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Hydraulic controller for belt driving stepless speed variator and control method thereof

A technology of continuously variable transmission and control equipment, which is applied in the direction of transmission control, transmission, mechanical equipment, etc., can solve problems such as cost increase

Inactive Publication Date: 2009-04-08
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the learning and control of the pipeline pressure control system, a hydraulic sensor for detecting the pipeline pressure needs to be additionally provided, which leads to an undesired cost increase

Method used

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  • Hydraulic controller for belt driving stepless speed variator and control method thereof
  • Hydraulic controller for belt driving stepless speed variator and control method thereof
  • Hydraulic controller for belt driving stepless speed variator and control method thereof

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Embodiment Construction

[0033] Hereinafter, embodiments of the present invention will be explained with reference to the drawings.

[0034] will refer to figure 1 A powertrain of a vehicle including a hydraulic pressure control apparatus according to an embodiment of the present invention is explained. The hydraulic control device according to the embodiment of the present invention is applied to figure 1 powertrain, and is implemented by the hydraulic control part 1100. Before explaining the hydraulic circuit of this hydraulic control portion 1100, the powertrain will be described.

[0035] Such as figure 1 As shown, this powertrain includes an engine 100, a torque converter 200, a forward-reverse switching device 290, a belt drive continuously variable transmission (CVT) 300, a differential 800, an electronic control unit (ECU) 1000 and a hydraulic control part 1100 .

[0036] A rotational output shaft of engine 100 is connected to a rotational input shaft of torque converter 200 . Therefore,...

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PUM

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Abstract

The present invention discloses a hydraulic control equipment for belt transmission stepless speed-changer and its control method. When the oil pump output learning mark is set as ON, it can execute the following steps: outputting hydraulic command value higher than pipeline pressure P(L) to linear coil (SLS); adopting inversion mode to output control load of linear coil (SLT); using hydraulic sensor for detecting hydraulic pressure regulated by linear electromagnetic valve (SLS) to detect pipeline pressure P(L); and learning and correcting diagram of relationship between the inversion control load of linear coil (SLT) and detected pipeline pressure.

Description

technical field [0001] The present invention relates to a control device for a continuously variable transmission, and more particularly, to a hydraulic control device for a belt-driven continuously variable transmission and a control method thereof. Background technique [0002] As basic structural elements, a belt-driven continuously variable transmission includes a driving-side rotating member, a driven-side rotating member, and a transmission member (belt) wound around the driving-side rotating member and the driven-side rotating member. A continuously variable transmission controls the speed ratio of the transmission by hydraulically controlling the wrap radius of the transmission member relative to the drive side rotating member. [0003] The belt drive continuously variable transmission includes: an input shaft to which torque from an engine is input; an output shaft arranged in parallel with the input shaft; a primary pulley arranged on the input shaft side; and a se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H9/00F16H61/02F16H59/06F16H59/44F16H59/68
Inventor 曽我吉伸大形勇介羽渕良司
Owner TOYOTA JIDOSHA KK