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【正文】 udes an engine, an electric machine including a rotor, a layshaft gearset including an input driveably connected to the engine and an output, for transmitting power between the input and the output and producing a first speed differential that causes a speed of the input to exceed a speed of the output, first and second driveshafts, a differential mechanism driveably connected to said output, for transmitting power between said output and the driveshafts, and a plaary gear unit driveably connected to the output and the rotor, for transmitting power between said rotor and said output and producing a second speed differential that causes a speed of the rotor to exceed the speed of the torque reaction for the speed reduction plaary gearing is provided on a housing through a bore of a shaft or drum rather than through an outer diameter of the housing, thereby simplifying the bearing support requirements and allowing pact positioning of the mechanical drive elements. Use of plaary gearing to reduce the speed of elements driven by the electric machine in the electric only drive path reduces the size of the package space required for the drive unit. The scope of applicability of the preferred embodiment will bee apparent from the following detailed description, claims and drawings. It should be understood, that the description and specific examples, although indicating preferred embodiments of the invention, are given by way of illustration only. Various changes and modifications to the described embodiments and examples will bee apparent to those skilled in the art. MACHINABILITY The machinability of a material usually defined in terms of four factors: Surface finish and integrity of the machined part。t have the same hight for their roll center. The roll axis is that axis, that goes through the roll center of front and rearaxle, see following drawing: Roll Axis If a lateral force is applied at the center of gravity, the moment resulting fom the hight of the center of gravity above the roll axis has to be pensated by a moment caused by the suspension springs due to some roll. The distribution of this moment between front and rear axle depends on the relative spring stiffness of front and rearaxle, the overall roll angle (which is the same for front and rearaxle) depends on the sum of the suspension stiffness (front plus rear). The moment transmitted to the ground without any roll for the overall vehicle is given by the applied lateral force times the roll axis hight (at the position of CG). (Remark: If the roll axis is above the CG, the remaining torque that has to be pensated by the suspension springs would make the car lean inside like a motorcycle!). The distribution of this moment between front and rearaxle can be calculated by calculating each axle seperately, byusing the position of the roll center of the corresponding axleusing the fact that the part of lateral force, that the axle has to carry, corresponds to the part of the n
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