Solenoid transmission hydraulic model method

Patent metadata

Field	Value
Publication number	US-9518679-B2
Application number	US-201414221996-A
Country	US
Kind code	B2
Filing date	Mar 21, 2014
Priority date	Mar 21, 2014
Publication date	Dec 13, 2016
Grant date	Dec 13, 2016

Abstract

A method is disclosed for determining off-temperature accuracy information of a solenoid fluid control valve. The method comprises performing a current sweep at a first temperature, and for at least one command pressure, determining an error in a control pressure based on the current sweep. The error may be determined at the first temperature. A metric may then calculated based on the current sweep, and a pressure error offset may be determined for a second temperature based on the metric. The pressure error offset may describe a difference between the error in control pressure at the first temperature and an expected error in control pressure at the second temperature.

First claim

What is claimed is:

1. A method for determining off-temperature accuracy information of a solenoid fluid control valve, the method comprising:
performing a current sweep at a first temperature, the current sweep comprising supplying, by a variable current source, a first current to a coil of the solenoid fluid control valve, changing the first current, and recording at least one resulting control pressure;
for at least one command pressure, determining an error in a control pres…

Assignees

• Flextronics Ap Llc

Inventors

• Seid David
• Baje Ritchie Wycoco
• Najmolhoda Hamid

Classifications

• F16K37/0091 Primary

  Mechanical Engineering · mapped topic

• G05D16/2022

  Physics · mapped topic

• F16K37/005

  Mechanical Engineering · mapped topic

• G05D16/2013

  Physics · mapped topic

• H01F7/08

  Electricity · mapped topic