Induction

Induction - motorcycle dictionary definitions

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In motorcycling, Induction can be defined as:

Forced induction is used to improve engine power, efficiency, and emissions without much extra weight and minimal modifications to the engine architecture. Two commonly used forced induction technologies are turbochargers and superchargers. Since only so much energy can be had from a given amount of gasoline, the faster gasoline can be burned in the cylinder, the more power can be produced. An engine can only take in so much when breathing air at atmospheric pressures, since the capacity and number of cylinders is non-variable. The only way to get more air into the cylinder, and therefore produce more power, is to increase the pressure at the intake. One of the primary concerns in internal combustion emissions is a factor called the NOx fraction, or the amount of nitrogen/oxygen compounds the engine produces. High combustion temperatures lead to a lower NOx fraction, and since gasses heat when compressed, the more gas is compressed in a given volume, the hotter it will get, and the lower the NOx fraction will be. Forced induction increases the amount of gas being compressed, and it increases the heat generated when compression occurs. Since colder air is denser, it is most desirable, from a power standpoint, to have cold air coming in, but better from an emissions standpoint if the air is hot....

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