Cooling water system arrangement - Internal
Treated cooling water is used for cooling the cylinder liners, cylinder heads, exhaust valve seats, charge air and lubricating oil.
The cooling water system is also needed for controlling the temperature of charge air after the turbocharger.
System components
- 01 HT water pump
- 02 Charge air cooler (HT)
- 03 LT water pump
- 04 Charge air cooler (LT)
- 05 Non-return valve
- 06 Orifice
Connections
- 401 HT water inlet
- 402 HT water outlet
- 404A HT water air vent, A-bank
- 404B HT water air vent, B-bank
- 406 HT water inlet from pre-heater
- 411 HT water drain
- 416A HT water air vent from air cooler, A-bank
- 416B HT water air vent from air cooler, B-bank
- 451 LT water inlet
- 452 LT water outlet
- 454A LT water air vent from air cooler, A-bank
- 454B LT water air vent from air cooler, B-bank
- 460 LT water to alternator
HT cooling water system on engine
The High Temperature cooling water system cools cylinder liners, cylinder heads, exhaust valve seats and the first stage of the charge air cooler.
System components
- 01 HT water pump
- 02 Water connection piece
- 03 Return pipe
- 04 Charge air cooler (HT side)
- 05 Water connection
Connections
- 401 HT water inlet
- 402 HT water outlet
- 404 HT water air vent
- 406 HT water inlet from pre-heater
- 411 HT water drain
- 416 HT water air vent from air cooler
Cooling water circulation in cylinder head
HT water to the cylinder head comes from the cylinder liner, flows around the exhaust valve seat rings and starting air delivery valve, around the fuel injection valve and continues upwards to the cylinder head water space.
The seat cooling circuit cools the exhaust valve seats and valves against thermal load.
Components
- 01 Exhaust valve seat ring
- 02 Inlet valve seat ring
- 03 Starting air delivery valve in cylinder head
- 04 Fuel injection valve
- 05 Center sleeve
- 06 Sleeve
Connections
- A Cooling water to exhaust valve seat ring
- B Cooling water to starting air valve
Water connection piece
The water connection piece on top of the cylinder head leads the HT water to the return pipe.
Components
- 01 Water connection piece
- 02 Return pipe
- 03 Flange
- 04 O-ring
- 05 Slide ring gasket
- 06 Screw
- 07 O-ring
- 08 Stud
- 09 Nut
- 10 Sleeve
Connections
- A HT water from cylinder head
- B HT water to charge air cooler
HT water venting system
The HT circuit venting pipes are connected to the expansion tank from the highest point of the piping.
The HT venting system separates and removes air from the HT water system and prevents the forming of heat transfer hindering air pockets in the air cooler.
Components
- 01 HT venting pipe from air cooler
- 02 Water connection piece
- 03 Return pipe
- 04 Charge air cooler (HT side)
- 05 Water connection
Connections
- 404 HT water air vent
- 416 HT water air vent from air cooler
LT cooling water system on engine
The Low Temperature cooling water system controls the temperatures of the second stage of charge air cooler and the lubricating oil.
Components
- 01 LT water pump
- 02 Charge air cooler (LT side)
Connections
- 451 LT water inlet
- 452 LT water outlet
- 454 LT water air vent from air cooler
- 460 LT water to alternator
LT water venting system
The LT circuit venting pipe starts from the top of the charge air cooler LT side and it is connected to the expansion tank.
The LT venting system prevents the forming of heat transfer hindering air pockets in the air cooler.
Components
- 01 LT water venting pipe
- 02 Charge air cooler (LT side)
Connections
- 454 LT water air vent from air cooler
Built-on LT and HT water pumps
The engine driven LT and HT water pumps are both centrifugal pumps driven by a gear mechanism at the free end of the engine.
The main components are made of cast iron and the shafts are made of acid resistant steel.
System components
- 01 LT water pump
- 02 HT water pump
- 03 Non-return valve
Components
- 01 Pressure housing
- 02 Impeller
- 03 Washer
- 04 Screw
- 05 Screw plug
- 06 O-ring
- 07 Suction flange
- 08 Lock nut
- 09 O-ring
- 10 Sealing flange
- 11 Oil seal
- 12 Front bearing
- 13 Housing
- 14 Shaft
- 15 Rear bearing
- 16 Retaining ring
- 17 Shaft sealing
- 18 Ring
- 19 O-ring
- 20 Bearing flange
- 21 Support ring
Connections
- A Suction side
- B Pressure side
Drive gear for cooling water pump
The LT and HT water pumps are driven by a gear mechanism at the free end of the engine.
Components
- 01 Driving gear wheel on crankshaft
- 02 Gear wheel for water pump
- 03 Clamping ring
- 04 Screw
Main engine external cooling water system
Example of the internal cooling water
Cooling water system HT-circuit on in-line engine
Pump locations
Cooling water ventilation pipes on V-engine
The built-on cooling water pumps
Reconnecting the cooling water discharge pipes
Cooling water system - LT-circuit
Venting of in-line engine water systems
Air vent
Temperature control system - AMOT-valve
Литература
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