A transmission selection and shift control method, control system and vehicle
A control method, a technology for selecting and shifting gears, which is applied in the direction of transmission control, components with teeth, belts/chains/gears, etc., which can solve the problems of inaccurate gear selection and shifting control and loud noises for gear selection and shifting, and achieve the realization of Functional safety level requirements, reduce shifting impact and noise, and ensure rationality
Active Publication Date: 2021-03-16
YIWU GEELY AUTOMATIC TRANSMISSION CO LTD +1
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- Application Information
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Problems solved by technology
[0004] An object of the present invention is to provide a transmission selection and shift control method to solve the problem of inaccurate selection and shift control in the prior art;
[0005] Another object of the present invention is to solve the problem of high gear shift noise in the prior art
Method used
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Embodiment Construction
[0064] figure 1 It is a schematic flowchart of a transmission selection and shift control method according to an embodiment of the present invention. The transmission selection and shift control method of this embodiment may include:
[0065] S10 obtains the rotational speed information of the power system of the transmission after receiving the gear selection request, and obtains the synchronization gradient required for the transmission gear selection according to the rotational speed information;
[0066] S20 calculates and obtains the theoretical value of the force, speed, time or position required to control the movement of the synchronizer during the transmission selection and shift process according to the synchronization gradient;
[0067] S30 controls the movement of the synchronizer through the gear selection motor actuator according to the synchronization gradient, and obtains the actual value of force, speed, time or position during the movement of the synchronize...
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The invention provides a transmission gear selecting and shifting control method and system and a vehicle and relates to the technical field of vehicle transmission mechanisms. The transmission gear selecting and shifting control method comprises the steps that after a gear selecting and shifting request is received, rotation speed information of a transmission power system is obtained, accordingto the rotation speed information, the synchronization gradient needed for gear selecting and shifting by the transmission is obtained; according to the synchronization gradient, the theoretical values of force, speed and time or position needed to control a synchronizer to move are calculated; according to the synchronization gradient, the synchronizer is controlled to move through a gear selecting and shifting motor execution mechanism, and the actual values in the motion process of the synchronizer are obtained; the actual values are compared with the theoretical values to judge whether theactual values meet the theoretical values or not; if the actual values does not meet the theoretical values, the synchronizer is controlled to conduct motion at the values close to the theoretical values in a next gear selecting and shifting process. The transmission gear selecting and shifting control method guarantees the completion reasonability of each gear shifting, lowers gear shifting impact and noise, achieves functional safety level requirement and guarantees gear shifting to be safely completed.
Description
technical field [0001] The invention relates to the technical field of vehicle transmission mechanisms, in particular to a transmission selection and shift control method, a control system and a vehicle. Background technique [0002] The gear shifting system consists of a gear selector motor actuator, a shift fork, a synchronizer, and a driven gear combined with teeth to transmit and mesh with each other, so as to realize the switching of different gears of the transmission. The gear selection and shift motor actuator implements gear selection and gear shifting respectively through two motors. The fingers of the shift actuator control the movement of the different gear forks. The shift fork pushes the gear sleeve of the synchronizer to move forward, and then engages with the combined teeth of the driven gear, and transmits the torque and speed of the engine end to the input shaft. Through the meshing of the driving gear and the driven gear, the output torque and speed are s...
Claims
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IPC IPC(8): F16H63/00
CPCF16H63/00F16H2710/04
Inventor 郭润泽
Owner YIWU GEELY AUTOMATIC TRANSMISSION CO LTD