section 6 & 7 oil & heat management
TRANSCRIPT
![Page 1: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/1.jpg)
© International Aero Engines Inc 2000
Oil SystemOil System
Introduction. Self contained, recirculating design to
provide reliable lubrication and cooling, under all conditions.
Oil cooling is controlled by a dedicated ‘Heat Management System’ which maintains the engine oil, IDG oil and fuel temperatures at optimum levels.
![Page 2: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/2.jpg)
© International Aero Engines Inc 2000
Oil SystemOil System
System Monitoring. Engine oil system is monitored by the
following flight deck indications:
Engine Oil Pressure. Engine Oil Temperature. Oil Tank Contents. (Quantity Transmitter)
![Page 3: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/3.jpg)
© International Aero Engines Inc 2000
Oil SystemOil System
System Monitoring (Continued).
In addition the following warnings will be given for the ‘non-normal’ conditions:
Low Oil Pressure. Scavenge Filter Clogged or Partly Clogged. No. 4 Bearing Scavenge Valve Inoperative.
![Page 4: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/4.jpg)
© International Aero Engines Inc 2000
External
Gearbox
Angle gearbox TX
ACOC
FCOC
# 4 Bearing
# 1,2 & 3 Bearing
H.P Pump
# 5 Bearing
Scavenge Filter
Scavenge Oil Pump Pack
De-Oiler
![Page 5: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/5.jpg)
© International Aero Engines Inc 2000
Oil SystemOil System
Oil Tank. Purpose: To store the oil supply for the engine.
Location: Located to the top left hand side of the
external gearbox.
Type: Pressurised, ‘Hot Tank’.
![Page 6: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/6.jpg)
© International Aero Engines Inc 2000
Oil SystemOil System
Oil Tank (Continued).Features: Mounting boss for ‘Oil Quantity
Transmitter’.
Oil system servicing: Gravity Filler Port. ‘Sight glass’ oil level indicator Tank capacity = 29 U.S. quarts. (Usable oil) = 24 U.S. quarts.
![Page 7: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/7.jpg)
© International Aero Engines Inc 2000
![Page 8: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/8.jpg)
© International Aero Engines Inc 2000
Oil SystemOil System
Oil Tank (Continued). Internal ‘Cyclone’ type de-aerator. Tank pressurisation valve (6 p.s.i.) Maintains
pressure at inlet to oil pressure pump. Strainer in tank outlet to pressure pump. Mounting for scavenge filter and master
magnetic chip detector, on rear face.
![Page 9: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/9.jpg)
© International Aero Engines Inc 2000
Oil SystemOil System
Pressure Pump/Pressure Filter Assembly.
Purpose: Supply oil under pressure to the engine
bearings, gearbox drive and accessory drives.
Type: Standard ‘Gear Type’ (Speed = 21.4% N2)
![Page 10: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/10.jpg)
© International Aero Engines Inc 2000
Oil SystemOil System
Pressure Pump/Pressure Filter Assembly.
Location: Front face, left side of external gearbox
Features: Provides housing for the pressure filter. ‘Cold Start’ pressure limiting valve. Flow trimming valve.(Test cell adjustment)
![Page 11: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/11.jpg)
© International Aero Engines Inc 2000
Flow Trim Adjuster
H.P. Oil Filter
© International Aero Engines Inc 2000
![Page 12: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/12.jpg)
© International Aero Engines Inc 2000
Oil SystemOil System
Pressure Filter.
Purpose: To trap solid contaminants.
Type: Mesh type filter - cleanable - nominal 125
micron rating.
![Page 13: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/13.jpg)
© International Aero Engines Inc 2000
Oil SystemOil System
Pressure Filter. Location: On the pressure pump housing.
Features: Anti-drain valve. Pressure priming connection.
![Page 14: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/14.jpg)
© International Aero Engines Inc 2000
Pressure Priming Connections
© International Aero Engines Inc 2000
![Page 15: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/15.jpg)
© International Aero Engines Inc 2000
Oil SystemOil System
Air/Oil Heat Exchanger (Air Cooled Oil Cooler)
Purpose: Reject excess heat from the oil system to
the ‘fully modulated cooling (fan) air flow. Controlled by the EEC.
Type: Corrugated ‘fin and tube’ - ‘double pass’.
