Gear shift controlling method and system for automatic changing speed device

A technology of automatic transmission and shift control, applied in the direction of engine control, transmission control, and components with teeth, etc., can solve the problems of manual movement, foot brake decay, difficult engine braking, etc.

Inactive Publication Date: 2003-03-19
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in speed gears below third speed, the driver must manually move the shift lever to downshift in order to apply engine braking
[0008] For the above reasons, when driving in forward gears, the driver usually uses the foot brake instead of the engine to brake, and frequent or continuous use of the foot brake causes fading phenomenon or air lock phenomenon, so the braking performance is reduced
[0009] Namely, in a conventional automatic transmission, it is relatively easy to use engine braking
However, in an automatic transmission with a manual shift mode, it is difficult to quickly use the engine to brake

Method used

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  • Gear shift controlling method and system for automatic changing speed device
  • Gear shift controlling method and system for automatic changing speed device
  • Gear shift controlling method and system for automatic changing speed device

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Embodiment Construction

[0033] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] Such as figure 2 with 3 As shown, the gear shift control system described in the preferred embodiment of the present invention includes a gear shift accessory 200, a shift lever position sensor 320, an accelerator pedal position sensor 330, a control mechanism (or speed change control unit) 340, a memory 350 and a brake 360 ​​.

[0035] The shift accessory 200 includes an automatic shift mode gear 210 and a manual shift mode gear 220 . The automatic shift mode gear 210 includes a park gear P, a reverse gear R, a neutral gear N, a forward gear D and an engine braking gear Ds, and the manual shift mode gear 220 includes a manual upshift (+) and a manual downshift (-). Preferably, the engine brake range Ds is below the drive range D, and if the shift lever 230 is in the engine brake range Ds, a downshift is performed to use the e...

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PUM

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Abstract

A shift control system and a method thereof for an automatic transmission of a vehicle are provided. A shift range assembly permits selection of a specific shift range of automatic shift mode ranges and manual shift mode ranges. The automatic shift mode ranges include a park range, a reverse range, a neutral range, a drive range, and an engine-brake range. A shift lever position sensor detects the specific shift range selected by the shift lever assembly and outputs a corresponding signal. A shift controller outputs a shift signal for down-shifting from a current shift speed to a shift speed lower by 1 shift speed, if the detected specific shift range is the engine-brake range.

Description

technical field [0001] The present invention relates to an automatic transmission, more specifically, to a shift control method and system for the automatic transmission. Background of the invention [0002] Usually, such as figure 1 As shown, in an automatic transmission with an automatic shift mode and a manual shift mode (sport mode), the automatic shift mode and a manual shift mode are respectively arranged on the left side of the fixed base of the gear lever fitting side and right side. The automatic shift mode includes a parking gear P, a reverse gear R, a neutral gear N, and a forward gear D, and the manual shift mode includes a manual upshift (+) and a manual downshift (-). [0003] In manual mode, a shift lever 110 is allowed to be moved to manually upshift and downshift the automatic transmission. [0004] In the transmission described above, the engine can be used for braking in all vehicle speed ranges. However, with this configuration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/02F16H59/02F16H61/04F16H61/21
CPCF16H61/21F16H59/0204Y10T477/692Y10T477/69F16H61/04
Inventor 李相信
Owner HYUNDAI MOTOR CO LTD
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