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Calibration method for an electro-hydraulic motor vehicle braking system and associated calibration device

A braking system and motor vehicle technology, applied in the direction of foot-operated starting devices, braking transmission devices, braking action starting devices, etc.

Active Publication Date: 2016-11-16
LUCAS AUTOMOTIVE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since the actuation of the electric motor is required to maintain a sufficient gap width, sensor systems provided for the first actuator (eg for actuation purposes or inspection purposes) must also meet extremely high precision requirements

Method used

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  • Calibration method for an electro-hydraulic motor vehicle braking system and associated calibration device
  • Calibration method for an electro-hydraulic motor vehicle braking system and associated calibration device
  • Calibration method for an electro-hydraulic motor vehicle braking system and associated calibration device

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Experimental program
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Effect test

Embodiment Construction

[0040] Figure 1A A first exemplary embodiment of a motor vehicle hydraulic braking system 100 to be calibrated and based on the BBW principle is shown. The braking system 100 can optionally be operated in a regenerative mode (for example in the case of a hybrid vehicle). For this purpose, an electric machine can be provided which provides the function of a generator and can be selectively connected to the wheels and to an energy store such as a battery.

[0041] Such as Figure 1A As shown, the braking system 100 includes a master cylinder assembly 104 mountable on a vehicle bulkhead. A hydraulic control unit (HCU) 106 of the braking system 100 is functionally disposed between the master cylinder assembly 104 and the vehicle's four wheel brakes FL, FR, RL, and RR. The HCU 106 is implemented as an integrated assembly and includes multiple independent hydraulic components and multiple fluid inlets and outlets. In addition, a simulation device 108 (shown only schematically) fo...

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PUM

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Abstract

The invention relates to a calibration method for an electro-hydraulic motor vehicle braking system. The braking system comprises a piston for building up a hydraulic pressure in the braking system, a first actuator having an electric motor, and a second actuator having a brake pedal interface. The first actuator and the second actuator are both able to operate the piston, a first sensor detecting a change in state of the first actuator and a second sensor detecting a change in state of the second actuator. The calibration method begins with activation of the electric motor in order to operate the piston by means of the first actuator, the second actuator following the piston operation. During the piston operation, a first signal generated by the first sensor, which permits a conclusion to be drawn about an extent of the piston operation, and a second signal generated by the second sensor are detected. Following that, calibration of the first signal is carried out on the basis of the second signal, or vice versa.

Description

technical field [0001] The present disclosure relates generally to the field of electrohydraulic braking systems for motor vehicles. In particular, a calibration method for a sensor system installed in such a braking system is defined. Background technique [0002] DE 10 2011 116 167 A1 discloses an electrohydraulic braking system for a motor vehicle, which comprises a master cylinder assembly having a master cylinder and a piston displaceably accommodated in the master cylinder. Actuation of the piston causes a change in brake pressure (eg, brake pressure build-up) of wheel brakes fluidly coupled to the master cylinder. [0003] For actuating the piston, two actuators are provided which can act on the input-side end face of the piston. The first actuator comprises an electric motor and a transmission connected downstream of the electric motor and has the purpose of varying the brake pressure within the "brake-by-wire" BBW operating range. The second actuator allows mecha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T7/04B60T13/58B60T13/66B60T13/68B60T13/74
CPCB60T7/042B60T13/586B60T13/588B60T13/662B60T13/686B60T13/745B60T8/4077B60T2270/82
Inventor V·阿德勒K·舒拉夫克N·纳瑟尔K·斯查斯特
Owner LUCAS AUTOMOTIVE GMBH