Title:
AUTOMOTIVE SELF-ADJUSTABLE DAMPER WITH A SELF-CORRECTING DISSIPATION CHARACTERISTIC
Document Type and Number:
WIPO Patent Application WO/2000/079148
Kind Code:
A2
Abstract:
An automative self-adjustable damper having a progressive damping characteristic meant to be used with vehicles for damping the swing of the wheels, chassis, carosserie, the drivers and passengers seats, the engine set as well as in parachoke bars for impact energy absorbtion. This shock absorber is made up of several systems: energy dissipation system, rod volume compensation system, the guiding scaling system and the resistance part protecting all these systems.
Inventors:
NICULESCU ADRIAN IOAN (RO)
Application Number:
PCT/RO2000/000012
Publication Date:
December 28, 2000
Filing Date:
June 05, 2000
Export Citation:
Assignee:
NICULESCU ADRIAN IOAN (RO)
International Classes:
F16F9/06; F16F9/36; F16F9/48; (IPC1-7): F16F9/48
Foreign References:
| US2944639A | 1960-07-12 | |||
| FR553667A | 1923-05-29 | |||
| FR2479386A1 | 1981-10-02 | |||
| US2332161A | 1943-10-19 |
Other References:
None
Download PDF:
Claims:
CLAIMS
| 1. | !. Automotive selfadjustable damper with selfcorrecting dissipative characteristic made up of a piston (2) with checking rebound valve (17) and checking compression valve (16), running due to a rod inner cylinclre (, Otln whose length there are checking rebound valves (18) and checking compression valves (19) and probably filling rebound valves (20) and filling compression valves (2)) and closed at its ends by a superior block (5) containing a guide (6) and may be a checking rebound valve ( ! 4) and probably a filling compression valve (15) and through an inferior block (4) containing probably a checking compression valve (12) and probably a filling rebound valve (13), so that the unit should contain at least a checking rebound valve (18) and a checking compression valve (19), which can be even one (18) or (19) being checking rebound valve or checking compression valve, placed in the inner cylinder (3) as well as at least a filling rebound valve (13)/ (20) and at least one fillingfillingcompression valve (15)/(21), placed at the ends, all beingvalves permanently floated, state favoured by the oil reserve above the valves, with at least the volume of the stroke of the rod (1), maintained in a dynamic regime through a superior labirynth system (7), wllole unitbeing introduced in an outer cylinder (8) having the role of an oi ! tank, protection, strength, closed by a lid (9) containing an air volume at least equal with the one of the rod stroke, assuring the sealing of the rod (1) through a sealing (10) fitting, solution determining small damping forces at the beginning of the rebound, respectively compression stroke, due to the fact that the liquid is discharged through several valves, which favour the returning of the oscilating mass in the medium position and the comfort, while when the piston (2) approches to ends the damping forces increase due to the reduction of the active checking valves number assuring the breaking of the oscilatory mass movement, having favourable consequences on the stability and on the decrease of the impact at the end of the stroke, the solution being accomplished with the unit either nonpressurized or presurized at a low pressure for improving the damping characteristic stability, either medium pressurized for medium upward forces, or highly pressurized for high upward forces when using it as a balancer. |
| 2. | Automotive selfadjustable damper with selfcorrecting dissipative characteristic according to the claim 1, characterized by the fact that for reducing the dimensions and for simplicity, the superior (27) and inferior (29) blocks, contain or not a filling valve (28), (30) respectively and the inner cylinder (22) contains the checking (23) valves and probably a single filling rebound valve (26) and a single filling compression valve (26), at ends, so that the unit should contain only one fining rebound valve (26)/ (30) and only one filling compression valve (25)/(28). |
| 3. | damperwithselfcorrectingdissipativeselfadjustable <BR> <BR> characteristic according to claims l and 2 characterized hy the fact that the rod (1) is guided both by the guidance (6) in the superior block (5) and by a guidance attheclosinglid(31)nearthesealingelement(32)forabettertaking(33)placed over of the lateral strains and a better centring of the sealing element (32) as to the guidance(33). |
