Method for checking the functionality of a braking system, and braking system

    公开(公告)号:US11465602B2

    公开(公告)日:2022-10-11

    申请号:US16763767

    申请日:2018-11-07

    Abstract: A method for checking functionality of a motor vehicle braking system. The braking system has a main module, including: hydraulically actuatable wheel brakes, pairs being assigned to respective brake circuits; at least one electrically actuatable wheel valve per wheel brake sets wheel-specific brake pressures; a pressure provision device actively builds up pressure in the wheel brakes; a pressure-medium reservoir at atmospheric pressure, and an auxiliary module, which has for each of two wheel brakes: a pressure sensor for measuring pressure in a wheel brake line; an open when deenergized isolating valve in the wheel brake line; a pump. At least one variable is measured to assess functionality of the braking system. Using least one acceptance criterion, and checked whether the variable satisfies the acceptance criterion. Determining at least one variable representing the viscosity of the brake fluid, and the at least one acceptance criterion depends on a variable representing viscosity.

    METHOD FOR OPERATING A BRAKING SYSTEM AND A BRAKING SYSTEM
    3.
    发明申请
    METHOD FOR OPERATING A BRAKING SYSTEM AND A BRAKING SYSTEM 审中-公开
    操作制动系统和制动系统的方法

    公开(公告)号:US20160236662A1

    公开(公告)日:2016-08-18

    申请号:US15025329

    申请日:2014-07-10

    CPC classification number: B60T8/3275 B60T8/171 B60T2201/03

    Abstract: A method for operating a brake system of a vehicle which includes a master brake cylinder which can be activated by the driver by a brake pedal, at least one driver-independent pressure source, at least one wheel brake to which a wheel speed sensor is assigned, and a brake activation sensor, wherein it is checked whether a hazardous situation is present, and in the case of a hazardous situation being detected the at least one driver-independent pressure source is activated. A hazardous situation is detected when the change in a measured deceleration over time or the absolute value of a measured deceleration exceeds a predefined hazard threshold value and a brake activation operation is detected. In addition, the invention relates to a brake system for a motor vehicle having brake assistance in hazardous situations which does not require a master brake cylinder pressure sensor.

    Abstract translation: 一种用于操作车辆的制动系统的方法,其包括可由驾驶员通过制动踏板启动的主制动缸,至少一个与驾驶员无关的压力源,至少一个车轮制动器,轮速传感器被分配给该制动器 以及制动器启动传感器,其中检查是否存在危险情况,并且在检测到危险情况的情况下,至少一个独立于驱动器的压力源被激活。 当测量的减速度随时间的变化或测量的减速度的绝对值超过预定的危险阈值并且检测到制动器启动操作时,检测到危险情况。 另外,本发明涉及一种在不需要主制动缸压力传感器的危险情况下具有制动辅助功能的机动车辆的制动系统。

    Method for operating a vehicle brake system

    公开(公告)号:US10913437B2

    公开(公告)日:2021-02-09

    申请号:US16328922

    申请日:2017-08-01

    Abstract: A method for operating a dual-circuit hydraulic brake system of a vehicle having an ABS function to feed back pressure medium from low-pressure reservoirs. When there is an autonomous pressure buildup request to increase brake pressure and an ABS control system is simultaneously activated, the following steps are carried out: monitoring the filling degree of the low-pressure reservoirs; emptying the low-pressure reservoir whose filling first reaches a defined threshold value; and if, during the execution of the low-pressure reservoir emptying process at the one low-pressure reservoir, the filling of the other low-pressure reservoir reaches the threshold value and the degree of emptying of the one low-pressure reservoir undershoots a defined threshold value, or the filling of the other low-pressure reservoir exceeds the threshold value by k/100, interrupting the low-pressure reservoir emptying process at the one low-pressure reservoir, and carrying out a low-pressure reservoir emptying process at the other low-pressure reservoir.

    Method for operating a brake system for motor vehicles, and brake system

    公开(公告)号:US10800388B2

    公开(公告)日:2020-10-13

    申请号:US16072333

    申请日:2017-02-20

    Abstract: A method for operating a motor vehicle brake installation. An electrically controllable pressure modulation device having a pump-valve arrangement is hydraulically arranged between the primary brake system and the front axle brakes. The pump-valve arrangement includes, for each front brake, a first valve, arranged between the inlet valve of the primary brake system and the brake, and an electrically activatable pump, with a suction and pressures ports. The pressure port is connected to the brake. In the presence of a predetermined condition of the primary brake system and of an actuation of the master brake cylinder by the driver, a build-up of brake pressure at the front axle brakes is performed by the pump-valve arrangement. The pressure set by the pump-valve arrangement is higher than the brake pressure in the master brake cylinder, whereas the brake pressure of the master brake cylinder prevails at the brakes of the rear axle.

