US1960481A - Regulation of brakes - Google Patents

Regulation of brakes Download PDF

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Publication number
US1960481A
US1960481A US464065A US46406530A US1960481A US 1960481 A US1960481 A US 1960481A US 464065 A US464065 A US 464065A US 46406530 A US46406530 A US 46406530A US 1960481 A US1960481 A US 1960481A
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US
United States
Prior art keywords
intermediate chamber
chamber
rod
communication
conduit
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
US464065A
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English (en)
Inventor
Monge Gerard De
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Industrie Magneti Marelli SRL
Marelli Europe SpA
Original Assignee
Magneti Marelli SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Magneti Marelli SpA filed Critical Magneti Marelli SpA
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Publication of US1960481A publication Critical patent/US1960481A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/241—Differential pressure systems
    • B60T13/246—The control valve is provided apart from the servomotor cylinder
    • B60T13/247—Mechanical command of the control valve, mechanical transmission to the brakes

Definitions

  • the invention relates to mechanism for regulating the degree of vacuum existing in a power chamber and created by the suction in the supply pipe of an internal combustion engine.
  • Such vacuum is produced in a power chamber by controlling a gaseous medium passing through an intermediate chamber which communicates with the power chamber; and by means of suitable connections, the effect of this vacuum can.
  • the intermediate chamber In view of the fact that the invention obtains maximum braking by establishing communication between the intermediate chamber andthe intake manifold of the motor, the size of the passage for the admission of the air to the intermediate chamber is necessarily very slight.
  • This small inlet has the advantage of increasing the rapidity of establishing the vacuum the power chamber and limiting, the air current which passes through the intermediate chamber, so that the latter causes practically no changes in the condition of carburetion during the braking.
  • a further object of this invention is to provide apparatus which. includes means for forming an intermediate chamber having communication with the atmosphere and a connection to the supply pipe of an internal combustion engine and containing a valve and a passage cooperating therewith of such relative shape that the degree of vacuum in the intermediate chamber produced by the connection to the intake manifold of the engine is approximately proportional to the extent of movement of the valve.
  • Another object of the invention is to provide mechanism for regulating the vacuum in a power chamber and comprising means for forming an intermediate chamber having connections as above'set forth and movably mounted in operative position.
  • the invention also provides that communication between the intermediate chamber and the suction manifold is established in such manner that the vacuum in the power chamber is proportional to the movement of the control member of the brake.
  • Fig. 1 is a. diagrammatic section of the mecha" nism according to this invention:
  • Fig. 2 is a partial section on the line II-II 0! Fig. 1,
  • Fig. 3 is a modification in section of a portion of the mechanism of Fig. 1,
  • Fig. 4 is a section of a further modification
  • Fig. 5 shows diagrammatically a braking system utilizing the mechanism of Fig. 4.
  • the intermediate chamber 311 is adapted to be put into communication, on the one hand, with the open air through the port or passage 5s or constant area and the conduit 2d; and, on the other hand, with the suction manifold 2b of an internal combustion engine through a port 28 and the conduit 20.
  • This intermediate chamber is also in con- 76 stant communication through a conduit 4 with a power chamber 4a.
  • the internal combustion engine whose suction is utilized is the motor of the vehicle to be braked by the apparatus.
  • the passage 5s is formed between a rod 7a and 80 an aperture in a valve 5, subject to the action of a spring '5k which tends constantly to hold said valve on its seat 5g.
  • Grooves such as 5s1, are provided on the inner face of the aperture in the valve 5, to give the effect of baflies or deflectors inthe passage 53.
  • the eddies created in the passage 5s by these grooves have an action equivalent'to that of a reduction in the cross section of said passage.
  • a closure member 6, adapted to move opposite the port 2s and to more or less uncover the latter so as to regulate the area of the communication between the intermediate chamber 3d and the conduit 20.
  • the rod 7a is moved for actuation of the brakes by operating the brake pedal (not shown) of the vehicle and is done in opposition to the action of a spring 5m.
  • the spring 5m abuts against the outside of the atmospheric conduit 2d at one end and against the collar 5a on the rod 7a at the other. Thus the spring is compressed whenever the rod 7a moves the reciprocable valve 6 to open the port or passage 2s.
  • Two collars 7b and 7b1 are also arranged on the rod 7a.
  • the distance which separates these collars- is equal to the movement of rod 7a during operation of the brake, that is to say, from minimum braking (application oi the brake bands to the brake drums) up to the practically maximum braking.
  • the result of this arrange- 10 ment is that on maximum braking the collar lb closes the passage 5s because it has then moved up close to the end of this passage; and the port 2s is now fully uncovered by the valve 6; and that on rapid release the collar 7hr removes the valve 5 from its seat so as to produce free communication between the intermediate chamber 3d and the conduit 2d leading to the atmosphere. This result follows because the rod 7a now moves in the other direction bringing the collar 'Ibi against the other side of the valve 5.
  • the profile or outline of the above mentioned port 28 (see Fig. 2) is such that the vacuum in the intermediate chamber is proportional to the movement of the valve 6.
  • the total course or movement of the valve 6 is 10 mm., the first two of which permit the flow of ,air in the intermediate chamber between the 'conduits 2d and 2c and the last millimeter 01 Y which serves to actuate the collar 72), there remain '1 mm. for progressive operation of the brakes.
  • the device which controls the communication between the intermediate chamber 3d and the conduit 2d terminating in the open air is formed by a cylindrical member 5b aflixed to the drive rod 7a and provided with a circular .flange' 5d and a valve 7d.