| 4. | damperwithselfcorrectingdissipativeselfadjustable characteristic according to the claims 1 and 2, characterized by the fact that for a better takiiio over of the lateral forces and a better centring, the superior block (34) contains besides a checking rebound valve (35) and a Filling compression valve (36), both the guidance (37) and the sealing element (D8) the labirynth system (39) being specific to the new configuration and the sealing of the closing lid (40) as to the (34)beingachievedthroughasealingelement(41).block. |
| 5. | Automotive selfadjustable damper with selfcorrecting dissipative characteristic according to claims 1,2,3 and 4, characterized by the fact that the piston (2) is placed to the center of the rod (42) this being guided and by a guidance (43) placed in the inferior block (44) containing also a checking compression valve (46) and a filling rebound valve (47). the rod (42) being sealed in the lower part by a sealing (45) element, placed in the inferior part of the outer cylinder (199). solution in which the labirynth system and the rod volume compensating system are necessary only when the diameters of the rod are unequal, so that the closing lid (48) becomes smaller. selfadjustabledamperwithselfcorrectingdissipative6.Automotive characteristic according to claims 1, 2, 3 and 4, characterized by the fact that the inner cylinder (50) has checking valves (5T) and filling valves (52), on the upper part placed at the end of some pipes (53), (54), (55) and (56), (57), (58) placed in the lower part of the outer cylinder (60), case in which the upper labyrinth systems replaced hy some ailayers (59) placed in the medium area, the outer cylinder (60), the superior block (61), the closing lid (62) and the sealing (63), specific.(65)being 7. Automotive selfadjustable damper with selfcorrecting dissipative characteristic according to claims 1,2,3,4 and 5, characterized by the fact that the rod volume compensation is achieved with the liquid within an enclosure (_q) of a lateral chamber (66) fixed on the closing lid (67), with which communicates through a hole (r), forced by the pressure of the gas in an enclosure (s) formed on the bottom of the lateral (66) chamber and the pleated tube (68) separating the liquid from the gas, solution permitting the working no matter the position. selfadjustabledamperwithselfcorrectingdissipative8.Automotive characteristic according to claims 1,2,3, 4 and 5, characterized by the fact that the rod votume compensation is accomplished with the hquid contained in a lateral chamber (74),indirectcontactwiththeatmospherethroughtherespectively respectively(y)andcommunicatingwiththelid(71)respectively(75)holes(v) through a connecting tube (72), respectively directly, depending on Solution, the favouredbythepressurizationofthegasintroducedincompensationbeing enclosures (t) respectively (w) placed in chamber (70) respective) (74), situation in which (v)/(y)areclosedafterpressurization.holes 9. damperwithselfcorrectingdissipativeselfadjustable characteristic according to claims 1,2,3,4 and 5, characterized by the fact that the compensationisachievedwiththepressurizedbladder(77)placedrodvolume between the inner cylinder (3) and the outer cylinder (78), this, as well as the (79)containingaguidance(80),acheckingreboundvalve(81)superiorblock and compressionvalve(82),aswellastheclosinglid(83)containingthefilling rod (1)sealing element (84) elementforsealingthelid(83)withtheouterthe cylinder (78) being specific. selfadjustabledamperwithselfcorrectingdissipative10.Automotive characteristic according to claims 1, 2,3,4 and 5, charactelized by the fact that for the rod volume compensation one uses the liquid contained in an exterior pleated tube (86), concentric with the outer cylinder (87) and fixed on it by two rings(88),transferedthroughthecommunicationholes(b')constrictedclamping inside the cylinder (87) due to the pressure created by the tensioning of the pleated tube (86) with the springs (89), fixed in the housing (90) solidary with the outer cylindrer (87) communicating with the atmosphere through the holes (d') or by the pressure of the gas in the chamber (c) between the pleated tube (86) and the housing (90), case in which the holes (d') are closed after presurization, or by both solutions. selfadjustabledamperwithselfcorrectingdissipative11.Automotive characteristic according to claims 1,2, 3 and 4, characterized by the fact that for the compensating the rod volume one uses the hquid contained in a chamber (e) at the inferior extension of the outer cylinder (94) forced to communicate with the lateral enclosure theinnercylinder(3)andtheoutercylinder(94),between through the holes (i') in inferior block (93), by the floating piston (95), pushed by the pressurized gas located in enclosure (jazz between the floating piston (95) and the end of the cylinder. |
