Hybrid drive systems and vehicles

Abstract

A hybrid drive system, comprising a planetary gear device, an input shaft, an intermediate shaft, an engine, a generator, a drive motor, a first clutch, a second clutch, a braking device, and a power battery; the planetary gear device includes a sun gear, a planet carrier and the ring gear, planetary gears are arranged on the planetary carrier, and the planetary gears mesh with the sun gear and the ring gear respectively, the sun gear is connected with the ring gear through the second clutch, the planetary carrier is connected with the intermediate shaft, and the ring gear is connected with the input shaft; the engine The first clutch is connected to the input shaft; the generator is connected to the input shaft; the drive motor is connected to the intermediate shaft; in the series mode, the drive motor outputs power; in the parallel mode, the engine and the drive motor output power; the hybrid drive system can Drive alternately in series drive mode and parallel drive mode, set the time threshold according to the temperature of the generator and power battery, and switch from the current drive mode to another mode when the driving time is greater than or equal to the time threshold. The invention also relates to a vehicle.

Description

technical field [0001] The invention relates to the technical field of hybrid drive, in particular to a hybrid drive system and a vehicle. Background technique [0002] With the increasing demands of environmental protection and national energy strategy to reduce oil imports, the development of environmentally friendly and energy-saving automobiles has become the development direction of the automobile industry. [0003] Among energy-saving vehicles and new energy vehicles, the technical bottlenecks of long charging time and short winter mileage of pure electric vehicles have not yet been broken through; the cost of hydrogen fuel cell vehicles remains high, and the construction of hydrogen refueling infrastructure will take time. Hybrid electric vehicles can achieve energy saving and emission reduction even with existing charging facilities, which is a more realistic and feasible solution at present. Therefore, major car companies have launched or are developing their own hy...

AI Technical Summary

Problems solved by technology

If at this time, when a large driving force is required at the wheel end, in order to meet the driving demand of the wheel end, the generator will work in an overload state, causing the temperature of the generator to be too high, the life of the generator is attenuated, or the temperature of the generator is too high to reduce power driving, unable to meet the continuous wheel-end drive needs of the car

In the parallel driving mode, the engine and the drive motor are driven simultaneously, the power battery supplies electric energy to the drive motor, and the drive motor converts electric energy into mechanical energy and outputs it to the wheel end to meet the long-term climbing requirements of the wheel end. The battery will be in a state of long-term discharge, which may cause the power battery to lose power, and cannot provide the power required to meet the continuous drive of the car wheel end

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