US3701397A - Roll dampening - Google Patents

Roll dampening Download PDF

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Publication number
US3701397A
US3701397A US81322A US3701397DA US3701397A US 3701397 A US3701397 A US 3701397A US 81322 A US81322 A US 81322A US 3701397D A US3701397D A US 3701397DA US 3701397 A US3701397 A US 3701397A
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US
United States
Prior art keywords
car body
supply
lateral acceleration
air
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US81322A
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English (en)
Inventor
Yasuhior Shirane
Junzo Yamada
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Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
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Filing date
Publication date
Application filed by Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
    • B61F5/22—Guiding of the vehicle underframes with respect to the bogies
    • B61F5/24—Means for damping or minimising the canting, skewing, pitching, or plunging movements of the underframes

Definitions

  • PATENTEDnma I972 3,701 397 SHEET 2 0F 4 I CENTRIFUGAL ACCELERATION CONTROL ELEMENT LQ EA A EL ATION 1 SAAB TEA EEA l FLOOR [BODY FLOOR DETECTOR FEED BACK ELEMENT CENTRIFUGAL ACCELERATION CONTROL ELEMENT ⁇ Assam.
  • ROLL DAMPENING This invention relates to a method of controlling car body rolls by adjusting the levels of air springs on the right and left of a car body so that no unpleasant lateral acceleration may be felt by passengers when the rolling I stock runs on a curved track.
  • FIG. 1 is a schematicview of a cross-sectional elevation of a conventional rolling stock
  • FIG. 2A is a block diagram showing a conventional automatic roll control system
  • FIG. 2B is a block diagram of a conventional car body roll controlling apparatus
  • FIG. 3 is a diagram showing the operation of a supply and exhaust valve with the variation of the lateral acceleration parallel with the car body floor of the same
  • FIG. 4A is a block diagram showing an automatic roll control system using the control element in accordance with the present invention
  • FIG. 4B is a block diagram of a car body roll controlling apparatus in a embodiment of the present invention.
  • FIG. 5 is a diagram showing a coefficient of discharge with the variation of the lateral acceleration parallel with the car body floor in the same embodiment
  • FIG. 6 is a diagram showing the relation between the lateral acceleration parallel with the car body floor and the operation of the supply and exhaust valve of the car body roll controlling apparatus.
  • two right and left air springs 1 and 1' are provided in the bottom part B of a rolling stock H and are connected to an axle A of wheels W through a supporting means S.
  • electromagnetic air supply valves 2 and 2' are provided between the right and left air springs 1 and 1 and an air reservoir 6 and electromagnetic air supply valves 3 and 3' are provided between said air springs and the atmosphere so that, when the lateral acceleration parallel with the car body floor exceeds a fixed valve Bd, the electromagnetic air supply valve 2 on one side and the electromagnetic air exhaust valve 3' on the other side may be operated or, when it exceeds -Bd, the electromagnetic air supply valve 2' and the electromagnetic air exhaust valve 3 may be operated to roll the car body in a direction in which the acceleration parallel with the car body floor is canceled.
  • the amount of the air flow rate per unit time is adjusted with the effective orifice diameter of the electromagnetic valve or separately provided throttling orifices 4, 4', 5 and 5'.
  • the orifice diameter is so important to the control and the moment of inertia of the car body or the time lag of the control is so closely related with it that, if the orifice diameter is small to ob tain a small coefficient of discharge, the objective control at the time of a high speed is insufficient to reduce the lateral acceleration parallel with the car body floor.
  • the orifice diameter is made large to obtain a large coefficient of discharge, when the lateral acceleration parallel with the car body floor is small, for example, when passing on a curved track at a low speed, an over control is caused and a reverse control for reversely pulling back the car body is made, this is repeated, a socalled hunting phenomenon is likely to occur and the car body becomes unstable. Further, on a curved track or the like, the radius of curvature, cant and running velocity are so variable that it is impossible to satisfy the conditions in any case.
  • a lateral acceleration 11. parallel with the track level plane acts and, when the orifice diameter is small, as shown in II, FIG. 6, the lateral acceleration 6 parallel with the car body floor remains so that the proper control has not been effected.
  • B is continuously zero.
  • 7 represents a supply or exhaust signal for the air spring on the right side. Those above the center line are supply signals.
  • the orifice diameter is large, as shown in III, FIG. 6, an over control is caused and so-called hunting state, in which a useless supply and exhaust are repeated, is made.
