A dual-state logic transmission and its shift process control method
A process control and transmission technology, applied in the direction of vehicle gearbox, transmission control, transmission, etc., can solve the problems of large shift shock and low power density, and achieve the purpose of reducing shift shock, reducing heat production, The effect of simplifying the structure
Active Publication Date: 2022-05-27
JILIN UNIV
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is to overcome the problems of low power density and large shifting impact of traditional planetary transmissions. According to the characteristics of high transmission efficiency of double internal meshing planetary transmissions, a two-state logic transmission is designed, and the Shift process control method of dual-state logic transmission
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[0039] In order to make the purpose, content and advantages of the present invention clearer, the specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.
[0040] see figure 1 , in order to solve the problems of the prior art, the present invention provides a dual-state logic transmission and a shift process control method thereof. The dual-state logic transmission includes a planetary row X1, a planetary row X2, a planetary row X3 and a planetary row X4, Planetary row X1, planetary row X2, planetary row X3 are all forward gear planetary rows, planetary row X4 is reverse gear planetary row, planetary row X1 includes sun gear S1, planetary gear P1, ring gear R1, planet carrier CA1, clutch C1 and Clutch C2, planetary row X2 includes sun gear S2, planetary gear P2, ring gear R2, planet carrier CA2, clutch C3 and clutch C4, planetary row X3 includes sun gear S3, planetary gear P3, ring gear R3, planet car...
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The invention discloses a two-state logic transmission and its shift process control method, which is characterized in that it includes four forward gear planetary rows and one reverse gear planetary row, each planetary row contains two clutches, when a single shift oil When the pressure is activated, one of the clutches is disengaged while the other clutch is engaged, forming a dual-state logic structure, which can increase the power density of the transmission and simplify the structure of the transmission hydraulic system; the shifting process of the dual-state logic transmission is divided into single hydraulic actuation For down shifting and combined oil pressure actuated down shifting, by analyzing the relationship between the torque capacity of the clutch and the oil pressure, taking the shifting time as the constraint condition, and taking the shifting impact and sliding friction work as the evaluation index, the single gear is optimized. The boost curve under oil pressure actuation and the depressurization curve under single oil pressure actuation, and through the combination of the two to determine the oil pressure curve group under combined oil pressure actuation, can significantly reduce the impact of shifting and reduce the friction work of the clutch , improve the shift quality of the vehicle.
Description
technical field [0001] The invention belongs to the technical field of transmission control, and more specifically, the invention relates to a dual-state logic transmission and a method for controlling a shifting process thereof. Background technique [0002] With the increasingly stringent laws and regulations on energy conservation and emission reduction of automobiles and the continuous improvement of electronic automatic control technology, the loading rate of automatic transmissions for vehicles has continued to increase in recent years. Automatic transmission control can reasonably increase or decrease gears and automatically adjust the optimal The engine working range can meet the driving requirements of the working conditions, which can significantly reduce the driver's work intensity, improve driving comfort and improve fuel economy. Among them, the hydraulic automatic transmission driven by planetary gears is the most widely used in passenger cars due to its smooth...
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IPC IPC(8): F16H3/62F16H61/02F16H61/06
CPCF16H3/62F16H61/0265F16H61/065F16H2200/006F16H2200/0082F16H2200/2012F16H2200/2051
Inventor 宋大凤梁伟智杜劭峰曾小华马涛杨丽丽陈建新段朝胜
Owner JILIN UNIV