ACOUSTICALLY DAMPENED DUAL PATH DUAL PURGE VALVE ASSEMBLY

Abstract

The present invention, sealing element that dampens the acoustics of the dual path dual purge valve assembly is provided, that is incorporated into the valve itself, further the element shall absorb the kinetic energy of the impact and prohibit the sound transmission, due to its unique shape, configuration, angle, and placement, thereby obviating additional requirements of any type of decoupling devices. Further, the invention modifies dual purge valve assembly, to adequately and securely, install the sealing element. The sealing element is installed on the big moving core, which reduces the noise from touchdown.

Claims

1. An acoustically dampened dual path dual purge valve assembly comprising of: a. a housing (106) having an inlet and an outlet for purge flow; b. a fix core (111) fixed into said housing (106), said fix core having an upper end and a lower end, said upper end having at least one protruding extension; c. a big moving core (102) placed at least one big spring, wherein said big spring is placed around said extension of said fix core; d. a small moving core (105) placed within the big moving core (102), said small moving core placed on at least one small spring (104), wherein said small spring is placed on said extension of said fix core; e. a sealing element (101) placed on the top of said big moving core; f. a core guider (112) attached laterally to the housing (102); and g. a threaded pin inserted in the lower end of said fix core; wherein: said sealing element (101) is placed on top of said big moving core to limit its movement and is laterally supported via said core guider; the sealing element dampens the acoustics of the dual path dual purge valve assembly absorbs the kinetic energy of the impact, prohibits the sound transmission and generation; and said sealing element (101) has wing like contour and configuration on at least one terminal surface and having a ribbed side contour and configuration on at least one lateral side, allowing the sealing element to compress on the ribbed side to absorb impact and minimize noise.

2. The dual valve assembly as claimed in claim 1, wherein the sealing element (101) of the present invention is an elastic sealing element or thermoplastic or elastomeric element.

3. The dual valve assembly as claimed in claim 1, wherein the sealing element (101) that prevents plunger of the duty cycle valve to directly impact the housing of the valve, thus minimizing or avoiding structural borne noise.

4. The dual valve assembly as claimed in claim 1, wherein the any material with significant heat resistant and elastic property can be used as the sealing element.

5. The dual valve assembly as claimed in claim 1, wherein in normal duty cycle where less purging is required only small moving core is moved the sealing element prevents impact of the small moving core on to the big moving core.

6. The dual valve assembly as claimed in claim 1, wherein in turbo boosted mode requiring maximum purge flow, both the big and small moving core moving intermittently, the sealing element prevents the noise due to impacts of the small moving core on to the big moving core, and that of the big moving core on to the housing.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:

[0032] FIG. 1 illustrates the placement of the sealing element in the dual purge dual valve;

[0033] FIG. 2 illustrates the working of an acoustically sealed dual path dual purge valve assembly;

[0034] FIG. 3 illustrates the structural conformation of the sealing element according to the most preferred embodiment;

[0035] FIGS. 4a and 4b compare the sealing assembly provided in a conventional dual purge valve assembly and the acoustically sealed dual path dual purge valve assembly;

[0036] FIG. 5 illustrates the working of a conventional dual purge valve assembly without rubber sealant; and

[0037] FIG. 6 illustrates the conventional single purging valve elucidating the sealing element.

DETAILED DESCRIPTION OF THE INVENTION

[0038] The present invention will now be described more fully hereinafter with reference to the accompanying drawings in which a preferred embodiment of the invention is shown. This invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiment set forth herein. Rather, the embodiment is provided so that this disclosure will be thorough, and will fully convey the scope of the invention to those skilled in the art.

[0039] FIG. 1, illustrates the placement of the key embodiment of the present invention; sealing element 101, big moving core 102, bush 103, small spring 104, small moving core 105, housing 106, fix core 111 and core guider 112. The placement of the sealing element 101 minimizes the structural borne noise due to indirect impact of the plunger on the housing 106 of the dual path dual purge valve assembly. Although the figure elucidates the most preferred wing shaped configuration provides wing shaped sealing element that absorbs the kinetic energy of the impact and prohibits the sound radiation. Although a shape has been defined but there may be other shapes with similar function of providing recoil action may be also installed such as anvil shape, or a ribbed shaped configuration on at least one side. Further, a recoil action has been shown at one end only and marked with arrow head to show movement, however such wing shaped configuration may be provided at the other end of the sealing element 101.

