Abstract: A vehicle speed control system includes a first generator for producing an operation signal upon closure of a set switch at a desired vehicle speed and receipt of a timing signal from a second generator responsive to the actual vehicle speed, the operation signal disappearing in response to one of the subsequent timing signals. A first calculator calculates a first time difference between predetermined and instant time periods respectively defined by the desired and actual vehicle speeds, and a second calculator calculates a second time difference between the respective instant time periods. A third generator produces a correction signal defined by the second time difference during generation of the operation signal and produces another correction signal defined by the sum or a difference of the time differences in relation to identical or opposite signs of the time differences after disappearance of the operation signal.

Abstract: In a speed control system for vehicles, a speed-difference calculation circuit calculates an absolute value of a time difference between a predetermined period of time corresponding with a desired speed and the actual period of time corresponding with the actual speed, an acceleration calculation circuit calculates an absolute value of a time difference between the preceding and following actual periods of time within a limited range, and correction signal generator calculates a sum of the absolute values when each sign of the calculated time differences is positive or negative and calculates a difference between the absolute values when respective signs of the calculated time differences are opposite to each other. The signal generator selectively produces correction signals related to the calculated sum and the calculated difference.

Abstract: A device for the control of the traveling speed of a motor vehicle with an electrical controller which compares the prevailing actual speed with a desired nominal speed and contains a regulating unit electromotorically controlled by the control deviation, which regulating unit is coupled directly or indirectly with an element, particularly the throttle valve, which influences the fuel-air mixture supplied to the vehicle motor. A coupling is between the element and the movable part of the regulating unit, which coupling is operatively connected directly or indirectly with the brake pedal and/or the clutch pedal of the vehicle in such a manner that during the actuation of the brake pedal or the clutch pedal the coupling is acted upon so as to separate the regulating unit from the element.

Abstract: A speed regulator or governor for an engine. The governor utilizes the approximate digital equivalent of a lead and a lag feedback network in combination with a stored, digital, nonlinear look-up table, or other nonlinear means, to control engine speed. The governor controls the engine at different fixed engine speeds in response to demand, or at continuously variable engine speeds in response to demand.

Abstract: A device for the control of the traveling speed of a motor vehicle with a regulating member actuatable by the vehicle driver and giving off an electrical signal, the regulating member being connected with the desired-value input of an electrical controller, the output signal of which acts on an adjustment actuator. The latter is coupled with the element which influences the fuel-air mixture, particularly the throttle valve, and the instantaneous position of the adjustment actuator is transmitted as an electric signal to the actual-value input of the controller. A correction circuit is connected with the actual-value input or the desired-value input of the controller. For the correction of the throttle-valve displacement which is dependent on the regulating member, this circuit produces a signal which is a function of one or more operating parameters which are related to the fuel consumption.

Abstract: An electric regulating device, particularly for a speed control device for motor vehicles, with a servomotor and a rotatably mounted element which actuates the regulating member, the rotatable element particularly being a cable pulley which stands in operative connection with the servomotor via a gearing and a coupling device containing an electromagnet. At least one of the gears of the gearing is radially and at an angle indirectly or moveably mounted, and is connected indirectly or directly with an armature, which in turn cooperates with the electromagnet. The gearing includes a gearwheel operatively coordinated to the at least one gear. A spring biases the armature with a spring force for moving the one gear out of engagement with the gearwheel when the electromagnet is without current. The spring cooperates with means for reducing the pretension of the spring in the neutral position of the regulating device.

Abstract: An automatic speed control for a vehicle having a source of compressed air, such as a heavy duty truck, includes a logic controller which controls a pair of solenoid valves to regulate communication between the compressed air source and an air actuated throttle. The controller is responsive to initiation of speed control by actuation of the appropriate switch by the vehicle operator to use inputs representing wheel speed (or engine speed) and the position of the vehicle throttle to generate an error signal. The controller compares the error signal with a signal representing a desired or memorized speed set by the vehicle operator and controls the air actuated throttle accordingly.

Abstract: Signals representing actual and desired speeds of a vehicle are separately applied to a plurality of parallel comparator channels or devices. Each comparator device responds to a different level of difference between the speed signals, when actual is greater than desired, to produce output signals at successively higher levels. The first comparator device controls a first deceleration device, e.g., an exhaust throttle, to reduce vehicle speed when an output signal is produced at the first preselected level of difference. The second and third comparator devices control the second and third deceleration devices, respectively, e.g., an eddy-current brake, automatic transmission, etc., when each produces an output signal at its preselected difference level, but only if the next lower comparator output has enabled a gate or switch coupling the higher level comparator and deceleration devices.