    Method for operating a brake system of a motor vehicle, and brake system

    公开(公告)号:US10703347B2

    公开(公告)日:2020-07-07

    申请号:US16072949

    申请日:2017-02-20

    Abstract: A method for operating a brake installation of a vehicle. A first electrically controllable pressure provision device provides brake pressure for actuating hydraulically actuatable brakes. A first electronic open-loop and closed-loop control unit, and a first pressure detection device, measures brake pressure provided by a primary brake system. A secondary brake system between the primary system and a part of the wheel brakes has a second electrically controllable pressure provision device provides brake pressure for actuating at least the part of the brakes. A second electronic open-loop and closed-loop control unit, and at least one second pressure detection device, the signals of which are processed in the second electronic open-loop and closed-loop control unit. The secondary system monitors the primary system based on signals from the second pressure detection device and on a predefined brake pressure demand to build up a brake pressure corresponding to the predefined brake pressure demand.

    METHOD FOR OPERATING A VEHICLE BRAKE SYSTEM
    8.
    发明申请

    公开(公告)号:US20190248352A1

    公开(公告)日:2019-08-15

    申请号:US16328922

    申请日:2017-08-01

    Abstract: A method for operating a dual-circuit hydraulic brake system of a vehicle having an ABS function to feed back pressure medium from low-pressure reservoirs. When there is an autonomous pressure buildup request to increase brake pressure and an ABS control system is simultaneously activated, the following steps are carried out: monitoring the filling degree of the low-pressure reservoirs; emptying the low-pressure reservoir whose filling first reaches a defined threshold value; and if, during the execution of the low-pressure reservoir emptying process at the one low-pressure reservoir, the filling of the other low-pressure reservoir reaches the threshold value and the degree of emptying of the one low-pressure reservoir undershoots a defined threshold value, or the filling of the other low-pressure reservoir exceeds the threshold value by k/100, interrupting the low-pressure reservoir emptying process at the one low-pressure reservoir, and carrying out a low-pressure reservoir emptying process at the other low-pressure reservoir.

    METHOD FOR OPERATING A BRAKE SYSTEM FOR MOTOR VEHICLES, AND BRAKE SYSTEM

    公开(公告)号:US20190071059A1

    公开(公告)日:2019-03-07

    申请号:US16072333

    申请日:2017-02-20

    CPC classification number: B60T8/266 B60T8/4072 B60T8/4081 B60T8/4872

    Abstract: A method for operating a motor vehicle brake installation. An electrically controllable pressure modulation device having a pump-valve arrangement is hydraulically arranged between the primary brake system and the front axle brakes. The pump-valve arrangement includes, for each front brake, a first valve, arranged between the inlet valve of the primary brake system and the brake, and an electrically activatable pump, with a suction and pressures ports. The pressure port is connected to the brake. In the presence of a predetermined condition of the primary brake system and of an actuation of the master brake cylinder by the driver, a build-up of brake pressure at the front axle brakes is performed by the pump-valve arrangement. The pressure set by the pump-valve arrangement is higher than the brake pressure in the master brake cylinder, whereas the brake pressure of the master brake cylinder prevails at the brakes of the rear axle.

    METHOD FOR OPERATING A BRAKE SYSTEM OF A MOTOR VEHICLE, AND BRAKE SYSTEM

    公开(公告)号:US20190039583A1

    公开(公告)日:2019-02-07

    申请号:US16072949

    申请日:2017-02-20

    Abstract: A method for operating a brake installation of a vehicle. A first electrically controllable pressure provision device provides brake pressure for actuating hydraulically actuatable brakes. A first electronic open-loop and closed-loop control unit, and a first pressure detection device, measures brake pressure provided by a primary brake system. A secondary brake system between the primary system and a part of the wheel brakes has a second electrically controllable pressure provision device provides brake pressure for actuating at least the part of the brakes. A second electronic open-loop and closed-loop control unit, and at least one second pressure detection device, the signals of which are processed in the second electronic open-loop and closed-loop control unit. The secondary system monitors the primary system based on signals from the second pressure detection device and on a predefined brake pressure demand to build up a brake pressure corresponding to the predefined brake pressure demand.

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