BRAKE MOUNTING, APPARATUS AND METHOD FOR DETERMINING A MEASUREMENT VARIABLE FOR A BRAKE FORCE OR FRICTIONAL FORCE ACTING ON A DISK BRAKE

• US 20130233065A1
• Filed: 10/17/2011
• Published: 09/12/2013
• Est. Priority Date: 11/03/2010
• Status: Active Grant

• Current Assignee: Continental Teves AG & Co. OHG (Continental AG)
• Original Assignee: Continention TEVE AG & Company OHG
• Inventors: Heise, Andreas, Lohberg, Peter, Erler, Wolfgang, Zydek, Michael
• Granted Patent: US 9,157,820 B2
• Time in Patent Office: Days
• US Class Current: 73/130
• CPC Class Codes: F16D 2055/0008 Brake supports
• CPC Class Codes: F16D 2066/005 Force, torque, stress or strain
• CPC Class Codes: F16D 55/226 in which the common actuating member is moved axially , e.g. floating caliper disc brakes
• CPC Class Codes: F16D 66/00 Arrangements for monitoring working conditions, e.g. wear, temperature
• CPC Class Codes: G01L 5/28 for testing brakes

Abstract

A location-determining device in a motor vehicle having at least one receiver device for receiving position signals and time signals for a multiplicity of satellites assigned to a global navigation system and a location-calculating module for calculating location information based on received position data and time data. The location-determining device has at least one receiver device structurally integrated into the housing of an optical sensor unit, wherein the housing is arranged in a passenger compartment in a region of an upper edge of a windscreen, and wherein the housing does not have more than a single connection to a vehicle data bus and not more than a single connection to a vehicle power supply.

Claims

1. A brake mounting (1) for determining a measurement variable for an acting brake force (F_B) or frictional force on a disk brake (311, 312) of a motor vehicle of the type having a caliper acting on friction linings which frictionally engage a brake disc and which can be attached (A-B) to the motor vehicle (10), the brake mounting (1) comprising at least two lining guide rails (11a, 11b) disposed across the brake disk (8) and on which the friction linings (7, 9) on both sides of the brake disk (8) are guided so as to be movable to a limited extent in the axial z axis direction (z) of the brake disk (8), a sensor device (38, 39, 40, 41, 42, 43, 44), by means of which an x axis displacement (Δ

x) of at least one of the lining guide rails, caused by a brake force effect in a direction (x) perpendicular to the axial z axis direction (z) of the brake disk (8) is measured, the sensor device having a first sensor element (35, 135, 135′

) and a second (36, 136, 136′

) sensor element, whose relative movement is measured, the first sensor element (35, 135, 135′

) and the second sensor element (36, 136, 136′

) are disposed on the brake mounting (1).

2. The brake mounting (1) as claimed in claim 1, further comprising in that the sensor device (38, 39, 40, 41, 42, 43, 44) comprises a stiff, rod-shaped, sensor body (24, 26, 26′

), which is rigidly joined at one end thereof, to one of the lining guide rails (11b) or adjacent to one of the guide rails, and the first (35, 135, 135′

) or the second sensor element (36, 136, 136′

) is attached in an area of a free end of the sensor body (24, 26, 26′

).

3. The brake mounting (1) as claimed in claim 2, further comprising in that the sensor body (24, 26, 26′

) extends along the one of the lining guide rails (11b) above the brake disk (8).

4. The brake mounting (1) as claimed in claim 2 further comprising in that the sensor body (24, 26) is attached with the one end to the brake mounting (1) to one of the lining guide rails (11b), the first sensor element (35, 135, 135′

) is disposed at the free end of the sensor body (24, 26) and the second sensor element (36, 136, 136′

) is disposed in an area of the one of the lining guide rails (11b) facing away from the vehicle.

5. The brake mounting (1) as claimed in claim 2 further comprising in that the sensor body (26′

) is attached with the one end to an end of one of the lining guide rails (11b) facing away from the vehicle, the second sensor element (36, 136, 136′

) disposed at the free end of the sensor body (26′

) and the first sensor element (35, 135, 135′

) is disposed to on one of the lining guide rails (11b).

6. The brake mounting (1) as claimed in claim 2 further comprising in that the sensor device (38, 40, 41, 42, 43, 44), the sensor body (26, 26′

), is at least partly disposed in an inner bore (27) of one of the lining guide rails (11b).

7. The brake mounting (1) as claimed in claim 1 further comprising in that the first (35, 135, 135′

) and the second (36, 136, 136′

) sensor element interact according to a magnetic measurement principle.

