Guide sleeve for guiding a collar of a relay valve for an electropneumatic modulator

Patent metadata

Field	Value
Publication number	US-11738731-B2
Application number	US-201917272438-A
Country	US
Kind code	B2
Filing date	Aug 5, 2019
Priority date	Sep 6, 2018
Publication date	Aug 29, 2023
Grant date	Aug 29, 2023

Abstract

A guide sleeve for guiding a collar of a relay valve for an electropneumatic modulator for a brake system for a vehicle, includes: a guide section configured to be couple-able to a counterpart guide section of the collar of the relay valve so as to allow guidance of the collar along the guide section; and a holding section configured to fasten the guide sleeve in a positively locking manner in a housing of the relay valve. Also described are a related guide sleeve device, and a relay valve, and a related method.

First claim

The invention claimed is:

1. A guide sleeve for guiding a collar of a relay valve for an electropneumatic modulator for a brake system for a vehicle, comprising:
a guide section couple-able to a counterpart guide section of the collar of the relay valve for the electropneumatic modulator for guiding the collar along the guide section;
a holding section to fasten the guide sleeve in a positively locking manner in a housing of the relay valve;
wherein the electropneumatic modulator includes:
a reservoir connection for a supply of compressed air from a reservoir;
a pneumatic control inlet for the supply of compressed air from the reservoir in response to a pneumatic control signal; and
a brake outlet for outputting a brake pressure to a wheel brake device,

wherein a relay piston and the guide sleeve device are received one above the other in a receiving chamber of a housing, wherein the brake outlet and the reservoir open into the receiving chamber,
wherein the relay valve is configured to open or close a fluidic connection between the reservoir connection and the brake outlet by a movement of the relay piston,
wherein the receiving chamber includes a control chamber section which, controlled by the electrical control signal, is charge-able with supplied compressed air to effect a switching movement of the relay piston,
wherein the guide sleeve is received in or on the relay valve, and the guide sleeve is configured to guide the collar of the relay valve and/or fasten the collar in the housing, wherein the guide section is couplable to or in a counterpart guide section of the collar of the relay valve for guiding the collar along the guide section, and wherein a collar spring is braced between the collar and the guide section.

2. The guide sleeve of claim 1 , wherein the holding section forms at least one detent hook and/or one bayonet.

3. The guide sleeve of claim 1 , wherein the guide section and the holding section extend to two opposite sides of the guide sleeve.

4. The guide sleeve of claim 1 , further comprising:
a central section which is formed between the guide section and the holding section and which is of substantially circular-ring-shaped or hollow frustoconical form.

5. The guide sleeve of claim 1 , wherein the holding section extends away from an edge section of a bottom side of the central section, and/or wherein the guide section extends away from a substantially central region of a top side, arranged opposite the bottom side, of the central section.

6. The guide sleeve of claim 4 , further comprising:
at least one axial rib which extends away from a bottom side, facing toward the holding section, of the central section and/or which has an extent axis which is arranged so as to run parallel to the guide section.

7. The guide sleeve of claim 4 , further comprising:
at least one radial rib which extends radially between a sleeve passage opening of the guide sleeve and the holding section on a bottom side, facing toward the holding section, of the central section.

8. The guide sleeve of claim 1 , wherein the guide section forms an outer sleeve and an inner sleeve which is enclosed by the outer sleeve, and wherein the inner sleeve surrounds a sleeve passage opening of the guide sleeve.

9. The guide sleeve of claim 1 , wherein the guide sleeve is of unipartite and/or funnel-shaped form.

10. A guide sleeve device, comprising:
a guide sleeve for guiding a collar of a relay valve for an electropneumatic modulator for a brake system for a vehicle, including:
a guide section couple-able to a counterpart guide section of the collar of the relay valve for the electropneumatic modulator for guiding the collar along the guide section; and
a holding section to fasten the guide sleeve in a positively locking manner in a housing of the relay valve;

wherein an inner diameter of the collar is equal to or smaller than an inner diameter of the guide section of the guide sleeve;
wherein the electropneumatic modulator includes:
a reservoir connection for a supply of compressed air from a reservoir;
a pneumatic control inlet for the supply of compressed air from the reservoir in response to a pneumatic control signal; and
a brake outlet for outputting a brake pressure to a wheel brake device,

wherein a relay piston and the guide sleeve device are received one above the other in a receiving chamber of a housing, wherein the brake outlet and the reservoir open into the receiving chamber,
wherein the relay valve is configured to open or close a fluidic connection between the reservoir connection and the brake outlet by a movement of the relay piston,
wherein the receiving chamber includes a control chamber section which, controlled by the electrical control signal, is charge-able with supplied compressed air to effect a switching movement of the relay piston,
wherein the guide sleeve is received in or on the relay valve, and the guide sleeve is configured to guide the collar of the relay valve and/or fasten the collar in the housing, wherein the guide section is couplable to or in a counterpart guide section of the collar of the relay valve for guiding the collar along the guide section, and wherein a collar spring is braced between the collar and the guide section.

11. The guide sleeve device of claim 10 , wherein the counterpart guide section of the collar and the guide section are formed so as to seal off a gap between the counterpart guide section and the guide section.

12. A relay valve for an electropneumatic modulator, comprising:
a housing;
a guide sleeve device, including:
a guide sleeve for guiding a collar of a relay valve for the electropneumatic modulator for a brake system for a vehicle, including:
a guide section couple-able to a counterpart guide section of the collar of the relay valve for the electropneumatic modulator for guiding the collar along the guide section; and
a holding section to fasten the guide sleeve in a positively locking manner in a housing of the relay valve;
wherein an inner diameter of the collar is equal to or smaller than an inner diameter of the guide section of the guide sleeve, and

wherein the guide sleeve device is arrangeable or arranged in the housing; and

a relay piston, which is arrangeable or is arranged in the housing, for moving the collar along the guide section of the guide sleeve;
wherein the electropneumatic modulator includes:
a reservoir connection for a supply of compressed air from a reservoir;
a pneumatic control inlet for the supply of compressed air from the reservoir in response to a pneumatic control signal; and
a brake outlet for outputting a brake pressure to a wheel brake device,

wherein a relay piston and the guide sleeve device are received one above the other in a receiving chamber of a housing, wherein the brake outlet and the reservoir open into the receiving chamber,
wherein the relay valve is configured to open or close a fluidic connection between the reservoir connection and the brake outlet by a movement of the relay piston,
wherein the receiving chamber includes a control chamber section which, controlled by the electrical control signal, is charge-able with supplied compressed air to effect a switching movement of the relay piston,
wherein the guide sleeve is received in or on the relay valve, and the guide sleeve is configured to guide the collar of the relay valve and/or fasten the collar in the housing, wherein the guide section is couplable to or in a counterpart guide section of the collar of the relay valve for guiding the collar along the guide section, and wherein a collar spring is braced between the collar and the guide section.

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Roether Friedbert
• Krahl Martin

Classifications

• B60T15/027 Primary

  in pneumatic systems · CPC title

• F16K31/42

  by means of electrically-actuated members in the supply or discharge conduits of the fluid motor (F16K31/40 takes precedence) · CPC title

• B60T15/00 Primary

  Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00 (valve structures responsive to a speed condition B60T8/34; valves in general F16K) · CPC title