| 6. | 12 Automotive selfadjustable damper with selfcorrecting dissipative characteristic according to claims 1,2,'l and 4, characterized by the fact that for therodvolumeoneusestheliquidcontainedinachamber(l'),thecompensating located in the ! ower extension of the outer cylinder (102), forced to communicate enclosure(o')placedbetweeninnercylinder(3)andoutercylinderwithlateral theholes(p'),bythefloatingpiston(103),locatedinthesupport(102)through (101) solidary with the outer cylinder (102), pushed by the pressurized gas from chamber (n') placed at lower end of the outer cylinder (102), which can theexteriorthroughthehole(r')inoutercommunicatewith cylinder the floating piston (103) stroke being limited by the stoppers (104), (105) placed in the support (101). selfadjustabledamperwithselfcorrectingdissipative13.Automotive characteristic according to claims 1,2, 3 and 4, characterized by the fact that for therodvolumeitusestheliquidinachamber(s'),locatedinthethecompensation oftheoutercyclinder(108),forcedtocommunicatewiththelaterallowerextension enclosure (x'), innercylinder(3)andtheoutercylinder(108)throughthe (z')andlateronthroughtheholes(y')onthesupport(109)solidarywiththeholes the lower part of the outer cylinder (108), by the floating piston (110), driven by the pressure of the gas in chambrer (u) in the support (109), the piston stroke being limited by stoppers (I 1 1), (1 12), placed on me support walls (109). |
| 7. | 14 damperwithselfcorrectingdissipativeselfadjustable characteristic according to claims 1,2,3,4,5,6,7,8,9,10,11,12 and 13, characterized by the fact that ior building simplicity for différent sections or all along its length, the inner cylinder (117) has its checking valves reduced to calibrated holes/slots (d''),thenumberofthesebeingaccordingtothedesireddamping(b''),(c''), characteristic, at its ends the inner cylinder (117) may have or not a filling rebound valve (119) and/or a filling compression valve (118), the piston (122) does not have valves, the superior block (115) may have or not a hole (a") as a valveand/orafillingcompressionvalve(120)andtheinferiorcheckingrebound block (116) may have or not a hole (e''), as a checking compression valve and/or a filling rebound valve (121), so that the unit should contain at least a filling rebound valve (I 19)/(l21) and at least a filling compression valve (118)/ (120). |
| 8. | Automotive selfadjustable damper with selfcorrecting dissipative characteristic according to claims 14,and thecharacterizedby fact that for building simple, sections of the orcylinder all the inner cylinder (123) are made from a poros material with a controlled capilarity and the superior block (125) contains only a filling compression valve (124) and inferior block (127) contains only a filling rebound valve (126). |
| 9. | Automotive selfadiustable damper with selfcorrecting dissipative characteristic according to claims 1, 2, 3,4,5,6,7,8,9,10, 11, 12,13,14 and 15, characterized hy the fact that for damping characteristic uniformization and increasing the comfort for small unevennes of the ground, it uses a piston (129) containing an elastic membrane (130) inside, formed by the walls of the piston (129) two enclosures (f), (g''), the membrane (130) distorted by the pressure difference of the liquid entering the two chambers through the calibrated holes (h''), i) ou the faces ouf the piston (129), the membrane (130) being controlled or not hy two springs (131), (132) supported on the faces of the piston () 29), the system sensibility depending on the membrane (130) elasticity, springs (131), onthenumber,surfaceandformoftheslots(h''),(i'')whichand permit the access of the liquid in the piston, the membrane stroke being controlled by stoppers (133), (134) placed on the inner sides of the piston. |
| 10. | Automotive selfadjustable damper with selfcorrecting dissipative characteristic according to claims 1,2,3,4,5,6,7,8,9,10,11, 12, 13, 14 and 15, characterized by the fact that for damping uniformization and the increase of tine comfort for small unevenness of the ground, uses a piston (136) containing inside two placedoneithersideofacentraldiaphragm(139),(137),(138) placed in the center of the piston (136), forming four chambers (fUk"m"). (m"), the chambers (k''),(l'') on either side of the diaphragm (139) may contain or not a pressurized gas and communicating between them through some calibrated holes (p) in diaphragm (139) and the chambers (j''),(m'') placed on the superior and inferior part of the piston (136), communicating with th inner cylinder through some calibrated holes (n''), (o"), the two elastic membranes (137), (138) may be controlled or not by springs (140), (141), (142),(143), placed between the wall of the piston (136). the membranes (137), (138) and diaphragm (139), whose strokes to the interior are limited by the bumpers (145), (146), placed on the diaphragm (139) and to the exterior being controlled by bumpers (144), (147), placed on the inner sides of the piston (136), the sensibility of the system depending on the membrane (137), (138) elasticity on the springs (140), (141), (142), (143) elasticity, the pressure of the gas in the central enclosures (k''), (1") and on the number, surface and form of the inner slots (f) and of the exterior ones (n''), (o which permit the access of the liquid in the piston. |
