One of the mysteries of the English language finally explained.
The ratio of the volume of fluid actually displaced by a piston or plunger to its swept volume.
- ‘Thanks in part to the advent of electronic controls, engineers are trimming losses, perfecting combustion, boosting volumetric efficiency and raising redlines.’
- ‘The diesels will require better volumetric efficiency in order to achieve more complete combustion, thereby reducing emissions.’
- ‘It becomes a four-cylinder engine running at a more open throttle condition, improving volumetric efficiency and reducing pumping losses, with very little loss in the system.’
- ‘The all-aluminum head has a pent-roof combustion chamber with a long narrow 21.5 inch included angle to improve volumetric efficiency.’
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