Abstract: An electrical regulating device, particularly for a speed control device for motor vehicles, with a servomotor, a rotatably mounted setting element which actuates the position or adjustment actuator, the setting element being in operative connection with the servomotor via an electro-magnetic coupling, and a monitoring stage for the mechanical functioning of the coupling. The monitoring stage contains a unit for recognizing the restoring speed of the setting element or the adjustment actuator, a unit for comparison of the actual resetting speed with a pregiven reference value and a unit for production of a signal upon an unsafe deviation of the actual resetting speed from the reference value.

Abstract: Device for controlling of the traveling speed of a motor vehicle with an electrical controller, which controller, by an electrical adjusting device in dependency on a desired value which is fed-in or stored by the driver via one or more manually actuatable first actuating elements, acts on an element which influences the ratio of the fuel-air mixture fed to the motor vehicle, particularly the throttle valve, and its adjusting device is switchable inoperatively off by second actuating elements. Elements are provided by which the controller can be turned off if at least one first actuating element and at least one second actuating element are in their active position or condition.

Abstract: An electronic governor control for an automotive engine that prevents the speed of the engine from exceeding a predetermined limit. The electronic circuitry responds to ignition pulses and limits the throttle opening of the vehicle to maintain the predetermined speed limit. The electronic governor control also includes circuitry to prevent engine overshoot of the predetermined limit by monitoring the rate of acceleration and adjusting the predetermined limit to anticipate and initiate governor control prior to the engine reaching the predetermined speed limit. Circuitry is also included which allows the governor control to retain control of the engine until the accelerator control reduces the speed of the engine to a speed value below the predetermined limit.

Abstract: In a speed control system for an automotive vehicle, a speed-differential calculation circuit calculates an absolute value of a time difference between a predetermined period of time corresponding with a desired speed and an instant period of time corresponding with an actual vehicle speed, an acceleration calculation circuit calculates an absolute value of a time difference between the respective instant periods of time, a correction signal generator calculates a sum of the absolute values when each sign of the calculated time differences is positive or negative and calculates a difference between the absolute values when respective signs of the calculated time differences are opposite to each other, the correction signal generator selectively producing correction signals respectively representing the calculated sum and the calculated difference and ceasing the correction signals when each of the calculated values is zero, and a distribution circuit produces a control signal therefrom in response to the resp

Abstract: A motor vehicle speed regulating device having a desired speed setting device, an actual speed detecting device, and an acceleration controlling device which operates to regulate the rate of acceleration upon changes made in the adjustment of the set speed device, wherein a delay device is connected in a feedback between a speed correcting device and the acceleration control device.

Abstract: A digital drive current for application to a variable-speed electric motor is generated from a binary signal including N high-order bits and n low-order bits. A pulse waveform of fixed frequency higher than the frequency to which the motor can respond is generated to have a pulse width duty cycle in accordance with the value of the high-order bits. The low-order bits are used to make a one-step increase in the width of a proportion, determined by the value of the low-order bits, of the pulses of the pulse waveform, so that the average pulse width is increased a desired fraction of one step.

Abstract: A high mobility wheeled vehicle for transporting long loads, such as trimmed tree trunks or whole trees, over roadless terrain. The vehicle has front and rear quad wheel assemblies pivotally connected to a centrally disposed elongated bed frame so as to permit lateral rotation of these assemblies about a roll axis disposed below and parallel to the longitudinal axis of the bed frame. A linkage type roll control interconnects the quad wheel assemblies and the bed frame to proportionately control the relative angular movement of the bed frame with respect to the quad wheel assemblies. The roll control includes a plurality of interconnected links plus a pair of power extensible links for selectively adjusting the steady state position of the vehicle bed relative to the quad wheel assemblies in either direction.

Abstract: This invention relates to a method of and apparatus for controlling the operation of a vehicle by means of electrical signals generated in a manner dependent on the road speed of the vehicle wherein the method comprises setting up a specific magnetic field in association with a normally unmagnetized component of the vehicle which rotates at a speed proportional to the road speed of the vehicle and sensing variations in the magnetic field in a coil located on the opposite side of a ferromagnetic member of the vehicle to the component and amplifying the signal through a high gain amplifier.

