NO SPARK PLUG IN DIESEL ENGINE !!! KNOW THE REASON !!

Why do diesel internal combustion engines require no spark plug to ignite the fuel unlike petrol engines?

To know the reason, we should first understand the processes in both engines.

In petrol engine, air-fuel mixture is administrated into the cylinder. The compression ratio of petrol engines is lower than diesel engines, i.e, 6–10. So when the charge is compressed inside the cylinder , the temperature of the charge will be less than the auto ignition point of the petrol and hence will not ignite. So a spark is produced by the spark plug to ignite the charge.

In diesel engines, the compression ratio is much higher,i.e 16–20. 

In this engine, only air is administrated into the cylinder. When the air is compressed in the compression stroke, the temperature of the air will be very high. Now when the fuel is injected by the fuel injector under high pressure, the fuel mixes with air in the cylinder and since the temperature of air is sufficiently high, the fuel will ignite without any external aid.

CHECK OUT THE DIFFERENCE BETWEEN KERB WEIGHT,GROSS WEIGHT AND DRY WEIGHT !!

KERB WEIGHT:-
The kerb or curb weight is the weight of the vehicle minus any passengers or cargo. This refers to the weight of the car if it was parked on the curb without anything in it. It still has all the necessary equipment and fuel but doesn't have any added weight that isn't built into the car.It includes full tank fuel.

GROSS WEIGHT:-
The gross weight refers to the car's total weight when it has added passengers and cargo. This figure is especially important when transporting luggage through areas that may have restrictions on gross weight. Truck drivers must pay special attention to their gross weight as their are limitations to how heavy their load can be.

DRY WEIGHT:-
When the bike or any vehicle  is manufactured on the assembly it does not have absolutely any kind of fluids in it. It is totally dry containing nothing but metal and fiber and plastics and that’s all. It is the most basic weight of the bike during assembly but it is not usable yet. After adding all the fluids the weight of the bike will vary, but the basic dry weight of the bike is never going to change at all.

DIFFERENCE BETWEEN BOLT AND NUT EXPLAINED !!!

A bolt is a type of screw used to hold objects together. A nut is a small metallic object which is fastened to a bolt.

Bolts and nuts are nearly always used together to fasten a stack of parts together. A nut is a small metallic object, whereas a bolt is basically a screw.

A nut is a small hexagonal object made out of metal. It is shaped in a hexagon so that it is easy and firm to grip from all sides. It has a hole in its centre, which has a thread running around it. A thread is a spiral cut groove. It is used as a fastener to a matching bolt. The bolt and the nut are kept together by a combination of their threads' friction. Nuts come in various types, including hex, cap, coupler, wing, turnbuckle and lock.

A bolt is a long metallic piece that has a round stem as its body. The body is threaded in a helical (circular) manner. The metallic piece is topped with a head on one end that allows it to be turned, either into the object or the nut. Some bolts are threaded its full length, while some are threaded for a small length at the other end, opposite the head. There are many types of bolts, such as hex type, square, round and flat head bolts. Bolts called studs and threaded rods don’t have heads, anchor bolts or toggle bolts.

Nuts and bolts are mainly made of metal, usually carbon steel. They are often coated with zinc, which prevents corrosion. Aluminum, plastic, brass, stainless steel and just steel are also sometimes used to produce nuts and bolts.

Selecting which nut and bolt to use where depends on the environment in which the object is, as well as the strength and thickness of the object.

To make it simple,

Bolt has more alphabet (BOLT),so bigger one is bolt.

Nut has less alphabet (nut),so smaller one is nut.