US4841446A — Method for monitoring the operations of an electr…

Claim 1

Independent Claim 193 words

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.

Claim 2

Dependent Claim 193 words

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.

Claim 3

Dependent Claim 74 words

A safety switching arrangement according to claim 1 wherein: said first input means receives vehicle longitudinal acceleration signals from said reference circuit; said second input means receives sensor longitudinal acceleration input signals; and said evaluation means includes longitudinal acceleration comparing means for determining if the vehicle and sensor longitudinal acceleration signals match within a bandwidth and generating an error signal when they do not match within said bandwidth and a blocking signal is absent.

Claim 4

Dependent Claim 74 words

A safety switching arrangement according to claim 2 wherein: said first input means receives vehicle transverse acceleration signals from said reference circuit; said second input means receives sensor transverse acceleration input signals; and said evaluation means includes transverse acceleration comparing means for determining if the vehicle and sensor transverse acceleration signal match within a bandwidth and generating an error signal when they do not match within said bandwidth and a blocking signal is absent.

Claim 5

Dependent Claim 63 words

A safety switching arrangement according to claim 2 including a fourth input means for receiving vehicle speed signals from the reference circuit; and window comparator means for generating an enable signal which enables longitudinal acceleration comparator means to generate error signals only if the driving speed signals are in a window range between a lower and an upper barrier of the vehicle speed.

Claim 6

Dependent Claim 109 words

A safety switching arrangement according to claim 3 wherein: said first input means receives at least one wheel speed signal and includes a differentiator means for generating wheel acceleration signal from said wheel speed signal; said second input means receives sensor vertical acceleration input signals; and said evaluation means includes first and second filtering means for filtering said wheel acceleration signal and sensor vertical acceleration input signals respectively, first and second threshold value comparator means for comparing filtered signals from said first and second filtering means respectively, and logic means for generating an error signal when output signals of said first and second threshold value comparators occur substantially simultaneously.

Claim 7

Dependent Claim 117 words

A safety switching arrangement according to claim 2 wherein said longitudinal acceleration comparing means includes: first comparator means for comparing the vehicle longitudinal acceleration signals and the sensor longitudinal acceleration signals; second comparator means, having an attenuator means at one input, for comparing the vehicle longitudinal acceleration signals and attenuated sensor longitudinal acceleration signals attenuated by said attenuating means; a time delay means connected to the output of the first signal comparator means; and AND means having a first input for receiving the output of the time delay means and the output of the second signal comparator means, a second inverter input for receiving the control system control signal and an output for generating said error signal.

Claim 8

Dependent Claim 119 words

A safety switching arrangement according to claim 3 wherein said transverse acceleration comparing means includes: first signal comparator means for generating an output signal when the vehicle transverse acceleration signals are significantly higher than the sensor transverse acceleration signals; a delay time means connected to the output of first signal comparator means; second signal comparator means for generating an output signal when the vehicle transverse acceleration signals are smaller than the sensor transverse acceleration signals; and AND means having a first input for receiving the output of the delay time means and the output of the second signal comparator means, a second inverting input for receiving the control system control signal and an output for generating said error signal.

Claim 9

Dependent Claim 64 words

A safety switching arrangement according to claim 6 including: a fourth input means for receiving vehicle speed signals from the reference circuit; window comparator means for generating an enable signal only if the driving speed signals are in a window range between a lower and an upper barrier of the vehicle speed; and said AND means includes a third input receiving said enable signal.

Claim 10

Dependent Claim 72 words

A safety switching arrangement according to claim 5 wherein: said logic means includes first and second signal holding means connected to the output of said first and second threshold value comparator means respectively; and an AND-means having a first and second inputs for receiving output of said first and second signal holding means respectively, a third input for receiving said control system control signal and an output for generating said error signal.

Claim 11

Dependent Claim 96 words

A safety switching arrangement according to claim 5 wherein: said longitudinal and transverse acceleration comparing means each include signal comparator means for comparing and logic means for generating said error signal; including testing means for (a) generating test signals that simulate output signals of said signal comparator means and said threshold value comparator means and applying said test signals to a respective logic means for generation of said error signal; and (b) generating test status signal to prevent disabling of said control system and prevent activation of said warning indicator by said error signal during testing.

Claim 12

Dependent Claim 42 words

A safety switching arrangement according to claim 10, wherein said testing means generates testing signals in three successive testing cycles, in each respective testing cycle, test signals are applied only to one of the logic means for longitudinal, transverse and vertical acceleration.

Claim 13

Dependent Claim 33 words

A safety switching arrangement according to claim 10, including an additional display and means for activating said additional display when an error signal fails to occur when the test status signal is present.

Claim 14

Dependent Claim 78 words

A safety switching arrangement according to claim 10, including a fourth input means for receiving vehicle speed signals from the reference circuit; window comparator means for generating an enable signal which enables longitudinal acceleration comparator means to generate error signals only if the driving speed signals are in a window range between a lower and an upper barrier of the vehicle speed; and said testing means generates test signals that simulate the release signal of the window comparator.

Claim 15

Dependent Claim 73 words

A safety switching arrangement according to claim 6 including testing means for (a) generating test signals that simulate output signals of said comparator means and applying said test signals to said time delay means and first input of said AND means for generation of said error signals; and (b) generating test status signal to prevent disabling of said control system and prevent activation of said warning indicator by said error signal during testing.

Claim 16

Dependent Claim 73 words

A safety switching arrangement according to claim 7 including testing means for (a) generating test signals that simulate output signals of said comparator means and applying said test signals to said time delay means and first input of said AND means for generation of said error signals; and (b) generating test status signal to prevent disabling of said control system and prevent activation of said warning indicator by said error signal during testing.

Claim 17

Dependent Claim 109 words

A safety switching arrangement according to claim 2 wherein: said first input means receives at least one wheel speed signal and includes a differentiator means for generating wheel acceleration signal from said wheel speed signal; said second input means receives sensor vertical acceleration input signals; and said evaluation means includes first and second filtering means for filtering said wheel acceleration signal and sensor vertical acceleration input signals respectively, first and second threshold value comparator means for comparing filtered signals from said first and second filtering means respectively, and logic means for generating an error signal when output signals of said first and second threshold value comparators occur substantially simultaneously.

Claim 18

Dependent Claim 64 words

A safety switching arrangement according to claim 16 including: a fourth input means for receiving vehicle speed signals from the reference circuit; window comparator means for generating an enable signal only if the driving speed signals are in a window range between a lower and an upper barrier of the vehicle speed; and said AND means includes a third input receiving said enable signal.

Claim 19

Dependent Claim 71 words

A safety switching arrangement according to claim 7 including: a fourth input means for receiving vehicle speed signals from the reference circuit; window comparator means for generating an enable signal only if the driving speed signals are in a window range between a lower and an upper barrier of the vehicle speed; and said evaluation means includes an input for receiving said enable signal which enables generation of an error signal.

Claim 20

Independent Claim 140 words

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: 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.

Claim 21

Independent Claim 140 words

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: 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.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1992-06-19	1992-12-19	1993-06-20	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1996-06-19	1996-12-19	1997-06-20	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2000-06-19	2000-12-19	2001-06-20	$7700.00	Window Closed / Lapsed

Method for monitoring the operations of an electromechanical control system that ensures the adhesion of wheels of a motor vehicle

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