Wabco Gmbh

Wabco Europe Bvba

Zf Cv Systems Hannover Gmbh

Florian Schwagmeyer

Horst Eckert

A method for regulating a vehicle-actual-deceleration in a vehicle with an ABS brake system includes detecting the vehicle-actual-deceleration; determining a target vehicle deceleration and detecting at least one actual wheel rotational behavior. The method further includes calculating actuation times for actuation of pressure control valves of the ABS brake system associated with the wheels of the first vehicle axle and the wheels of the further vehicle axle and determining correction actuation times if at least one of the respective calculated actuation times is less than a minimum actuation time associated with the respective pressure control valve. Calculation of each of the respective actuation times is carried out at least for all of a first number of pressure control valves with which wheels are associated whose rotational behavior follows the at least one actual wheel rotational behavior.

Method for regulating a vehicle-actual-deceleration in a vehicle with an ABS brake system

A method for electronically controlling a vehicle deceleration of a brake slip-controlled vehicle comprising a pneumatic braking system includes detecting that at least one wheel of the vehicle has a brake slip that exceeds a setpoint brake slip; in response to detecting that at least one of the wheels of the vehicle has a brake slip that exceeds the setpoint brake slip, brake slip-controlling the at least one wheel in order to prevent a lockup of the at least one wheel; determining a braking effect caused by wheel brakes on the wheels of the vehicle; and adjusting brake pressures output at the wheel brakes of one or more non-brake slip-controlled wheels in order to adjust the induced braking effect. The brake pressures at the wheel brakes of all non-brake slip-controlled wheels are adjusted.

Method and device for electronic control of a vehicle deceleration of a brake slip-controlled vehicle

A method for adjusting brake pressures on pneumatically actuated wheel brakes of a vehicle includes, in a normal braking mode, continuously determining, by the brake control unit, at least one differential slip value as a difference between slip values of two wheels or axles of the vehicle, and determining, by the brake control unit, an interaxle braking distribution index for a relevant pair of axles by an assessment of a change in the at least one differential slip value within an evaluation interval. The method further includes, in a pressure control mode, using, by the brake control unit, the interaxle braking distribution index that is determined in the normal braking mode for the weighting of the control signals for the respective pair of axles.

Method for adjusting brake pressures on pneumatically actuated wheel brakes of a vehicle, brake system for carrying out the method, and vehicle

An electro-pneumatic tractor protection valve assembly () including a trailer supply input () for receiving a supply pressure, a trailer service output () for delivering a trailer supply pressure, a first supply input () for receiving a primary driver brake pressure, a second supply input () for receiving a secondary driver brake pressure, a dual brake valve () actuated by a brake pedal () and supplying the brake control pressures, a vent opening () for venting an internal conduit, a first electrically controlled pneumatic valve () to receive a first electric control signal for trailer assistance braking, and a trailer control output () for delivering a trailer brake control pressure. The valve assembly includes one single casing () accommodating the first supply input (), the second supply input (), the trailer supply input (), the trailer control output (), the vent opening () and the trailer service output ().

Tractor protection valve assembly and electro-pneumatic brake system of a tractor vehicle

A method for the adaptive control of a driver operation-dependent actual vehicle deceleration in a commercial vehicle includes determining an operating variable that indicates a displacement of a brake pedal of a brake valve demanded by the driver as well as an assistance deceleration demand, providing a mass-dependent feeling curve that associates a driver's deceleration demand with the operating variable, adapting the mass-dependent feeling curve if there is no assistance deceleration demand so that the determined operating variable is associated with an actually prevailing actual vehicle deceleration, specifying a target vehicle deceleration depending on a driver operation-dependent driver's deceleration demand determined from the corresponding feeling curve and the assistance deceleration demand if there is an assistance deceleration demand, and actuating a brake pressure corresponding to the target vehicle deceleration for adaptively adjusted, driver operation-dependent control of the actual vehicle deceleration.

Method for the adaptive control of a driver operation-dependent actual vehicle deceleration

A method for the temperature-dependent control of a pressure control valve of a vehicle comprising an inlet valve and an outlet valve includes detecting a predefined pressure difference to be controlled by the pressure control valve, determining a present valve body temperature, wherein, for this purpose, a temperature change proceeding from a starting temperature is considered depending on at least one detected valve body influencing variable, determining, depending on the pressure difference to be controlled and on the determined present valve body temperature, at least one of a temperature-adjusted pulse duration for the inlet valve and a temperature-adjusted pulse duration for the outlet valve, and controlling at least one of the inlet valve and the outlet valve of the pressure control valve via the particular temperature-adjusted pulse duration in order to effectuate the detected pressure difference at the determined valve body temperature.

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Heuerssen, Germany

Florian Schwagmeyer