  • FIG. 2A shows, in block diagram, the arrangement of the car body floor with the conventional control element of FIG. 3.
  • FIG. 4 shows an example of a control with three-row three-step electromagnetic valves.
  • Electro magnetic air supply valves 2 2, and 2 are provided in parallel between an air spring 1 and an air reservoir 6 and electromagnetic air supply valves 2' .2, and 2', are provided in parallel between an air spring 1' and the airreservoir 6.
  • Electromagnetic air exhaust valves 3,, 3, and 3 are provided between the air spring 1 and the atmosphere and electromagnetic air supply 3' 3', and 3'; are provided between the air spring 1'. and the atmosphere.
  • These electromagnetic air supply and exhaust valves have such effective orifice diameters as can not be well controlled at the time of a high speed of the rolling stock with a single row or are throttled with i 1, s, s '1, '2 's, n 5. s '1 's and so as not to be controllable enough at the time of a high speed with a single row.
  • the dead zones of the quantity of the lateral acceleration parallel with the car body floor for the respective electromagnetic valve shall be I fld, I I fid, I I Bd I
  • a lateral acceleration parallel with the car body floor and larger than I [3d,l but smaller than I pd, l is applied, a single row of the supply and exhaust valves 2, and 3', or 3, and 2, is operated.
  • a lateral acceleration parallel with the car body floor and larger than I Bd l but smaller than I Bd I is applied, two rows of the supply and exhaust valves 2,, 2,, 3' and 3', or 3 3 2, and 2' are operated.
  • three rows of the supply and exhaust valves are operated.
  • any number of parallel rows of the supply and exhaust valves are operated to control the car body. Therefore, when the lateral acceleration parallel with the car body floor is small, air is supplied or exhausted so that no hunting will result. When such large control as at the time of a high speed is required, sufficient air is supplied and exhausted and a stable control high in the controllability can be made.
  • FIG. 4 shows, in block diagram, the arrangement of the car body floor with the control element of the present invention depicted in FIG. 5.
  • present invention The result of making a two-row and two-step control by embodying the present invention is shown in IV in FIG. 6. When this result is compared with that of the conventional method, the superiority in the controllability can be made.
  • FIG. 4 shows, in block diagram, the arrangement of the car body floor with the control element of th present invention depicted in FIG. 5.
  • the lateral accelerations parallel with the car body floor 3d,, 8d,, Bd may be at irregular spacings.
  • the respective orifice diameters may not be the same but may be different in consideration of the air reservoir, air springs and pressure difference from the atmosphere.
  • the car body roll is controlled by using a plurality of rows and steps of electromagnetic air supply and exhaust valves. Any number of rows and steps of air supplying and exhausting electromagnetic valves can be operated in response to the magnitude of the lateral acceleration acting parallel with the car body floor and therefore a proper control can be always made without causing hunting or the like.
  • the terms rows and steps referred to throughout the specification indicate a sequential operation for the supply and exhaust valve means.
  • a method of controlling roll dampening in a car for reducing lateral acceleration felt by passengers while the car body is travelling on a curved track by supplying and exhausting the air spring means to adjust the levels of the right and left air springs comprising arranging a plurality of supply and exhaust valve means which are sequentially operated between the air springs and an air reservoir and between the air springs and the atmosphere and an ON-OFF means, controlling the coefficients of the discharge rate of said supply and exhaust means so that, when the degree of the lateral acceleration applied parallel with the car body is small, said coefficients of discharge rate may be small but, when the degree of lateral acceleration is large, said coefficients of discharge rate may be large and a sufficient controllability may be effected to prevent hunting of the bogie.
  • a car body roll controlling method according to claim 1 wherein an electromagnetic valve is used for the valve means.
  • a car body roll controlling method wherein the said supply and exhaust valve means operate at a lateral acceleration parallel with the car body floor firstly of from 0.005 to 0.0l5g., secondly of from 0.01 to 0.03g., thirdly of from 0.015 to 0.03g., and fourthly of from 0.02 to 0.06g.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Metal Rolling (AREA)
US81322A 1969-10-18 1970-10-16 Roll dampening Expired - Lifetime US3701397A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8351669A JPS48205B1 (cs) 1969-10-18 1969-10-18

Publications (1)

Publication Number Publication Date
US3701397A true US3701397A (en) 1972-10-31

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ID=13804633

Family Applications (1)

Application Number Title Priority Date Filing Date
US81322A Expired - Lifetime US3701397A (en) 1969-10-18 1970-10-16 Roll dampening

Country Status (9)

