The gear ratio of a gear train is the ratio of the angular velocity of the input gear to the angular velocity of the output gear, also known as the speed ratio of the gear train. The gear ratio can be computed directly from the numbers of teeth of the various gears that engage to form the…
Use of Gears- ● To reverse the direction of rotation ● To increase or decrease the speed of rotation ● To move rotational motion to a different axis ● To keep the rotation of two axis synchronized Advantages of Teeth- ● They prevent slippage between the gears – therefore axles connected by gears are always synchronized exactly with one another….
● Pitch surface: The surface of the imaginary rolling cylinder (cone, etc.) that the toothed gear may be considered to replace. ● Pitch circle: A right section of the pitch surface. ● Addendum circle: A circle bounding the ends of the teeth, in a right section of the gear. ● Root (or dedendum) circle: The circle bounding the spaces between the teeth, in a…
1. Spur Gear 2. Helical Gear 3. Herringbone Gear 4. Bevel Gear 5. Worm Gear 6. Rack and Pinion 7. Internal and External Gear 8. Face Gear 9. Sprockets 1) Spur Gear-Parallel and coplanar shafts connected by gears are called spur gears. The arrangement is called spur gearing. Spur gears have straight teeth and are parallel to the axis of the wheel. Spur gears…
1) Number of teeth 2) Form of teeth 3) Size of teeth 4) Face width of teeth 5) Style and dimension of gear blank 6) Design of the hub of the gear 7) Degree of precision required 8) Means of attaching the gear to the shaft 9) Means of locating the gear axially to the…
A gear also known as “gear wheel” is a rotating machine part having cut teeth, or cogs, which mesh with another toothed part in order to transmit torque. Two or more gears working in tandem are called a transmission and can produce a mechanical advantage through a gear ratio and thus may be considered a simple machine. Geared devices can change the speed, magnitude, and direction…
· Heat escaping from the cylinders and the engine. Not all of the energy created in combustion is able to drive the car. · Friction between moving parts converts some of the energy to heat which is dissipated to the environment. Keeping your engine well lubricated will help reduce this loss. · Pumping fuel to the engine. Since…
The efficiency of the engine depends to a large extent upon the following criteria: · Compression · Combustion Process · Air/Fuel Mixture · Mechanical Design · Lubrication 1) Compression The higher the Compression Ratio or the pre-compression pressure, then the higher is the thermal efficiency of the internal combustion engine. This results in a better fuel…
Car manufacturers are constantly playing with all of the following variables to make an engine more powerful and/or more fuel efficient. 1. Increase displacement – More displacement means more power because you can burn more gas during each revolution of the engine. You can increase displacement by making the cylinders bigger or by adding more cylinders….
Three fundamental things can happen: a bad fuel mix, lack of compression or lack of spark. Beyond that, thousands of minor things can create problems, but these are the “big three.” Based on the simple engine we have been discussing, here is a quick rundown on how these problems affect your engine: Bad fuel mix – A bad fuel mix can…