![Page 16: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/16.jpg)
© International Aero Engines Inc 2000
Oil SystemOil System
Air/Oil Heat Exchanger (Air Cooled Oil Cooler)
Location: Attached to the fan casing on the lower right
hand side.
Features: Oil by-pass valve. Modulated air flow as commanded by EEC
(Heat Management System). Air flow regulated by air control valve.
![Page 17: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/17.jpg)
© International Aero Engines Inc 2000
Air Cooled Oil Cooler
© International Aero Engines Inc 2000
![Page 18: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/18.jpg)
© International Aero Engines Inc 2000
![Page 19: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/19.jpg)
© International Aero Engines Inc 2000
External
Gearbox
Angle gearbox TX
ACOC
FCOC
# 4 Bearing
# 1,2 & 3 Bearing
H.P Pump
# 5 Bearing
Scavenge Filter
Scavenge Oil Pump Pack
De-Oiler
![Page 20: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/20.jpg)
© International Aero Engines Inc 2000
![Page 21: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/21.jpg)
© International Aero Engines Inc 2000
![Page 22: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/22.jpg)
© International Aero Engines Inc 2000
To Fuel Cooled Oil Cooler
Pump output
![Page 23: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/23.jpg)
© International Aero Engines Inc 2000
Oil SystemOil System
Fuel/Oil Heat Exchanger (Fuel Cooled Oil Cooler) Purpose:
Cool the engine oil
Heat the fuel. Type:
Single pass fuel flow - multi pass oil flow. Forms an integral unit with the LP Fuel Filter.
![Page 24: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/24.jpg)
© International Aero Engines Inc 2000
Fuel/Oil Heat Exchanger (Fuel Cooled Oil Cooler) Location:
Bolted to the Fan Casing left side, on the engine centre line.
Features:
Differential pressure relief valve.
Provides oil by-pass, when oil has high viscosity or if cooler is blocked.
Oil SystemOil System
![Page 25: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/25.jpg)
© International Aero Engines Inc 2000
Fuel/Oil Heat Exchanger (Fuel Cooled Oil Cooler)
Purpose: Cool the engine oil. Heat the fuel.
Type:
Single pass fuel flow - multi pass oil flow. Forms an integral unit with the LP Fuel Filter.
Oil SystemOil System
![Page 26: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/26.jpg)
© International Aero Engines Inc 2000
A1/A5 Location
![Page 27: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/27.jpg)
© International Aero Engines Inc 2000
Scavenge Pumps Unit.
Purpose:Returns (Scavenges) oil to the tank.
Type:Standard spur-gear type pump (x6).
All pumps rotate at the same speed (22%) of N2.
Pump capacity is determined by the width of the gears.
Oil SystemOil System
![Page 28: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/28.jpg)
© International Aero Engines Inc 2000
Scavenge Pumps Unit.
Location:Six scavenge pumps contained in a single unit. Rear face, left side of the gearbox.
Features:Combined oil flow, from all the scavenge returns, back to the tank.
Oil SystemOil System
![Page 29: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/29.jpg)
© International Aero Engines Inc 2000
Return to oil tank
![Page 30: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/30.jpg)
© International Aero Engines Inc 2000
De-Oiler.
Purpose:Separate the breather air/oil mixture.
Return the oil to the scavenge system, by its scavenge pump.
Vent the air overboard through the right hand fan cowl.
Type:Centrifugal separator.
Oil SystemOil System
![Page 31: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/31.jpg)
© International Aero Engines Inc 2000
No. 4 Scavenge Valve
![Page 32: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/32.jpg)
© International Aero Engines Inc 2000
![Page 33: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/33.jpg)
© International Aero Engines Inc 2000
Scavenge Filter.
Purpose:To trap solid contaminants
Type:Non-Cleanable.
Location:Bolted to the rear of the oil tank.
Oil SystemOil System
![Page 34: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/34.jpg)
© International Aero Engines Inc 2000
Scavenge Filter.
Features: By-pass valve. Differential Pressure switch. Provides housing for master magnetic chip
detector.
Oil SystemOil System
![Page 35: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/35.jpg)
© International Aero Engines Inc 2000
![Page 36: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/36.jpg)
© International Aero Engines Inc 2000
No 4 Bearing Scavenge Valve.
Purpose:Maintains No 4 bearing compartment carbon seal differential pressure.
Controls the venting of the compartment air/oil mixture to the de-oiler.
