When diesel fuel is ignited, it pushes pistons that are linked to an electric generator. The electricity generated by this process drives motors that are linked to the locomotive’s wheels. During the upward cycles of the stroke, a ″diesel″ internal combustion engine ignites the fuel by utilizing the heat created by the compression of air during the compression cycle.
- 1 Why do diesel locomotives use electric motors?
- 2 What are the disadvantages of diesel-electric traction?
- 3 How does a diesel-electric locomotive start?
- 4 What is a diesel-electric motor?
- 5 Why train engines are not turned off?
- 6 How far can a train go on a gallon of diesel?
- 7 Which is better diesel or electric locomotive?
- 8 Why do trains have two engines?
- 9 Are diesel locomotives more powerful than steam?
- 10 Why does Amtrak change from electric to diesel?
- 11 How much torque does a diesel-electric locomotive have?
- 12 How much horsepower does a diesel locomotive have?
- 13 How do electric locomotives work?
- 14 How efficient is a diesel-electric locomotive?
Why do diesel locomotives use electric motors?
For the purpose of supplying power to the wheels of modern diesel trains, electric motors known as ‘traction motors’ are used. The diesel power plant just provides power to the traction motors; it does not actually spin the wheels on the vehicle.
What are the disadvantages of diesel-electric traction?
- Aspects of Diesel Electric Traction that are disadvantageous The life expectancy of a diesel engine is rather limited.
- Overloading capacity is restricted.
- Diesel engines and motor-generator sets require their own cooling systems, which must be installed separately.
- The operating and maintenance costs are quite expensive.
How does a diesel-electric locomotive start?
What is the operation of a diesel locomotive? When the diesel is ignited, it provides power to the pistons that are connected to an electric generator to generate electricity. The generator then creates energy that is used to power the motors that move the locomotive’s wheels and propel it down the tracks.
What is a diesel-electric motor?
Although they are called diesel locomotives, diesel locomotives really use electricity to propel them ahead. A huge diesel engine moves a shaft, which powers a generator, which generates electrical current. This electrical energy is used to power massive electric motors located at the wheels, which are referred to as ‘traction motors.’
Why train engines are not turned off?
Trains, due to their size and weight, require the highest possible brake line pressure in order to stop efficiently. For obvious reasons, loco pilots never make any concessions when it comes to brake line pressure. Another reason for not shutting off diesel train engines is that the engine itself is quite efficient and reliable.
How far can a train go on a gallon of diesel?
When running on a single gallon of gasoline, CSX trains can transport one ton of freight roughly 492 miles. A more efficient use of fuel results in less greenhouse gas emissions for our environment. (For further information, visit the website of the Association of American Railroads at http://www.aar.org/.)
Which is better diesel or electric locomotive?
In addition, because the capacity of the power plant is significantly bigger than the capacity of any one locomotive, electric locomotives may have a higher power output than diesel locomotives, and they can create even more short-term surge power for rapid acceleration. When it comes to commuter train service with frequent stops, electric locomotives are the best option.
Why do trains have two engines?
The Quick and Dirty Answer. Trains are equipped with many engines in order to give extra pulling power. Each locomotive has a specific amount of pulling power (also known as ″tractive effort″) that is proportional to the number of horsepower that the diesel engine in the locomotive has to offer.
Are diesel locomotives more powerful than steam?
Because diesel engines have such high thermal efficiency (modern diesel engines achieve 45 percent efficiency compared to a steam engine’s 10% efficiency), they can travel longer distance between refueling stops than other types of engines. This allows them to travel longer distances between refueling stops.
Why does Amtrak change from electric to diesel?
Because Amtrak’s trains travel through areas of the United States where there are no overhead electrical wires, the trains will be powered by diesel engines.
How much torque does a diesel-electric locomotive have?
It is necessary to position each motor transversely between a pair of driving wheels. The electric motors on an Evolution will produce a combined total of roughly 60,000 pound-feet of torque at start-up, which is the equivalent of around 120 Ferrari Enzos. This will result in a zero-to-60 time of just shy of 45 seconds when the car is not loaded.
How much horsepower does a diesel locomotive have?
To operate, all diesel locomotives must maintain a constant connection between their engines and an electric generator (either a DC or AC). This is accomplished by converting the power generated by the engine into a large quantity of current, which allows the locomotive to function at a typical speed of 3000-5000 hp.
How do electric locomotives work?
Powered by the overhead equipment (OHE), the electric locomotive collects electricity from it with the aid of a Pantograph and transforms it to mechanical energy in a regulated manner using Traction Motors, which drive the axles.
How efficient is a diesel-electric locomotive?
Although trains are more effective than vehicles in terms of fuel efficiency, not all trains are created equal. In comparison, diesel-powered trains transport around 30-35 percent of the energy generated by combustion to the wheels, whereas trains that get electricity directly from an overhead powerline transfer approximately 95 percent of the energy generated by combustion.