Control device and control method of automatic transmission

A technology for automatic transmissions and control devices, which is applied to control devices, transmission devices, fluid transmission devices, etc., and can solve problems such as slippage of friction elements and driver discomfort

Active Publication Date: 2016-07-06
JATCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the friction elements in the engaged state slip due to the start timing of supplying oil pressure to the friction elements in the released state for preparing for engagement, so the torque generated by the slipping disappears or the slipping friction elements are reconnected. The generated coupling impact will become a factor in the change of the front and rear acceleration of the vehicle, which may cause discomfort to the driver
[0007] That is, when the oil pressure supply to the friction elements in the released state is started without driving the mechanical pump, the oil pressure supplied to the automatic transmission will drop, and the friction elements in the engaged state will slip. May cause discomfort to the driver

Method used

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  • Control device and control method of automatic transmission
  • Control device and control method of automatic transmission
  • Control device and control method of automatic transmission

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Embodiment Construction

[0018] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0019] figure 1 It is a schematic configuration diagram of a vehicle equipped with a continuously variable transmission according to an embodiment of the present invention. The vehicle includes an engine 1 as a power source. The output rotation of the engine 1 is transmitted to Drive wheel 7 transmits. A parking mechanism 8 is provided on the second gear set 5, and the parking mechanism 8 mechanically locks the output shaft of the transmission 4 so that it cannot rotate when the vehicle is parked.

[0020] The vehicle is provided with a mechanical oil pump 10 m driven by receiving the rotation of the engine 1 and driven by a part of the power of the engine 1 , and an electric oil pump 10 e driven by receiving power supply from a battery 13 . The transmission 4 is provided with an oil pressure control circuit 11 that adjusts the oil pressure supplied from at least on...

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Abstract

A control device and control method for an automatic transmission. The control device of the automatic transmission according to the present invention includes: a coast stop control unit for performing a coast stop to stop the driving force source when the vehicle is in the running state, the first friction element is in the engaged state, and the second friction element is in the released state; The control unit controls the first friction element to be in the engaged state and the second friction element to be in the engaged state, and the friction element control unit is between when the stop of the driving force source is commanded by the coast stop control unit and until the rotation of the oil pressure source is stopped, Start supplying oil pressure to the second friction element.

Description

technical field [0001] The present invention relates to a control device and control method for an automatic transmission of a vehicle that stops and restarts a driving force source. Background technique [0002] Idling stop technology is widely used to improve fuel efficiency by stopping the engine, which is the driving force source, when the vehicle is stopped. For the purpose of further improving fuel efficiency, so-called coast stop control that stops the engine before the vehicle stops is put into practical use not only when the vehicle is stopped but also when the vehicle is decelerating. [0003] An automatic transmission mounted on a vehicle controls engagement of friction elements such as clutches by hydraulic pressure. In the case of deceleration and parking of the vehicle, in preparation for re-acceleration and re-starting, sometimes the friction elements are switched. On the other hand, when the engine is stopped while running, the oil pump driven by the engine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/02F16H61/14B60W10/06
CPCB60W10/06F16H61/0025F16H61/0204B60W2030/1809B60Y2400/72B60Y2300/18083B60Y2300/192F16H2312/14B60W10/04B60W10/10F16H2059/186F16H61/702Y02T10/60F16D48/02F16H61/04F16H61/14
Inventor 若山英史和久公佑青山训卓井上真美子浅井诏生
Owner JATCO LTD
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