Showing posts with the label mechanism

Radial engine mechanism

The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders point outward from a central crankshaft like the spokes on a wheel. This configuration was very commonly used in large aircraft engines before most large aircraft started using turbine engines. In a radial engine, the pistons are connected to the crankshaft with a master-and-articulating-rod assembly. One piston, the uppermost one in the animation, has a master rod with a direct attachment to the crankshaft. The remaining pistons pin their connecting rods ' attachments to rings around the edge of the master rod. Four-stroke radials always have an odd number of cylinders per row, so that a consistent every-other- piston firing order can be maintained, providing smooth operation. This is achieved by the engine taking two revolutions of the crankshaft to complete the four strokes, (intake, compression, power, exhaust), which means the firing order is 1,3,5,2,4 and back

Crank Slider Mechanism

Slider-Crank Mechanism ,   arrangement of mechanical parts designed to convert straight-line motion to rotary motion , as in a reciprocating piston engine , or to convert rotary motion to straight-line motion, as in a reciprocating piston pump. The basic nature of the mechanism and the relative motion of the parts can best be described with the aid of the accompanying , in which the moving parts are lightly shaded. The darkly shaded part 1, the fixed frame or block of the pump or engine, contains a cylinder, depicted in cross section by its walls DE and FG, in which the piston. for the video of the above mechanism click here

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Steering Systems

Steering Systems 27.6.1. Function and Linkage of a Steering System The function of a steering system is to convert the rotary movement of the steering wheel in driver's hand into the angular turn of the front wheels on road. Additionally, the steering system should provide mechanical advantage over front wheel steering knuckles, offering driver an easy turning of front wheels with minimum effort in any desired direction. The main causes of stiff steering include (i) insufficient lubrication of the king-pins or steering linkage, (it) tyre pressure too low, (Hi) wheels out of track, i.e. toe-in not correct, and (iv) stiffness in the steering column itself, caused by lack of lubricant or over tightening. The steering system is designed to enable the driver to control and continuously adjust the steered path of the vehicle. Also it provides a positive response to whatever direction the driver may makes on the steering wheel. Fig.27.42. Relationship of steer angle speed and vehicle spee