在过去,尤其是化油器时代,发动机的喷油是纯机械控制的,喷油精度有限,而且喷油无法根据工况实现智能调节。这种情况下,燃油标号的确与压缩比密切相关。发展到现在的电喷时代,理论上已经完全可以做到高压缩比的车,只要能够解决低浓度混合气下的点火问题,都能够适应低标号燃油。 In the past, especially in the era of carburetor, engine oil injection was purely mechanical control, fuel injection accuracy is limited, and fuel injection can not be adjusted intelligently according to working conditions. In this case, the fuel label is indeed closely related to the compression ratio. Development to the current EFI era, in theory, has been able to do a high compression ratio of the car, as long as it can solve the low concentration of the mixture of ignition problems, are able to adapt to low-grade fuel.