HPSA (B-TECH automobile engineering 7-8th)

Introduction to Fluid Power: Application of hydraulics and pneumatics in various fields of

engineering, properties of fluids, effect of temperature, Hydraulic symbols- Circuit elements,

fluid pumps, motors, valves, types of control, reservoirs, advantages and disadvantages of

hydraulic systems.

Elements of Hydraulic System: Pumps- Types of pumps and its selection. Hydraulic

cylinders and rams- IISingle acting and double acting, telescopic, seals, design considerations

for pump, motor, cylinder and ram, fluid power plumbing requirements, type and purpose of

strainer, filter, accumulator and its types, design considerations, reservoir, fluid temperature

control, types of heat exchangers.

Control of Hydraulic Elements: Types of pressure control, Directional control valves-Two

way, four way two position, four way three position, manual operated, solenoid operated.

Flow control valves, pressure switches, check valves, quick exhaust valve.

Hydraulic Circuits: Pressure regulating circuit, speed control circuit, accumulator circuit,

booster and intensifier circuit, motion synchronizing circuit, servo circuit.

SECTION – II

Introduction to Pneumatics:

Application of pneumatics in engineering, basic requirements of pneumatic system,

comparison with hydraulic system

Elements of Pneumatic System: Air compressor - Types, selection criteria, capacity control,

piping layout, fittings and connectors, pneumatic control, Direction control valves, two way,

three way, four way check valves, flow control valves, pressure control valves, speed

regulators. Quick exhaust valves, solenoid, pilot operators, Cylinders- Types and their

mountings, hoses and connections, Air motors- Types, comparison with hydraulic and

electric motor. Filters- Types of filters, regulators, lubricators, mufflers, dryers.

Pneumatics Circuits and Applications: Basic pneumatic circuit, impulse operation, speed

control, pneumatic motor circuit, sequencing of motion time delay circuit & their

applications.

Automatic Control: Need of control: Manual v/s automatic control, advantages of automatic

control, open loop v/s closed loop control, generalized control system, merits, demerits and

Applications, Mathematical conversion of control components: Helical spring, viscous

damper and their combinations, resister, inductors, capacitor, series and parallel electrical

circuits and mech. Systems, thermal and fluid systems, direct and inverse analog, grounded

chair representation for material system. Block diagram algebra: Rules of block diagram

algebra, reduction of block diagram, block diagram transfer function representation of speed,

temperature and fluid systems, AC & DC Motors. Modes of control: On off control,

proportional (P) control, integral (I) control, derivative control, P+I, P+D, P+I+D (including

an analytical treatment).