1. Module 4: Railway Equipment
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Module 4: Railway Equipment
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2. Objectives Recognize various types of rolling stock
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Recognize various types of rolling stock
Learn about major vehicle systems
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3. Rolling Stock Locomotives Rail Cars Self-Propelled Rail Cars
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Locomotives
Rail Cars
Passenger Coaches
Freight Cars
Self-Propelled Rail Cars
Mainline
Rapid Transit/Light Rail
Rail Maintenance Equipment (Module 10)
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4. Rolling Stock: Locomotives Introduction
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Used to haul freight, passenger cars, or other rail equipment
Heavy equipment used to haul large loads
A number of standard designs exist to handle wide variety of tasks (freight, high speed, yard switching)
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5. Rolling Stock: Locomotives Basic Types
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Diesel Electric DC AC
Hybrids
Electric
Single System
Multi-System
Other
Diesel Mechanical
Diesel Hydraulic
Electro-Diesel
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6. Rolling Stock: Rail Cars Passenger Coaches – Introduction
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Pulled/pushed by locomotives
Vary in capacity according to application
Low system complexity
A number of standard designs available for different applications
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7. Rolling Stock: Rail Cars Passenger Coaches – Basic Types
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Types
Single Level
Double Deck
Gallery
Custom
Service Application
Commuter Rail
Intercity
High Speed
Cab Car
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8. Rolling Stock: Rail Cars Freight Cars – Introduction
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BOX CAR
Pulled by locomotives
Vary in capacity according to application
Typically only equipped with friction brake equipment
A number of standard designs available for different applications
AUTO RACK CAR
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9. Rolling Stock: Rail Cars Freight Cars –Basic Types
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HOPPER CAR
Box Car
Tank Car
Hopper
Flatbed
Gondola
Intermodal
Specialized (livestock, car carrier, refrigerated, etc.)
DOUBLE STACK CONTAINER CAR
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10. Rolling Stock: Self-Propelled Rail Cars Mainline – Introduction
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Each rail car is fitted with its own propulsion system (Diesel or Electric)
Good performance characteristics (acceleration/deceleration/economy)
Moderate to high systems complexity
Variety of types exist (low speed/short haul to high speed/long haul, single/double deck)
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11. Rolling Stock: Self Propelled Rail Cars Mainline – Basic Types
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Passenger EMU
Catenary
Third Rail
Single/Multi System
Passenger DMU
Diesel Mechanical
Diesel Hydraulic
Diesel Electric
Hybrid Designs
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12. Rolling Stock: Self Propelled Rail Cars Rapid Transit/Light Rail – Introduction
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Used in urban transit applications (subway, streetcar, metro) on dedicated right of way
Lightweight design that is not FRA compliant
Moderate to high systems complexity
Mostly custom built to fit specific performance/ infrastructure requirements
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13. Rolling Stock: Self Propelled Rail Cars Rapid Transit/Light Rail – Basic Types
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Rapid Transit/Heavy Rail
Catenary
Third Rail
Light Rail/Street Car
Hybrid Designs
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14. Vehicle Systems Carshell/Underframe Trucks Friction Brakes
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Carshell/Underframe
Trucks
Friction Brakes
Couplers/Drawbars
Propulsion
Sanding System
Other (Passenger Rail)
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15. Vehicle Systems: Carshell / Underframe Introduction
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Structural backbone of railcars/ locomotives
Different design approaches used, based on application
Design driven by load capacity and safety requirements
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16. Vehicle Systems: Carshell/Underframe Underframe Construction
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Vehicle Systems: Carshell/Underframe Underframe Construction
Freight and Passenger Rail Coach
Light Rail/Rapid Transit
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17. Vehicle Systems: Carshell/Underframe Carshell Construction
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Vehicle Systems: Carshell/Underframe Carshell Construction
Welded Steel Beam
Unibody / Extruded Aluminum
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18. Vehicle Systems: Trucks (Bogies) Introduction
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Vehicle Systems: Trucks (Bogies) Introduction
Interface between rail and vehicle
Different designs types exist, based on application
Design driven by load capacity and speed requirements
Two main categories are standard trucks and powered trucks
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19. Vehicle Systems: Trucks & Truck Components
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Locomotive / Powered Rail Car Truck
Freight / Passenger Coach Rail Car Truck
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20. Vehicle Systems: Trucks Wheels
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Railway wheels today are constructed of either cast or forged steel. The axles are also a forging and are machined to a finish surface to reduce fatigue related stresses from constant reversal of related tensile/compressive loading as the axle revolves. The wheels are force fit onto the axle.
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21. Vehicle Systems: Trucks Wheel/Rail Interface
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Wheel/rail interface is an important parameter for ensuring good vehicle performance
Improper matching of wheel and track profiles can cause maintenance and safety issues
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22. Vehicle Systems: Trucks Wheel/Rail Interface
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For freight rail in North America, wheel profiles are defined by the AAR.
For transit and light rail, vehicle wheels profile and other parameters must be selected to match the track
Proper definition of wear limits and track parameter tolerances are critical
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23. Vehicle Systems: Friction Brakes Introduction
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All types of rail cars are equipped with friction brakes
Main categories are tread and disc brakes
Typically applied by air. Hydraulic, spring, and electric applied brakes are also used.
Control methods include Air, E-P, and ECP
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24. Vehicle Systems: Friction Brakes Brake Control
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Air Brake Control
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25. Vehicle Systems: Coupler / Drawbar Introduction
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Used to join cars together to form a train
Designs very greatly based on load and performance requirements
Detachable or semi-permanent types are used, depending on requirements
NOTE: The coupler shown in the bottom picture is the standard coupler used by the freight railroading industry in North America.
STANDARD COUPLER USED BY FREIGHT RR IN NORTH AMERICA
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26. Vehicle Systems: Propulsion Introduction
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Used in locomotives and self-propelled rail cars
System consists of motors and controls
Propulsion used to accelerate and decelerate rail cars
Main types include diesel, diesel-electric, and electric
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27. Vehicle Systems: Propulsion Diesel/Electric
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In a locomotive, or any other type of diesel electric system, the diesel engine turns a generator, which creates electricity
The electricity is delivered to electric motors that power each axle
Variants include AC, DC, and Hybrid
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28. Vehicle Systems: Sanding System Introduction
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Used in locomotives and self-propelled rail cars
System consists of sand boxes and nozzles at the lead end wheels
The system pours sand at the wheel/rail interface when required to increase traction for acceleration and braking
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29. Vehicle Systems: Other Introduction
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Passenger rail cars are equipped with a number of systems geared towards passenger comfort and safety
Systems include:
Doors
HVAC
Communications
Auxiliary Power
Train Control
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30. Questions? Authors: Marcin Taraszkiewicz, P.E.
4/16/2017
Authors:
Marcin Taraszkiewicz, P.E.
CH2M Hill, Inc.  (312)
Dallas R. Richards, P.E.
Arcadis, inc.  (703)
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31. REVISION HISTORY
4/16/2017
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