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Variabler-hub-getriebepumpe-steuerung

一种变速器、可变的技术，应用在泵控制、传动装置控制、带有齿的元件等方向，能够解决变速器内部阻力、单向离合器昂贵等问题，达到减少损失的效果

Active Publication Date: 2010-10-13
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional one-way clutches are expensive and create internal drag in the transmission

Method used

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  • Variabler-hub-getriebepumpe-steuerung

Examples

Experimental program
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Embodiment Construction

[0017] Referring now to the accompanying drawings, figure 1 A hydraulic circuit 10 of an automatic transmission is illustrated including a variable displacement hydraulic vane pump 12 , a primary regulator valve 14 and a pump displacement control valve 16 controlled by a variable force solenoid 18 .

[0018] A hydraulic fluid discharge pump 12 is installed in line 20 to supply hydraulic fluid to the transmission. Line 24 carries pump displacement control pressure from valve 16 to pump 12 . Solenoid feedback pressure is sent in line 26 to valve 16 and valve 86 . When the pressure in line 24 is high, pump control ring 28 rotates counterclockwise about point 30 against the force of compression spring 32 . This rotation reduces the volume 34 through which the vanes 36 on the pump rotor 38 rotate, ie, the pump displacement, and reduces the flow rate of liquid exiting the pump 12 . When the pressure in line 24 is low, pump control ring 28 is turned clockwise, thereby increasing t...

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PUM

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Abstract

A system for controlling fluid flow rates in a transmission includes a pump having variable displacement and providing a pressurized fluid source, a regulating valve communicating with the fluid source and a pressure sensor, the pressure sensor producing a variable control signal whose magnitude represents a degree to which fluid flow requirements of the transmission are being provided by the fluid source, and an actuating valve producing a pressure that changes the pump displacement in response to the magnitude of the control pressure.

Description

technical field [0001] This invention relates generally to electrohydraulic control of automatic transmissions, and more particularly to control systems with active control of pump displacement. Background technique [0002] Most existing automatic transmissions use solenoids in conjunction with trim and latch values ​​to individually control the clutches and brakes that are applied or released to create the gear ratios of the transmission gears. The valve body assembly needs to include the solenoids with the trim and detent valves and therefore includes multiple layers to house all the solenoids and valves. Such valve bodies add cost and size due to multiple valve body layers, and delays in hydraulic response time due to multiple stages from solenoid output to regulator valve input to regulator output, These must be controlled. Additionally, these delays are temperature sensitive. [0003] Conventional automatic transmissions use exhaust fluids to improve hydraulic contr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B49/22F04B49/06
CPCF16H61/0021F16H57/0435
Inventor S·A·弗赖特
Owner FORD GLOBAL TECH LLC
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