Tech@Edu

Power Steering “The power steering system is the advanced steering system in which the effort required to steer the front wheels of the vehicle side to side is reduced by using intermediate electric or hydraulic devices that multiplies the force applied by the driver through steering wheel in order to achieve smooth and quick directional change of the vehicle.”  History of Power Steering System According to the legend advanced by a serious publication on the history of automobile steering systems, a man by the name of Fitts installed a power steering system on an antique car in 1876. Robert E. Twiford, an American from Pennsylvania, patented the first all-wheel drive system on April 3, 1900, and his patent included a power steering system. Francis W. Davis, an engineering in the Heavy Vehicles division at Pierce-Arrow, invented a concept similar to the one used today in 1926. He offered it to GM, but they determined that it would be too expensive to make and include in mass-market ...

Steering System “The steering system allow the driver to guide the car along the road & turn left or right as desired.”  The system includes the following:  1. The steering wheel  2. The steering gear  3. The steering linkage  The steering system configuration depends upon the vehicle design (the drive train & suspension system used).  Function of Steering System 1. The primary function of the steering system is to achieve angular motion of the front wheels to negotiate a turn.  2. To provide directional stability of the vehicle when going straight ahead.  3. To minimize wear & tear of the tires.  4. To absorb a major part of the road shocks thereby preventing them to get transmitted to the hands of driver.  5. To provide perfect rolling motion of the road wheels at all times. Requirement of good steering system  1. Very accurate.  2. Easy to handle.  3. Provide directional stability.  4. Multiply the...

Front Axle & Stub Axles Front Axle "Front axle is an axle over which the front wheels are mounted. The front axle is fitted with wheels at its end. A part of the weight of the vehicle is transmitted to the wheels through this axle.”  The front wheels are fixed to the chassis in two ways i.e. either with the independent suspension system or with the help of axle beam with leaf spring. Functions of Front Axle The front axle perform the following functions:-  1. It carries the weight of the front of the vehicle.  2. It carries the horizontal & vertical loads on bumpy roads.  3. It works as a cushion through its spring for a comfortable side.  4. In four wheel drive it also transmits power to the road vehicles.  5. When brakes are provided at the front wheels, it withstands bending stresses & torsional stresses. Types of Front Axle 1. According to Load 1. Dead front axle  2. Live front axle  1. Dead front axle – The dead axles are thos...

Rear Axle “A Rear axle is a shaft which is lie between the differential & driving wheels & transmit power from the differential to the driving wheels.”  Its consists of two halves connected by the differential, one part is known as Half Shaft. Inner end of the half shaft is connected to the Sun gear of the differential & the outer end to the driving wheels. Functions of Rear Axles The rear axles perform the following two functions.  1. Carry the weight of the vehicle.  2. To rotate & transmit the power from engine to the wheels. 3. Provide the final speed reduction between drive shaft & axle shaft through final drive gears. 4.   Act as a Thrust & torque reaction member during acceleration  & breaking. 5.   Changing drive shaft rotation by 90 degree to rotate the axle shaft. Types of Rear Axles Housing The rear axles differ from the front axle in that it contain no joint at its outer ends. Its housing are two types 1. Banjo type...