Ursachen für Leistungsstreuungen? | Posts 16+

Hi.

Quote:

For example, a manufacturer produces 100 vehicle engines in series, each with a rated power of 90 horsepower. . . . Despite mass production, only about 33 out of these 100 engines achieve the target of 90 horsepower. The reasons for this can be found in the varying mechanical tolerances of the individual components (pistons, engine block, cylinder head, etc.). The remaining two-thirds of these engines have a power output that varies between 90 horsepower and 100 horsepower, or slightly lower, in the range of 80 horsepower to 90 horsepower. . . .

Hmtja: While some responsible components have been mentioned, I don't quite understand the "underlying logic" behind it.

If 33 engines are supposed to have exactly the target output of 90 horsepower (i.e., are "perfect"), then the other engines should not deviate by more than 1 to 10 horsepower.
I'm thinking more along the lines of approximately 20 engines each with 89 or 91 horsepower, with 10 of each having 88 or 92 horsepower, and 3 of each having 87 or 93 horsepower, which should then define the maximum spread of +/- 4%.

In probability theory, there are "bell-shaped" curves for this.

However, the fact that Bertil's engine has 14% more power than it should, rather than 4%, is still strange, in my opinion.