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METHOD FOR determining characteristics of solenoid fluid control valve

The temperature code of the solenoid fluid control valve is determined through current scanning and characteristic pressure, which solves the problem in the existing technology that the response characteristics of the solenoid under extreme temperatures is difficult to determine, and achieves higher calibration accuracy and higher gear shifting. quality.

Inactive Publication Date: 2020-04-10
FLEXTRONICS AP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But such knowledge is not easily obtained and communicated for each individual solenoid manufactured by the manufacturer and supplied to the customer

Method used

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Examples

Experimental program
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Embodiment Construction

[0018] The solenoid fluid control valve manufacturing process introduces variations in valve performance and response. These changes can be especially pronounced at extreme temperatures. Wrong output pressure for a given commanded current can lead to poor shift quality when solenoid fluid control valves are used in transmissions. Thus, knowledge of the response of a given solenoid fluid control valve to a particular commanded current allows the user to select the appropriate commanded current for a given temperature. In the prior art, this knowledge can be based on a single transfer function and can provide information that has been averaged for a large number of solenoids. figure 1 This process is shown in .

[0019] refer to figure 1 , a sweep of the commanded current for a particular solenoid can be performed, and the corresponding pressures at multiple input points can be recorded (step 100). The control pressure (kPa) data example relative to the command current (Ampe...

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PUM

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Abstract

A method is disclosed for determining characteristics of a solenoid fluid control valve. The method comprises performing a current sweep at a first temperature. The current sweep includes running a current through a coil of the solenoid fluid control valve and measuring a control pressure based on the current. The method further comprises choosing a first characterization control pressure for characterizing the solenoid fluid control valve. A first current may be determined that corresponds to the first characterization control pressure based on the current sweep, and a first metric may be assigned to the solenoid fluid control valve based on the first current. Information regarding the behavior of the solenoid fluid control valve at a second temperature may be determined based on the first and second metrics.

Description

[0001] This application is a divisional application of a Chinese patent application with an application date of April 8, 2014, an application number of 201480077383.0, and an invention title of "Method for Temperature Transmission Compensation". [0002] Cross References to Related Applications [0003] This application claims the benefit of US Nonprovisional Application Serial No. 14 / 221,861, filed March 21, 2014, the contents of which are hereby incorporated by reference. technical field [0004] The present invention relates to determining the trip temperature behavior of an electromagnetic solenoid actuator having an armature mechanism driving a fluid control element. Background technique [0005] Solenoid fluid control valves are commonly used to control fluid pressure in various systems including clutch mechanisms and other devices in automobiles. The environment in which these actuators must function can have a wide range of temperatures, resulting in variations in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B19/00F15B21/045F16D48/06F16K31/06F16K37/00
CPCF16D48/06F15B21/045F16D48/066F16D2500/3024F16D2500/3168F16D2500/70294F16D2500/70406F16D2500/70418F16K31/0675F16K37/0083F15B19/002G05D16/2013G01L19/04
Owner FLEXTRONICS AP LLC