Chong Chi blue sky engine SKYACTIV-G Profile

Mazda CX-5 conference just held in Beijing, the entire conference focused on technical excellence, environmental protection first "theme, which also made Mazda the first time Chong Chi blue sky CX-5 series (SKYACTIV Technology) The media has done a detailed explanation.
The so-called of Chong Chi Blue Sky (SKYACTIV Technology) engine technology, is to enhance engine performance, creating ultra-high compression ratio to ensure power output, while also reducing emissions. Most of the energy generated in the fuel combustion process for an internal combustion engine will be converted into the exhaust loss and the cooling loss, pumping loss, mechanical loss of four major loss and wastage. To improve the thermal efficiency of the internal combustion engine is to reduce the loss of four kinds. In order to reduce these four losses, it is able to control the compression ratio, the air-fuel ratio, the combustion time, the combustion timing, pumping loss, mechanical resistance, etc. six factors. Mazda believes that as long as these six major controlling factors for the ideal configuration, will be able to improve the performance of the internal combustion engine, creating a higher compression ratio. But the biggest problem you want to create very high compression ratio, need to be addressed is the engine knock.Mazda realized high compression settings can cause engine knock hazardous exhaust design using ordinary civilian car rarely used 4-2-1 exhaust head coke design to improve the efficiency of each cylinder exhaust , to reduce the residence time of the hot air within the cylinder. At the same time, 4-2-1 exhaust system due to long distance from the catalyst exhaust temperature drops, not early activation of the catalyst, Mazda also the ignition time delay setting to resolve this issue. Of course, the particular design of the piston top left open, helping the uniform combustion of the combustible mixture distribution to improve combustion efficiency.Coke 4-2-1 exhaust header commonly used in racing.
Improved combustion efficiency, expect to play a high-performance engine strength needed to improve the engine's mechanical resistance, lightweight brunt. According to Mazda, the special enhanced Chong Chi blue sky engine internal engine parts are all lightweight design, the piston and the piston pin to reduce the weight of 20% compared to the previous engine, connected to the crankshaft connecting rod is also 15% lighter crankshaft at the same time The main journals small valve tension and the piston friction also decreased.
Do a good combustion performance and reduce the mechanical resistance, SKYACTIV-G engine was to be the birth, this engine final compression than fixed grid in 14.0 compression ratio, higher than Ferrari's highest compression ratio, at the same time demand for gasoline is also somewhat reduce .