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US 4,061,212 AGranted
Rotational rate of change sensor
OwnerFolke Ivar Blomberginventor
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OwnerFolke Ivar Blomberginventor
Estimating the term…
A sensor responsive to the rate of change of changing rotational speeds of a rotatable element in which a flyweight is yieldably coupled with the rotatable element through an interconnecting element at any relative rotational position of the flyweight and interconnection for normal rotation thereof at a known ratio of rotational speed while accommodating decoupled rotation of the flyweight upon a change in rotational speed of the driving element at such a rate as to cause a torque in excess of a determinable threshold torque to act between the interconnection and the flyweight. During decoupled rotation, the flyweight is limited to deceleration at a controlled, substantially constant rate. Any occurrence of decoupled rotation of the flyweight is signalled as indicating that the rate of change of the changing rotational speed of the rotatable element exceeds a determinable rate. In the particular instance of an automotive vehicle wheel, the signalled occurrence indicates wheel slip and sensor signals may be used with an appropriate brake modulator for varying braking force.
In a braking system for a vehicle wheel and having anti-lock control means, and sensor means for actuating the anti-lock means including a flyweight coupled for rotation in response to wheel rotation and means operatively interconnecting the flyweight and the wheel for selectively decoupling the flyweight from the wheel upon a torque having a magnitude greater than a threshold magnitude being exerted therebetween as a result of a change in rotational speed of the wheel, the improvement in the interconnecting means comprising control means for limiting the rate of deceleration of the decoupled flyweight to a controlled, substantially constant rate.
In a braking system for a vehicle wheel and having anti-lock control means, and sensor means for actuating the anti-lock means including a flyweight coupled for rotation in response to wheel rotation and means operatively inerconnecting the flyweight and the wheel for selectively decoupling the flyweight from the wheel upon a torque having a magnitude greater than a threshold magnitude being exerted therebetween as a result of a change in rotational speed of the wheel, the improvement in the interconnecting means comprising control means for controlling wheel slip and for maintaining it within a predetermined range.
In a braking system for a vehicle wheel and having anti-lock control means, and sensor means for actuating the anti-lock means including a flyweight coupled for rotation in response to wheel rotation and means operatively interconnecting the flyweight and the wheel for selectively decoupling the flyweight from the wheel upon a torque having a magnitude greater than a threshold magnitude being exerted therebetween as a result of a change in rotational speed of the wheel, the improvement in the interconnecting means comprising control means for limiting the rate of deceleration of the decoupled flyweight to a predetermined rate.
In a braking system for a vehicle wheel and having anti-lock control means, and sensor means for actuating the anti-lock means including a flyweight coupled for rotation in response to wheel rotation and means operatively interconnecting the flyweight and the wheel for selectively decoupling the flyweight from the wheel upon a torque having a magnitude greater than a threshold magnitude being exerted therebetween as a result of a change in rotational speed of the wheel, the improvement in the interconnecting means comprising control means for applying substantially said same torque to said flyweight for limiting the rate of deceleration of the decoupled flyweight.
In a braking system for a vehicle wheel and having anti-lock control means, and sensor means for actuating the anti-lock means including a flyweight coupled for rotation in response to wheel rotation and means operatively interconnecting the flyweight and the wheel for selectively decoupling the flyweight from the wheel upon a torque having a magnitude greater than a threshold magnitude being exerted therebetween as a result of a change in rotational speed of the wheel, the improvement in the interconnecting means comprising control means in frictional engagement with a surface rotating with the flyweight for limiting the rate of deceleration of the decoupled flyweight substantially independently of any changes in coefficient of friction between said flyweight and said control means.
In a braking system for a vehicle wheel and having anti-lock control means, and sensor means for actuating the anti-lock means including a flyweight coupled for rotation in response to wheel rotation and means operatively interconnecting the flyweight and the wheel for responding to an excessive rate of change of wheel rotation speed by decoupling the flyweight from the wheel and by accommodating simultaneous change in rotation of the wheel at the excessive rate of change and change in rotation of the flyweight at a lesser rate of change, the interconnecting means responding to reversal in the rate of change of wheel rotation and to rotation of the flyweight and the wheel at a known ratio of rotational speeds by recoupling the flyweight and the wheel, the improvement in the interconnecting means comprising control means for exerting on said flyweight while the same is decoupled a controlled torque resisting relative rotation between said interconnecting means and said flyweight at any ratio of rotational speeds other than said known ratio whereby successive decoupling and recoupling permits the rate of change of wheel rotation to be controlled by the rate of change of flyweight rotation.