Abstract: The invention relates to an actuator device for a motor vehicle speed-responsive system, the device being operable to actuate the throttle valve or the like of the internal combustion engine of the vehicle. The actuator device comprises a bellows device defining a first chamber partly bounded by a movable wall and a fixed wall, and communicating with two further chambers defined by associated housings carried by the said fixed wall. One of the further chambers contains a first electro-magnetic control valve fed by a D.C. voltage, and operable to control an orifice through which the first chamber communicates with atmosphere. The other of the further chambers contains a second electro-magnetic control valve fed both by said D.C. voltage and by a pulsed voltage, and operable to control both an orifice through which the first chamber communicates with atmosphere and an orifice through which the first chamber communicates with a source of gas at sub-atmospheric pressure.

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.

Abstract: A desired automobile speed signal memory circuit for an automobile speed control system to maintain actual automobile speed constant at a desired speed. The memory circuit memorizes an actual automobile speed signal at the moment a desired speed set switch is closed. This memorized automobile speed signal is then used as a reference signal by the automobile speed control system to keep the actual automobile speed constant. The memory circuit has a capacitor which memorizes the desired speed signal, a first FET which forms a memorization loop with the capacitor upon the closure of the desired speed set switch, and a second FET which supplies the memorized desired speed signal on the capacitor in an impedance conversion mode as the reference signal used by the automobile speed control system to maintain constant the speed of the automobile.

Abstract: A system for controlling the speed of a motor vehicle has a speed detector which produces a first electrical signal having a mean level relating to the actual speed of the vehicle and an alternating component whose amplitude is also related to the actual speed of the vehicle. A memory is provided for storing a second electrical signal which has a mean level related to the required vehicle speed and which is substantially free of any alternating component. A comparator compares the first and second electrical signals and therefore produces an error signal which has a mean level corresponding to the difference (if any) between the actual and required vehicle speed and an alternating component related to the actual vehicle speed. A servo responds to the amplitude of the error signal to adjust the actual speed of the vehicle towards the required value.

Abstract: An automobile speed control for maintaining actual road speed at a preselected driving speed. To control throttle position so as to maintain the actual road speed at the preselected speed, a first error signal is obtained from a comparator. The first error signal is, for the purpose of stabilizing the actual road speed, compared with a negative feedback signal to generate the final throttle position control signal. The negative feedback signal is obtained from an intake air flow rate detector to prevent increasing the force required for operating the throttle valve control mechanism and to facilitate installation of the speed control system.

Abstract: An acceleration warning system for motor driven vehicles. The system includes speed measuring apparatus providing an output to a differentiating circuit for determining the rate of change of vehicle acceleration, and means responsive to a predetermined output of the differentiating circuit for indicating when the acceleration of the vehicle is beyond a predetermined rate. The system may also include control means for automatically limiting the acceleration of the vehicle.

Abstract: A device for regulating the traveling speed of a motor vehicle, compares a signal proportional to the actual speed of the vehicle with a signal proportional to the set or desired speed, and superposes on one or both of the signals a periodic signal having at least one periodically recurring section of non-linear characteristic, to obtain a control signal whose amplitude is modulated as a function of the magnitude of deviation between the actual speed signal and the set speed signal, and the control signal is transmitted to a control stage influencing the fuel-air mixture supplied to the engine of the vehicle.

Abstract: A device for automatically controlling a speed restriction from information coming from outside the vehicle, comprising means for analysing and decoding the information and control means for maintaining the speed of the vehicle at a value equal to that of the speed limit. The device comprises coding means for coding the information coming from outside; program means able to make correspond to each speed limit a voltage associated with this speed and electrical connection means between the program means and the speed control means, these electrical connection means being responsive to the coding of the speed limit and able to select the voltage corresponding to the coded speed.

Abstract: A speed regulating device for motor vehicles, wherein a setting element is arranged to affect the fuel/air mixture supplied to the engine of the vehicle in response to a control signal, and including an electrical regulator and a variable resistor associated with the setting element and the electrical regulator for signalling to the electrical regulator the actual position of the setting element, the feedback means including a lost motion connection whereby a predetermined movement of the setting element is required before an indication of change or reversal of movement of the setting element is communicated to the electrical regulator, thereby eliminating hunting of the speed regulating device caused by looseness or play in mechanical linkage between the setting drive and throttle valve.

Abstract: A multi-axle traction vehicle is equipped with apparatus for sensing the speeds of its respective drive axles, and control apparatus is provided for producing a predetermined warning signal if the sensed speed of one and only one of the axles is less than a predetermined low threshold level. In addition, apparatus is provided for inhibiting the control apparatus unless all but one of the sensed axle speeds are greater than a predetermined higher threshold level thereby minimizing the opportunity of producing a false warning signal.