Driving system and control method thereof for four-wheel-drive hybrid vehicle

Abstract

The invention aims to provide a driving system and a control method thereof for a four-wheel-drive hybrid vehicle which has high horsepower and higher fuel economical efficiency. The driving system comprises a power battery, a front driving unit, a rear driving unit and an entire vehicle controller for controlling the front driving unit and the rear driving unit to work, wherein the key points are that the front driving unit comprises an engine arranged on a front driving axle and a front axle ISG motor and a front speed reducer connected with the engine through a driving device, the rear driving unit comprises a rear axle ISG motor arranged on a rear driving axle and a rear speed reducer connected with the rear axle ISG motor through the driving device, the front axle ISG motor and the rear axle ISG motor are electrically connected with the power battery through an inverter respectively, and the ratio of the peak power of the front axle ISG motor to the rated power of the engine is over 40 percent. The driving system has a simple mechanical structure and less power loss, can improve the fuel economical efficiency of the vehicle while ensuring the dynamic property, and accord with the modern energy saving and environmental protection trend.

Description

technical field [0001] The invention belongs to the technical field of hybrid electric vehicles, in particular to a four-wheel drive hybrid electric vehicle. Background technique [0002] Although the traditional four-wheel drive vehicle has high horsepower and good off-road performance, its mechanical structure is very complicated, its transmission efficiency is relatively low, and its fuel consumption is high, which runs counter to the current trend of energy saving and environmental protection. The fuel economy represents the development direction of modern automobiles. How to combine the two to create a four-wheel drive hybrid vehicle with high horsepower and high fuel economy has become the direction of efforts of automobile manufacturers. Contents of the invention [0003] The first object of the present invention is to propose a drive system for a four-wheel drive hybrid vehicle with high horsepower and high fuel economy. [0004] The driving system of the four-whe...

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Problems solved by technology

[0002] Although the traditional four-wheel drive vehicle has high horsepower and good off-road performance, its mechanical structure is very complicated, its transmission efficiency is relatively low, and its fuel consumption is high, which runs counter to the current trend of energy saving and environmental protection. The fuel economy represents the development direction of modern automobiles. How to combine the two to create a four-wheel drive hybrid vehicle with high horsepower and high fuel economy has become the direction of the efforts of automobile manufacturers.

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