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Control device for automatic transmission

A technology of automatic transmission and control device, applied in the direction of transmission device, fluid transmission device, transmission device control, etc., can solve the problems of violating the idling feeling, slow shifting, etc., and achieve the effect of suppressing the impact of shifting, avoiding sluggishness and idling feeling.

Active Publication Date: 2014-07-23
JATCO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, since the engine torque appears during the shift, there will be a problem of slow shifting, and especially in the case of shifting in the high-rotation range, it will take time to shift, so there will be a driver's disobedience. new problem

Method used

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  • Control device for automatic transmission
  • Control device for automatic transmission
  • Control device for automatic transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] figure 1 It is a schematic diagram showing the system configuration of the automatic transmission of the first embodiment. An engine 1 is connected to a transmission mechanism unit 3 of an automatic transmission via a torque converter 2 . The engine 1 increases or decreases the output through the throttle valve whose opening increases from fully closed to fully open in conjunction with the accelerator pedal operated by the driver. The output rotation of the engine 1 passes through the torque converter 2 and is input to the transmission mechanism 3 input shaft 4. The torque converter 2 employs a well-known configuration having a function of amplifying the output torque of the engine 1 by generating a difference between input and output rotational speeds. In addition, the torque converter 2 is provided with a lock-up clutch 2a that can suppress the difference in input and output rotational speeds, in other words, can suppress the torque amplification effect, and can dir...

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PUM

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Abstract

The purpose of the present invention is to provide a control device for an automatic transmission, wherein it is possible to reduce shift shocks regardless of how the driver is operating the acceleration pedal. A control device for an automatic transmission, the control device being provided with a lock-up clutch and a torque converter disposed between an engine and an automatic transmission, and an upshift control means for carrying out a power-on upshift for shifting gears by reducing the fastening capacity of a release-side fastening element fastened to a gear shift before shifting and by increasing the fastening capacity of a fastening-side fastening element fastened to a gear shift after shifting when upshifting while a driver presses on the acceleration pedal, wherein the upshift control means continues to carry out the power-on upshift by reducing the fastening capacity of the lock-up clutch when the acceleration pedal is released while the power-on upshift is being carried out.

Description

technical field [0001] The invention relates to a speed change control during upshifting of an automatic transmission. Background technique [0002] Conventionally, as described in Patent Document 1, when an upshift is performed with the driver depressing the accelerator pedal (hereinafter referred to as a power on up shift), an actual shift occurs in the gear ratio. In the changing inertia phase, the inertia phase occurs due to the clutch capacity on the engaging side, and the gear change is performed. On the other hand, when the driver lifts the accelerator pedal and performs an upshift (hereinafter referred to as a power off up shift), since the engine torque is low, the output after the upshift Since the torque becomes low, it is an object to suppress the torque step (shock) at the end of the inertia phase by controlling the output torque in the inertia phase to be as low as possible. Therefore, not only the torque capacity on the coupling side in the inertia phase is ...

Claims

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Application Information

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IPC IPC(8): F16H61/04F16H61/14
CPCF16H61/061F16H61/143F16H61/684F16H59/18F16H2061/146F16H2061/0492B60W10/02B60W10/023B60W10/11
Inventor 岩本育弘
Owner JATCO LTD
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