8. An apparatus for determining a measurement variable for an acting brake force (F_B) or frictional force on a hydraulically operated, disk brake (311, 312) of a motor vehicle with a brake mounting (1) attached (A-B) to the motor vehicle (10) on which friction linings (7, 9) disposed on both sides of a brake disk (8) are guided in the axial z axis direction (z) of the brake disk (8) so as to be movable to a limited extent, wherein the friction linings (7, 9) can be pressed onto opposite lateral surfaces of the brake disk (8) during braking, and with a pair of lining guide rails of the brake caliper (2) disposed across the brake disk (8) and the friction linings (7, 9), which is supported on the brake mounting (1) so as to be displaceable, in the axial z axis direction of the brake disk (8), wherein the sensor device (38, 39, 40, 41, 42, 43, 44) is connected to a control unit (314), which carries out brake control using a measurement signal of the sensor device.

9. The apparatus as claimed in claim 8, further comprising in that the lining guide rails (11a, 11b) and the mounting (12, 13) are implemented in such a way that the brake mounting (1) during clamping or release of the disk brake has a characteristic (100, 200) between a brake control variable (E) and the x axis displacement (Δ

x, X), in a direction perpendicular to the axial direction which has a detectable change of its curve for at least one characteristic value of the x axis displacement (X₁₀, X₂₀), which can be used for a calibration or for friction lining wear correction of the measurement signal.

10. A method for determining a measurement variable for an acting brake force (F_B) or frictional force on a hydraulically operated disk brake (311, 312) of a motor vehicle with a brake mounting (1) attached (A-B) to the motor vehicle (10), with at least two lining guide rails (11a, 11b) disposed across a brake disk (8), on which friction linings (7, 9) disposed on both sides of the brake disk (8) are guided in the axial z axis direction (z) of the brake disk (8) so as to be displaceable to a limited extent, and with a housing of the brake caliper (2) disposed across the brake disk (8) and the friction linings (7, 9), comprising measuring an x axis displacement (Δ

x) of at least one part (11b) of the lining guide rail, caused by a brake force effect in an x axis direction (x) perpendicular to the axial direction (z) of the brake disk (8) using a sensor device (38, 39, 40, 41, 42, 43, 44) with a first (35, 135, 135′

) and a second (36, 136, 136′

) sensor element, which are both disposed on the brake mounting (1).

11. The method as claimed in claim 10, further comprising in that during operation of the disk brake with the motor vehicle (10) stationary determining an inclination angle or a downgrade force of the motor vehicle from the x axis displacement (Δ

x) or that an actual coefficient of friction is concluded from the x axis displacement (Δ

x) during slipping or sliding of a wheel associated with the disk brake.

12. The method as claimed in claim 10 further comprising in that a characteristic (100, 200) of the brake mounting (1) is specified or the characteristic (100, 200) of the brake mounting is determined during the operation of the disk brake, wherein the characteristic (100, 200) represents a relationship between a brake control variable (E, p, I, L_Pedal) and the x axis displacement (Δ

x, X) during clamping or release of the disk brake, and an evaluation of the characteristic (100, 200) is carried out to detect a characteristic value (X₁₀, X₂₀) of the characteristic at which a detectable change of the curve of the characteristic occurs, represented by an abrupt change of the gradient of the characteristic.

13. The method as claimed in claim 12 further comprising in that using the characteristic (100, 200) by the determination a correction of a measured value of the x axis displacement (Δ

x, X) in relation to friction lining wear is carried out, and that a corrected x axis displacement (Δ

x, X) is used for brake control of the disk brake.

14. The method as claimed in claim 12 further comprising in that an actual value of the characteristic (100, 200) of the brake mounting (1) is determined or evaluated with the aid of a characteristic value (X₁₀, X₂₀) of the characteristic at which a detectable change of the curve of the characteristic occurs, including an abrupt change of the gradient of the curve.

15. The method as claimed in claim 12 further comprising in that a the brake control variable (E, p, I, L_Pedal) determined from a measured value of the x axis displacement Pedal, is (Δ

x) using the specified or determined value of the characteristic of the brake mounting (1), and that electronic brake control of the disk brake (311, 312) is carried out using the brake control variable (E, p, I, L_Pedal).

16. The method as claimed in claim 10 further comprising in that electronic brake control of the disk brake (311, 312) is carried out directly using a determined value of the x axis displacement (Δ

x) without calculation or determination of a brake force (F_B) or a brake control variable.