Difference between the petrol engine and diesel engine

The primary difference between Petrol and Diesel engines is that the Petrol engine works on the Otto cycle whereas the Diesel engine works on the Diesel cycle. Other differences can be attributed to the structure, types, and uses of these engines. The main parameter they are classified on is the type of fuel they use. Generally, Engines run on the principle of heat transfer.

Petrol Engine

● Petrol engines are internal combustion engines which have spark-ignition. They run on relatively volatile fuels such as petrol.

● In these engines, air and fuel are generally mixed post-compression.

● Petrol engines work on the Otto cycle, which consists of two isochoric processes and two isentropic processes.

● In petrol engines, air and petrol are usually mixed in a carburettor before being introduced to the cylinder.

● Once the air and petrol are compressed, the fuel is ignited via an electric spark. Difference Between Petrol and Diesel Engine

Diesel Engine

● The Diesel engine is also an internal combustion engine which is also known as the compression-ignition engine. It is named after Rudolf Diesel.

● In these engines, the fuel is injected into a combustion chamber and is then ignited by the high temperature of the air in the chamber.

● The high temperature of the air in the cylinder is due to the adiabatic compression. These engines only compress the air and not the fuel.

● When injected into the combustion chamber, the Diesel fuel undergoes spontaneous ignition.

● These engines work on the Diesel cycle, which consists of a constant pressure process, a constant volume process, and two isentropic processes. Difference Between Petrol and Diesel Engine Diagram

Difference between Petrol and Diesel Engine

Apart from the type of fuel used, the engines are also divided on the basis of a lot of things, such as the presence of a spark plug in Petrol engines and a fuel injector in Diesel engines. We also know that lighter vehicles such as motorcycles, scooters, and cars typically use petrol in their engines whereas Diesel is used in much heavier machinery such as tractors, trucks, and buses. Thus, the types of fuel used also plays a major role in defining the major difference between Petrol and Diesel engines. More differences between these types of engines are listed in the tabular column below.

S.no	Petrol Engines	Diesel Engines
1	A petrol engine draws a mixture of petrol and air during the suction stroke.	A diesel engine draws only air during the suction stroke.
2	The carburetor is installed in petrol engines to mix air and petrol in the required proportion and to supply it to the engine during the suction stroke.	The injector or atomizer is installed in diesel engines to inject the fuel at the end of the compression stroke.
3	The pressure at the end of the compression is about 10 bar.	The pressure at the end of the compression is about 35 bar.
4	The charge (i.e. petrol and air mixture) is ignited with the help of spark plug.	The fuel is injected in the form of a fine spray. The temperature of the compressed air is about 600° C at a pressure of about 35 bars.
5	A petrol engine has compression ratio approximately from 6 to 10.	A diesel engine has compression ratio approximately from 15 to 25.
6	The combustion of fuel takes place approximately at constant volume. In other words, it works on Otto cycle.	The combustion of fuel takes place approximately at constant pressure. in other words, it works on Diesel cycle.
7	The thermal efficiency is up to about 26%.	The thermal efficiency is up to about 40%.
8	Overheating trouble is more in petrol engine due to low thermal efficiency.	Overheating trouble is less in diesel engine due to high thermal efficiency.
9	The starting of petrol engine is easy due to low compression ratio.	The starting of the diesel engine is slightly difficult due to higher compression ratio compared to a petrol engine.
10	As the compression ratio is low, the petrol engines are cheaper and lighter in weight.	As the compression ratio is high, the diesel engines are costlier and heavier in weight.
11	The running cost of petrol engine is high because of the higher cost of petrol fuel.	The running cost of the diesel engine is low because of the lower cost of diesel fuel.
12	The maintenance cost is less.	The maintenance cost is more.
13	Petrol engines are high-speed engines.	Diesel engines are relatively low-speed engines.
14	The petrol engines are are installed in light duty vehicles such as scooters, motorcycles, cars. These are also used in airplanes.	The diesel engines are are installed in heavy-duty vehicles such as buses, trucks, tractors, earth moving machines, etc.

Team Work - Meaning and Tips for better Team Work

A single brain is not always capable of making key decisions on its own. To come up with an efficient solution, an individual requires the help and advice of others. A team is established when individuals get together on a common platform with the common goal of completing a task. To guarantee optimum compatibility, team members should ideally come from similar backgrounds and have a single aim. To provide their best, the team members must complement each other and function as a single unit in tight cooperation. "There is no I in Team Work," as the saying goes, and each member must put the needs of his team first. Personal interests must take a second seat. Any team's performance is directly proportionate to the relationship between its members and their combined efforts. What is the definition of teamwork? Teamwork is defined as the sum of each team member's efforts toward the fulfilment of the team's goal. In other words, any team's backbone is its ability t

Scientists discover a new theory / The fundamental property of light – 150 years after Maxwell

Light plays a vital role in our everyday lives and technologies based on light are all around us. So we might expect that our understanding of light is pretty settled. But scientists have just uncovered a new fundamental property of light that gives new insight into the 150-year-old classical theory of electromagnetism and which could lead to applications manipulating light at the nanoscale. It is unusual for a pure-theory physics paper to make it into the journal Science. So when one does, it’s worth a closer look. In the new study, researchers bring together one of physics' most venerable set of equations – those of James Clerk’s Maxwell’s famous theory of light – with one of the hot topics in modern solid-state physics: the quantum spin Hall effect and topological insulators . To understand what the fuss is about, let’s first consider the behaviour of electrons in the quantum spin Hall effect. Electrons possess an intrinsic spin as if they were tiny spinning-tops,

19 Types Of Content Writing Services For Your Business

It’s hard to know which type of content writing service is the best for your business. There are so many different types of content writing services out there that it’s easy to get confused. You end up wondering if you’re choosing the right one for you. In this post, we’ll get rid of this confusion, once and for all. I’m going to list out the different kinds of writing services you could use. By the end of this article, you’ll know whether you need a copywriter, a content writer, or a social media marketer and how they can help you achieve your business goals. This post is also useful for writers who want to hone their writing skills in a specific area. Let’s dive in and learn what types of content writing services exist and when you should use them. (Bonus – if you want to hire the top 1% of writers, go to the bottom to learn how). Types of Content Writing Services As we go through the list of content writing services, you will find that many of them overlap. That’s perfectly

The LimitlessX - Get Tech Science News around the Globe

Search This Blog