Hybrid series dual-motor power shift transmission system

Abstract

The invention discloses a power shift transmission system of a hybrid power series double motor, a power shift transmission system of a hybrid power series double motor, which comprises a clutch output shaft, a first motor, a first motor shaft, a transmission Box input shaft, variable speed transmission group, gearbox output shaft, second motor, second motor hollow shaft, second motor transmission group, second power shaft, power shift clutch, power shift transmission group, automatic shift actuator , electric power conversion module and storage battery. The electric power of the battery is transmitted to the second motor through the electric power conversion module, and then converted into mechanical power by the second motor, and then transmitted to the central transmission by the hollow shaft of the second motor, the second motor transmission group, the second power shaft, and the power shift transmission group. The input shaft and the central transmission group finally reach the drive wheels, thus forming the shift power transmission route of the second electric motor. This enables uninterrupted power shifting of the vehicle from zero to maximum traction.

Description

technical field [0001] The invention relates to the field of road vehicles such as passenger cars and commercial vehicles, and the field of non-road vehicles whose power cannot be interrupted during traction operations, and in particular to a power shift gearbox system with hybrid series dual motors. Background technique [0002] Existing vehicle transmission systems are divided into manual transmissions, power uninterrupted automatic transmissions, and hydraulic-mechanical continuously variable transmissions (HMCVT) according to the speed change mode. [0003] 1. Vehicle power uninterrupted automatic transmission [0004] Refers to the gear shifting process completed under the condition that the power from the internal combustion engine to the driving wheel is not interrupted during the gear shifting process of the vehicle; wet multi-disc clutches, brakes, and multi-row planetary mechanisms are used as the gear shifting mechanism. , separate and brake different planetary r...

AI Technical Summary

Problems solved by technology

[0011] (1) The speed of the internal combustion engine in this gearbox is directly related to the speed of the vehicle. The change of vehicle speed leads to a large range of speed changes of the internal combustion engine. The internal combustion engine cannot work in a stable and economical speed range, resulting in high fuel consumption, poor emissions, and large vibration and wear.

[0012] (2) The gearbox structure requires a large number of clutches and proportional valves. With the increase of use time, the clutch wear increases, the shift control time changes, the ride comfort becomes poor, and shift shock occurs

[0013] (3) The traditional power shift gearbox system is a single-power route with a stepped transmission to achieve super crawling gear (ultra-low speed), and a lot of complicated reduction gear trains are required

Moreover, the stepless transmission during the main operation cannot be realized, that is, the optimal driving speed of the working tool cannot be matched theoretically.

[0014] (4) At present, the technologies of these systems are basically mastered by foreign companies and mainly rely on imports. The price of the gearbox is high, it is difficult to reduce the price, and the maintenance cost is high

[0016] (1) The mechanical transmission system consisting of 4-6 gears is a transmission mechanism composed of multi-row planetary mechanisms and 4-6 wet clutches or brakes. The structure is complex, the parts processing requirements are high, and the cost is high.

[0017] (2) The hydraulic power distribution system composed of hydraulic precision couplings has very high requirements for assembly cleanliness, use cleanliness, and maintenance cleanliness, and requires special hydraulic oil, which is expensive to use and maintain

[0018] (3) Since the technologies of these systems are basically mastered by foreign companies, the products mainly rely on imports, which are costly and difficult to reduce prices

[0019] The above-mentioned traditional gearbox has only one internal combustion engine single-power route. In order to pursue the acceleration performance at the start, a large-displacement internal combustion engine is required, which increases the purchase cost and reduces the operating economy.

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