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Calculation method and shifting method of continuous speed ratio of dual-clutch gearbox

A technology of dual-clutch gearbox and calculation method, which is applied to components with teeth, transmission control, belt/chain/gear, etc. Effect

Active Publication Date: 2022-04-26
GUANGZHOU AUTOMOBILE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a calculation method and a shifting method for the continuous speed ratio of a dual-clutch gearbox, which solves the problem that the target torque of the power source calculated by the wheel-end demand torque exists due to the step of the speed ratio before and after the shift of the dual-clutch gearbox. mutation, causing problems such as vehicle movement

Method used

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  • Calculation method and shifting method of continuous speed ratio of dual-clutch gearbox
  • Calculation method and shifting method of continuous speed ratio of dual-clutch gearbox
  • Calculation method and shifting method of continuous speed ratio of dual-clutch gearbox

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Embodiment 1

[0038] This embodiment provides a method for calculating the continuous speed ratio of a dual-clutch gearbox, including the following steps:

[0039] A1. Obtain the current gear signal value of the gearbox;

[0040] A2. Obtain the vehicle speed value and the accelerator pedal opening value, and convert the target gear signal value of the desired gear according to the vehicle speed value and the accelerator pedal opening value;

[0041] In this step, the method for converting the target gear signal value of the desired gear includes: using the vehicle speed as the abscissa and the accelerator pedal opening as the ordinate to establish a shift table, and querying the gear shift table according to the vehicle speed and the accelerator pedal opening value. The above shift table is used to obtain the target gear signal value of the desired gear. The table exchange described in this embodiment is, for example, figure 1 shown.

[0042] figure 1 Among them, the numbers 11-16 are t...

Embodiment 2

[0056] This embodiment provides a method for shifting gears with a continuous speed ratio of a dual-clutch gearbox. The gearbox is connected to a vehicle controller and includes the following steps:

[0057]B1. When the gearbox enters the shift process, the gearbox will send the shift process flag signal to the vehicle controller to set, and the vehicle controller confirms that the shift process flag is indeed set, then According to the calculation method described in any one of the above, the continuous speed ratio of the gearbox shifting is obtained;

[0058] B2. The vehicle controller calculates the power target torque of the vehicle power source by applying the continuous speed ratio obtained in step B1 according to the wheel end target torque;

[0059] B3. The vehicle controller controls the power source to output torque with the power target torque.

[0060] The power source includes an engine or an electric motor.

[0061] In this embodiment, the method for the vehicl...

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Abstract

The present invention provides a calculation method and a shifting method for the continuous speed ratio of a dual-clutch gearbox, which solves the problem that the target torque of the power source calculated by the wheel-end demand torque exists due to the step of the speed ratio before and after the shift of the dual-clutch gearbox. Mutations, causing problems such as vehicle movement. The calculation method includes: A1. obtaining the current gear signal value of the gearbox; A2. obtaining the vehicle speed value and the accelerator pedal opening value, and converting the target gear signal of the desired gear according to the vehicle speed value and the accelerator pedal opening value value; A3. Judging whether the gearbox starts to enter the shifting process; if the gearbox starts to enter the shifting process, judge whether the shifting process is upshifting or downshifting, and calculate the continuous speed ratio through the continuous speed ratio algorithm; A4. If the shifting Completed, the gearbox exits the shifting process, then the target gear value after the shift is completed is used as the initial value for the next calculation of the continuous speed ratio algorithm; A5. Output the calculated continuous speed ratio value.

Description

technical field [0001] The invention relates to a shifting method of a dual-clutch gearbox, in particular to a calculation method and a shifting method for a continuous speed ratio of a dual-clutch gearbox. Background technique [0002] The hybrid vehicle takes the wheel end torque as the final torque control target. In the hybrid vehicle without gearbox, since the transmission ratio is fixed, the target torque of the power source engine or motor calculated by the wheel end demand torque has no sudden change and is continuous. change. However, a hybrid vehicle configured with a dual clutch transmission has multiple power sources, an engine and at least one electric motor. For a hybrid vehicle equipped with a dual-clutch gearbox, since the gears of the gearbox do not change continuously, there is a large step change before the speed ratio of each gear. At this time, if the target torque of the power source engine or motor is obtained by directly dividing the required torque...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/02F16H59/24F16H59/44F16H59/70
CPCF16H61/0213F16H59/70F16H59/44F16H59/24
Inventor 徐寅付晓丹王金航杨黎健陈立华何汉清
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD