powerplant

Abstract

The present invention provides a power plant capable of improving the responsiveness of the device, reducing the weight and manufacturing cost, and improving the efficiency of the vehicle. The rotational speeds of the first rotation element to the third rotation element satisfy the collinear relationship arranged sequentially on a single straight line in the collinear diagram, the first rotation element and the second rotation element are respectively connected to the first rotating electrical machine and the wheel, and the first rotation element The first disconnecting member and the second disconnecting member of the one-way clutch are respectively connected with the first rotating element and the second rotating element, and the first rotating element and the second rotating element are connected by the transmission of the rotating power from the first rotating electric machine. When the element rotates in the first predetermined rotation direction, the transmission of the rotational power from the first disconnecting member to the second disconnecting member is cut off, and the second rotating element and the first When the rotating element rotates in the first predetermined rotating direction, the transmission of the rotating power from the second disconnecting member to the first disconnecting member is connected, and the third rotating element is allowed to rotate in the first predetermined rotating direction through the second one-way clutch. rotation, and prevent the third rotation element from rotating in the direction opposite to the first specified rotation direction.

Description

technical field [0001] The invention relates to power units for driving wheels. Background technique [0002] Conventionally, as such a power unit, for example, a configuration disclosed in Patent Document 1 is known. This power unit is used to drive the left and right wheels of a vehicle equipped with an engine as a power source, and includes a single pinion type first planetary gear unit and a second planetary gear unit, and a first rotating electrical machine and a second rotating electrical machine as a power source. , a one-way clutch, a multi-plate hydraulic brake, and a control device for controlling the hydraulic brake. The first sun gear of the first planetary gear unit and the second sun gear of the second planetary gear unit are mechanically connected to the first rotating electrical machine and the second rotating electrical machine, respectively, and the first carrier and the second planetary gear of the first planetary gear unit The second gear carrier of the...

AI Technical Summary

Problems solved by technology

[0010] As described above, in the conventional power plant, when switching between the regeneration of the first rotating electric machine and the second rotating electric machine using the rotational power of the left and right wheels, and the driving of the left and right wheels by the first rotating electric machine and the second rotating electric machine, it is necessary to Switching between braking and releasing of the hydraulic brake, so the switching response is relatively low

In addition, since the actuator for driving the hydraulic brake is required, the weight and manufacturing cost of the entire power plant increase accordingly.

Moreover, when the first rotating electric machine and the second rotating electric machine are powered running while the hydraulic brake is released, the brake pads of the multi-plate hydraulic brake are always dragged and rotated, so the hydraulic brake has a wet structure. Under the circumstances, especially under the action of shear resistance based on the viscosity of the lubricating oil, a large drag loss will be generated, which will reduce the efficiency of the vehicle

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