In a braking system for a vehicle wheel and having anti-lock control means, and sensor means for actuating the anti-lock means including a flyweight rotatable in response to wheel rotation and rotatable means operatively interconnecting the flyweight and the wheel for yieldably coupling the same;
In a braking system for a vehicle wheel and having anti-lock control means and sensor means for actuating the control means including a flyweight rotatable in response to wheel rotation, the improvement in the sensor comprising rotatably means operatively interconnecting the flyweight and the wheel for yieldably coupling the same;
In a braking system for a vehicle wheel and having anti-lock means, and sensor means for actuating said anti-lock means in response to the rate of change of changing rotational speeds of a vehicle wheel, the improvement wherein said sensor means comprises a flyweight rotatable in response to wheel rotation, and rotatable means operatively interconnecting said flyweight and the wheel for yieldably coupling the same;
In a braking system for a vehicle wheel and having anti-lock control means, and sensor means for actuating said anti-lock means in response to the rate of change of changing rotational speeds of a vehicle wheel, the improvement wherein said sensor means comprises a flyweight rotatable in response to wheel rotation and defining a right circular cylindrical surface, and rotatable means operatively interconnecting said flyweight and the wheel for yieldably coupling the same;
In a system for controlling rotation of a rotatable element and having control means, and sensor means for actuating the control means including a flyweight coupled for rotation in response to rotation of the rotatable element and means operatively interconnecting the flyweight and the rotatable element for responding to a predetermined rate of change of rotatable element rotation speed by decoupling the flyweight from the rotatable element and by accommodating simultaneous change in rotation of the rotatable element at the predetermined rate of change and change in rotation of the flyweight at a lesser rate of change, the interconnecting means responding to reversal in the rate of change of rotatable element rotation and to rotation of the flyweight and the rotatable element at a known ratio of rotational speeds by recoupling the flyweight and the rotatable element, the improvement in the interconnecting means comprising means for exerting on the flyweight while the same is decoupled a controlled torque resisting relative rotation between said interconnecting means and said flyweight at any ratio of rotational speeds other than said known ratio whereby successive decoupling and recoupling permits the rate of change of rotatable element rotation to be controlled by the rate of change of flyweight rotation.
In a system for controlling rotation of a rotatable element and having control means and sensor means for actuating the control means in response to the rate of change of changing rotational speeds of a vehicle wheel, the improvement wherein said sensor means comprises a flyweight rotatable in response to rotatable element rotation and means operatively interconnecting said flyweight and the rotatable element for yieldably coupling the same;
In a sensor for responding to the rate of change of changing rotational speeds of a vehicle wheel and including a flyweight coupleable for rotation in response to wheel rotation and selectively decoupleable in response to the exertion on the flyweight of a torque having a magnitude greater than a threshold magnitude due to a change in rotational speed of the wheel, the improvement comprising control means for limiting the rate of deceleration of the decoupled flyweight to a controlled, substantially constant rate.
In a sensor for responding to the rate of change of changing rotational speeds of a vehicle wheel and including a flyweight coupleable for rotation in response to wheel rotation and selectively decoupleable in response to the exertion on the flyweight of a torque having a magnitude greater than a threshold magnitude due to a change in rotational speed of the wheel, the improvement comprising means for exerting on the flyweight a predetermined torque resisting decoupled rotation of the flyweight.
In a sensor for responding to the rate of change of changing rotational speeds of a vehicle wheel and including a flyweight coupleable for rotation in response to wheel rotation and selectively decoupleable in response to the exertion on the flyweight of a torque having a magnitude greater than a threshold magnitude due to a change in rotational speed of the wheel, the improvement comprising means for exerting on the flyweight a substantially constant torque resisting decoupled rotation of the flyweight.