Country Link
US (1) US3701397A (cs)
JP (1) JPS48205B1 (cs)
CH (1) CH527082A (cs)
DE (1) DE2051272C3 (cs)
ES (1) ES384659A1 (cs)
FR (1) FR2066189A5 (cs)
GB (1) GB1324118A (cs)
SE (1) SE367366B (cs)
ZA (1) ZA707050B (cs)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918369A (en) * 1972-05-12 1975-11-11 Sumitomo Metal Ind Roll stabilized pneumatically sprung railway car
US4091738A (en) * 1976-02-18 1978-05-30 Rockwell International Corporation Stabilized fluid railway car suspension
US4185719A (en) * 1976-04-23 1980-01-29 Halliburton Company Truck damping
US4693185A (en) * 1986-02-21 1987-09-15 Dofasco Inc. Control systems for vehicle fluid suspension systems
US5170716A (en) * 1988-06-24 1992-12-15 Anf-Industrie Device for applying a force to the underframe of a railway vehicle, for the inclination of the underframe or the transverse stabilization of the vehicle
US5636576A (en) * 1995-11-07 1997-06-10 Construcciones Y Auxiliar De Ferrocarriles, S.A. Tilting system for railway rolling stock
US6550394B1 (en) * 2002-03-11 2003-04-22 Buckeye Steel Castings Company Retractable auxiliary bumper for hydraulic or pneumatic railway suspensions

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2952182C2 (de) * 1979-12-22 1983-02-03 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Drehgestell für ein Schienenfahrzeug
FR2574036A1 (fr) * 1984-12-03 1986-06-06 Anf Ind Procede et systeme d'amortissement des mouvements parasites des vehicules ferroviaires
DE3935324A1 (de) * 1989-10-24 1990-05-31 Quaas Hans Rainer Dipl Ing Neigbarer wagenkasten fuer fahrweg- und schienengebundene fahrzeuge von verkehrssystemen
US5291835A (en) * 1993-03-25 1994-03-08 Railrunner Systems, Inc. Retractable intermodal vehicle
US6050197A (en) * 1998-02-04 2000-04-18 Railrunner Systems, Inc. Intermodal vehicle for forming a train of highway trailers
JP3391274B2 (ja) * 1998-09-11 2003-03-31 住友金属工業株式会社 鉄道車両における空気ばねによる車体傾斜制御時の給排気方法
DE10116882A1 (de) * 2001-04-04 2002-10-17 Bombardier Transp Gmbh Verfahren zur Steuerung des Neigungswinkels eines Wagenkastens gegenüber einem Fahrwerk eines Fahrzeugs und Fahrzeug zur Ausübung des Verfahrens
JP4594743B2 (ja) * 2005-01-14 2010-12-08 株式会社東芝 空気バネ式車体傾斜システムにおける電磁弁制御方法
JP5513175B2 (ja) * 2010-03-05 2014-06-04 川崎重工業株式会社 鉄道車両の車体傾斜装置

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918369A (en) * 1972-05-12 1975-11-11 Sumitomo Metal Ind Roll stabilized pneumatically sprung railway car
US4091738A (en) * 1976-02-18 1978-05-30 Rockwell International Corporation Stabilized fluid railway car suspension
US4185719A (en) * 1976-04-23 1980-01-29 Halliburton Company Truck damping
US4693185A (en) * 1986-02-21 1987-09-15 Dofasco Inc. Control systems for vehicle fluid suspension systems
US5170716A (en) * 1988-06-24 1992-12-15 Anf-Industrie Device for applying a force to the underframe of a railway vehicle, for the inclination of the underframe or the transverse stabilization of the vehicle
US5636576A (en) * 1995-11-07 1997-06-10 Construcciones Y Auxiliar De Ferrocarriles, S.A. Tilting system for railway rolling stock
US6550394B1 (en) * 2002-03-11 2003-04-22 Buckeye Steel Castings Company Retractable auxiliary bumper for hydraulic or pneumatic railway suspensions

Also Published As

Publication number Publication date
DE2051272A1 (de) 1972-04-27
CH527082A (de) 1972-08-31
DE2051272C3 (de) 1980-07-10
JPS48205B1 (cs) 1973-01-06
GB1324118A (en) 1973-07-18
DE2051272B2 (de) 1979-10-18
FR2066189A5 (cs) 1971-08-06
ZA707050B (en) 1971-07-28
SE367366B (cs) 1974-05-27
ES384659A1 (es) 1973-03-16

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