Table of Contents
Why do we have petrol and diesel?
Petrol and diesel come from crude oil, which comes from deep underground. Crude oil is refined to make petrol (in America this is known as gasoline) or diesel. Most forms of transport use either petrol or diesel to power their engines – from lawnmowers, cars, buses and motorbikes to large ships and aeroplanes.
Why heavy vehicles use diesel as fuel and not petrol?
High torque: Heavy vehicles are used to carry a high load like goods and passengers, hence these vehicles require high torque at low speed. Diesel engines can provide high torque than petrol engines hence diesel engines are preferred for heavy vehicles.
Why do cars not use diesel?
Diesel engines are more expensive to produce than gasoline engines. “Diesel engines are already more expensive to develop than gasoline units, given their turbos and complex injection systems. After-treatment systems make them even pricier.”
What’s the difference between petrol and diesel?
Both petrol and diesel engines are internal combustion engines. The difference between petrol and diesel is found in the way that the combustion occurs. Whilst a petrol engine combines fuel with air before being ignited by spark plugs, in a diesel engine the air is compressed beforehand and then the fuel is injected.
Why petrol is not used in heavy vehicles?
Petrol is highly combustible than Diesel. Petrol gives quick energy compared to Diesel. It is not suitable for heavy vehicles because by burning of petrol it gives lot of energy in a short time. At this circumstances, the vehicles has to move quick but due to heavy load it cannot as a result the cylinder may burst.
What is the difference between petrol and diesel?
How do petrol and diesel engines differ? The difference between petrol and diesel is found in the way that the combustion occurs. Whilst a petrol engine combines fuel with air before being ignited by spark plugs, in a diesel engine the air is compressed beforehand and then the fuel is injected.
Which part is not common between petrol and diesel engine?
Detailed Solution
| Petrol engine | Diesel engine |
|---|---|
| Less vibration, and hence, smooth running. | More vibration, and hence, rough running and noisier. |
| Engine weight is less. | Engine weight is more. |
| It emits carbon monoxide. (CO) | It emits carbon dioxide. (CO2) |
What is wrong with diesel?
Although diesel-engined cars emit more particulates than petrol ones, their CO2 emissions are generally lower. It’s also important to note that older diesels have far higher particulates and CO2 emissions than newer ones and that the European Union has been tightening up on emissions since 1992.