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A two-speed automatic transmission control system and method
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A technology of automatic transmission and gearbox, which is applied in the direction of control drive, electric vehicle, electric energy management, etc., and can solve the problems of changing speed ratio and low motor operation efficiency
Active Publication Date: 2021-08-31
CHERY AUTOMOBILE CO LTD
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[0005] A pure electric vehicle equipped with a transmission device with a fixed speed ratio cannot change the speed ratio according to different actual working conditions (such as heavy load acceleration, high-speed battery life), thus resulting in low motor operation efficiency
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Embodiment 1
[0065] This embodiment provides a two-speed automatic transmission control system, such as figure 1 As shown, the system includes a vehicle controller 101, a motor controller 102 and a gearbox controller 103, wherein:
[0066] The biggest difference between an automatic transmission and a manual transmission is that the automatic transmission can automatically judge whether the vehicle meets the trigger conditions for shifting according to the current state of the vehicle, and automatically execute the shift action when the trigger conditions for shifting are met, while the manual transmission requires the driver to judge whether the vehicle is Satisfy the shift trigger condition and manually execute the shift action when the shift trigger condition is met.
[0067] The operation of automatically judging whether the vehicle satisfies the shift trigger condition according to the current state of the vehicle is performed by the vehicle controller 101 .
[0068] The vehicle cont...
Embodiment 2
[0128] On the other hand, an embodiment of the present invention provides a method for controlling a two-speed automatic transmission, such as image 3 As shown, steps S201, S202, S203, S204, S205, S206, S207, S208, S209, S210, S211, S212, S213 and S214 are included, wherein:
[0129] The biggest difference between an automatic transmission and a manual transmission is that the automatic transmission can automatically judge whether the vehicle meets the trigger conditions for shifting according to the current state of the vehicle, and automatically execute the shift action when the trigger conditions for shifting are met, while the manual transmission requires the driver to judge whether the vehicle is Satisfy the shift trigger condition and manually execute the shift action when the shift trigger condition is met.
[0130] The operation of automatically judging whether the vehicle satisfies the shift trigger condition according to the current state of the vehicle is performed b...
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Abstract
Embodiments of the present invention provide a two-speed automatic transmission control system and method, which relate to the technical field of new energy vehicles. And determine the target speed, use the motor controller to perform torque unloading and motor speed regulation operations, use the gearbox controller to perform shift and shift operations, and use the vehicle controller, motor controller and gearbox controller to perform operations. The interaction and coordination enable the vehicle to shift smoothly and quickly even after the clutch is omitted, and the speed ratio can be changed according to the actual working conditions of the vehicle, which improves the operating efficiency of the drive motor of the pure electric vehicle.
Description
technical field [0001] The invention belongs to the technical field of new energy vehicles, and in particular relates to a two-speed automatic transmission control system and method. Background technique [0002] Affected by the global energy crisis and environmental pollution, countries are constantly promoting the development of the new energy vehicle industry, especially in the past 10 years, pure electric vehicles and hybrid vehicles have made great progress, and products and technologies are constantly improving. progress and perfection. [0003] Compared with traditional internal combustion engine vehicles, pure electric vehicles have an ideal torque-speed characteristic curve of their motors. Therefore, many pure electric vehicles at home and abroad are equipped with variable speed ratios with fixed speed ratios in order to reduce costs and simplify the vehicle structure. device. [0004] In the process of implementing the embodiments of the present invention, the i...
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Application Information
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