Measuring and testing – Brake testing – Brake depressor with measuring means
Patent
1991-08-14
1992-12-08
Myracle, Jerry W.
Measuring and testing
Brake testing
Brake depressor with measuring means
G01M 1900
Patent
active
051687500
ABSTRACT:
Apparatus for testing the brake system of a motor vehicle has a housing which can be coupled to the rails for the driver's seat and supports a drive for a reciprocable depressing unit for the brake pedal. The depressing unit has a rear section which is movable by the drive and a front section which is movable with and relative to the rear section. When a cap at the front end of the front section engages and depresses the pedal, the cap is first moved against the opposition of a weak coil spring relative to a rear portion of the front section to thus close a switch in the circuit of two potentiometers, and the front section is thereupon moved relative to the rear section against the opposition of a helical compression coil spring. One of the potentiometers measures the distance which is covered by the rear section and the other potentiometer measures the distance which is covered by the front section relative to the rear section of the depressing unit. Signals from the potentiometers are transmitted to an electronic evaluating circuit which ascertains the force which is needed for depression of the pedal on the basis of signals from the other potentiometer and by taking into consideration the characteristic of the compression coil spring. The circuit further ascertains the difference between the signals from the potentiometers to thus determine the extent of depression of the brake pedal.
REFERENCES:
patent: 3295368 (1967-01-01), Nevius
patent: 3662593 (1972-05-01), Pirrello
patent: 4186595 (1980-02-01), Domitter
patent: 4307604 (1981-12-01), Domitter
patent: 4771387 (1988-09-01), Hexel et al.
Ekuma Werkzeug-und Maschinenbau GmbH
Kontler Peter K.
Myracle Jerry W.
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