Table of Contents
- 1 Why do diesel engines create more power than a gasoline engine of the same size?
- 2 What is the greatest disadvantage of using a diesel engine?
- 3 Why diesel engine has more power?
- 4 Why is a diesel engine more fuel efficient and able to make more power in the low rpm range compared to a gasoline engine?
- 5 What causes hard starting engine?
- 6 Why do diesels start hard when cold?
Why do diesel engines create more power than a gasoline engine of the same size?
In a diesel engine, stroke length (2 or 4) and cylinder pressure are the main factors that increase torque. Their lean air-to-fuel ratio also helps diesel fuel go longer and add extra torque. Diesel fuel also has more energy per gallon than gasoline, which makes diesel fuel more efficient for combustion and torque.
What is the greatest disadvantage of using a diesel engine?
The major disadvantage associated with a diesel powered vehicle is the upfront cost. While it’s true that diesel engines do get better MPG than gas powered engines, this is offset because diesel cars are more expensive than their gasoline powered counterparts.
What is the problem of hard starting in diesel engine?
It’s the middle of summer and your diesel engine is having trouble getting started. The problems that can occur due to the cold weather are well-known and fairly common, such as using summer-grade fuel in winter, a bad glow plug system, slow cranking, or thick, cold oil.
Why is there such a big difference in the horsepower produced by engines with similar displacements?
If two engines offer the same boost and displacement, how can one produce more power than the other one? It depends on how much air you can get into the cylinders of the engine. With more air, you get more oxygen which lets you inject more fuel to create more power. Air is the deciding factor.
Why diesel engine has more power?
Diesels are built to handle turbos. Add more air, and you make more power. The same holds for a gas engine, but they aren’t turbocharged as often. Finally, diesel fuel itself packs more energy density than gasoline.
Why is a diesel engine more fuel efficient and able to make more power in the low rpm range compared to a gasoline engine?
A diesel engine is about 20\% more thermal efficient than a gas engine. They are also used because of their reliability — a diesel engine runs at a much slower RPM (revolutions per minute) than a gas engine, therefore there is less wear and tear and the life cycle of the engine is longer.
What are the pros and cons of a diesel engine?
The Pros and Cons of Diesel Engines
- PRO: Diesels get great mileage.
- CON: Although diesel fuel used to be cheaper than gasoline, it now often costs the same amount or more.
- PRO: Diesel fuel is one of the most efficient and energy dense fuels available today.
What are the pros and cons of a diesel vehicle?
Diesel Cars: 5 Pros & 5 Cons
- 1 Con: Dangerous Emissions. On the downside, these emissions are not fully contained.
- 2 Pro: Less Carbon Emissions.
- 3 Con: Loud And Rough.
- 4 Pro: Improved Noise Level.
- 5 Con: Decreased Horsepower.
- 6 Pro: Increased Torque.
- 7 Con: Regular Maintenance.
- 8 Pro: No Ignition Tuneups.
What causes hard starting engine?
Fouled Plugs: Spark plugs create the spark which allows the vehicle to burn fuel. Fouled plugs are one of the most common reasons for a hard starting engine. This can lead to prolonged cranking before the engine will start. Clogged Fuel Filter: A fuel filter that is clogged can make a vehicle very difficult to start.
Why do diesels start hard when cold?
Metal cylinder walls become very cold when the temperature drops, so most vehicles are harder to start in cold weather. Because diesel engines require much higher temperatures to fire the fuel, they’ve always been harder to start in cold weather than gasoline-powered vehicles.
Why do some engines make more power than others?
Engines make power by moving air through them. A smaller engine can move more air than a larger one by having better flowing heads, turbochargers or revving much higher or any combination thereof. The more air you can move through an engine matched with proper fuel, the more power you’ll make.
Do bigger engines have more torque?
Think about one piston in a gasoline engine. The amount of pressure that the ignited fuel applies to the face of the piston. The distance the piston travels on each stroke (therefore the diameter of the crankshaft). The bigger the diameter of the crankshaft, the bigger the lever arm and therefore the more torque.