Saab Variable Compression engine

The Saab Variable Compression engine was a development project of Saab Automobile, for which it won an award both in 2000 and 2001.^[1]

In a normal internal combustion engine, because cylinder bore diameter, piston stroke length and combustion chamber volume are almost always constant, the compression ratio (CR) for a given engine is almost always constant.

One exception is the experimental Saab Variable Compression (SVC) engine, designed for the Saab 9-5. This engine uses a technique that dynamically alters the volume of the combustion chamber, thus changing the compression ratio.

To alter the combustion chamber volume, the SVC 'lowers' the

hydraulic actuator. This design was originally patented by Gregory J. Larsen of Lakeland, FL USA.^[2]

General Motors, when it took over Saab Automobile, due to cost.^{[citation needed}

]

External links

References

^ "Saab Global, Saab 9-5 SportCombi, Awards". Archived from the original on 2013-02-17. Retrieved 2012-03-29.
^ US patent 5025757, Gregory J. Larsen, "Reciprocating piston engine with a varying compression ratio", issued 1991-06-25

[1] "Saab Global, Saab 9-5 SportCombi, Awards". Archived from the original on 2013-02-17. Retrieved 2012-03-29.

[2] US patent 5025757, Gregory J. Larsen, "Reciprocating piston engine with a varying compression ratio", issued 1991-06-25

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