INTRODUCTION TO DIESEL-ELECTRIC LOCOMOTIVES

Rajesh Kumar Yadav

3rd year, Mechanical SIET,Greater Noida

Uttar Pradesh

By

ABOUT DLW Established in 1961 in collaboration with ALCO/ USA One of the few Integrated Loco Builders in the World In-house manufacture of components and sub-

assemblies Largest builder of ALCO & EMD design locos In the process of switching over to production as per

EMD loco technology Transfer of Technology Contract with EMD/General

Motors for manufacturing of passenger and freight versions of 4000-4500 HP locomotives, including 710 series engine

Manufacture of Diesel Generating sets ISO 9001, ISO 14001 and OHSAS 18001certified

Diesel Electric Locomotive

It consist of the following-

1. Power Source- Diesel Engine

2. Transmission system- Electrical (i.e. Alternator & TM).

3. Control System- Electrical/Electronic.

4. Bogie

The above four system are synchronized with

5. Structures - U/F.ASM

6. Super Structure- Long Hood ASM & Cab.

Underframe ASM

FUEL TANK (WDG4)

Capacity-6000 Ltrs.

Diesel Electric Locomotive Energy conversion

DIESEL ENGINE Generator Motor

Chemical

Energy

Mechanical

energy

Electrical

energy

Kinetic

energy

Electrical Transmission Mechanical – Electrical - Mechanical

•DC –DC (Pre1960, up to 1985) : DC generator supplying DC traction motors.

•AC - DC (1960-94, 1990s onwards) : AC alternator output rectified to supply DC motors.

•AC – AC (After 1994, 2002 onwards) : AC alternator output rectified to DC and then

inverted to 3-phase AC for the traction motors.

ENGINE

16-710G3B (Turbocharged , Aftercooled , Open Chamber)

NOMENCLATURE 16 710 –G3-B I-09- A - 001

NO. OF CYL.

SWEPT VOLUME

RAIL ROAD UPGRADED

TURBO CHRGED ENG

NEW GENRATION

FUEL ECONOMY

ENGINE

INDIA YEAR MONTH ENG. SL. NO.

TURBO END

ACCESSORY END

Front end Rear end

TRACTION MOTOR

DESIGN Bore = 230.1 mm

Stroke = 279.4 mm

CR = 16:1

PFP = 127.6 bar (1850 psi)

BMEP = 11.23 bar ( 163 psi)

Mean Piston Speed = 8.38 m/sec

Weight 17962 Kg

Weight of Engine + Lube Oil + water}

POWER TRANSMISSION SYSTEM

D E ALTERNATOR CONTROL

SYSTEM

AXLE

TRACTION

MOTOR

WHEEL

BLOCK DIAGRAM

Classification of Indian Locomotives

• In India, locomotives are classified according to their track gauge, motive power, the work they are suited for and their power or model number.

• The class name includes this information about the locomotive.

• It comprises 4 or 5 letters.

• The first letter denotes the track gauge.

• The second letter denotes their motive power (Diesel or Electric).

• The third letter denotes the kind of traffic they are suited for(goods, passenger, mixed or shunting).

• The fourth letter used to denote locomotives' chronological model number.

• However, from 2002 a new classification scheme has been adopted. Under this system, for newer diesel locomotives, the fourth letter will denote their horsepower range.

• Electric locomotives don't come under this scheme and even all diesel locos aren't covered. For them this letter denotes their model number as usual.

• With the new scheme for classifying diesel locomotives (as mentioned above) the fifth item is a letter that further refines the horsepower indication in 100 hp increments: 'A' for 100 hp, 'B' for 200 hp, 'C' for 300 hp, etc.

• Thus a WDM-3A refers to a 3100 hp loco, while a WDM-3F would be a 3600 hp loco.

Classification of Indian Locomotives

• The first letter (gauge) • W-broad gauge • Y-meter gauge • Z-narrow gauge(2.5 ft) • N-narrow gauge (2 ft)

• The second letter (motive power) • D-Diesel • C-DC electric (can run under DC traction only) • A-AC electric (can run under AC traction only) • CA-Both DC and AC (can run under both AC and DC tractions), 'CA' is considered a single

letter • B-Battery electric locomotive (rare)

• The third letter (job type) • G-goods • P-passenger • M-mixed; both goods and passenger • S-Used for shunting (Also known as switching engines or switchers in United states and

some other countries) • U-Electric multiple units (used as commuters in city suburbs) • R-Railcars

• For example, in "WDM 3A":

• "W" means broad gauge

• "D" means diesel motive power

• "M" means suitable for mixed(for both goods and passenger)service

• "3A" means the locomotive's power is 3,100 hp ('3' stands for 3000 hp, 'A' denotes 100 hp more)

• Or, in "WAP 5":

• "W" means broad gauge

• "A" mean AC electric traction motive power

• "P" means suitable for Passenger service

• "5" denotes that this locomotive is chronologically the fifth electric locomotive model used by the railways for passenger service.