Type:Pneumatically operated two position valve:
Maximum flow at low engine speeds.
Closed to minimum area at high engine speeds.
Oil SystemOil System
![Page 37: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/37.jpg)
© International Aero Engines Inc 2000
![Page 38: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/38.jpg)
© International Aero Engines Inc 2000
# 4 Bearing Scavenge Valve
De-Oiler
![Page 39: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/39.jpg)
© International Aero Engines Inc 2000
# 4 Bearing Scavenge Oil Return
HP 10 Air
Valve Position Signal to EIU
![Page 40: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/40.jpg)
© International Aero Engines Inc 2000
No. 4 Bearing Scavenge Valve Operation
![Page 41: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/41.jpg)
© International Aero Engines Inc 2000
No. 4 Bearing Scavenge Valve Operation
![Page 42: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/42.jpg)
© International Aero Engines Inc 2000
No. 4 Bearing Scavenge Valve Operation
![Page 43: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/43.jpg)
© International Aero Engines Inc 2000
![Page 44: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/44.jpg)
© International Aero Engines Inc 2000
![Page 45: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/45.jpg)
© International Aero Engines Inc 2000
Valve Operation
![Page 46: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/46.jpg)
© International Aero Engines Inc 2000
Magnetic Chip Detectors (MCD).Location:
7 MCD’s are fitted in the oil scavenge system. External Gearbox - Left MCD. External Gearbox - Right MCD. Angle gearbox MCD. No. 1,2 & 3 Front bearing scavenge tube MCD. No 4 bearing MCD, located in the De-oiler scavenge outlet. No. 5 bearing scavenge tube MCD Master MCD in the combined scavenge return, on the
scavenge filter housing.
Oil SystemOil System
![Page 47: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/47.jpg)
© International Aero Engines Inc 2000
![Page 48: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/48.jpg)
© International Aero Engines Inc 2000
Magnetic Chip Detectors (MCD). The Master MCD has a dedicated access panel,
in the left hand fan cowl.
If the Master MCD indicates a problem, each of the remaining MCD’s are inspected, to discover the source of the problem.
Access to the individual MCD’s, is by opening of the left and right fan cowl doors.
Oil SystemOil System
![Page 49: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/49.jpg)
© International Aero Engines Inc 2000
Indications.The oil system parameters are displayed on the engine page on the Lower ‘Electronic Centralised Aircraft Monitoring’ (ECAM) screen.
Oil Temperature (Deg. Centigrade) ‘Normal’ - ‘green indication’.‘green indication’.
155 deg C or above - ‘flashing green’.‘flashing green’.
Oil SystemOil System
![Page 50: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/50.jpg)
© International Aero Engines Inc 2000
Indications. 155 deg C or above more than 15 minutes or
165 deg C with no delay.
Steady amber indication. Master caution light. Single chime. Message (Upper ECAM) ‘Eng 1 (2) “OIL HIGH
TEMP”
Oil SystemOil System
![Page 51: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/51.jpg)
© International Aero Engines Inc 2000© International Aero Engines Inc 2000
![Page 52: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/52.jpg)
© International Aero Engines Inc 2000
Oil Temperature
Oil Quantity
Scavenge Filter Clog
Oil Pressure
4
F.FILTERFUEL FILTERFUEL FILTER
![Page 53: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/53.jpg)
© International Aero Engines Inc 2000
Indications.Oil Low Temperature Warnings
(Throttle > idle and engines running)
Message ‘ENG 1(2) OIL LO TEMP’.‘ENG 1(2) OIL LO TEMP’. Single chime Master caution light
Oil SystemOil System
![Page 54: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/54.jpg)
© International Aero Engines Inc 2000
Indications.
Oil Quantity:
Normal - Green.- Green.
< 5 Quarts - Flashing green.- Flashing green.
Oil SystemOil System
![Page 55: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/55.jpg)
© International Aero Engines Inc 2000
Indications.Oil Pressure:
Normal - Green indication.Green indication.
390 psid or above - indication flashes.
60-80 psid - Amber indication- Amber indication
amber message
‘‘ENG OIL LO PR’ENG OIL LO PR’ on (Upper ECAM)
Oil SystemOil System
![Page 56: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/56.jpg)
© International Aero Engines Inc 2000
Indications.Oil Pressure:
60 psid or below - Red indication.Red indication.