  • the circular shutter is formed so as to move in the intermediate chamber 3d during the entire period of braking so as to leave a passage of constant area 58 between the conduit 2d and said intermediate chamber.
  • the valve la is intended to close said communication when it engages a seat 8 during complete braking.
  • the distance separating the valve 7d from the seat 8 is equal to the length of movementof the rod 7a during the entire period of braking, so that on complete release (produced by moving rod 7a in the direction of the arrow X) the flange Sdpasses out of the intermediate chamber andthus allows free entrance of air.
  • the vacuum in the intermediate chamber is regulated in a manner similar to that of the case of Fig. l, by actuation of the closure member 6.
  • the device shown in Figs. 1, 2 and 3 can advantageously be made out of tubing oi! the proper size joined together; or in any other-manner.
  • the controller (an enlarged sectional view of which is shown on Fig. 4) has the form of a hollow casing 8a interposed directly between the brake pedal 15 and the lever 11 of the brake gear through the rods 9a and 9b.
  • This lever 11 is connected rigidly to an arm 11b, connected by cables 110 and 11d to the brake organs proper.
  • the brakes are shown as mounted upon arms or levers 12c and 12d connected to the cables or links 110 or 11d respectively; and while the arm 11b and lever 11 are rigid with respect to each other, there is a common pivot at their point of connection about which these parts turn in unison.
  • Lever 11 is also subject to 1 'the action of a retractile spring lla which tends to move it in a direction opposite that of the arrow Y toward the brake release position.
  • the intermediate chamber 3(11 in the casing 8a communicates with the power chamber 4m It may also be put in communication with the atmosphere through the conduit 2th, and with the motor intake through the conduit 21);.
  • a passage is formed by the annular space left between the flange 5dr and 1 the inner surface of the intermediate chamber.
  • Control of communication between said intermediate chamber and conduit 2hr is effected by means of a valve 61 having an approximately parabolic l'orm. This parabolic form is selected so 1 that the degree of vacuum in the intermediate chamber is approximately proportional to the movement of this valve.
  • valve 7b is pressed to its seat 81 and serves to directly transmit the force exerted on the pedal to the lever 11.
  • the casing So can be made in any suitable manner to provide the chamber 3d1 and the passages which enable this chamber to communicate with the conduits 2b1, 2d and 41; and may comprise several pieces or sections as shown in Fig. 4 suitably united together; or in one piece, if preferred; with couplings and openings to connect .the conduits with the chamber 3d1.
  • Controlling apparatus including means for forming a power motor, means for forming an intermediate chamber connected to the power motor, the intermediate chamber having a conduit for putting the same in communication with the intake manifold of an internal combustion engine, and a second conduit open tothe atmosphere, a slidable rod in said intermediate chamber, said rod having at one end a tapering valve to control communication through the intermediate chamber between the power motor and the first-named conduit, said rod carrying a second valve having a flange to restrict communication between the intermediate chamber and the atmosphere and to cut off said communication, said valves and the interior of said intermediate chamber having such shape that the inflow 01' air to said intermediate chamber from the atmosphere is substantially constant when the valves are moved to open the firstnamed conduit and the amount of air withdrawn from said chamber thru the first-named conduit is proportional to the degree of movement of said valves.
  • Controlling apparatus including means for forming a power motor, movably mounted means for forming an intermediatechamber connected to the power motor, the intermediate chamber having a conduit for putting the same in communication with the i takemanifold of an internal combustion engine, and a second conduit open to the atmosphere, the intermediate chamber also being connected to the power motor, a slidable rod in said intermediate chamber, said rod having at one end a tapering valve to control communication through the intermediate chamber between the power motor and the firstnamed conduit, said rod carrying a second valve having a flange to restrict communication between the intermediate chamber and the atmosphere and to cut off said communication, said valves and the interior of the intermediate chamber being of such shape that the inflow of air to the intermediate chamber is substantially conbrake member to be actuated and connections.
  • Regulating mechanism comprising means for forming a power motor, movably mounted means for forming an intermediate chamber connected to the power chamber, the intermediate chamber having a conduit for putting the same in communication with the intake manifold of an internal combustion engine, and a second conduit open to the atmosphere, a slidable rod in said intermediate chamber, said rod having at one end a tapering valve fixed thereon to control communication through the intermediate chamber between the power motor and the firstnamed conduit said rod carrying a second valve fixed thereon having a flange to restrict communication between the intermediate chamber and the atmosphere and to cut off said communication, one end of said intermediate chamber being shaped to be connected with an actu- 4.
  • Controlling apparatus including means for forming a power motor, means for forming an intermediate chamber connected to the motor, said chamber having a conduit for establishing communication with the intake manifold of an internal combustion engine, and a second conduit open to the atmosphere, a reciprocable rod in said chamber, the rod having a valve fixed thereon at one end to control communication through the chamber between the motor and the first-named conduit, said rod also having a second valve flxed thereon including a flange or collar to control communication between the intermediate chamber and the atmosphere and to cut on said communication, the intermediate chamber having passages of such shape relative to the valves that the inflow of air to said chamber from said atmosphere is substantially constant when the valves are'moved to open the first-named conduit, and the amount GERARD m: MONGE.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Braking Elements And Transmission Devices (AREA)
US464065A 1930-03-01 1930-06-26 Regulation of brakes Expired - Lifetime US1960481A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE357520X 1930-03-01

