Brake pressure modulator pilot unit
A pressure regulation and regulator technology, applied in the direction of brakes, brake components, control valves and air release valves, etc., can solve the problems of short valve switching time, high manufacturing cost, increased inertia, etc., to achieve the effect of reducing complexity
Active Publication Date: 2007-06-27
WABCO EURO BVBA SPRL
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Problems solved by technology
In addition to causing higher manufacturing costs, such a magnet also has to supply a higher electrical power, which of course does not result in a satisfactorily short valve switching time, because of the increased inertia involved in the size of the structure
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[0028] In all cross-sectional views of this figure, nonmagnetic (non-ferromagnetic) parts are shown as cross-hatched so that they can be easily distinguished from single-shaded magnetic parts.
[0029] In order to be technically appropriate, several designations 1, 2, 4, 5, 6, 17, 18, 21, 22 and 23 are adopted from D4 in order to identify devices having the same effect.
[0030] Fig. 1 shows the pneumatic valve control device of the present invention, which is especially used as the leading control unit 1 of the electronic air brake system; it can form a leading control pressure and provide it to two different brake pressure regulating circuits, the two The circuits are designated as the first and second brake pressure regulation circuits.
[0031] In this pilot control unit, a 3 / 2 solenoid valve 21 with two inputs 4, 5 and an output 6 is used as redundant valve, and a first valve regulator device 7 is used as the first brake pressure regulating circuit , a second valve regul...
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The invention relates to a valve control unit, made up of three valve units, preferably as a pilot unit (1) for two brake channels of an electropneumatic brake system, whereby each valve unit is embodied as a valve modulator device (7) for a braking pressure control circuit made up of an air inlet valve (22) with a primary solenoid (22a) and a bleed valve (23) with a secondary solenoid (23a), whereby each armature is provided with a common solenoid guide arrangement (10), controlled by the magnetic flux of a common magnetic coil (11). According to the invention, an independent operation of the armatures may be achieved, whereby, the flux through the secondary solenoid (23a) is weakened by a shunt (20) in the total magnetic flux circuit (3) which causes a switching delay for the secondary solenoid (23a) relative to the primary solenoid (22a) and, furthermore, the magnetic resistance of a non-magnetic disc (25) is effective for switch-off acceleration in the magnetic flux circuit (3) with energized secondary solenoid (23a), and weakens the field and causes the secondary solenoid (23a) to revert the spring-loaded base state thereof at a higher magnetic flux than the primary solenoid (22a).
Description
technical field [0001] The invention relates to a valve pilot control unit for a brake pressure regulator. Background technique [0002] From DE 10009116 A1 (hereinafter referred to as D1) a valve arrangement for a pilot control unit of a brake pressure regulator of an electropneumatic brake system (EBS) is known. As shown in Figure 2 of this document, the pneumatic circuit of the leading control unit for a brake regulation circuit of the brake pressure regulator comprises a 3 / 2 solenoid valve 21 as a redundant valve, a normally open 2 / 2 Solenoid valve 23 is used as a ventilation valve. As is known from the previous DE 42 27 084 A1 (FIG. 2 in document D2), redundant valves in such a circuit can usually also be used in a second brake control circuit. According to the design of the circuit, the leading control unit for the two brake regulation circuits thus comprises a 3 / 2 redundant valve for the two section circuits and separate 2 / 2 breather valves for each individual circ...
Claims
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IPC IPC(8): B60T8/32
CPCB60T8/327B60T15/027B60T8/362Y10T137/88005Y10T137/87917
Inventor D·弗兰克J·洛韦拉-利法特拉A·赛艾可A·泰西曼
Owner WABCO EURO BVBA SPRL