Power transmission system and vehicle provided with same
A technology of a power transmission system and a power input shaft, which is applied in the field of vehicle transmission, can solve the problems of declining fuel economy of the whole vehicle, the overall efficiency needs to be improved, and the loss is large, and achieves the best fuel economy, simple and compact structure, and fuel economy. high effect
Active Publication Date: 2017-03-08
BYD CO LTD
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Problems solved by technology
[0002] In related technologies, in the power transmission system of a hybrid vehicle, the overall efficiency of the system needs to be improved, and excellent fuel economy cannot be achieved under different working modes. In low-to-medium speed conditions to obtain higher transmission efficiency, while in high-speed conditions, the engine power needs to supplement the system and needs to undergo two conversions to output to the wheels, resulting in a large loss; in the series-parallel hybrid mode, in order to ensure the The high efficiency will lead to the trend of large-scale motor generators. At the same time, in this mode, under high-speed working conditions, there is a disadvantage of high-power electric circulation, which will cause the fuel economy of the whole vehicle to decline under this working condition. room for improvement
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[0037] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0038] Refer below Figure 1-Figure 14 A power transmission system 1000 according to an embodiment of the present invention is described, as Figure 1-Figure 12 As shown, the power transmission system 1000 according to the embodiment of the present invention includes an engine 200, a power input shaft 1, a first motor generator MG1, a second motor generator MG2, a first planetary gear mechanism P1, a second planetary gear mechanism P2 and The power output unit 300.
[0039] Such as Figure 1-Figure 14 As shown, the crankshaft of the engine 200 is connected to the power input shaft 1 to output the power of the engine 200 to the power input shaft 1 , and the cra...
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The invention discloses a power transmission system and a vehicle provided with the same. The vehicle includes the power transmission system. The power transmission system is characterized by comprising an engine, a power input shaft connected with the engine, a first planetary gear mechanism, a second planetary gear mechanism, a first electric power generator, a second electric power generator and a power output part, wherein the first electric power generator can be connected with the power input shaft, a sun wheel of the first planetary gear mechanism is in rigid connection with the power input shaft, and one of a gear ring and a planetary carrier of the first planetary gear mechanism is in rigid connection with a rotor of the first electric power generator. A sun wheel of the second planetary gear mechanism is in rigid connection with the other of the gear ring and the planetary carrier of the first planetary gear mechanism and can be connected with the second electric power generator, one of a gear ring and a planetary carrier of the second planetary gear mechanism is rigidly connected to the second electric power generator, and the other of the gear ring and the planetary carrier is in linkage with the power output part to output power. According to the embodiment of the invention, the power transmission system has multiple working modes to adapt to different working conditions and keeps good fuel economy.
Description
technical field [0001] The invention relates to the technical field of vehicle transmission, in particular to a power transmission system and a vehicle with the power transmission system. Background technique [0002] In related technologies, in the power transmission system of a hybrid vehicle, the overall efficiency of the system needs to be improved, and excellent fuel economy cannot be achieved under different working modes. In low-to-medium speed conditions to obtain higher transmission efficiency, while in high-speed conditions, the engine power needs to supplement the system and needs to undergo two conversions to output to the wheels, resulting in a large loss; in the series-parallel hybrid mode, in order to ensure the The high efficiency will lead to the trend of large-scale motor generators. At the same time, in this mode, under high-speed working conditions, there is a disadvantage of high-power electric circulation, which will cause the fuel economy of the whole ...
Claims
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Inventor 徐友彬翟震罗永孟凌和平
Owner BYD CO LTD