Publications (1)

Publication Number Publication Date
US1960481A true US1960481A (en) 1934-05-29

Family

ID=3868343

Family Applications (1)

Application Number Title Priority Date Filing Date
US464065A Expired - Lifetime US1960481A (en) 1930-03-01 1930-06-26 Regulation of brakes

Country Status (4)

Country Link
US (1) US1960481A (enrdf_load_stackoverflow)
BE (1) BE368223A (enrdf_load_stackoverflow)
FR (1) FR712246A (enrdf_load_stackoverflow)
GB (1) GB357520A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2784702A (en) * 1955-02-15 1957-03-12 Kelsey Hayes Co Fluid pressure operated motor
US2791203A (en) * 1954-06-28 1957-05-07 Kelsey Hayes Co Fluid pressure operated motor
US2799252A (en) * 1955-03-14 1957-07-16 Kelsey Hayes Co Fluid pressure operated motor
US2862477A (en) * 1956-10-29 1958-12-02 Kelsey Hayes Co Fluid pressure motor valve mechanism
US3194010A (en) * 1962-08-01 1965-07-13 Bailey Controle Servo-mechanism

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2791203A (en) * 1954-06-28 1957-05-07 Kelsey Hayes Co Fluid pressure operated motor
US2784702A (en) * 1955-02-15 1957-03-12 Kelsey Hayes Co Fluid pressure operated motor
US2799252A (en) * 1955-03-14 1957-07-16 Kelsey Hayes Co Fluid pressure operated motor
US2862477A (en) * 1956-10-29 1958-12-02 Kelsey Hayes Co Fluid pressure motor valve mechanism
US3194010A (en) * 1962-08-01 1965-07-13 Bailey Controle Servo-mechanism

Also Published As

Publication number Publication date
BE368223A (enrdf_load_stackoverflow)
FR712246A (fr) 1931-09-28
GB357520A (en) 1931-09-22

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