Hybrid structure for multi-axle heavy off-road vehicle

Abstract

The invention belongs to the technical field of vehicular power structures and discloses a hybrid structure for a multi-axle heavy off-road vehicle. The hybrid structure aims at heavy off-road vehicles with four or more axles and comprises a mechanical system, an electrical system and a control system. The mechanical system comprises an engine, an ISG (integrated starter generator) motor, a hydraulic automatic transmission, a transfer case assembly, a first main reducing gear set, a transmission shaft, a first hub reducer set, a traction motor set, a second main reducing gear set and a second hub reducer set; drive axles of the off-road vehicle include a first drive axle unit and a second drive axle unit; the engine and the ISG motor are connected with the hydraulic automatic transmission to form a first power source; the first power source is connected with the first hub reducer set sequentially through the transfer case assembly, the first main reducing gear set and the transmission shaft to drive wheels of the first drive axle unit; a second power source formed by the traction motor set is connected with the second hub reducer set sequentially through the second main reducing gear set to drive wheels of the second drive axle unit.

Description

technical field [0001] The invention relates to the technical field of vehicle power configuration, in particular to a hybrid configuration of a multi-axle heavy-duty off-road vehicle. Background technique [0002] In order to make full use of the ground adhesion and ensure the high passability of the vehicle, multi-axle off-road vehicles generally include more than three drive shafts. Most of these vehicles are combined with special equipment for fire protection, communication, command, lifting, oil drilling and other top-mounted special equipment for special purposes. Due to the harsh operating conditions of this type of equipment, it has a higher impact on the power and reliability of the vehicle. requirements. [0003] In the prior art, traditional heavy-duty special off-road vehicles basically use the engine as the sole power source. This structural feature determines that the basic configuration of the traditional power system can only be a simple structure of "engine...

AI Technical Summary

Problems solved by technology

In order to ensure the power of the vehicle, it can only be achieved by selecting a high-power engine. In daily use, the load rate of the engine is low, the fuel economy is poor, and it is not environmentally friendly.

In addition, limited by the domestic industrial level, high-power engines can only rely on imports

In order to ensure the all-wheel drive of multi-axle vehicles, a complex mechanical transmission system is used to distribute the power to each wheel. At the same time, because only the engine is used as a single power source, the vehicle cannot drive after the engine is paralyzed, and the reliability is not high.

[0004] In the existing technology, there is a mechanical coupling relationship between the bridges, and decoupling cannot be achieved. The driving force of each bridge is uniformly and centrally controlled, and the driving force cannot be flexibly allocated according to different working conditions.

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