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Hydraulic control system for automatic speed variator of vehicle

A technology of hydraulic control system and automatic transmission, applied in the direction of transmission control, control device, joint control, etc., can solve the problems of friction elements that cannot be controlled independently, increase manufacturing cost and operating noise, etc.

Inactive Publication Date: 2004-01-14
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in a conventional automatic transmission, a control mechanism controls at least two friction elements, so the friction elements cannot be independently controlled
In addition, since the friction element is directly controlled by the primary control pressure of the solenoid valve, a solenoid valve with high capacity and high accuracy is required, which increases manufacturing cost and operation noise

Method used

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  • Hydraulic control system for automatic speed variator of vehicle
  • Hydraulic control system for automatic speed variator of vehicle
  • Hydraulic control system for automatic speed variator of vehicle

Examples

Experimental program
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Embodiment Construction

[0058] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0059] Figure 1 shows a power train connectable to a hydraulic control system according to a preferred embodiment of the present invention.

[0060] When rotational power is transmitted from an engine 2 to an input shaft 6 through a torque converter 4, the input shaft 6 transmits torque to the first and second single-gear planetary gear sets 8 and 10, and shifting is effected while the torque is transmitted through the first One and the second single-gear planetary gear set 8 and 10 output to the transmission drive gear 14 . The transmission drive gear 14 is connected to a first planet carrier 12 of the first single-pinion planetary gear set 8 .

[0061] The first single-gear planetary gear set 8 includes a first sun gear 16, a first planet carrier 12 and a first ring gear 18, and the second single-gear planetary gear set 10 includes a second s...

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PUM

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Abstract

A hydraulic control system for an automotive automatic transmissions includes a pressure regulator, a pressure reducer, a shift controller having a manual valve cooperating with a shift selector lever and connected to a plurality of range pressure lines, a pressure controller comprising first, second and third solenoid valves, and first, second and third pressure control valves, the first, second and third pressure control valves being independently controlled by control pressure supplied from the first, second and third solenoid valves, respectively, a switching controller comprising a first switch valve and a second switch valve, a fail-safer comprising a first fail-safe valve, a second fail-safe valve and an N-R controller comprising an N-R control valve.

Description

technical field [0001] The invention relates to a hydraulic control system of an automatic transmission of an automobile. Background technique [0002] A conventional automatic transmission used in a vehicle includes a torque converter; a multi-stage gear shift mechanism connected to the torque converter; and a plurality of friction elements actuated by hydraulic pressure to select a transmission of the gear shift mechanism Ratio stage, the gear shifting mechanism is realized by a planetary gear set. The engagement and disengagement of the friction elements is controlled by a hydraulic control system which controls the pressure generated in an oil pump to vary the shift ratio of the planetary gear set. [0003] In designing such an automatic transmission, firstly, a design object is selected, and then, a good design solution in terms of performance, life, reliability, and productivity is selected. [0004] After selecting the design scheme, a three-stage automatic transmis...

Claims

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Application Information

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IPC IPC(8): F16H61/00F16H61/02
CPCF16H61/0206F16H2306/00F16H61/686F16H61/12F16H2061/1204F16H61/4192
Inventor 金泰均张在德朴钟述沈炫秀李瑨熙李昌郁
Owner HYUNDAI MOTOR CO LTD