Dual-motor multi-mode hybrid power driving system and control method thereof

Abstract

The invention relates to a double-motor multi-mode hybrid power driving system and a control method thereof. The double-motor multi-mode hybrid power driving system comprises an engine, an ISG (integrated starter and generator) motor, a main motor, a vehicle-mounted energy source, a drive axle, wheels, a normally closed clutch (2) and a clutch (4), wherein the output end of the engine is directly connected with the input end of the ISG motor through the normally-closed clutch (2); an output shaft of the ISG motor is connected with a driving disc of the clutch (4); a driven disc of the clutch (4) is connected with an input shaft of the main driving motor; the output shaft of the main driving motor is connected with the wheels through the drive axle; and the vehicle-mounted energy source is connected with the ISG motor and the main driving motor. When the double-motor multi-mode hybrid power driving system works, no transmission case is needed for speed change, the high-power main motor is used for direct drive starting, the drive axle is used for directly driving the wheels, and therefore the energy loss is reduced; and in addition, the engine and the ISG motor are directly connected by the normally-closed clutch, and the engine and the ISG motor are integrated with the main motor into a whole, and therefore the double-motor multi-mode hybrid power driving system is more compact in structure and reduced in system cost.

Description

technical field [0001] The invention relates to a dual-motor multi-mode hybrid drive system and a control method thereof. Background technique [0002] According to the current oil extraction and proven reserves, people are becoming more and more aware of the approaching energy crisis, and are also troubled by the environmental pollution caused by the use of oil. time theme. Automobiles, which are closely related to people's lives and are also one of the main causes of energy shortage and environmental pollution, have begun to develop in the direction of energy conservation and environmental protection. Therefore, new energy vehicles, mainly pure electric vehicles, hybrid vehicles and fuel cell vehicles, have been adopted. More and more use. However, restricted by the development of batteries and electric motors, pure electric vehicles with almost zero pollution will not be widely popularized due to insufficient power. Hybrid power provides a direction to fill this gap. A...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a dual-motor multi-mode hybrid drive system and its control method to solve the problems of poor energy-saving effect, complex structure and high cost of existing hybrid drive systems

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