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Lock-up clutch control method and system for automatic transmission provided with hydraulic torque converter

A lock-up clutch, automatic transmission technology, applied in the direction of transmission control, elements with teeth, transmission, etc., can solve problems such as worsening driving comfort, improve driving comfort, improve acceleration jerk, and ensure driving. dynamic effect

Active Publication Date: 2021-02-02
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The automatic transmission with a torque converter will use the lock-up clutch to maintain the locked state during acceleration for power; due to the rigidity, the vehicle may have the road surface to stimulate the vehicle to resonate (that is, cause acceleration shock) when accelerating. situation, thereby deteriorating driving comfort

Method used

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  • Lock-up clutch control method and system for automatic transmission provided with hydraulic torque converter
  • Lock-up clutch control method and system for automatic transmission provided with hydraulic torque converter
  • Lock-up clutch control method and system for automatic transmission provided with hydraulic torque converter

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Embodiment Construction

[0013] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0014] Such as figure 1 The lock-up clutch control method of the automatic transmission with a hydraulic torque converter shown is executed by the transmission controller (ie TCU), and the TCU can obtain the signal of the transmission fault light (if the transmission fault light is on, it means that the transmission is in fault mode, if the transmission fault light remains off, it means that the transmission is in normal working mode), transmission oil temperature signal, transmission gear position signal, accelerator pedal opening signal, vehicle speed signal, slope signal, transmission output shaft speed signal, and judge and process .

[0015] Such as figure 1 As shown, the lock-up clutch control method includes:

[0016] Step 1: The TCU judges whether the lock-up clutch is in the locked state, if so, executes the second step, otherwise executes the fifth step;...

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PUM

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Abstract

The invention discloses a lock-up clutch control method and system for an automatic transmission provided with a hydraulic torque converter. The control method includes the steps that a lock-up clutchis controlled to enter slip frequency control under the condition that the lock-up clutch is in a locked state and the accelerated rising condition occurs; and when the lock-up clutch is in the slipfrequency state, if the condition that the lock-up clutch quits slip frequency control is met, the lock-up clutch is controlled to quit slip frequency control. According to the method and the system,the accelerated rising condition can be improved, so that the dynamic property and comfort of the whole vehicle are balanced.

Description

technical field [0001] The invention belongs to the field of transmission control, and in particular relates to a lock-up clutch control method and system of an automatic transmission with a hydraulic torque converter. Background technique [0002] Vehicle acceleration is an indispensable and widely used working condition in the driving cycle. The automatic transmission with a torque converter will use the lock-up clutch to maintain the locked state during acceleration for power; due to the rigidity, the vehicle may have the road surface to stimulate the vehicle to resonate (that is, cause acceleration shock) when accelerating. situation, thereby deteriorating driving comfort. How to control the lock-up clutch so that the slip control of the torque converter takes into account the power transmission efficiency and shock absorption performance to achieve a balance (that is, to find the balance point of comprehensive performance) is an urgent problem to be solved. Contents ...

Claims

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Application Information

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IPC IPC(8): F16H61/04F16H61/14
CPCF16H61/143F16H61/0437F16H2061/145F16H2061/146F16H2061/0492Y02T10/60
Inventor 韩涌波向光军黄辉
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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