î î î. block grants. categorical grant. commerce clause. cooperative federalism. devolution. elastic clause. federalism. line-item vote. mcculloch vs. maryland. necessary and proper clause. new deal. nullification. reapportionment. sovereign immunity. spending clause. supremacy clause. unfunded mandates.
The compression ratio is the ratio of the volume of the cylinder and the combustion chamber when the piston is at the bottom, and the volume of the combustion chamber when the piston is at the top. Automotive engineers can improve fuel efficiency and fuel economy by designing engines with high compression ratios.
Page 1 of 2 1 2 Next >. In an internal combustion engine, a piston compresses a large volume of a mixture of fuel and air into a very small space. The ratio of the maximum piston volume to the minimum compressed volume is called the compression ratio.. Compressing the fuel and air will make them burn faster, which (though I'm not sure directly how) makes the engine run better.