Wheel slippage monitor
First Claim
1. A monitor for determining wheel slip for a wheeled vehicle having an engine and at least one driving wheel and being driven by the engine over the ground comprising means providing an electrical signal related to the speed of said engine, means providing an electrical signal related to the ground speed of said vehicle, means connected with both of said signal providing means and including dual ramp integrator means for comparing said signals and providing an electrical output according thereto, and perceptual means connected to and operated by said electrical output.
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Accused Products
Abstract
In plowing or towing of other vehicles or implements with a tractor it generally is desirable to move as fast as is economically feasible. Attempting too high a speed may be self-defeating through wheel slippage of the pulling tractor which may reduce efficiency to an uneconomic level. In accordance with the present invention an electronic signal is provided corresponding to the speed of the driving wheels of a tractor, and another electronic signal is provided corresponding to the ground speed of the tractor. These signals are compared electronically, and a visual readout is provided for the operator of the tractor so that he may know if he is operating within acceptable conditions of efficiency. Both audio and visual warning signals are provided to the tractor driver if slippage exceeds a predetermined maximum, corresponding to a predetermined minimum allowable efficiency.
32 Citations
17 Claims
- 1. A monitor for determining wheel slip for a wheeled vehicle having an engine and at least one driving wheel and being driven by the engine over the ground comprising means providing an electrical signal related to the speed of said engine, means providing an electrical signal related to the ground speed of said vehicle, means connected with both of said signal providing means and including dual ramp integrator means for comparing said signals and providing an electrical output according thereto, and perceptual means connected to and operated by said electrical output.
- 15. A monitor for determining drive slippage for a vehicle having an engine and being driven by the engine over the ground and having means providing an electrical signal related to the speed of the engine and means for providing an electrical signal related to ground speed of the vehicle comprising means connected with both of said signal providing means and including dual ramp integrator means for comparing said signals and providing an electrical output according thereto, said dual ramp integrator means comprising a dual ramp generator, switching means for alternately connecting and disconnecting said dual ramp generator with said first and second mentioned signal providing means, and means including a zero crossing detector connected with said dual ramp generator and shift register means connected with the switching means for actuating the switching means.
Specification