US 2018/0297574 A1Published application

Method for detecting a leak of a hydraulic brake system of a vehicle

AssigneeContinental Teves AG & Co. oHG

InventorsJochen ZIMMERMANN, Thorsten ULLRICH

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Abstract

A method for detecting a leak of a hydraulic brake system of a vehicle having at least two wheel brakes. A slip control of the wheel brake assigned to the respective vehicle wheel is carried out by a respective pressure modulation unit. The pressure medium volume delivered by a brake pressure source is detected. A pressure sensor output identifies a model value for the pressure value detected by the pressure sensor. A differential value is determined which indicates the difference between the pressure medium volume delivered and the model value, and the differential value is compared with a threshold, and a leak is reported if the differential value exceeds the threshold.

Claims4

Dependent claims

A method for detecting a leak of a hydraulic brake system of a vehicle having a first brake circuit and a second brake circuit, the method comprising:

measuring brake pressure generated in the first and second brake circuits using corresponding pressure sensors during an ABS or ESC control operation;
determining a pressure medium volume delivered for the measured brake pressure by a speed sensor;
depending on the measured brake pressure, determining a model for the pressure medium volume delivered at the measure brake pressure by a control unit;
determining that a leak in the brake system exists if a difference between the pressure medium volume determined using the speed sensor and the pressure medium value exceeds a specified threshold.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 15/949,540Filed 10 Apr 2018
Priority: DE 10 2015 219 905.314 Oct 2015
Published: 18 Oct 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

B60T 17/221
Devices for monitoring or checking brake systems; Signal devices: procedure or apparatus for checking or keeping in a correct functioning…
B60T 8/4081
Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking: systems…
B60T 8/4872
Closed systems: pump-back systems
B60T 13/146
Master cylinder integrated or hydraulically coupled with booster: part of the system directly actuated by booster pressure

Family

Application15/949,540Continuation
US 2018/0297574 A1This patent

From the US filing history. Foreign family members aren’t listed.

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