[0040] FIG. 2, illustrates the working of an acoustically sealed dual purge valve assembly; as shown the figure illustrates the working in case the valve is operated in duty cycle mode of operation, wherein the purging is done from the Canister Port 107, and regulated by the valves (Low Flow Valve 108, High Flow Valve 109) and Engine Port 110. The Low Flow Valve 108 mainly operates via the small spring 104 moving the small moving core 105 retracted during normal duty cycle, there by opening the valve intermittently. The High Flow Valve 109 operates by moving the big moving core 102, axially and intermittently. The working is illustrated in case the valve is operated in duty cycle mode, wherein the small moving core 105 of the valve moves between its two end positions against the small spring 104, i.e. the fixed core 111 and the big moving core 102. The big moving core 102 is kept in place by the outer spring (not shown) which comprises of lateral orifice for allowing the purge flow, when closed. During operation, the small moving core 105 is guided by a bush 103, which is assembled into the big moving core 102. The flow through the big moving core 102 is enabled through radial communicating orifices in the armature. The orifice in the centre of the big moving core 102 determines the real amount of the flow.

[0041] FIG. 3 illustrates the structural conformation of the sealing element. The figure provides one of the most preferred configurations, which may be varied. The sealing element is designed with shape, contour and configuration to provide a recoil movement. In the most preferred embodiment of the present invention, the sealing element is designed to mimic a wing like contour at the other side of the sealing element to absorb the kinetic energy of the impact and prohibit the sound transmission, thereby obviating additional costly coupling devices.

[0042] FIG. 4, compares the sealing assembly of a conventional dual purge valve assembly and the acoustically sealed dual purge valve assembly. The conventional dual purge valve assembly has a flat sealing element 201 and acoustically sealed dual purge valve assembly showing a wing shaped configuration of the sealing element 101, that absorb the kinetic energy of the impact. The wing shaped configuration of the sealing assembly 101, is seen in an anvil shaped configuration. Although, the shapes with similar function of providing recoil action may be also installed such as anvil shape, or a ribbed shaped configuration on at least one lateral side. Further, the sealing assembly 101 may have wing shaped configuration or shapes with similar function of providing recoil action may be also installed such as anvil shape, or a ribbed shaped configuration on at least one terminal end.

[0043] FIG. 5, illustrates the working of a conventional dual purge valve assembly without an acoustic decoupling sealant (205); wherein the purging is done from the Canister Port 201, and regulated by the valves (Low Flow Valve 202, High Flow Valve 203,) and Engine Port 204. The Figure is further zoomed in to magnify the conventional sealing element, showing the flat configuration of the sealing element.

[0044] FIG. 6, illustrates the conventional purging valve and its sealing element, comprising of nozzle 301, moving core 302, spring 303, housing 304, coil 305, screw 306, sealing rubber 307, bobbin 308 and sealant 309. The present invention can also be accommodated into such devices to act as acoustic sealant and wing shaped configuration.

[0045] Accordingly, in most preferred embodiment of the present invention is proposed an acoustically dampened dual path dual purge valve assembly comprising of: [0046] a. a housing (106) having an inlet and an outlet for purge flow; [0047] b. a fix core (111) fixed into said housing (106), said fix core having an upper end and a lower end, said upper end having at least one protruding extension; [0048] c. a big moving core (102) placed at least one big spring, wherein said big spring is placed around said extension of said fix core; [0049] d. a small moving core (105) placed within the big moving core (102), said small moving core placed on at least one small spring (104), wherein said small spring is placed on said extension of said fix core; [0050] e. a sealing element (101) placed on the top of said big moving core; [0051] f. a core guider (112) attached laterally to the housing (102); and [0052] g. a threaded pin inserted in the lower end of said fix core; [0053] wherein: [0054] said sealing element (101) is placed on top of said big moving core to limit its movement and is laterally supported via said core guider; [0055] the sealing element dampens the acoustics of the dual path dual purge valve assembly absorbs the kinetic energy of the impact, prohibits the sound transmission and generation; and [0056] said sealing element (101) has wing like contour and configuration on at least one terminal surface and having a ribbed side contour and configuration on at least one lateral side, allowing the sealing element to compress on the ribbed side to absorb impact and minimize noise.