Control apparatus and control method for vehicular automatic transmission

一种自动变速器、控制装置的技术，应用在车辆变速箱、传动装置控制、多传动比传动装置等方向，能够解决输出轴转矩减小、驾驶性能降低、输出轴转矩增加等问题，达到防止驱动力的降低、防止冲击、快速换档的效果

Active Publication Date: 2013-05-08
TOYOTA JIDOSHA KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the above-mentioned related art, for example, when performing a shift in which the shift speed is emphasized, there is a problem that the output shaft torque is reduced by quickly disengaging the engaging device on the disengagement side during the shift. will increase
In particular, when the vehicle is running with a relatively large driving force, there is a possibility that such a decrease in output shaft torque results in a decrease in drivability

Method used

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  • Control apparatus and control method for vehicular automatic transmission
  • Control apparatus and control method for vehicular automatic transmission
  • Control apparatus and control method for vehicular automatic transmission

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Embodiment Construction

[0028] The present invention is applied to, for example, shift control of an automatic transmission of a hybrid vehicle. The hybrid vehicle includes an electric differential having an electric motor as a driving force source and a transmission connected to the electric differential. The electric differential portion may include: a differential system having a first rotation member, a second rotation member as an input rotation member and connected to the engine, and a third rotation member as an output rotation member; A first electric motor connected to the first rotating member, and a second electric motor connected to a power transmission path from the third rotating member to the drive wheels so as to enable power transmission. The second electric motor may be connected to an output rotary member of the electric differential, and the output rotary member may be connected to an output shaft of the automatic transmission. In rotary synchronous shifting, this mode of shiftin...

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Abstract

In a downshift of an automatic transmission in a state where an accelerator pedal is depressed, one of a clutch-to-clutch shift in which the shift is carried out by gradually reducing an engagement pressure of a clutch or a brake to be disengaged in the shift and a rotation synchronization shift in which the shift is carried out by reducing the engagement pressure of the clutch or the brake more quickly than in the clutch-to-clutch shift is selected based on an output shaft torque of the automatic transmission, a region where the rotation synchronization shift is selected is lower in output shaft torque than a region where the clutch-to-clutch shift is selected, and hence it is possible to appropriately selectively execute a shift placing emphasis on a shock and a shift placing emphasis on a shift speed in accordance with the output shaft torque.

Description

technical field [0001] The present invention relates to a control device and a control method for a stepped vehicle automatic transmission, and in particular, relates to an improvement in preventing occurrence of shock while improving shift responsiveness. Background technique [0002] A stepped automatic transmission, in which a plurality of shift stages are selectively established from a predetermined shift map according to the driving state of the vehicle, is widely used in various vehicles. In the automatic transmission described above, there is proposed a technique in which various types of shifting are selectively performed according to the depression amount of the accelerator pedal. For example, a shift control device for an automatic transmission described in Japanese Patent Application Publication No. 2002-295663 (JP-2002-295663A) corresponds to this technique. According to this technique, when the accelerator pedal is depressed at a relatively high speed, the shif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H59/14F16H61/02
CPCY02T10/6239F16H2200/2043F16H61/686F16H2061/0492F16H59/18F16H2200/0043F16H2200/201F16H59/14F16H59/44F16H61/02F16H61/061F16H2061/0444
Inventor 松原亨田端淳贝吹雅一安藤良树
Owner TOYOTA JIDOSHA KK
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