Electronically controllable pneumatic brake system in a utility vehicle and method for electronically controlling a pneumatic brake system in a utility vehicle
An electronic control, pneumatic braking technology, applied in the direction of brake transmission, brakes, vehicle parts, etc., can solve the problems of difficult modification, increase assembly cost and cost, and achieve the effect of low wear and low air consumption
Active Publication Date: 2019-03-15
WABCO EURO BVBA SPRL
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Problems solved by technology
The disadvantage of all these solutions is that the additional pneumatic components increase the assembly effort and costs and are also very difficult to retrofit
Method used
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[0052] in accordance with Figure 1a and Figure 1b In the embodiment of the present invention, a section of an electropneumatic braking system 100a of a vehicle 200, in particular a commercial vehicle, is shown as a block diagram, wherein the electropneumatic braking system is implemented as an EBS braking system 100a, that is to say brake pre-braking Set to be electrically grounded in normal operation. For this purpose, EBS braking system 100 a has four wheel brakes 1 , 2 , 3 , 4 which are used to slow down wheels 5 , 6 , 7 , 8 of vehicle 200 . For deceleration, three brake circuits A, B, C are provided, each of which is assigned a pressure medium reservoir 20A, 20B, 20C in order to supply the respective brake circuit A, B, C with pressure medium and thus be able to A build-up of brake pressures p1 , p2 , p3 , p4 , pPB for the respective wheel brakes 1 , 2 , 3 , 4 is achieved. In each pressure medium accumulator 20A, 20B, 20C there is a corresponding reserve pressure pVA, ...
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The invention relates to an electronically controllable pneumatic brake system (100a) in a vehicle (200), comprising at least: wheel brakes (1, 2, 3, 4) for braking wheels (5, 6, 7, 8) of the vehicle(200), wherein a service-brake brake pressure (p1, p2, p3, p4) can be predefined to the wheel brakes (1, 2, 3, 4), in each case over a pneumatic path (X1, X2, X3, X4) which starts from a footbrake valve (11), and at least one electronically controllable monostable bypass valve (16; 16.1, 16.2), wherein the at least one monostable bypass valve (16; 16.1, 16.2) is arranged in at least one pneumaticpath (X1, X2, X3, X4), and the at least one monostable bypass valve (16) has two switched positions (Z1, Z2), wherein in a first switched position (Z1) of the monostable bypass valve (16; 16.1, 16.2)a service-brake brake pressure (p1, p2, p3, p4)can be predefined as a function of an activation pressure (pF) which is generated by manual activation of the footbrake valve (11). According to the invention there is provision that in a second switched position of the monostable bypass valve (16; 16.1, 16.2) the service-brake brake pressure (p1, p2, p3, p4) can be predefined as a function of a supply pressure (pVA, pVB, pVC) which is present in a pressure medium supply (20A, 20B, 20C), wherein the service-brake brake pressure (p1, p2, p3, p4) can be generated by switching over the monostable bypass valve (16; 16.1, 16.2) only as a function of the activation pressure (pF) and / or as a function of the supply pressure (pVA, pVB, pVC) in order to produce electropneumatic redundancy.
Description
technical field [0001] The invention relates to an electronically controllable pneumatic braking system in a commercial vehicle and to a method for electronically controlling a pneumatic braking system. Background technique [0002] In vehicles with a pneumatic brake system, in particular commercial vehicles, the control unit (ECU) can electronically actuate the axle modulators assigned to the axles in order to control the brake pressure. In this case, the electronic control takes place either as a function of the driver's intention preset via the foot brake valve or as a function of an automatically preset target deceleration of the vehicle. The axle modulator then pneumatically generates the corresponding service brake pressure, which is regulated on the brake cylinders of the service brakes of the braking system. [0003] Alternatively, the axle modulator can also be actuated pneumatically in that a service brake control pressure corresponding to the driver's will is pre...
Claims
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IPC IPC(8): B60T13/68B60T13/66
CPCB60T13/683B60T13/662
Inventor 奥利弗·伍尔夫
Owner WABCO EURO BVBA SPRL