Switching-type driving device for hybrid vehicle

Abstract

The invention discloses a switching type driving device for a hybrid vehicle, which is a driving device belonging to the technical field of new energy power dividing hybrid power electric drive assemblies. The invention aims to provide a transmission device with better dynamic property and economy. According to the technical scheme, the double-selection connection switching device comprises a driving unit, a first driven unit and a second driven unit, and the driving unit is rotationally connected with the first driven unit and the second driven unit in a switching mode. The first driven unitis coaxially connected with a planet carrier of a planet row in an integrated rotating mode, and the second driven unit is coaxially connected with an inner gear ring of the planet row in an integrated rotating mode. The invention provides a switching type driving device for a hybrid vehicle, which can directly output all engine power and torque to a wheel end when the vehicle speed is higher, andcan realize better dynamic property and economy.

Description

technical field [0001] The invention relates to the technical field of a new energy power split hybrid electric drive assembly, in particular to a switchable drive device for a hybrid vehicle. Background technique [0002] At present, in the field of hybrid vehicle drive devices, the main technical representatives are Toyota THS system and Honda i-MMD system. The former uses planetary row to realize power coupling and shunting, and then realizes the hybrid mode of series and parallel connection at the same time. The latter uses clutch device to realize Switching between series and parallel, most of the configurations of other manufacturers’ hybrid drives are based on these two types of technologies. At the same time, due to the technical protection and barriers of the planetary row, most of the current market adopts a configuration similar to Honda’s i-MMD system. [0003] With the further stringent emission regulations, higher requirements are put forward for the fuel econo...

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Problems solved by technology

[0003] With the further stringent emission regulations, higher requirements are put forward for the fuel economy of the powertrain. Because the power split can realize the stepless speed regulation of the engine, it has inherent advantages in terms of fuel saving ability. At the same time, with consumption upgrades For new generations, better power performance under the premise of fuel saving is what the market likes. For this reason, it is necessary to further optimize the core technology of the current new energy powertrain drive device, so that it has better fuel saving effect and takes into account good performance. Power performance, the series-parallel scheme has a fixed speed ratio from the engine to the wheel end or the generator, and cannot be adjusted steplessly, resulting in the inability to exert the best fuel economy. The planetary row power split scheme has inherent advantages. Based on a known A hybrid powertrain with a good fuel-saving effect should adopt a device that can realize stepless speed regulation of the engine

[0004] The current power split configuration has the following problems: 1. The high-speed overtaking performance is weak, because the torque of the engine cannot be fully output to the wheel ends; 2. When cruising at high speed, the vehicle requires the engine to provide greater power, and the power is shunted through the planetary row due to transmission. loss of power due to efficiency

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