variable compression ratio造句

In addition to this, model diesels have variable compression ratios.
Variable compression ratio is one cost effective way of achieving these targets.
Variable Compression Ratio ( VCR ) is becoming increasingly desirable as oil prices increase and car buyers have an increased interest in fuel economy.
The main difference is due to the piston motion not being restricted by a crankshaft in the free-piston engine, leading to the potentially valuable feature of variable compression ratio.
These two modes of operation require different compression ratios, achieved via a concept similar to that of the Lanchester shaft, which is why the engine also features a variable compression ratio.
It's difficult to find variable compression ratio in a sentence. 用variable compression ratio造句挺难的

A four-stroke, air-cooled unit, it had seven cylinders and a variable compression ratio, altered by changing the wobble-plate angle and hence the length of piston stroke.