signal indicating a speed of said vehicle exceeding a predetermined speed limit of said current travel mode.
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11. The vehicle of claim 10, wherein said fuel regulating means resumes said fuel supply in response to said speed signal indicating a speed of said vehicle being lower than a predetermined speed limit of said current travel mode.
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12. The vehicle of claim 1, wherein said travel modes permit operation of the working vehicle at any speed less than a corresponding predetermined maximum speed limit.
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13. A working vehicle comprising:
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a vehicle speed sensor that generates a speed signal which indicates a speed of said vehicle;
a travel mode switch having a position that sets one of a plurality of travel modes which each have a predetermined maximum speed limit to determine a current travel mode and that prevents an operator from changing the travel mode; and
a controller in communication with said vehicle speed sensor and said travel mode switch that reduces the speed of said vehicle in response to said speed signal indicating a speed of said vehicle exceeding a predetermined speed limit of said current travel mode. - View Dependent Claims (14)
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15. A working vehicle including an engine and a working machine mounted on the vehicle comprising:
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a vehicle speed sensor for detecting a travel speed of said working vehicle;
travel mode changeover means for manually setting any one of a plurality of travel modes with different predetermined speed limits; and
control means for controlling said working vehicle in such a manner that the travel speed of the working vehicle detected by the vehicle speed sensor is reduced after said speed exceeds a predetermined speed limit of the travel mode set by said travel mode changeover means, wherein the travel mode is selected as a function of one of a user'"'"'s experience, a user'"'"'s age, a user'"'"'s skill level, a weight of said working vehicle, and the weather.
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Specification