| 11. | Automotive selfadjustable damper with selfcorrecting dissipative characteristic according to claims 1, 2, 3,4,5,6,7,8,9,10,11,12,13, 14 and 15, characterized by the fact that for damping characteristic uniformization and increase of the contort for small unevenness of the ground, it uses a piston (148), containing inside two little pistons (149), (150) of equal or unequal diameters placed in two chambers (f) (r"), formed by a diaphragm (151) placed in the centre of the piston (148) and solidary with this, containing or not communication slots (u''), behind (. he pistons (149), (150), being introduced or not presurized gas, these being driven by the pressure of the liquid enterin5 the two chambers (q) (r''), (s''),(t'')onthefacesofthepiston(148),thelittlepistonsslots (149), (150) having the strokes controlled or not and through four springs (154), (157),thestrokeofthelittlepistons(149),(150)totheinterior(155),(156), being limited by bumpers (159), (160) placed on the diaphragms (151) and to the exterior being controlled by the bumpers (158), (161) placed on the inner sides of the piston (148), the sensibility of the system depending on the pressure of the gas between the (150)and/orthesprings(154),(155),(156),(157)(149) elasticity,elasticity,on the andtheformoftheinteriorslots(u'')andofsurface the exterior ones (s''), (t''), which allow the acces of the liquid in the piston. selfadjustabledamperwithselfcorrectingdissipative19. |
| 12. | Automotive toclaims1,2,3,4,5,6,7,8,9,10,11,12,13,14and15,characteristicaccording thefactthatfordampingcharacteristicuniformizationandthecharacterizedby increase of the confort for small unevenness of the ground, it uses a piston (162) containing two little pistons inside, one (163) cont : ainingr not a diaphragm (165) with or without calibrated holes (z"), defining an enclosure (w"), being located otherpiston(164),thelittlepistons(163),(164)formingintheinteriorinsidethe of piston (162) two enclosures (v"), (z"), which communicates with inner cylinder through some calibrated slots (a'"), (b''') in wall of the piston (162), the little pistons (163), (164) being controlled or not by springs (166), (167), (168), placed diaphragm(165)andthebetweenthe bottom piston(164)andbetweenthethe interior of the piston (162) and the faces of the two little pistons (163), (164), between which a pressurized gas may be introduced or not, the strokes of the little pistons (163), (164) may be limited to the interior by the bumper (170), placed on the diaphragm (165) and to the exterior by bumpers (169), (171) placed on the inner sides of the piston (162), the system sensibility depending on the pressure of the gas between little pistons, the elasticity of the springs (166), (167), (168) and on the number, surface and form of the slots (z") on the diaphragm (165) and of the exterior ones (a'''), (b) on the sides of the piston (162). |
| 13. | Automotive selfadjustable damper with selfcorrecting dissipative characteristic according to claims 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18 and 19, characterized by the fact that for assuring the thcrma ! stability, round the inner cylinder (172) at the level of one or several slots (c''') in inner cylinder (172), there are located one or several ringsisegments (173), made from a material having a thermal expansion coefficient smaller then the one of the material the inner (172) cylinder is made from, so that when increasing the temperature the clearance between the inner cylinder (172) and the ring/s should decrease and thus to increase necessaryfortheliquidpassingthroughthis/theseslot/s,pressure compensating the decrease of the hydraulic efficiency generated by the increase of the clearance between piston and the innen cylioder and the decrease of the oil viscosity. |
