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第4节宝马xDrive四驱系统宝马xDrive四驱系统由电控多片离合器和分动器组成。它没有传统意义上的中央差速器,而是通过控制电动机施加在多片离合器上压紧力的大小而实现前后轮差速和差速限制的。这就像是宝马的电子气门发动机,通过直接控制气门的升程而改变进气多少的,而不是通过节气门来控制进气多少。宝马将原本用来控制差速限制的多片离合器直接变成了调节前后轮差速的装置,而不再需要传统的齿轮差速器。
Section 4 BMW xDrive four-wheel drive system BMW xDrive four-wheel drive system consists of electric multi-plate clutch and the transfer of components. It does not have the traditional central differential, but by controlling the motor applied to the multi-clutch clutch pressure on the size of the front and rear wheel differential and differential limits. It’s like a BMW’s electric valve engine that changes how much air is injected by directly controlling the lift of the valve, rather than how much air is being controlled by the throttle. Instead of a conventional gear differential, BMW turned the multi-plate clutch originally used to control differential limits into a device that adjusted the front and rear wheel differential.