A Complete Online Guide For Every Mechanical Engineers
Carburetor: Carburetion is the process of measuring, mixing and supplying to a spark ignition engine continuously a suitable combustible mixture of fuel and air. This mixture supply must be in accordance with the engine speed and load requirements. The carburetor supplies this mixture to an engine. The carburetor consists basically of a float chamber and…
We consider that the valves open and close at the dead centre positions of the piston. But, in actual practice they do not open and close instantaneously at dead centres. The valves operate some degrees before or after the dead centres. The ignition is also timed to occur a little before the top dead…
Parts of tyre The tyre is made of many different parts that are moulded together to form the complete structure. The parts are built up, one at a time on a collapsible drum. The components of a tyre in the order of assembly are as follows: 1. Liner 4. Tread layer. 2. Cords and plies. …
Choking device Starting an engine in cold weather is somewhat difficult. Choking device makes engine starting easier. The choke valve is butterfly valve, similar to the throttle valve. This valve is situated between the air intake and the venture. At the time of starting, the choke valve is turned to close almost the inlet passage….
Propeller shaft or Drive Shaft The propeller shaft connects the transmission shaft to the pinion shaft at the wheel axle. The propeller shaft is also called driveline shaft or drive shaft. The propeller shaft carries the power from the engine, clutch and transmission unit to the driving wheels of the vehicle, through the final…
Antilock or antiskid device The vehicle will stop more quickly if the brakes are applied just hard enough to get maximum static friction between the tyres and road. If the brakes are applied harder than this then the wheels will lock, the tyres will skid or slide on the road and a lesser kinetic friction…
Power steering In heavy duty (dump) trucks and power tractors the effort applied by the driver is inadequate to turn the wheels. In this case a booster arrangement is incorporated in the steering system. The booster is set into operation when the steering wheel is turned. The booster then takes over and does most of…
Automatic transmission There are two types of automatic transmission (gear box), namely, semi-automatic transmission and transmission and fully automatic transmission. These are distinguished according to their effect on vehicle handling dynamics. Semi-automatic transmissions are the gear boxes on which all operations normally performed by the driver when changing gear are carried out by electronically controlled…
Seat belts safety systems in vehicles: The function of the seat belts is to restrain the occupants of a vehicle in their seats when the vehicle hits an obstacle.
Super plastic forming process (SPF) is appreciated tool for the fabrication of complex parts used in the aircraft and automobile industries.
Components of a common rail system In the common rail system, a pressure sensor measures the fuel pressure in the rail, its signal valve is compared with the desired value stored in the engine computer. If the measured value and the desired value are different, an overflow orifice in the pressure regulator on the high…
Mechanical fuel injection systems In the year of 1927 Bosch brought the first mechanical hydraulicfuel injection system for truck diesel engines. This made diesel engines familiar among people. In1932 the complete fuel system consisting of nozzle holder assembly, nozzle, filter system was introduced. Jerk pump injection system The jerk pump controlled system has a single…
Hybrid Drive Trains Hybrid vehicles The term Hybrid drive denotes such vehicle drives with more than one drive source. Hybrid drives can incorporate several similar or dissimilar types of energy stores and/or power converters. The goal of the hybrid drive developments is to combine different drive components, such that the advantages of each are utilized…
Blow moulding Working principle In this process between the two parts of open moulds a hot extruded tube called parison is placed. The two valves of the moulds move close to each other so that the moulds closes over the tube. The parison’s bottom end is sealed. The molten plastic is mould with the help…
