公开(公告)号：US10443712B2

公开(公告)日：2019-10-15

申请号：US15797847

申请日：2017-10-30

Applicant: DunAn Microstaq, Inc.

Inventor： E. Nelson Fuller ,  Parthiban Arunasalam ,  Wayne C. Long ,  Arvind P. Rao ,  Kevin Sinkar ,  Gengxun K. Gurley

IPC: F16H61/00 ,  G05D7/06 ,  G05B15/02 ,  G05D16/20 ,  F16H61/10 ,  F16H59/68 ,  F16K99/00 ,  F16H59/72

Abstract: A system for controlling fluid pressure to a transmission system through a MEMS microvalve includes a transmission controller configured to receive a target command pressure, a current system command pressure input signal, and a transmission system operating temperature. A power determination module determines a temperature-related power factor from the target command pressure, the current system command pressure input signal, the transmission system operating temperature received in the controller, and a look-up table within the controller. A power signal module adjusts the current system command pressure input signal by the temperature-related power factor and applies the adjusted current system command pressure input signal to the MEMS microvalve via the controller.

公开(公告)号：US10429108B2

公开(公告)日：2019-10-01

申请号：US15792809

申请日：2017-10-25

Applicant: DunAn Microstaq, Inc.

Inventor： Arvind P. Rao ,  Dhaman Kumar Besarla

IPC: F25B41/06 ,  F25B39/02 ,  G01K15/00 ,  G01K13/02 ,  F25B49/02 ,  G05D23/19 ,  G05D23/20 ,  F25B39/04

Abstract: A method of maintaining a fluid flow rate in a heating, ventilating, air conditioning, and refrigeration (HVAC-R) system while maintaining superheat in the HVAC-R system at a desired level includes: continuously measuring an operating fluid temperature of the HVAC-R system and calculating superheat at a pre-determined rate, determining if the calculated superheat is stable, measuring and recording an operating fluid pressure of the system each time the calculated superheat is stable, recording an average operating fluid pressure each subsequent time the superheat is stable, calculating an output PWM and reducing fluid flow through a metering valve when an actual PWM is greater than the calculated output PWM by adjusting a PWM signal to a microvalve in the metering valve, and increasing fluid flow through the metering valve when the actual PWM is less than the calculated output PWM by adjusting the PWM signal to the microvalve.

公开(公告)号：US20180120006A1

公开(公告)日：2018-05-03

申请号：US15792809

申请日：2017-10-25

Applicant: DunAn Microstaq, Inc.

Inventor： Arvind P. Rao ,  Dhaman Kumar Besarla

IPC: F25B41/06 ,  G01K15/00 ,  G01K13/02 ,  F25B49/02 ,  G05D23/19 ,  G05D23/20 ,  F25B39/04 ,  F25B39/02

CPC classification number: F25B41/065 ,  F25B39/028 ,  F25B39/04 ,  F25B41/062 ,  F25B49/02 ,  F25B49/022 ,  F25B2500/19 ,  F25B2600/21 ,  F25B2600/2513 ,  F25B2600/2515 ,  F25B2700/04 ,  F25B2700/135 ,  F25B2700/1933 ,  F25B2700/21151 ,  F25B2700/21175 ,  G01K13/02 ,  G01K15/005 ,  G05D23/1931 ,  G05D23/20

Abstract: A method of maintaining a fluid flow rate in a heating, ventilating, air conditioning, and refrigeration (HVAC-R) system while maintaining superheat in the HVAC-R system at a desired level includes: continuously measuring an operating fluid temperature of the HVAC-R system, continuously calculating HVAC-R system superheat at a pre-determined rate, determining if the calculated HVAC-R system superheat is stable, measuring and recording the operating fluid pressure of the HVAC-R system each time the calculated HVAC-R system superheat is stable, recording an average operating fluid pressure each subsequent time the superheat is stable, calculating an output PWM according to the equation: Output PWM=(Flow Rate Component)+(Superheat Component), and reducing fluid flow through a metering valve in the HVAC-R system when an actual HVAC-R system PWM is greater than the calculated output HVAC-R system PWM by adjusting a PWM signal to a microvalve in the metering valve, and increasing fluid flow through the metering valve in the HVAC-R system when the actual HVAC-R system PWM is less than the calculated output HVAC-R system PWM by adjusting the PWM signal to the microvalve in the metering valve.

公开(公告)号：US20180119799A1

公开(公告)日：2018-05-03

申请号：US15797847

申请日：2017-10-30

Applicant: DunAn Microstaq, Inc.

Inventor： E. Nelson Fuller ,  Parthiban Arunasalam ,  Wayne C. Long ,  Arvind P. Rao ,  Kevin Sinkar ,  Gengxun K. Gurley

IPC: F16H61/00 ,  G05D7/06 ,  G05B15/02 ,  F16H61/10

CPC classification number: F16H61/0021 ,  F16H59/72 ,  F16H61/0009 ,  F16H61/10 ,  F16H2059/683 ,  F16K99/0011 ,  F16K99/0028 ,  F16K99/0044 ,  G05B15/02 ,  G05D7/0635 ,  G05D16/2013

Abstract: A system for controlling fluid pressure to a transmission system through a MEMS microvalve includes a transmission controller configured to receive a target command pressure, a current system command pressure input signal, and a transmission system operating temperature. A power determination module determines a temperature-related power factor from the target command pressure, the current system command pressure input signal, the transmission system operating temperature received in the controller, and a look-up table within the controller. A power signal module adjusts the current system command pressure input signal by the temperature-related power factor and applies the adjusted current system command pressure input signal to the MEMS microvalve via the controller.