Master warning light.
Continuous repetitive chime.
Red message (Upper ECAM).
‘‘ENG 1(2) OIL LO PR’ENG 1(2) OIL LO PR’
‘‘THROTTLE 1(2) IDLE’THROTTLE 1(2) IDLE’
Oil SystemOil System
![Page 57: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/57.jpg)
© International Aero Engines Inc 2000
Indications.Scavenge Filter:
If filter differential pressure > 12 psi, an oil filter message appears on Engine page on the (Lower ECAM).
‘OIL FILTER CLOG’
Oil SystemOil System
![Page 58: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/58.jpg)
© International Aero Engines Inc 2000
Oil Temperature
Oil Quantity
Scavenge Filter Clog
Oil Pressure
4
FUEL FILTERFUEL FILTER
![Page 59: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/59.jpg)
© International Aero Engines Inc 2000
Indications.Oil Consumption:
Acceptable oil use is not more than :
0.6 US pints per hour (0.5 Imperial pints/hour).
(0.28 Litres/hour).
If oil quantity increase of 200 cc’s or more is detected , then analyse oil sample for:
Fuel contamination.
Oil SystemOil System
![Page 60: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/60.jpg)
© International Aero Engines Inc 2000
Additional Oil System Components:
Differential Oil Pressure Transmitter Differential Low Oil Pressure Warning Switch
Location:
Upper Left side of the fancase
Oil SystemOil System
![Page 61: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/61.jpg)
© International Aero Engines Inc 2000© International Aero Engines Inc 2000
Oil Pressure Transmitter
Low Oil Pressure Warning Switch
![Page 62: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/62.jpg)
© International Aero Engines Inc 2000
Heat Management SystemHeat Management System
Purpose.
To provide adequate cooling and maintain the critical oil and fuel temperatures within specified limits, whilst minimising the requirement for fan air off-take.
![Page 63: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/63.jpg)
© International Aero Engines Inc 2000
Three sources of cooling are available:
LP fuel passing to the engine system. LP fuel which is being returned to the
aircraft tanks. Fan air.
Heat Management SystemHeat Management System
![Page 64: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/64.jpg)
© International Aero Engines Inc 2000
1
3
2
![Page 65: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/65.jpg)
© International Aero Engines Inc 2000
There are 4 basic configurations (Modes), in which the flow paths of fuel in the engine LP fuel system can be varied.
In each mode the cooling capacity is varied by control valves, which form:
The Fuel Diverter and Return to Tank Valve.
Heat Management SystemHeat Management System
![Page 66: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/66.jpg)
© International Aero Engines Inc 2000
The transfer between modes of operation is determined by software logic contained in the EEC.
The logic is generated around the limiting temperatures of the fuel and oil within the system.
This is combined with the signals from the aircraft which permits or inhibits fuel return to aircraft tanks.
Heat Management SystemHeat Management System
![Page 67: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/67.jpg)
© International Aero Engines Inc 2000
Mode 1: (Normal mode)
All the heat from the engine oil system and the IDG oil system is absorbed by the LP fuel flows.
Some of the fuel is returned to the aircraft tanks where the heat is absorbed or dissipated within the tank
Heat Management SystemHeat Management System
![Page 68: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/68.jpg)
© International Aero Engines Inc 2000
Diverter Valve
Return to Tank Valve
FMU
HP Pump
Filter
IDG Oil Cooling
LP Pump
LP SOV
Engine Oil Cooling
Fan Air
ACOC
Heat Management System - Return to Tank (Mode 1)
Normal Return to Tank mode
FCOC
FCOC
Fuel through the IDG FCOC combined with a quantity of fuel downstream of the Engine FCOC is modulated for return to tank. FMU by-pass flow is returned upstream of the fuel filter. This is the ‘Normal’ mode of operation.
![Page 69: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/69.jpg)
© International Aero Engines Inc 2000
Diverter Valve
Return to Tank Valve
FMU
HP Pump
Filter
IDG Oil Cooling
LP Pump
LP SOV
Engine Oil Cooling
Fan Air
ACOC
Heat Management System - Return to Tank (Mode 4)
FCOC
FCOC
Mode selected when, in normal mode the limit temperature (IDG, OIL, FUEL) cannot be maintained within limits.
Fuel through IDG FCOC modulated for return back to tank. FMU by-pass flow returned up stream of Engine FCOC. Supplemental cooling of fuel is provided in this mode.
