Method for monitoring the operations of an electromechanical control system that ensures the adhesion of wheels of a motor vehicle
First Claim
1. A safety switching arrangement for monitoring and controlling the operations of an electromechanical control system that ensures the adhesion of heels of a motor vehicle, such as an antilock system or an antislip control system by a control system control signal, that is equipped with wheel rotation speed signal generators and a reference circuit for the determination of the wheel speeds, vehicle speed and vehicle acceleration from wheel rotation speeds, said safety switching arrangement comprising:
- first input means for receiving first set of vehicle acceleration signals derived from wheel speeds and vehicle speed, in said reference circuit;
second input means for receiving second set of vehicle acceleration signals from acceleration sensors fixed at the vehicle;
evaluation means for comparing said first and second set of acceleration signals to determine whether they match within a band width and generating an error signal to disable said control system and activate a warning indicator when the acceleration signals do not match within said band width; and
third input means for receiving a control system control signal as a blocking signal and suppressing said evaluation means from generating an error signal in response to said blocking signal.
1 Assignment
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Accused Products
Abstract
The proper functioning of a control system (such as an ABS, ASR) that secures the adhesion of the wheels, by analyzing wheel rotating speed signals, is determined by comparing acceleration signals determined from the wheel rotating speed signals with accelerated signals measured by acceleration sensors on the vehicle. If they do not correspond within given limits during absence of control system control signal, the control system is disabled by an error signal and a warning indicator is activated.
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Citations
19 Claims
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1. A safety switching arrangement for monitoring and controlling the operations of an electromechanical control system that ensures the adhesion of heels of a motor vehicle, such as an antilock system or an antislip control system by a control system control signal, that is equipped with wheel rotation speed signal generators and a reference circuit for the determination of the wheel speeds, vehicle speed and vehicle acceleration from wheel rotation speeds, said safety switching arrangement comprising:
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first input means for receiving first set of vehicle acceleration signals derived from wheel speeds and vehicle speed, in said reference circuit; second input means for receiving second set of vehicle acceleration signals from acceleration sensors fixed at the vehicle; evaluation means for comparing said first and second set of acceleration signals to determine whether they match within a band width and generating an error signal to disable said control system and activate a warning indicator when the acceleration signals do not match within said band width; and third input means for receiving a control system control signal as a blocking signal and suppressing said evaluation means from generating an error signal in response to said blocking signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for monitoring and controlling the operations of an electromechanical control system that ensures the adhesion of wheels of a motor vehicle, such as an antilock system or an antislip control system by a control system control signal, that is equipped with wheel rotation speed signal generators and a reference circuit for the determination of the wheel speeds, vehicle speed and vehicle acceleration from wheel rotation speeds, comprising the steps of:
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generating vehicle acceleration signals by acceleration sensors fixed at the vehicle; comparing vehicle acceleration signals from said reference circuit and from said acceleration sensors to determine whether they match within said band width; and generating an error signal to disable said control system and activate a warning indicator when the acceleration signals do not match within said band width during the absence of a control system control signal.
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Specification