In a sensor for responding to the rate of change of changing rotational speeds of a vehicle wheel and including a flyweight coupleable for rotation in response to wheel rotation and selectively decoupleable in response to the exertion on the flyweight of a torque having a magnitude greater than a threshold magnitude due to a change in rotational speed of the wheel, the improvement comprising control means for limiting the rate of deceleration of the decoupled flyweight to a predetermined rate.
In a sensor for responding to the rate of change of changing rotational speeds of a vehicle wheel and including a flyweight coupleable for rotation in response to wheel rotation and selectively decoupleable in response to the exertion on the flyweight of a torque having a magnitude greater than a threshold magnitude due to a change in rotational speed of the wheel, the improvement comprising control means for applying substantially the same said torque to said flyweight for limiting the rate of deceleration of the decoupled flyweight.
In a sensor for responding to the rate of change of changing rotational speeds of a vehicle wheel and including a flyweight coupleable for rotation in response to wheel rotation and selectively decoupleable in response to the exertion on the flyweight of a torque having a magnitude greater than a threshold magnitude due to a change in rotational speed of the wheel, the improvement comprising control means in frictional engagement with a surface rotating with said flyweight for limiting the rate of deceleration of the decoupled flyweight substantially independently of any changes in coefficient of friction between said flyweight and said control means.
In a sensor for responding to the rate of change of changing rotational speeds of a vehicle wheel and including a flyweight coupleable for rotation in response to wheel rotation, and means operatively interconnected with the flyweight for responding to a predetermined rate of change of wheel rotation speed by decoupling the flyweight from the wheel and by accommodating simultaneous change in rotation of the wheel at the predetermined rate of change and change in rotation of the flyweight at a lesser rate of change, said interconnecting means responding to reversal in the rate of change of wheel rotation and to rotation of the flyweight and the wheel at a known ratio of rotational speeds by recoupling the flyweight and the wheel, the improvement wherein said interconnecting means comprises means for limiting the rate of change of change in rotation of the flyweight to a controlled, substantially constant rate whereby successive decoupling and recoupling permits the rate of change of wheel rotation to be controlled by the rate of change of flyweight rotation.
In a sensor for responding to the rate of change of changing rotational speeds of a vehicle wheel and including a flyweight coupleable for rotation in response to wheel rotation, and rotatable means operatively interconnected with the flyweight for yieldably coupling the same;
In a sensor for responding to the rate of change of changing rotational speeds of a vehicle wheel and including a flyweight coupleable for rotation in response to wheel rotation, the improvement comprising rotatable means operatively interconnected with the flyweight for yieldably coupling the same;
A sensor for responding to the rate of change of changing rotational speeds of a vehicle wheel and comprising a flyweight coupleable for rotation in response to wheel rotation, and rotatable means operatively interconnected with said flyweight for yieldably coupling the same;
A sensor for responding to the rate of change of changing rotational speeds of a vehicle wheel and comprising a flyweight coupleable or rotation in response to wheel rotation and defining a right circular cylindrical surface, and rotatable means operatively interconnected with said flyweight for yieldably coupling the same;
In a method of controlling braking of a vehicle wheel which includes driving a rotatable flyweight from the wheel and controllably varying braking force in response to a comparison of rates of change of rotation speeds of the wheel and the flyweight, the improvement comprising decoupling the wheel and the flyweight in response to occurrences of excessive rates of change of wheel rotation speed, accommodating simultaneous change of rotation of the wheel at the excessive rate of change and of the flyweight at a lesser rate of change while limiting the rate of deceleration of the flyweight to a controlled, substantially constant rate and while controllably varying braking force;
In a method of controlling rotation of a vehicle wheel which includes driving a rotatable flyweight from the wheel and controllably varying rotation of the wheel in response to a comparison of rates of change of rotation speeds of the wheel and the flyweight;
In a method of controlling rotation of a rotatable element which includes driving a rotatable flyweight from the rotatable element and controllably varying rotation of the rotatable element in response to a comparison of rates of change of rotation speeds of the rotatable element and the flyweight;
In a method of controlling braking of a vehicle wheel which includes driving a rotatable flyweight from the wheel through an interconnecting device and controllably varying braking force in response to a comparison of rates of change of rotation speeds of the wheel and the flyweight, the improvement comprising (a) normally coupling the flyweight and the interconnecting device for rotation at a known ratio of rotational speeds, (b) adjustably determining within narrow limits a threshold magnitude of torque effective for decoupling the flyweight and the interconnecting device upon exertion of torque therebetween, (c) decoupling the interconnecting device from the flyweight and accommodating decoupled rotation between the flyweight and the interconnecting device upon a torque having a magnitude greater than the threshold magnitude being exerted therebetween as a result of deceleration in rotational speed of the wheel, and (d) recoupling the interconnecting device with the flyweight upon the same again reaching the known ratio of rotational speeds as a result of acceleration in rotational speed of the wheel.
