Powertrain and vehicle having same
A technology of power transmission system and transmission components, which is applied in the field of vehicle transmission, can solve the problems of the overall efficiency to be improved, the fuel economy of the whole vehicle, and the loss, and achieve the best fuel economy, simple and compact structure, and high fuel economy Effect
Active Publication Date: 2019-06-07
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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[0036] 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.
[0037] Refer below Figure 1-Figure 26 A power transmission system 1000 according to an embodiment of the present invention is described. A power transmission system 1000 according to an 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 a power output portion 300.
[0038] The first planetary gear mechanism P1 includes three first transmission elements, namely the sun gear 5 , the planet carrier 7 and the ring gear 8 . The first of the three first transmission elements is rigidly connected to...
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The invention discloses a power transmission system and a vehicle provided with the same. The power transmission system comprises an engine, a power input shaft, 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 a sun wheel of the first planetary gear mechanism performs synchronous rotation with a rotor of the first electric power generator, a planetary carrier of the first planetary gear mechanism is in rigid connection with the power input shaft and is selectively synchronous with the rotor of the first electric power generator, a gear ring of the first planetary gear mechanism is in rigid connection with a planetary carrier of the second planetary gear mechanism and is selectively synchronous with the rotor of the second electric power generator, a sun wheel of the second planetary gear mechanism is in rigid connection with a rotor of the second electric power generator, and a gear ring of the second planetary gear mechanism 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 can keep good fuel economy under the different working conditions.
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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IPC IPC(8): B60K6/44B60K6/365
CPCY02T10/62
Inventor 凌和平翟震徐友彬罗永孟
Owner BYD CO LTD