Shanghai MAC Conference Nov. 24. – 25, 2008• FXV-BY: Fixed Orifice Valve with Bypass •...

Copyright 2004 OTTO EGELHOF GmbH & Co. KGM. Wollfarth, 24.10.2008

Shanghai MAC Conference Nov. 24. – 25, 2008

Expansion Valves in MACs for

Today‘s and Future Refrigerants

All data given in this presentation are strictly confidential. Copies and transfer of these data to thirdpersons and companies only following prior consent of the author.



Agenda:

1. Egelhof Company Group

• History and Locations

• Customer Survey AC Division

2. Expansion Valve Technology in R134a MACs

• Current Product Portfolio

• Current Product Portfolio in Hybrid Vehicles

3. Expansion Valve Technology in R744 MACs

• Fixed Orifice Valve with Bypass FXV-BY

• Pressure Difference Control Valve PXV

• High Pressure Control Valve HPCV

• Electronic Valve EPCV

4. Further R&D Activities in MACs

5. Contacts




History1980

Foundation of Egelhof SA Breitenbach

1992 Foundation of

Egelhof Holding SA Breitenbach

1993 ISO 9002

certification

1997 ISO 9001

certification

20102000

2000 QA 9000 certification

DIN ISO 14001 certification

1980 1990

1938 Company foundation

1940 1950 1960 1970

1961 Foundation of

Egelhof SA Seltz

2004 ISO TS 16949

certification

1998 Foundation of Egelhof China

Shanghai

2006 EM ISO 14001

certification

2005 Foundation of

Egelhof Regelungstechnik Suzhou China

2001 Foundation of

Egelhof Controls (Toledo USA)Suzhou Egelhof controls (China)




Locations

BREITENBACH (F) SELTZ (F)

SUZHOU (CHINA)

FELLBACH (D)

TOLEDO (USA) NEUVE-ÉGLISE (F)




Customer Survey A/C Division




Product Overview of our A/C Division



TBFSO

TBF Standard Flange

TBF Standard Flange

TBF SLSW

TBF Euroclim


Current product portfolio



2 - Port Version 3 - Port Version

5 - Port Versions


Current product portfolio in hybrid vehicles



FXV w/ Bypass PXV RTC-C FXO-SO


Overview: Valve technology available for R744 / CO2 systems



• FXV-BY: Fixed Orifice Valve with Bypass

• Internally controlled two-stage expansion device

• Two ports, assembly between IHX outlet and evaporator inlet

• Low pressure burst device can be integrated

• Valve available in different connection technologies

• Very robust design, three different valve generations were developed and tested since 2004

- App. 500 samples delivered to OEMs and Tier1s

- App. 30 vehicles were equipped with this valve technology, partly used in lifetime test runs

- So far here were no complaints with generation 2 and 3, in summary we had 3 complaints with the first generation


R744 FXV-BY



VentingMembrane

Metal Sealing againstAtmosphereBypass Spring

Filter with 160µm

Metal Bellow

Adjusting Screw for the Bypass Spring

AluminumBody

ClosedBypass

OpenBypass

Orifice

Orifice and Bypass


R744 FXV-BY



• pHP < p1:

Partial-load operation:

Bypass is closed. The maximum mass flow is defined and fixed by the orifice.

• p1 < pHP < p2:

Full-load operation:

Depending on pHP Bypass is opening up until max stroke.Mass flow can be increased significantly up to m2.

• pHP > p2:

Bypass stroke limitation and therefore maximum flow section is achieved and can not be increased further more.


R744 FXV-BY

PHDp1 p2

m1•

m2•

m•

BypassOrifice

Ventil

vollstä

geöffnet

PHDp1 p2

m1•

m2•

m•

PHDp1 p2

m1•

m2•

m•

PHDp1 p2

m1•

m2•

m•

Pp1 p2

m1•

m2•

m•

m1•

m1•

m2•m2•

m•m•

BypassOrifice

Valve Characteristic Valvecompletely

open



• PXV: Pressure Difference Control EXpansion Valve• Expansion valve controlled by pressure difference:

∆p = pValve, in – pValve, out

• Valve starts opening at ∆p = 0,5MPa (Pop-Up function)• Simple design• Very small space requirements, weight ~ 3,5g (incl. Filter)• Improved COP-performance• Optimized characteristic• 80µm Filter integrated• Different connection technologies realized

- Visteon / Obrist- ContiTech- SMA

• Start-up dynamics not sufficient • App. 150 samples were delivered to different customers so far,

app. 40 vehicles were equipped with PXVs


R744 PXV



Adjusting Screw

Spring

Nozzle

Nozzle Needlewith Bypass

Balance of forces:FHP = FLP + Fspring

Characteristic can be adjusted with different geometries for nozzle and needle:


