The FIAT high speed bogie

The Production Workshops

The Technology ....

Initially original speed of ICF coach was 96 kmph since secondary suspension was laminated spring. The design was modified to all coil bogies with longer suspension hanger and weight transfer through side bearers, thereby enabling speed potential to 105 kmph on mainline coaches and gradually enhanced to 140 kmph for Shatabdi, Rajadhani and Janshatabdi coaches .Initial coaches manufactured were with Vacuum brake and later modified into twin pipe graduated release air brake system – under frame mounted. 

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The WDG4 & WDP4 series of DLW make locomotives are GM (General Motor) locomotives. The GM locomotive models are GT46 MAC for goods service and GT46 PAC for passengers service. The GM locomotive is fitted with engine model no. 710G3B. The GM locomotive is equipped with a microprocessor based computer control system- referred to as EM- 2000 locomotive. The computer  controlled system is equipped with a diagnostic display system (DDS) in the cab to provide an interface between the locomotive driver and the computer. The EM- 2000 computer is programmed to monitor and control locomotive traction power, record and indicate faults, and allow diagnostic testing.

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The FIAT Bogie is of EUROFIMA design.  Bogie frame is a Y frame fabricated and machined structure.  Four nested springs for primary suspension and two nested flexi-coil springs for secondary suspension.  Axle mounted disc brake system.  Hydraulic shock absorbers used conforming to UIC stipulation. Each FIAT Bogie has 4 primary vertical, 2 secondary vertical, 1 secondary lateral and 2 yaw dampers.

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Railway wagons are unpowered railway vehicles that are used for the carriage of goods. A variety of wagon types are in use to handle different types of goods, but all goods wagons in a regional network typically have standardized couplers and other fittings, such as hoses for air brakes, allowing different wagon types to be assembled into trains. Wagon, covered – Wagon of a watertight nature by virtue of the construction of the vehicle (completely covered on roof and sides), also characterized by the security of transport (possibility of locking and/or sealing the wagon). Wagon, open – Wagon not fitted with a roof. It may be either high sided, low sided or without side. 

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EMU is the main mode of travel in suburban cities like Mumbai which has a limited space and spread in a linear manner from south to north upto 120 Km unlike other cities in India where the geographical spread is more uniform. Further Mumbai is a land locked city surrounded by sea on many sides. Electric suburban trains were introduced in Mumbai on 3rd February 1925 with1500V Direct Current (DC) traction system. DC to AC conversion has been completed on Central as well as Western Railway

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WAP 1 (Designed by Chittaranjan locomotive works in 1980 for the Kolkata-Delhi Rajdhani Express. A very successful class. 3900 hp). WAP 2 (Decommissioned in the late 1980s. Similar to WAM2 & 3. 4 built. Also had Flexicoil Mark -ll bogies. 2910 hp. Only 4 units built). WAP 3 (Rebuilt to WAP-1. Similar to WAP-1. Approximated speed of 160 kmph restricted to 145 kmph. 5 Built since 1987.). WAP 4 (Upgraded from WAP 1 for higher loads by Chittaranjan locomotive works in 1994. One of the most successful locomotives in India. Very powerful class. 5350 hp) WAP 5 (Imported in 1995 from Switzerland and used on premier express trains. 5450 hp)

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Types of Bogies used on Indian Railways

The FIAT High Speed Bogie

The FIAT Bogie is an adoption of EUROFIMA design.  Bogie frame is a Y frame fabricated and machined structure.  4 nested springs for primary suspension and 2 nested flexi-coil springs for secondary suspension.  Axle mounted disc brake system.  Hydraulic shock absorbers . It  has 4 primary vertical,2 secondary vertical, 1 secondary lateral and 2 yaw dampers.

The HTSC Bogie

The HTSC (high traction/speed-three axle) bogie assembly support the weight of the locomotive and transmits  power to the rails. The HTSC truck is used on  freight service, while the HTSC-B1 is used on passenger service. There are minor differences in specifications between the two types of bogie, however the basic design is similar. It is a sturdy and maintenance free design.

Electric Locomotive Bogies

Multifarious Electric locomotive bogies are present in the Indian Railways due to the various locomotive variants coexisting. There are the traditional electric locomotives and also the state of art three phase which have the  static converters and inverts along with 3 phase electronics circuitry. Some GTO based locomotives are also in service. 

The ICF Bogie of traditional passenger coaches

 Initially original speed of ICF coach was 96 kmph since secondary suspension was laminated spring. The design was modified to all coil bogies with longer suspension hanger and weight transfer through side bearers, thereby enabling speed potential to 105 kmph on mainline coaches and gradually enhanced to 140 kmph for Shatabdi, Rajadhani and Janshatabdi coaches  

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