Continuously variable transmission system with double-motor power uninterrupted gear shifting

Abstract

The invention discloses a continuously variable transmission system with double-motor power uninterrupted gear shifting. According to the system, an engine output shaft is connected with a flywheel, a Z1 driving gear and a driving disc of a main clutch at the same time; an input shaft of a gearbox is connected with a driven disc of the main clutch; a Zn driven gear is engaged with the Z1 driving gear while being connected with an input shaft of a generator; a Zd1 driving gear is connected with an output shaft of a motor; a Zd2 driven gear is engaged with the Zd1 driving gear while being connected with a C1 / C2 driving disc through a driving disc input shaft; a high-speed Zd3 driving gear is connected with a C1 driven disc; a low-speed Zd5 driving gear is connected with a C2 driven disc; a variable speed output shaft is connected with an output shaft of the gearbox , a low-speed Zd6 driven gear and a high-speed Zd4 driven gear at the same time; the output shaft of the gearbox is connected with the input shaft of the gearbox through a gear set of the gearbox, the high-speed Zd3 driving gear is meshed with the high-speed Zd4 driven gear, and the low-speed Zd5 driving gear is meshed with the low-speed Zd6 driven gear. Therefore, uninterrupted power can be provided in the gear shifting mode.

Description

technical field [0001] The invention relates to a novel CVT (continuously variable transmission) transmission system for road and non-road vehicles, in particular to a continuously variable transmission system with dual motors for continuous gear shifting. Background technique [0002] The existing on-road and non-road transmission systems are divided into manual shift system, power uninterrupted automatic shift system, stepless continuous CVT shift system, AT automatic transmission and AMT automatic transmission for commercial vehicles according to the shift mode. [0003] 1. Manual shift system: [0004] A shift system consisting of a manual shift lever, a shift shaft and a shift fork; when shifting, the system needs to disengage the main clutch, cut off the power of the gearbox input shaft, manually operate the gear selection and shift process, and need to stop and shift during operation. block. [0005] 2. Power uninterrupted automatic shift system: [0006] Refers to...

AI Technical Summary

Problems solved by technology

[0016] (1) Tractors with manual shifting drive trains need to stop and shift frequently to meet the traction and speed requirements of farm implements. The work intensity is high, the work efficiency is low, and the quality is unstable.

[0017] (2) The engine speed changes with the speed of the vehicle and cannot automatically shift gears, resulting in the engine not working in a stable and economical speed range, high fuel consumption, poor emissions, and large vibration wear

[0021] (1) The engine cannot run stably within the economical speed range. Although shifting without stopping has been realized, the engine speed has a wide range of changes, and the indicators such as fuel consumption, emissions, and vibration wear are poor.

[0022] (2) The transmission system structure requires a large number of clutches and proportional valves. With the increase of clutch wear, the shift control law will change with changes in clutch wear, operating environment temperature, and oil cleanliness; shift quality control less stable

[0023] (3) The traditional power shift gearbox, to achieve super crawling gear (0.2-0.4Km / h), needs to add multi-stage reduction gear train, and the structure is complex

[0024] (4) The key technology of the system is mastered by foreign companies and mainly depends on imports. The price of the transmission system is high and the maintenance cost is high

[0028] (1) The mechanical transmission system consisting of 4-6 gears is a transmission mechanism composed of multi-row planetary mechanisms and multiple wet clutches or brakes. The structure is complex and the cost is high

[0029] (2) The hydraulic power distribution system composed of hydraulic precision coupling parts has very high requirements on the cleanliness of use and maintenance, and the cost of use and maintenance is high

[0030] (3) Due to the manufacturing technology of these systems, the shift control software is basically mastered by foreign companies, and the products are mainly imported, and the cost is very high

[0034] Disadvantages: multi-row planetary mechanism plus multiple clutches and brakes are combined to realize multi-speed automatic transmission, with many parts, complex structure and low transmission efficiency

[0037] Disadvantages: Due to the use of power interruption to shift gears, the control accuracy of the shift control strategy and software is very high, the timing of shifting is difficult to control, and the smoothness of shifting is poor; under non-road conditions, due to the large driving resistance of the vehicle , the inertial speed decreases too fast, and the gear cannot be shifted normally for a long time, and the adaptability of the vehicle under non-road conditions is poor, so that it cannot be used

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