R744 PXV

Differenzdruck ?p / bar

Dro

sse

lqu

ers

chn

itt

PXV Kennlinie mit 3 definierten Bereichen

Standard PXV Kennlinie ohne Anpassung

Orifice

Differenzdruck ?p / bar

Dro

sse

lqu

ers

chn

itt

Pressure Difference in bar

Flo

w S

ect

ion

PXV Characteristic with

3 defined operating ranges

Standard PXV Characteristic w/o modifications

Orifice



• HPCV: High Pressure Control Valve

• Compact design, weight app. 220 g

• No remote sensor and no signal transmission required

• The HPCV realizes three different operating ranges:

- Subcritical: pHP < pCr ≈ 7,5 MPaValve is working as a „fixed orifice“

- Supercritical: pHP > pCr ≈ 7,5 MPaCOP-optimized high pressure control

- High pressure limitationSafety function e.g. at a standstill pressure of 9,0 MPa(T ≈ 54°C at 260 g/l)

• Low pressure burst device can be integratedHPCV:

Thermostatic

Expansion Valve


R744 HPCV



0

50

100

150

200

250

300

350

5 6 7 8 9 10 11 12 13

Hochdruck p_H in MPa

Mas

sens

trom

in

kg/h

15 °C

35 °C

50 °C

0

50

100

150

200

250

300

350

5 6 7 8 9 10 11 12 13


Mas

sens

trom

in

kg/h

0

50

100

150

200

250

300

350

5 6 7 8 9 10 11 12 13


Mas

sens

trom

in

kg/h

15 °C

35 °C

50 °C

pHP in MPa

Simulated mass flow

in kg/h

Simulated Characteristic shows different operating ranges depending on high pressure value


R744 HPCV



• EPCV: Electronic Pressure Control Valve

• Prototype size 125 x 42 x 50mm,target 100 x 42 x 50mm

• Weight app. 220 g

• Additional pass to a second evaporatorat high pressure side

• Drive: Proportional solenoid, pushing:

- Voltage: 10.5V up to 16V PWM at 400Hz

- Power level: 10W (cold solenoid)

- Operating temperature range:-30°C up to +80°C

• Low pressure burst device can be integrated


R744 EPCV



Proportional Solenoid

Push Rod

Filter

Nozzle

Valve Outlet

Valve Inlet

Low Pressure Burst Device

Characteristics:

• Valve position is depending on pressure value

– flow section is adjusted in case of fast mass flow increase

– Only small flow section is provided in case of high pressure differences (>50 bar)

• High accuracy in particular at lower mass flow levels

• Mass flow exceeding 250kg/h can be realized

• Characteristic can be adjusted: Linear or progressive


R744 EPCV



• Member of the SAE program CRP 1234 – 2- Focus is investigation of material compatibility of different

plastic and rubber materials against HFO1234yf- Test results are completed, final discussion took place

on September 14 – 16, 2008

• System tests are planned on our AC System test benchin November 2008- NDA with Honeywell / DuPont is signed- All system components are available- Main target is the optimization of the expansion

valve in the HFO1234yf system- The required expansion valve design

will mainly be based on today’sR134a valve technology

4. Further R&D Activities in MACs

Investigation Alternative Refrigerant HFO 1234yf



5. Contacts

EGELHOF SAS / USINE 1 Appareils de régulationRue du MoulinF-67220 Breitenbach Tel.: +33-388 589270 Fax: +33-388 572722 e-mail: [email protected]: www.egelhof.com

EGELHOF SAS / USINE 3 Appareils de régulation72 a, Rue PrincipaleF-67470 Seltz Tel.: +33-388 055911 Fax: +33-388 868579e-mail: [email protected]: www.egelhof.com

EGELHOF CONTROLS CORP., USA6001 Brent Drive Toledo, OH 43611Tel.: +1-419 729 9702 Fax: +1-419 729 0263e-mail: [email protected]: www.egelhof.com

EGELHOF Regelungstechnik (Suzhou) Co., Ltd., China 369 Lushan Road, Nr. 27 Suzhou New District 215129 Tel.: +86 512 666 2999 0 Fax: +86 512 666 2999 1e-mail: [email protected]: www.egelhof.com

OTTO EGELHOF GmbH & Co. KG

Stuttgarter Str. 60 D-70736 Fellbach Tel.: +49-711-57547-0 Fax: +49-711-57547-241e-mail: [email protected]: www.egelhof.com

EGELHOF Sensoric SAS Appareils de regulationRue l‘AltenbergF-67220 NEUVE ÉGLISE (Villé)Tel.: +33-388 589270 Fax: +33-388 572722 e-mail: [email protected]: www.egelhof.com

Shanghai MAC Conference Nov. 24. – 25, 2008• FXV-BY: Fixed Orifice Valve with Bypass •...

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Transcript of Shanghai MAC Conference Nov. 24. – 25, 2008• FXV-BY: Fixed Orifice Valve with Bypass •...