Dual-motor hybrid power assembly with reducer module

Abstract

The invention discloses a dual-motor hybrid power assembly with a reducer module. The dual-motor hybrid power assembly comprises an engine, an elastic damping connector, a first motor, a single disk clutch, a second motor and the reducer module which are coaxially connected in sequence. The reducer module is connected with a drive axle assembly body. An energy storage power source is connected with a first motor controller, a second motor controller and a vehicle controller. The first motor controller is further connected with the vehicle controller and the first motor. The second motor controller is further connected with the vehicle controller and the second motor. According to the single disk clutch of the dual-motor hybrid power assembly, no axial force is produced on the motors and the engine by the single disk clutch, disengaging and engaging are rapid, sliding friction combination can be conducted for a long time, losses and the axial size are small, the transmitted torque power is large, and the characteristics of overload protection and low cost are achieved. The impact strength of the second motor to all main parts of a chassis is effectively reduced or eliminated by the reducer module. The engine and the energy storage power source can switch energy output according to the working condition, energy recovery and optimal configuration of the complete machine are achieved, and the performance is effectively improved.

Description

Technical field [0001] The invention relates to the technical field of new energy vehicles, in particular to a dual-motor hybrid power assembly with a reducer module suitable for new energy vehicles. Background technique [0002] With the continuous development of society and vehicle engineering technology, the number of vehicles has become larger and larger. The energy consumption and exhaust emissions of the vehicles during the use of vehicles are highly valued by all sectors of society. More and more countries and regions have introduced incentive policies for the development of new energy vehicles. In particular, the use of powertrains in large commercial vehicles plays an important role in actively promoting the development of new energy vehicles and related supporting industries and technologies. The technical routes currently adopted on the market are mainly hybrid technology and pure electric technology. Whether it is hybrid technology or pure electric technology, the tr...

AI Technical Summary

Problems solved by technology

Since the traditional hydraulic automatic transmission has a continuously working hydraulic pump, which consumes a lot of energy and cannot be dragged in reverse, it is no longer suitable for hybrid or pure electric vehicles

[0003] At present, three kinds of automatic clutches are mainly used in hybrid powertrains. One is the automatic clutch that separates or combines the dry clutch by pushing the shift fork release bearing through the cylinder; Technical problems such as short bearing life, complex control system, large structure volume, high machining accuracy, high failure probability, short life, and high maintenance cost

The second is an automatic clutch that realizes clutching by pushing multiple wet friction pairs through a hydraulic cylinder; however, there are technical problems such as large discharge resistance, low efficiency, complex hydraulic control components, and high maintenance costs with multiple wet friction pairs.

However, AMT has technical problems such as poor smoothness of shifting, inability to realize powerless intermittent shifting, long shifting time, complex control system, large structure volume, high machining accuracy, low reliability, and inability to realize semi-linkage drive.

[0004] For the main drive motor, due to the low speed and large torque demand, it will lead to large axial size, volume, weight, high cost, and large impact load on the chassis, especially due to the large moment of inertia of the motor rotor. Drive axle assembly, engine crankshaft, ISG motor, automatic clutch and elastic damping connector have very high impact strength, resulting in broken shaft of ISG motor, damage to elastic damping disc, premature wear of engine crankshaft bearing, and damage to rear axle main reducer gear Technical problems such as increased vibration and noise

[0005] Therefore, the above three types of clutches do not meet the overall performance matching requirements of the hybrid powertrain, resulting in technical problems such as low power transmission efficiency of the hybrid powertrain, poor energy management matching, and reduced vehicle performance.

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