What is the impact of compression ratio on engine performance

Compression ratio is a basic parameter that can mainly reflect the working efficiency of the engine. For the natural intake engine, the improvement of compression ratio represents the relative improvement of the performance and efficiency of the engine without considering other factors.  But the compression ratio can not be too high, because it will give the gasoline engine detonation, this kind of situation will be more serious adverse impact on the working life of the gasoline engine, so often need to reduce the probability of detonation through the application of high grade of gasoline.  

What is the impact of compression ratio on engine performance?  

What are the adverse effects of compression ratio on engine performance?  

If the engine compression ratio, the greater the represents the greater the pressure of oil and gas mixture is compressed, the higher the temperature is relatively, the mixture of diesel fuel vaporization more completely, more easy to burn, completely after compression ignition moment, when can be released within a very short time more and more mechanical energy,  The mechanical energy generated by the combustion is transmitted to the motor through the piston, crankshaft and other mechanisms, and becomes the motor power generation.  

If lower compression engine, diesel molecule vaporizing didn't completely, so after the spark plug on burning rate is relatively slow, it will be part of the mechanical energy is converted into heat energy, causes the engine temperature rises, but not completely converted into mechanical energy, and therefore the same situation in the cylinder volume,  A higher compression ratio represents greater power input and output.  

Generally speaking, the greater the compression ratio of the engine, the higher the efficiency of the engine, the better the performance, and the fuel economy can also be.  But the compression ratio of the engine is not the greater the better, but to be appropriate.  Too high compression ratio will lead to reduced stability and engine life.  The most suitable compression ratio is designed so that the driving force, economic benefit and reliability of the engine reach a perfect and stable balance. 

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