In a method of controlling rotation of a vehicle wheel which includes driving a rotatable flyweight from the wheel through an interconnecting device and controllably varying rotation of the wheel in response to a comparison of rates of change of rotation speeds of the wheel and the flyweight, the improvement comprising (a) normally coupling the flyweight and the interconnecting device for rotation at a known ratio of rotational speeds, (b) adjustably determining within narrow limits a threshold magnitude of torque effective for decoupling the flyweight and the interconnecting device upon exertion of torque therebetween, (c) decoupling the interconnecting device from the flyweight and accommodating decoupled rotation between the flyweight and the interconnecting device upon a torque having a magnitude greater than a threshold magnitude being exerted therebetween as a result of the rate of change of rotational speed of the wheel, and (d) recoupling the interconnecting device with the flyweight upon the same again reaching the known ratio of rotational speeds as a result of an opposite change in the rate of change of rotational speed of the wheel.
In a method of controlling rotation of a rotatable element which includes driving a rotatable flyweight from the rotatable element through an interconnecting device and controllably varying rotation of the rotatable element in response to a comparison of rates of change of rotational speeds of the rotatable element and the flyweight, the improvement comprising (a) normally couling the flyweight and the interconnecting device for rotation at a known ratio of rotational speeds, (b) adjustably determining within narrow limits a threshold magnitude of torque effective for decoupling the flyweight and the interconnecting device upon exertion of torque therebetween, (c) decoupling the interconnecting device from the flyweight and accommodating decoupled rotation between the flyweight and the interconnecting device upon a torque having a magnitude greater than a threshold magnitude being exerted therebetween as a result of the rate of change of rotational speed of the rotatable device, and (d) recoupling the interconnecting device with the flyweight upon the same again reaching the known ratio of rotational speeds as a result of an opposite change in the rate of change of rotational speed of the rotatable element.
In a method for sensing deceleration of a wheel comprising the steps of normally coupling a flyweight to the wheel through an interconnecting device, decoupling the flyweight from the interconnecting device when the rate of deceleration of the wheel exceeds a threshold value whereby the flyweight rotates at a different and higher speed than that of the interconnecting device, and recoupling the flyweight and the interconnecting device when the interconnecting device speeds back up and reaches the speed of the flyweight, the improvement comprising limiting the rate of deceleration of the flyweight to a controlled, substantially constant rate.
In a braking system for a vehicle wheel and having an anti-lock control and a sensor for actuating said anti-lock control in response to the rate of change of changing rotational speeds of a vehicle wheel, said sensor having a rotating shaft operatively connected with the wheel and a flyweight rotatable relative to said shaft, the improvement in the sensor comprising frictional means having coupling surfaces for normally interconnecting said shaft and said flyweight, initial setting means operatively connected with said frictional means for normally resisting relative rotation between said flyweight and said shaft, actuating means operable with said frictional means for separating said coupling surfaces and thereby for decoupling said flyweight and said shaft, said actuating means decoupling said flyweight when torques caused by changing rotational speeds of the wheel and acting on said flyweight exceed a predetermined threshold torque between said shaft and said flyweight, and restraining means operatively connected with said frictional means and cooperating with said actuating means for controlling said threshold torque within narrow limits, said aforementioned means cooperating for permitting said flyweight to rotate against said threshold torque while said rotationally caused torques exceed said threshold torque and for exerting said threshold torque on said rotating flyweight by a high frequency stick-slip action.
Dependencies are inferred from the claim text.