Skip to main content

DIFFERENCE BETWEEN S.I AND C.I ENGINES

Criteria S.I. Engine (Petrol or Spark Ignition Engine) C.I. Engine (Diesel or Compression Ignition Engine) Working Cycle Works on Otto Cycle or Constant Volume Cycle. Works on Diesel Cycle. Mixture During Suction Stroke Takes a mixture of air and petrol during the suction stroke. Takes only air during the suction stroke. Fuel Used Uses petrol as fuel. Uses diesel as fuel. Compression Ratio Has a compression ratio that varies from 6 to 10. Has a compression ratio that varies from 16 to 20. Engine Weight and Cost S.I. engines are lighter and cheaper. C.I. engines are heavier and costlier. Initial Cost Initial cost is lower compared to C.I. engines. Initial cost is high due to high compression ratio. Starting Starting is easy. Starting is difficult, especially in cold conditions. ...

EXPLAIN CONSTRUCTION AND WORKING OF SLIDING MESH GEAR BOX

EXPLAIN CONSTRUCTION AND WORKING OF SLIDING MESH GEAR BOX

• CONSTRUCTION - In this the clutch gear which mounted on the clutch shaft. This gear box shaft is attached to the Clutch.
The clutch gear A meshed with lay shaft gear D .
Lay shaft is a intermediate shaft.
There are 3 gear on lay shaft E,F and G. There is also an idle shaft on which a small idle gear H is mounted. This idle gear used for reversing the direction of vehicles.
There is a main shaft which is aligned to the Clutch shaft. The two gear B & C mounted on main shaft in such a way they can slide on main - shaft.
SPLINED SHAFT IS ALSO CALLED Min shaft.
• WORKING - The gear A is always rotating when clutch is engaged. The gear D, E ,F ,G and H is also rotate with gear A. Because gear D is always meshed with A. But gear B and C is not meshed with any gear. When drivers need high and low speed the gear B and C is used.

FIRST GEAR - In this , the main shaft is slides on which gear  B ,C is mounted. The gear C slides and it  is meshed with gear F. Because of this Gear C and Gear F conection the main shaft is rotating.
The power is transmitted from clutch shaft through A,D,F and C to main shaft.

SECOND GEAR - The main shaft slides again and this time gear B is meshed with Gear E. This time power is transmitted through A,D,E and B to main shaft.

HIGH OR TOP GEAR - For high gear , the gear B is slides on main shaft in such a way that's it is directly engaged to gear A through splines. It mean the clutch shaft is connected to main shaft. 
It means the all power from clutch shaft is transfer to main shaft thats why is called high gear.
REVERSE GEAR - The gear C is slides on main shaft and it is meshed with idle gear H. It reverse the direction of rotation. 
The power is transmitted from clutch shaft through Gear A,D,G,H and C to main shaft.


Labels:

Popular posts from this blog

DIFFERENCE BETWEEN S.I AND C.I ENGINES

Criteria S.I. Engine (Petrol or Spark Ignition Engine) C.I. Engine (Diesel or Compression Ignition Engine) Working Cycle Works on Otto Cycle or Constant Volume Cycle. Works on Diesel Cycle. Mixture During Suction Stroke Takes a mixture of air and petrol during the suction stroke. Takes only air during the suction stroke. Fuel Used Uses petrol as fuel. Uses diesel as fuel. Compression Ratio Has a compression ratio that varies from 6 to 10. Has a compression ratio that varies from 16 to 20. Engine Weight and Cost S.I. engines are lighter and cheaper. C.I. engines are heavier and costlier. Initial Cost Initial cost is lower compared to C.I. engines. Initial cost is high due to high compression ratio. Starting Starting is easy. Starting is difficult, especially in cold conditions. ...
Read more

LANCASHIRE BOILER

LANCASHIRE BOILER -   It is non portable fire tube type horizontal boiler. It consists of cylinder shells with two tubes A and B called Fire Tubes which are symmetrical in dimension. Each Fire Tubes Contain a furnace in front of it, there is a Grate over which fuel is burn. CONSTRUCTION - it is a stationary fire tube internally fired horizontal boiler. These boiler have a cylinder shell of 2m in diameter and it's length varies from 7.5m to 10m . It has two large internal fire tubes having diameter 80cm to 100 cm in which grate is situated. WORKING - The fuel is burn in a fire great and on burning the fuel combustion Process take place The fuel gas enter the main tube by the fire deflector. As the flue gas moves in tubes they heat up the tubes and water which is surrounded the tubes is also heated. After this process water is converted into steam. The steam is taken out from steam supply valve. Application - it is used in sugar mills and chemical industry. ADVANTAGES •  It...
Read more

FIRE AND WATER TUBE BOILER

Water Tube Boiler Fire Tube Boiler The rate of steam generation is high, up to 450 tonnes/hr The rate of steam generation is low, up to 9 tonnes/hr It generates steam at high pressure up to 165 bar It generates steam at low pressure, up to 24.5 bar Its overall efficiency is 90% Its overall efficiency is 70% Less water is required for steam generation More water is required for steam generation It is suitable for load fluctuations It is not suitable for load fluctuations Water flows in tubes which are surrounded by fire Fire flows in tubes which are surrounded by water Operating cost is high Operating cost is low Wall thickness is less Wall thickness is more Cost of installation is high Cost of installatio...
Read more