Hybrid power driving system and driving method thereof

Abstract

The invention relates to a hybrid power driving system and a driving method thereof. The driving system comprises an engine, a first clutch, a first motor, a second motor, a second clutch, an energy storing device and a reducing mechanism, wherein the engine is connected with the reducing mechanism through the first clutch; the energy storing device is electrically connected with the first motor and the second motor respectively; the second motor is connected with the reducing mechanism; and the engine is connected with the first motor through the second clutch. The driving method comprises the step of controlling the driving system in a pure electric working condition, a series working condition, a parallel series working condition, a three-power-source working condition, an engine working condition or a braking working condition according to the required power of the driving system and the energy storage state of the energy storing device. The driving system provided by the inventionhas a simple structure, and the driving method mainly uses motor drive and can flexibly control the driving system in a plurality of working modes so as to satisfy the needs of actual driving.

Description

technical field [0001] The invention relates to a hybrid driving system and a driving method thereof. Background technique [0002] At present, due to its excellent performance in energy saving and environmental protection, hybrid electric vehicles have gradually become the development direction of the automobile industry. A kind of hybrid drive system is disclosed in CN1118387C, such as figure 1 As shown, it includes an engine 1, a generator 3 connected to an output shaft 2 of the engine 1, a battery 4 for storing electric power generated by the generator 3, an electric motor 5 driven by the battery 4, and an output shaft 2 of the engine 1 The connected power transmission mechanism 11, and the reduction gear 6 connected with the electric motor 5 and the power transmission mechanism 11, the output of the reduction gear 6 will finally be transmitted to the wheels. [0003] The driving method of the above-mentioned driving system is that during the normal running of the vehi...

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Problems solved by technology

[0004] However, in the above-mentioned driving system, on the one hand, the power transmission mechanism 11 for transmitting the power of the engine 1 to the reduction gear 6 has a complex structure, including not only a clutch, but also a torque converter and another reduction gear, so The structure of the entire drive system is complicated, which not only brings inconvenience to the overall arrangement of the system, but also increases the weight of the vehicle body; on the other hand, the engine 1 and the generator 3 are directly connected together, and when the engine 1 alone drives the wheels The generator 3 is idling, so there will be a certain energy loss

In addition, the driving mode of the drive system is single, and the effective utilization rate of energy is low, which cannot meet the power requirements of various complex working conditions when the vehicle is actually driving.

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