US 11,529,938 B2Granted

Automatic adaptation of brake boost to different braking loads

AssigneeVolkswagen Aktiengesellschaft

InventorsFrank Borchers, Michael Schmalbruch, Leo Schineller

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Abstract

A method for operating an electromechanical brake booster. A pedal force is ascertained, a brake pressure is ascertained from the pedal force by an actuator, and the brake pressure applied to frictional brakes is set, thereby producing a vehicle deceleration. The actuator has a standard configuration wherein, in response to the pedal force, a brake pressure is ascertained that produces a specified standard deceleration of the motor vehicle if a specified disturbance variable has a specified standard value. The influence of the disturbance variable on the vehicle deceleration is compensated. The actuator has at least one control parameter for setting a compensation configuration, an actual value of the disturbance variable is detected, and the compensation configuration is set based on the respective difference between the ascertained actual value and the standard value.

Claims14

Dependent claims

A method for operating an electromechanical brake booster of a transportation vehicle, during a rolling motion of the transportation vehicle, to decrease a travel speed of the transportation vehicle, the method comprising:

capturing, by a sensor under control of a control device, a pedal force exerted on a brake pedal by a user;
ascertaining, by an adjusting unit under control of the control device, a brake pressure to be set in the friction brakes of the transportation vehicle based on the captured pedal force;
and
setting, by the brake booster under control of the control device, the brake pressure to cause a vehicle deceleration of the transportation vehicle that is dependent on the set brake pressure,
wherein the adjusting unit has a standard configuration in which the adjusting unit ascertains, with reference to the captured pedal force, the brake pressure to be set to cause a predetermined standard deceleration of the transportation vehicle, which is performed in response to at least one predetermined disturbance variable having a predetermined standard value, wherein the at least one predetermined disturbance variable changes the deceleration of the transportation vehicle for a given pedal force,
wherein the adjusting unit uses at least one adjusting parameter for setting a compensation configuration different from the standard configuration,
wherein an actual value of at least one disturbance variable is captured cyclically by a capture device and the at least one adjusting parameter is set cyclically prior to receipt of a braking request from the user in a closed loop, and
wherein the compensation configuration is set as a function of a respective difference of each captured actual value from the predetermined standard value, by setting the at least one adjusting parameter of the adjusting unit.

5 more elements

A control device for an electromechanical brake booster of a transportation vehicle, wherein the control device comprises:

a signal input for receiving an actual value of at least one disturbance variable;
and
a signal output for controlling an electric drive unit of the electromechanical brake booster,
wherein the control device implements a method for operating the electromechanical brake booster of the transportation vehicle during a rolling motion of the transportation vehicle to decrease a travel speed of the transportation vehicle, the method comprising the control device:
capturing, by a sensor, a pedal force exerted on a brake pedal by a user;
ascertaining, by an adjusting unit, a brake pressure to be set in friction brakes of the transportation vehicle based on the captured pedal force;
and
setting, by the electromechanical brake booster, the brake pressure to cause a vehicle deceleration of the transportation vehicle that is dependent on the set brake pressure,
wherein the adjusting unit has a standard configuration in which the adjusting unit ascertains, with reference to the captured pedal force, the brake pressure to be set to cause a predetermined standard deceleration of the transportation vehicle, which is performed in response to at least one predetermined disturbance variable having a predetermined standard value, wherein at least one predetermined disturbance variable changes the vehicle deceleration for a given pedal force,
wherein the adjusting unit has at least one adjusting parameter for setting a compensation configuration different from the standard configuration, wherein an actual value of the at least one disturbance variable is captured cyclically by a capture device and the at least one adjusting parameter is set cyclically prior to receiving a braking request from the user in a closed loop, and
wherein the compensation configuration is set as a function of a respective difference of each captured actual value from the predetermined standard value, by setting the at least one adjusting parameter of the adjusting unit.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/753,554Filed 31 Aug 2016
Priority: DE 10 2015 217 905.218 Sep 2015
Published: US 2018/0257617 A113 Sep 2018
Granted: 20 Dec 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

B60T 8/18
Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of…:…
B60T 8/172
Using electrical or electronic regulation means to control braking: determining control parameters used in the regulation, e.g. by calculations…
B60T 8/1837
Responsive to vehicle weight or load, e.g. load distribution: characterised by the load-detecting arrangements
B60T 8/245
Responsive to vehicle inclination or change of direction, e.g. negotiating bends: longitudinal vehicle inclination