Double clutch hybrid power machine AMT speed-changer executing mechanism and control method

Abstract

The invention discloses an actuating mechanism of an AMT transmission of a double clutch hybrid vehicle, comprising the actuating mechanism of a front clutch, the actuating mechanism of a back clutch, a gear select actuating mechanism, a gear shift actuating mechanism, a control unit, a hydraulic oil circuit and an attachment unit; the actuating mechanism of the front clutch comprises a control oil cylinder of the front clutch, the piston rod of which is connected with the front clutch, a front proportional flow electromagnetic valve, which is communicated with the oil sump of the control oilcylinder of the front clutch, and a front clutching position sensor, which is arranged on the control oil cylinder of the front clutch to check and output the position signal of the front clutch; after starting, the status of the entire vehicle is confirmed according to every sensor signal; when recovering braking energy, the control signal of the actuating mechanism of the front clutch is output; when shifting, the control signals of the actuating mechanism of the back clutch, the gear select actuating mechanism and the gear shift actuating mechanism are output; when entering into other working conditions, the control signals corresponding to the working conditions are output. The invention also discloses a control method of the actuating mechanism of the AMT transmission of the double clutch hybrid vehicle.

Description

technical field [0001] The invention relates to a transmission system of a hybrid electric vehicle, in particular to an actuator of an AMT transmission of a double-clutch hybrid electric vehicle and a control method thereof. Background technique [0002] As international crude oil prices continue to hit new highs, record gasoline prices have caused most consumers to turn their attention to the issue of fuel consumption that has been neglected. At present, among many new energy vehicle solutions, only hybrid vehicles have been successfully industrialized. Hybrid vehicles generally use gasoline drive and electric drive. The advantage is that when the vehicle starts and stops, it is only driven by the generator; the engine does not work until it reaches a certain speed; In the best working condition, it has good power and low emissions; moreover, the source of electric energy is the engine, and only need to refuel. [0003] As a new energy-saving and environment-friendly vehi...

AI Technical Summary

Problems solved by technology

[0007] This kind of executive mechanism has the defects of slow engagement and disengagement speed of the front clutch: in hybrid vehicles, in order to recover the braking energy of the whole vehicle to the greatest extent, it is required that the front clutch can be engaged and disengaged smoothly and quickly; however, in the above-mentioned actuator Among them, the engagement and disengagement of the front clutch are driven by the motor; and the speed of the motor is relatively slow (under the same volume, the power of the electrical device is about 1 / 2 of that of the hydraulic device), which leads to the slow engagement and disengagement speed of the front clutch, which cannot meet the requirements of the whole system. Requirements for energy recovery from vehicle braking

[0008] In addition, this kind of executive mechanism also has defects in terms of power system, occupied volume, manufacturing cost, etc.: In hybrid electric vehicles, only by realizing the comprehensive control of the power system (engine, automatic transmission) can the advantages of hybrid electric vehicles be maximized , and then improve the performance of the vehicle, but when using the above-mentioned actuator, the gear shift is controlled by the driver, and the gear position of the transmission cannot be reasonably selected according to the vehicle information such as the running state of the engine and the vehicle speed, which will easily cause the engine to stall and power The comprehensive control and optimization of the power system cannot be realized due to the consequences of performance degradation and economical deterioration; due to the large number of components of the actuator, it needs to occupy a large space in the front cabin of the car, and the front cabin of the hybrid vehicle is inherently compact, increasing After the execution mechanism, the entire front cabin is more crowded; at the same time, it is also very expensive and time-consuming to develop components such as the front clutch drive motor, worm gear reducer, and electronic control unit that meet the requirements of hybrid vehicles, thus increasing the manufacturing cost. cost

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