Parallel type vehicle oil electric mixed dynamic system

Abstract

The invention discloses a parallel automotive oil-electric hybrid power system, which comprises an engine, a motor, and a gearbox; and the main improvement comprises: one end of a motor shaft is connected with a shaft of the engine through an unidirectional clutch and a torque limiting clutch, the other end of the motor shaft is connected with an input shaft of the gearbox, and an output shaft of the gearbox is connected with a driving shaft of wheels. The system only needs to control the action of the coupling of the torque limiting clutch or a three-shift clutch when starting the engine during the driving, so as to simplifies control process, and greatly shortens starting time (the time is only between 0.3 and 0.4 second and is shortened for 2 to 4 times compared with the prior art); at the same time, during the starting, a main clutch does not need to be disconnected and the power output of the motor is still maintained, so that a vehicle is steady and the driving performance of the vehicle can not be reduced. The invention uses an intelligent controller to realize various functions of the oil-electric hybrid system and ensure that the system has good driving performance. The system also has the advantages of simple structure, light additional weight, small volume and low cost.

Description

technical field [0001] The invention relates to an oil-electric hybrid power system, in particular, the invention relates to a parallel oil-electric hybrid power system. Background technique [0002] In the prior art, the parallel gasoline-electric hybrid system mainly couples the torque output by the engine and the torque output by the motor mechanically, so that the motor can assist the engine to mechanically boost the vehicle. The simplest parallel system is to connect the motor shaft to the output shaft of the engine, and then connect to the transmission through the clutch in the transmission. This system only uses one motor, has simple structure, high energy transfer efficiency, light additional weight, small volume and low cost. However, since the motor shaft is connected to the engine shaft, both of them always work at the same time, so that the system cannot realize the pure electric driving condition, which limits the function and energy saving of the system. [0...

AI Technical Summary

Problems solved by technology

However, there is a problem in this system: the system needs to complete many steps when starting the engine while driving, and the control is complicated. figure 1 , that is to first separate the main clutch 15, then control the motor to decelerate to zero speed, then control the clutch 17 to couple, then accelerate the motor to drive the engine shaft to rotate, after the engine starts, then couple the main clutch 15

The whole process takes about 1 to 2 seconds, and during this period, the system has no power output, and the occupants have a clear feeling, which reduces the driving performance of the vehicle.

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