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Hydraulic control device for continuously variable transmission

一种无级变速器、油压控制的技术，应用在传动装置控制、带有齿的元件、皮带/链条/齿轮等方向，能够解决油泵驱动负载变高等问题，达到抑制耐久性的降低、抑制位移的效果

Inactive Publication Date: 2013-01-02
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the above-mentioned oil pressure control device, when the line pressure becomes high, the driving load of the oil pump becomes high

Method used

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  • Hydraulic control device for continuously variable transmission
  • Hydraulic control device for continuously variable transmission
  • Hydraulic control device for continuously variable transmission

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Experimental program
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Effect test

no. 1 approach ）

[0039] Below, refer to Figure 1-6 , an embodiment in which the hydraulic control device for a continuously variable transmission of the present invention is embodied as an electronic control device 300 and a hydraulic control unit 200 for controlling a continuously variable transmission 100 mounted on a vehicle will be described. figure 1 It is a schematic diagram showing a schematic configuration of a continuously variable transmission 100 to be controlled by the hydraulic control device of the present invention.

[0040] Such as figure 1 As shown, the input shaft of the torque converter 110 in the continuously variable transmission 100 is connected to the output shaft of the internal combustion engine 400 . On the other hand, the output shaft of the torque converter 110 is connected to the input shaft of the switching mechanism 120 .

[0041] The switching mechanism 120 is a double pinion type planetary gear mechanism, and has a forward clutch 121 and a check brake 122 . ...

no. 1 approach

[0139] According to the first embodiment described above, the following effects can be obtained.

[0140] (1) In the hydraulic control device of the present embodiment, after the spool 217a of the first control valve 217 that controls the hydraulic pressure Pin is driven in the valve opening direction, the vibration suppression control that temporarily suppresses the displacement of the spool 217a is executed. .

[0141] Therefore, it is possible to suppress vibration of the valve body 217a when the valve body 217a is driven in the valve opening direction, and it is possible to suppress repeated increase and decrease of the oil pressure Pin supplied to the first pulley 130 across the target oil pressure Ptrg. In addition, by suppressing the vibration of the spool 217a in this manner, the vibration of the hydraulic pressure Pin supplied to the first pulley 130 is suppressed, and the vibration of the line pressure P1 feedback-adjusted based on the hydraulic pressure Pin can also...

no. 2 approach ）

[0159] Below, refer to Figure 7 with Figure 8 A second embodiment in which the hydraulic control device for a continuously variable transmission of the present invention is embodied as an electronic control device 300 and a hydraulic control unit 200 for controlling a continuously variable transmission 100 mounted on a vehicle will be described. In addition, compared with the first embodiment, this embodiment differs in the content of vibration suppression control, such as Figure 7 As shown, a closing valve 240 and a switching solenoid valve 241 for driving the closing valve 240 are added to the hydraulic control unit 200 . Other configurations of this embodiment are the same as those of the first embodiment. Therefore, descriptions of the same parts as those of the first embodiment will be omitted below, and parts different from those of the first embodiment will be described in detail.

[0160] The oil pressure control unit 200 of this embodiment, such as Figure 7 As ...

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Abstract

Disclosed is a hydraulic control device for a continuously variable transmission which changes the transmission gear ratio by changing the hydraulic pressure (Pin, Pout) supplied to hydraulic pressure chambers (134, 154) for pulleys in the continuously variable transmission via control valves (217, 218) is changed. In this hydraulic control device, line pressure regulation hydraulic pressure (Psrv) which corresponds to the magnitudes of the oil pressure (Pin, Pout) supplied to the hydraulic pressure chambers (134, 154) is introduced into a regulator valve (212), and line pressure (P1) which is input into the control valves (217, 218) according to the magnitudes of the oil pressure (Pin, Pout) is subjected to feedback regulation. In the hydraulic control device for the continuously variable transmission, after the valve element (217a) of the control valve (217) is driven in the valve opening direction, a vibration restriction control operation which temporarily restricts the displacement of the valve element (217a) is executed.

Description

technical field [0001] The present invention relates to an oil pressure (hydraulic) control device for a continuously variable transmission that controls the oil pressure supplied to each pulley of a belt type continuously variable transmission, and in particular to The oil pressure control device of the continuously variable transmission that performs feedback adjustment of the line pressure of the original pressure (primary pressure) of the supplied oil pressure. Background technique [0002] As a transmission mounted on a vehicle or the like, there is known a belt-type continuously variable transmission having a first pulley to which the driving force of an internal combustion engine is transmitted, a second pulley connected to the wheel, and a belt wound around the pair of pulleys. , the transmission ratio is continuously and steplessly changed by changing the winding radius of the belt in each pulley. [0003] In such a belt-type continuously variable transmission, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/00
CPCF16H61/66259F16H61/66272F16H61/6625F16H2061/66286
Inventor 西田直史
Owner TOYOTA JIDOSHA KK