![Page 70: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/70.jpg)
© International Aero Engines Inc 2000
Diverter Valve
Return to Tank Valve
FMU
HP Pump
Filter
IDG Oil Cooling
LP Pump
LP SOV
Engine Oil Cooling
Fan Air
ACOC
Heat Management System - No Return to Tank (Mode 3)
FCOC
FCOC
Mode selected when, return to tank is not allowed, in particular when the reuirements for fuel spill back to tank can no longer be satisfied ie.
•Engine at high power setting.
•Spill fuel temp > 100 deg C.
•Tank fuel temp > 54 deg C.
Fuel through the IDG FCOC returned downstream of the FCOC. FMU by-pass flow returned upstream of the fuel filter. Return to tank inhibited. This is the preferred mode when return to tank is not allowed.
![Page 71: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/71.jpg)
© International Aero Engines Inc 2000
Diverter Valve
Return to Tank Valve
FMU
HP Pump
Filter
IDG Oil Cooling
LP Pump
LP SOV
Engine Oil Cooling
Fan Air
ACOC
Heat Management System - No Return to Tank (Mode 5)
FCOC
FCOC
Low Engine Speed and High Oil TempFail-Safe Mode
This mode is used when conditions demand operations as in mode 3, but is not permitted because: IDG oil temp is high, or fuel spill to aircraft tank is not permissible because of high spill fuel temp.
![Page 72: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/72.jpg)
© International Aero Engines Inc 2000
![Page 73: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/73.jpg)
© International Aero Engines Inc 2000
Mode 1 Conditions:
Engine not at high power setting i.e. (Take-off and early part of climb).
Cooling fuel spill temperature less than 100 deg C.
Fuel temperature at pump inlet less than 54 deg C.
Heat Management SystemHeat Management System
![Page 74: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/74.jpg)
© International Aero Engines Inc 2000
Air/Oil Heat Exchanger
Air Modulating Valve
Purpose :
To govern the cooling flow of ‘Fan Air’ through the air/oil heat exchanger. As commanded by the Heat Management Control System. (EEC).
Heat Management SystemHeat Management System
![Page 75: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/75.jpg)
© International Aero Engines Inc 2000
Air Cooled Oil Cooler
![Page 76: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/76.jpg)
© International Aero Engines Inc 2000
Air/Oil Heat Exchanger
Air ModulatingValve Type:
Plate type, supported at either end by stub shafts.
Operated by ‘Electro-Hydraulic Servo Valve Mechanism (EHSV).
Location:Bolted to the outlet face of the air/oil heat exchanger.
Heat Management SystemHeat Management System
![Page 77: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/77.jpg)
© International Aero Engines Inc 2000
Air/Oil Heat Exchanger Air Modulating Valve Features: Fails ‘safe’. Valve fully open. Maximum cooling position. Fire seal forms an air tight seal between the
outlet from the unit and the fan cowl exit. Controlled by channel ‘A’ or ‘B’ of the EEC.
Heat Management SystemHeat Management System
![Page 78: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/78.jpg)
© International Aero Engines Inc 2000
Air/Oil Heat Exchanger
Air Modulating Valve Features (Continued):
Valve position feedback signal from a Linear Variable Differential Transducer (LVDT) to each channel of the EEC.
Valve positioned by fuel servo pressure acting on a control piston.
Fuel servo pressure directed by a torque motor in the EHSV Assembly.
Heat Management SystemHeat Management System
![Page 79: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/79.jpg)
© International Aero Engines Inc 2000
Air Modulating Valve
![Page 80: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/80.jpg)
© International Aero Engines Inc 2000© International Aero Engines Inc 2000
Electro-Hydraulic Servo Valve Assembly
Air Cooled Oil Cooler
![Page 81: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/81.jpg)
© International Aero Engines Inc 2000© International Aero Engines Inc 2000
Linearly Variable Differential Transducer (LVDT)
![Page 82: Section 6 & 7 Oil & Heat Management](https://reader033.vdocuments.net/reader033/viewer/2022061109/544cbe6bb1af9f3a0b8b4781/html5/thumbnails/82.jpg)
© International Aero Engines Inc 2000© International Aero Engines Inc 2000
Fuel Cooled Oil Cooler
Fuel Diver Return To Tank Valve