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A PRESENTATION ON COACH CARE COMPLEX, JAIPUR Submitted toMr. Sulabh NalwayaSubmitted byRavindra

ICF BOGIE Bogie What?It is an independent unit used under a long vehicle, usually mounted on two pairs of wheels (except some special purpose stocks).

Each bogie is provided with a bolster for engagement with its male counterpart provided underneath the vehicle under frame.

The bogie trucks can swivel and adjust its position with case and without restraining the vehicle body while negotiating a curved track.Factors for Designing A BogieSturdy construction to with stand vertical, longitudinal and lateral shocks.

Suitable suspension gear.

Satisfactory damping devices.

Sturdy running gears to give trouble free service.

Easy negotiability on curved track without restraining body structure.Construction of coaching stockShell i.e. the skeleton part.

Furnishing i.e. the provisions of amenities.

Bogie (trolley) with the running gear.

Safety, speed as well as comfort mainly depend on the bogie on which the coach is placed.

Bogie Mounted Brake system for ICF Coaches

Introduction In the under frame mounted brake gear arrangement, there are 51 pin joints per bogie in the system. To reduce the number of pin joints, levers, pull rods and push rods, bogie mounted brake system for mainline coaches have become a viable alternative. Bogie Mounted Brake Cylinders

If the clearance between wheel and the brake blocks is less due to any reason, it does not bring the required clearance automatically.Pawl Housing Ring

The pawl-housing ring is pivoted with the pivot pin of trunion body at one end and the other end of the pawl housing ring moves/turns freely.

A spring-loaded pawl is housed at the free end of the pawl housing. At the bottom of the pawl housing a spring loaded plunger / sleeve is kept between the trunion body and the pawl housing to move the pawl housing upward/outwards during forward strokeComparison Of Important Parameters Between Under Frame And Bogie Mounted System Sr. NoDescriptionU/F Mounted brake System Bogie Mounted brake System1.Slack Adjuster External Internal 2. Type of Slack adjusterDouble Acting Single Acting 3.Capacity of Slack adjuster450 mm 305 mm4. Size brake cylinder 14 Inches 08 Inches 5. Number of Cylinders 02/Coach04/Coach 6.

Type of Brake block Low friction Composite L- Type brake block High friction Composite K- Type Brake block 7. Co-efficient of brake block 0.17 0.25 0.17 0.25 8. Thickness of brake block 60 mm 50 mmAir Brake Cylinder With Slack Adjuster

Components Of Bogie Mounted Brake Cylinder

Adjusting screw with ratchet Adjusting tube Rocker arm Plunger pin Roller plate Pawl housing ring Pawl Piston Turnion body Front cover Piston return spring Cross head Latch Parts Of Bogie Mounted Brake CylinderBrake Power Calculations

Diameter of the cylinder = 20.3cm (8) Area of piston (A)= 323.65 cm2Maximum BC pressure (B) = 3.8 kg/cm2Leverage ratio of levers (C) = 256:134(1.91) No. of levers per axle (D) = 2 No. of brake blocks (N)= 16 Cylinder efficiency (CE) = 0.9 Rigging efficiency (RE) = 0.9 Tare weight of the coach = 37.55 Tones Technical DatasGeneral Working of Bogie Mounted Brake Gear SystemThere is no change in the overall brake system in bogie- mounted arrangement up to the action of distributor valve. Here the system will respond to action on A-9 valve in similar fashion as in the case of standard air brake system. Thank You..