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Shift mechanism, shift system and shift control method of automatic transmission

A technology for shifting motors and controllers, which is applied in the direction of transmission control, mechanical equipment, and components with teeth, etc. It can solve the problems of cumbersome shifting process, complex mechanism structure, and difficult maintenance, so as to maintain performance and improve The effect of compact structure and strong versatility

Active Publication Date: 2019-11-29
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above analysis, the present invention aims to provide a shifting mechanism, a shifting system and a shifting control method of an automatic transmission, which solves the problem that the shifting process of the shifting mechanism in the prior art is cumbersome, and there are problems that are contrary to the intention of the driver. The situation, the complex structure of the mechanism, and the difficulty of maintenance

Method used

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  • Shift mechanism, shift system and shift control method of automatic transmission
  • Shift mechanism, shift system and shift control method of automatic transmission
  • Shift mechanism, shift system and shift control method of automatic transmission

Examples

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Embodiment 1

[0046] This embodiment provides a shift mechanism of an automatic transmission, such as Figure 1 to Figure 6 As shown, it includes a shift lever 1, a screw thrust rod 2 and a shift motor 3. Wherein, one end of the shift rod 1 is fixedly connected with the shift shaft 5 on the box body 4 of the automatic transmission, and the other end of the shift rod 1 is inserted into the helical thrust rod 2, and slides up and down in the helical thrust rod 2 ; One end of the helical thrust rod 2 is threadedly connected with the output shaft of the gearshift motor 3, and the rotation of the output shaft of the gearshift motor 3 is converted into the helical thrust rod 2 and moves linearly from side to side through the thread.

[0047] When shifting is required, the shift motor 3 is driven, and the output shaft of the shift motor 3 rotates relative to the helical thrust rod 2, and the number of threads engaged with each other changes, converting the rotational motion of the output shaft of ...

Embodiment 2

[0062] This embodiment provides a shift system, such as Figure 7 As shown, it includes a displacement sensor 11, a shift actuator 12, a shift controller and the shift mechanism provided in Embodiment 1, and the shift actuator 12 includes a vehicle speed comparator. Wherein, the gearshift actuator 12 is electrically connected with the displacement sensor 11, the gearshift controller and the gearshift motor 3 respectively; the gearshift controller sends the desired logical gear position to the gearshift actuator 12; connection, used to obtain the actual position signal of the screw thrust rod 2, and transmit it to the gear shift actuator 12; the gear shift actuator 12 converts the received actual angle value of the screw thrust rod 2 into an actual logical gear value, and the gear shift is executed The device 12 receives the current vehicle speed value, and judges whether the current vehicle speed is 0 through the vehicle speed comparator. The control strategy determines the r...

Embodiment 3

[0069] This embodiment provides a shift control method for a shift system, such as Figure 8 shown, including the following steps:

[0070] Step 1: The shift actuator receives the expected logical gear value sent by the shift controller. Specifically, in the manual driving mode, the gear shift actuator receives the expected logical gear value sent by the driver through the electric control handle; in the automatic driving mode, the gear shift actuator Expected logical gear value;

[0071] The shift actuator obtains the actual position signal of the shift lever collected by the displacement sensor, and obtains the actual logical gear value through analysis.

[0072] Step 2: The gear shift actuator judges whether the expected logical gear value and the actual logical gear value are equal, if they are equal, the gear will not be shifted; if not, then go to step 3;

[0073] Step 3: The shift actuator receives the current vehicle speed signal, and judges whether the current vehi...

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Abstract

The invention discloses a gearshift mechanism, a gearshift system, and a gearshift control method for an automatic transmission, belongs to the technical field of automatic driving, and solves the problems of cumbersome gearshift process, the case of intention opposite to the intention of a driver, complex structure, and high maintenance difficulty of a gearshift mechanism in the prior art. The gearshift mechanism comprises a gearshift shifting rod, a spiral thrust rod and a gearshift motor, wherein one end of the gearshift shifting rod is fixedly connected with a gearshift shaft on the body of the automatic transmission, and the other end of the gearshift shifting rod is inserted into the spiral thrust rod, and slides in the spiral thrust rod up and down; and one end of the spiral thrustrod is in thread rotation connection with the output shaft of the gearshift motor, and the rotation of the output shaft of the gearshift motor is converted to the left-right rectilinear movement of the spiral thrust rod through a thread. The gearshift mechanism can be used for automatic gearshift of the automatic transmission.

Description

technical field [0001] The invention relates to an automatic driving system, in particular to a shift mechanism, a shift system and a shift control method of an automatic transmission. Background technique [0002] An automatic transmission is a transmission device that can automatically change gears according to the engine speed. In recent years, the popularity of autonomous driving technology has continued to heat up, and more and more attention has been paid to autonomous vehicles using automatic transmissions. This is because such vehicles do not need to pay attention to the switching logic of gear shifting, and only need to realize the control of accelerator and brake. The longitudinal vehicle speed control of the vehicle can be completed. [0003] However, even if an automatic transmission is used, the automatic driving system of the self-driving vehicle still needs to perform electronic control switching of the logical gear position of the automatic transmission, oth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H59/08F16H61/02F16H61/32
CPCF16H59/08F16H61/0213F16H61/32F16H2061/0218F16H2061/326
Inventor 陈慧岩王威陈舒平李昊
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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