| 14. | Automotive selfadjustable damper with selfcorrecting dissipativc characteristic according to claims 1, 2,3,4,5,6,7,8,9,10,11,12,13, and 20, characterized by the fact that for assuring the thermal stability one or several slots (d) respectively (e) in the cylinder (174) respectively (177), is obturated controlled by sharp plungcr/s (175) respectively closer/s (178) of a madefrommaterialswiththermalexpansioncoefficientsgratesconvenientform than n the material the inner cyclinder is made from, fixed on the outer cylinder (176), respectivefy (179), reducing thus the play between the plunger/s and closer/s and inner cylinder (174) respectively (177) generating the increase of the pressure necessary tor the passing of the working liquid through these valves and thus thedecreaseofthehydraulicefficiencygeneratedbythecompensatingthus possible increase of the play between piston and the inner cylinder and the decrease oilviscozity.the. |
| 15. | damperwithselfcorrectingdissipativeselfadjustable characteristic according to daims 1,2, 3,4,5,6,7,8,9,10,11,12,13, 14 and 15, thefactthatithasapiston(183),aninnercylinder(180),acharacterizedby superior block (181), an inferior block (182) equipped with checking valves (187), (188), (184), (185), (186) with the possibility of modifying the dissipation characteristic in real time, the control of the valve check being permanently, discretely, or in step made, by controlling the relative position of the obttlrating elements of the liquid discharging holes/slots, or by controlling the pressing forces of the valve plates, or by controlling the sizes of the calibrated holes/slots, being achieved mechanically, hydraulically, pneumatically, electrically, or clectromagnetically, or by a combination of them, allowing the achieving of a semiactive damper, the inner cylinder (180), the superior block (181) and the inferior block (182), having filling valves (189), (190), (191) which can be reduced to two, one filling compression valve in the superior area and one filling rebound valve in the inferior area and with the checking valve (185) placed in the superior block (181) and/or ckecking valve (186) in the inferior block (182) may bemissing. selfadjustabledamperwithselfcorrectingdissipative23. |
| 16. | Automotive toclaimscharacteristicaccording 1, 2,3, 7,8,9, 10,11,12,13,14,15,16,17,18,19,20 and 21, characterized by the fact that over the slots (f''') in the inner cylinder (193) are superimposed slots differentformsandsiozesplacedinoneorseveralrings(194),placedround(g''')of the inner cylinder (193), the desired combination being obtained by rotating the exterior ring (194) relative to the inner cylinder (193), which allows the changing oft!iedampingcoefficientinstages. |
| 17. | Automotive senadjustable damper with selfcorrecting dissipative characteristic according to claims 21,characterizedbythe1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20and fact that over the slots (h'''), in the inner cylinder (195) there are superimposed slots of différent forms and sizes (i'''), applied in one or several outer rings (196), placed concentricaHy with the working cylinder, the degree of superimposing of beingobtainedbyrotatingtheouterring/s,factallowingthepermanenttheslots thedampingcoefficient.changeof. |
| 18. | Automotive selfadjustable damper with selfcorrecting dissipative characteristic claimsto 21,characterizedbythe1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20and tact that the slots (j'''), (k''') in the inner cylinder (197) are obturated progressivelyprogressivelyby rotating ring(198)andwhoseedges(l''')arecutouter according convenientprofilethusobtainingthechangeofthedampinga ofthenumberofobturatedslots.coefficientfunction. |
| 19. | Automotive selfadjustable damper with selfcorrecting dissipative characteristic according to claims 1,...,25, characterized by the fact that for realise the damping characteristic the inner cylinder may be equipped with checking valves, holes/slts po10s material in diverse combinations. |
Description:
INTERNATIONAL SEARCH !------------------- ! Interr nal Application No PCT/RO00/00012 C. (Continuation) DOCUMENTS CONSIDERED TO BE RELEVANT Categorv-Citation of document. with indication, where appropriate, of the relevant passages Relevant to claim No. A"MONROE SENSA-TRAC, UN NOUVEAU CONCEPT" REVUE TECHNIQUE AUTOMOBILE, FR, ETAI. BOULOGNE-BILLANCOURT, vol. 49, no. 567, 1 November 1994 (1994-11-01), page 351 XP000472648 ISSN: 0017-307X A US 2 332 161 A (MC INTYREB D) 19October 1943 (1943-10-19) INTERNATIONAL SEARCH REPORT Interr nal Application No ,.ormation on patent family members PCT/RO 00/00012 Patent document Publication Patent family Publication cited in search report date member (s) date US 2944639 A 12-07-1960 NONE FR 553667 A 29-05-1923 GB 189102 A FR 2479386 A 02-10-1981 GB 2064710 A 17-06-1981 BE 886502 A 04-06-1981 EP 0030455 A 17-06-1981 IT 1146971 B 19-11-1986 JP 56090140 A 22-07-1981 US 2332161 A 19-10-1943 GB 570167 A
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