A Longitudinal Rear Drive Planetary Gear Automatic Transmission

An automatic transmission and planetary gear technology, which is applied in the field of vehicle transmissions, can solve the problems of large speed ratio of the first gear of the forward gear, difficult shifting control, and poor shifting quality, etc., and achieves a wide range of speed ratios and light frustration. , the effect of economic improvement

Active Publication Date: 2021-10-01
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the planetary gear transmission of this scheme has only one reverse gear, and the first gear speed ratio of the forward gear is very large, which is difficult to use in normal driving conditions.
Moreover, the step ratio between 1st gear and 2nd gear is particularly large, resulting in poor shifting quality and difficulty in shifting control

Method used

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  • A Longitudinal Rear Drive Planetary Gear Automatic Transmission

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Embodiment Construction

[0023] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0024] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0025] Such as figure 1 As shown, a longitudinal rear-drive planetary gear automatic transmission includes: shifting elements, five planetary gear sets, eight rotating shafts, and a box body, wherein,...

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Abstract

The invention discloses a longitudinal rear drive planetary gear automatic transmission, which adopts 5 negative sign planetary gear sets, 8 rotating shafts, 7 shift elements, including 2 clutches, 5 brakes, and 5 brakes nested Planetary gear set arrangement, 2 clutches are located at the front of the transmission, and the structural layout is more compact. In the present invention, each gear position closes 2 shifting elements, 11 forward gears and 2 reverse gears can be realized, and as the number of gears increases, a wider speed ratio range and a more uniform transmission step ratio can be obtained .

Description

technical field [0001] The invention belongs to the technical field of vehicle gearboxes, and relates to a multi-speed planetary automatic gearbox, in particular to a longitudinal rear drive planetary automatic gearbox for a vehicle transmission system. Background technique [0002] The more gears the mechanical automatic transmission has, the better the fuel economy, power and comfort of the car. The more the number of gears, the closer the transmission ratio between the gears, the smaller the change of the transmission status before and after the gear shift, the smoother the gear shifting, the reduced impact feeling, and the enhanced driving comfort; The more gears, the engine can work in a high-efficiency range under more complicated working conditions, and the relative fuel consumption will be lower; the more gears, the first gear will have a larger transmission ratio, and a larger torque can be obtained. Due to the energy crisis and environmental problems, the general ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H3/62F16H3/70F16H57/023F16H57/08
CPCF16H3/62F16H3/70F16H57/023F16H57/082F16H2200/0073F16H2200/0086F16H2200/2015F16H2200/2048
Inventor 董鹏盛家东徐向阳王书翰刘艳芳郭伟
Owner BEIHANG UNIV
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