VEHICLE OVERSPEED PROTECTION SYSTEM
First Claim
Patent Images
1. A work vehicle including:
- an engine including a throttle device;
a transmission coupled to the engine;
a chassis including a cab portion, a trailer portion, and a coupling device positioned between the cab portion and the trailer portion, the cab portion including a first frame and the trailer portion including a second frame, the coupling device being configured to provide pivoting movement of the trailer portion relative to the cab portion;
a front wheel assembly configured to support the cab portion, the front wheel assembly including a first axle and a pair of wheels coupled to the first axle;
a rear wheel assembly configured to support the trailer portion, the rear wheel assembly including a second axle and a pair of wheels coupled to the second axle;
a drive shaft coupled between the first wheel assembly and the second wheel assembly;
a brake coupled to at least one of the front and rear wheel assemblies and configured to apply a braking force to the at least one of the front and rear wheel assemblies;
a sensor configured to detect a speed of the vehicle; and
a controller in communication with the brake and the sensor, the controller being configured to control an opening of the throttle device of the engine, the controller being configured to automatically reduce the opening of the throttle device upon the detected vehicle speed being outside a first threshold range and to automatically actuate the brake upon the detected vehicle speed being outside a second threshold range, the second threshold range being greater than the first threshold range.
1 Assignment
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Accused Products
Abstract
An articulated vehicle is provided having a cab portion, a trailer portion, and a coupling assembly positioned between the cab portion and the trailer portion. A front wheel assembly may support the cab portion, and a rear wheel assembly may support the trailer portion. The vehicle may include an overspeed protection system configured to protect the vehicle from an overspeed condition.
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Citations
30 Claims
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1. A work vehicle including:
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an engine including a throttle device; a transmission coupled to the engine; a chassis including a cab portion, a trailer portion, and a coupling device positioned between the cab portion and the trailer portion, the cab portion including a first frame and the trailer portion including a second frame, the coupling device being configured to provide pivoting movement of the trailer portion relative to the cab portion; a front wheel assembly configured to support the cab portion, the front wheel assembly including a first axle and a pair of wheels coupled to the first axle; a rear wheel assembly configured to support the trailer portion, the rear wheel assembly including a second axle and a pair of wheels coupled to the second axle; a drive shaft coupled between the first wheel assembly and the second wheel assembly; a brake coupled to at least one of the front and rear wheel assemblies and configured to apply a braking force to the at least one of the front and rear wheel assemblies; a sensor configured to detect a speed of the vehicle; and a controller in communication with the brake and the sensor, the controller being configured to control an opening of the throttle device of the engine, the controller being configured to automatically reduce the opening of the throttle device upon the detected vehicle speed being outside a first threshold range and to automatically actuate the brake upon the detected vehicle speed being outside a second threshold range, the second threshold range being greater than the first threshold range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A vehicle including:
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a front portion including a front frame, an engine supported by the front frame, and a transmission coupled to the engine; at least one of a retarder coupled to the transmission and a parasitic load coupled to the engine, activation of the at least one of the retarder and the parasitic load being configured to inhibit a rotation of the transmission; a front wheel assembly operably coupled to the front frame to support the front portion, the front wheel assembly including a first axle and a pair of wheels coupled to the first axle; a trailer portion including a rear frame; a rear wheel assembly operably coupled to the rear frame to support the trailer portion, the rear wheel assembly including a second axle and a pair of wheels coupled to the second axle; a frame coupling positioned between the front frame and the rear frame, the frame coupling being configured to provide pivoting movement between the front frame and the rear frame; a drive shaft coupled between the front wheel assembly and the rear wheel assembly; a brake coupled to at least one of the front and rear wheel assemblies and configured to apply a braking force to the at least one of the front and rear wheel assemblies; a sensor configured to detect a speed of the transmission; and a controller in communication with the brake, the sensor, and the at least one of the retarder and the parasitic load, the controller being configured to automatically activate the at least one of the retarder and the parasitic load upon the detected transmission speed being outside a first threshold range and to automatically actuate the brake upon the detected transmission speed being outside a second threshold range, the second threshold range being greater than the first threshold range. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. An overspeed protection method for a vehicle, the method including:
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providing a vehicle including a cab portion, a trailer portion, a drive train, and a coupling device positioned between the front portion and the trailer portion, the coupling device being configured to provide pivoting movement between the trailer portion and the cab portion, the cab portion including a front wheel assembly and the trailer portion including a rear wheel assembly, at least one of the front wheel assembly and the rear wheel assembly including a brake, the drive train including an engine and a transmission coupled to the engine; detecting a speed of the drive train; comparing the detected speed to a first threshold range; reducing a throttle demand to the engine upon the detected speed being outside the first threshold range; comparing the detected speed to a second threshold range, the second threshold range being greater than the first threshold range; and activating the brake upon the detected speed being outside the second threshold range. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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Specification