Method for adapting the control strategy of a slip-control system of a vehicle in a μ-split-situation

    公开(公告)号:US10315634B2

    公开(公告)日:2019-06-11

    申请号:US15433605

    申请日:2017-02-15

    摘要: The disclosure relates to a method for adapting a control strategy of a slip-control system of a brake system of a vehicle in a μ-split situation, in which different wheel-specific brake pressures, are set at opposite wheels of a vehicle axle. The resulting brake pressure difference is limited. In some examples, to generate a brake pressure request, a maximum pressure difference value deviating from a reference pressure difference with a predefined tolerance value is determined on a wheel-specific basis for the wheels lying opposite one another. The reference pressure difference corresponds to the value of the current low-pass-filtered brake pressure difference, and the brake pressure request for each wheel is determined as a minimum of the wheel-specific brake pressure determined from the control strategy of the slip-control system, and from the sum of the average brake pressure of the wheel lying opposite and the wheel-specific maximum pressure difference value.

    Method for avoiding false excitations of a slip control system of a brake system of a vehicle

    公开(公告)号:US10293797B2

    公开(公告)日:2019-05-21

    申请号:US15379672

    申请日:2016-12-15

    IPC分类号: B60T8/173 B60T8/172 B60T17/22

    摘要: A method for avoiding false excitations of a slip control system comprises monitoring of a wheel speed signal for a predefined first monitoring time period for the start of a negative half-wave of an oscillation applied to a vehicle wheel, when a brake pressure gradient initiated by a brake start rises above a predetermined threshold. A ruck signal is derived from the wheel speed signal. An acceration signal is derived from the wheel speed signal during a predetermined second monitoring period. The wheel speed signal is monitored for a turning point of the ruck signal and a start of the acceleration signal. The oscillation imposed on the vehicle wheel is identified as a braking-induced vibration, and slip control is not carried out when the turning point of the ruck signal and the re-acceleration of the wheel are detected.

    Brake system and method for operating a brake system

    公开(公告)号:US10246067B2

    公开(公告)日:2019-04-02

    申请号:US15661928

    申请日:2017-07-27

    发明人: Dieter Burkhard

    摘要: A method for operating a brake system for motor vehicles comprises in a normal control mode of the system, a displacement of a piston for a pressure supply device is terminated, and inlet valves of the wheel brakes are closed in the event of a specified brake condition. The normal control mode is switched to a special control mode in the event of a specified condition for the pressure supply device. In the event of the specified brake condition in the special control mode, a displacement of the piston of the pressure supply device is terminated by outputting an actuation signal to the pressure supply device, and for at least one selected wheel brake, the corresponding inlet valve is kept open and the corresponding outlet valve is opened at least temporarily while the inlet valves of the remaining wheel brakes are closed.

    Actuator system and operating method for an actuator system

    公开(公告)号:US10232836B2

    公开(公告)日:2019-03-19

    申请号:US14127036

    申请日:2012-06-19

    摘要: The invention relates to an actuator system, in particular an electromechanical parking brake system, comprising an actuator, wherein the actuator is driven by a direct current motor that can be driven in both directions of rotation, wherein a control unit for controlling the movement of the direct current motor in an open-loop or closed-loop manner is provided. The core of the invention is that one or more pieces of information are supplied to a control unit, said information allowing the application force exerted by the electromotive actuator to be determined and compared to a predetermined minimum application force, and wherein the control unit emits at least one piece of information, signal or the like for requesting an auxiliary actuation to peripheral systems, components and/or electronic control units after the target to actual value comparison has shown that the determined, set application force is smaller than the predetermined minimum application force.

    Microcontroller system and method for safety-critical motor vehicle systems and the use thereof

    公开(公告)号:US10173692B2

    公开(公告)日:2019-01-08

    申请号:US15440331

    申请日:2017-02-23

    摘要: A microcontroller system for safety-critical motor vehicle systems is provided. The microcontroller system includes a plurality of subsystems arranged on a common chip. At least one of the subsystems has more than one channel and is designed to carry out a plurality of operating modes. The subsystems, in a first operating mode, are operated independently of each other and communicate with each other via an on-chip interface. In a second operating mode, at least one of the subsystems is operated by data transmission means and using non-local resources of at least one further subsystem and/or at least one of the subsystems is operating and at least one further subsystem is inactive. A method for operating such a microcontroller system and to the use thereof is also provided.