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US 4,211,193 AGranted
Speed regulating systems
AssigneeAssociated Engineering Limited
InventorsMichael D. Cox, Norman Hunt, Kenneth W. Colver
Life of this patent
Estimating the term…
Abstract
A system for limiting the engine-driven speed of a vehicle (e.g. a truck) includes an override circuit to enable engine power to be produced when the vehicle exceeds the pre-set speed, provided that the vehicle is decelerating rapidly, such as occurs when the vehicle has coasted down a steep incline and is then running uphill. The system may include an interlock to prevent the override action until the engine power has first been reduced to a predetermined minimum.
Claims5
A speed regulating system for regulating the speed of an engine-driven vehicle, comprising
- engine power control means for controlling the power of the engine of the vehicle,
- means responsive to the actual vehicle speed to produce an input signal representing actual vehicle speed,
- means producing a speed reference signal representing a pre-set value of vehicle speed,
- speed regulating means connected to respond to the two said signals and to produce an output signal when the actual vehicle speed exceeds the pre-set value,
- means feeding the output signal to the engine power control means whereby to tend to prevent the vehicle from being driven by the engine at a speed in excess of the pre-set value,
- override control means connected to receive the input and speed reference signals and to detect therefrom when the vehicle is decelerating at at least a predetermined rate and that, simultaneously, the vehicle speed exceeds the pre-set value, and to produce an override signal in response to such detection, and
- means feeding the override signal to the engine power control means to override the effect thereon of the speed regulating means and to cause the engine power control means to tend to increase the engine power.
4 more elements
Dependencies are inferred from the claim text.