Shift control device for automatic transmission

一种自动变速器、控制装置的技术，应用在发动机控制、传动装置控制、带有齿的元件等方向，能够解决燃料消耗率恶化、行驶性恶化、驱动力不足等问题，达到抑制行驶性的恶化的效果

Active Publication Date: 2009-09-30
JATCO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the prescribed value for judging the prohibition of shifting is set to be the same regardless of the type of shifting, excessively restricting the shifting on the upshift side leads to deterioration of fuel consumption
[0011] In addition, there is also a problem that the predetermined value for determining the prohibition of shifting is set to the same value regardless of the driving state, and even when traveling on an uphill road where the driving force is insufficient, downshifting is prohibited in the same way as traveling on a flat road. gear, the driving force is insufficient and the driving performance is deteriorated

Method used

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  • Shift control device for automatic transmission
  • Shift control device for automatic transmission
  • Shift control device for automatic transmission

Examples

Experimental program
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no. 1 approach

[0055] figure 1 It is a functional block diagram showing the configuration of the shift control device of the automatic transmission of the first embodiment. figure 2 It is a schematic diagram showing the structure of an automatic transmission.

[0056]The speed change control device includes: a controller 1; an input shaft speed sensor (turbine shaft speed sensor) 12 that detects the speed NT of the turbine 25 and the turbine shaft 10; and an output shaft speed sensor (vehicle speed sensor) 13 that detects the speed No of the output shaft 28 , The oil temperature sensor 14 that detects the temperature of the ATF (automatic transmission oil), the throttle sensor 30 that detects the throttle opening of the engine not shown, the airflow sensor 31 that detects the amount of intake air of the engine, and the engine speed NE that detects Various sensors such as an engine speed sensor 32, an inclination sensor 33 that detects the inclination α of the road surface the vehicle is curre...

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PUM

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Abstract

This invention relates to a shift control device for an automatic transmission, which prevents deterioration of drivability by improving shift allowance. The shift control device comprises: a thermal load prediction unit which predicts a thermal load state of a friction element upon completion of a shift from a current thermal load state of the friction element; and a shift control unit which, when the thermal load state upon shift completion predicted by the thermal load prediction unit corresponds to a predetermined state, either performs the shift in a modified shift mode in which a heat generation amount of the friction element is smaller than the heat generation amount of the friction element when the predetermined state is not established, or prohibits the shift. The predetermined state is set at a different state in a case where the shift is an upshift and in a case where the shift is a downshift, and is set on the basis of a gradient of a traveling road.

Description

Technical field [0001] The invention relates to a gear shift control device of an automatic transmission. Background technique [0002] Generally, as an automatic transmission for automobiles, it is known that the rotation of the engine is input via a torque converter, and the speed is changed by a transmission mechanism having multiple sets of planetary gears, and the transmission is output to a drive shaft or a transmission shaft (axle side). [0003] The speed change mechanism of this automatic transmission transmits the rotation of the input shaft (drive shaft) to the specific gear or carrier constituting the planetary gear, or transmits the rotation of the specific gear or carrier to the output shaft as appropriate. Variable speed. In addition, a plurality of friction members such as clutches or brakes are provided in order to appropriately restrict the rotation of a specific gear or planet carrier during shifting, and the transmission path is switched by a combination of co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/00
CPCF16H61/16F16H59/72F16H2059/725Y10S477/901F16H59/24F16H59/68F16H63/12
Inventor 松尾克宏泷泽哲
Owner JATCO LTD
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