s90mec7

MAN B&W MC/MC-C, ME/ME-C/ME-GI/ME-B engines

The introduction of the ME engines has given rise to the following modifications:

•The camshaft has been omitted

•The mechanical type fuel pumps have been replaced by the electronically controlled fuel injection system

•A Hydraulic Power Supply (HPS) unit has been introduced either mounted on the engine and engine driven (EoD 440 160) or separately mounted and electrically driven, option 4 40 660.

As a consequence, the main pipes for camshaft lubrication and exhaust valve actuation have been omitted.

The lubricating oil is pumped from a bottom tank, by means of the main lubricating oil pump (4 40 601), to the lubricating oil cooler (4 40 605), a thermostatic valve (4 40 610) and, through a full flow filter (4 40 615), to the engine inlet RU, Fig. 8.01.01.

RU lubricates main bearings, thrust bearing, axial vibration damper, piston cooling, crosshead bearings, crankpin bearings. It also supplies oil to the Hydraulic Power Supply unit and to moment compensator and torsional vibration damper.

Lubrication of turbochargers

Turbochargers with slide bearings are normally lubricated from the main engine system. AB is outlet from the turbocharger, see Figs. 8.03.01 to 8.03.04, which are shown with sensors for UMS.

Figs. 8.03.01 to 8.03.04 show the lube oil pipe arrangements for different turbocharger makes.

MAN B&W ME/ME C/ME GI engines

Hydraulic Power Supply Unit

Internally on the engine RU is connected to the Hydraulic Power Supply unit (HPS) which supplies the hydraulic oil to the Hydraulic Cylinder Units (HCUs). The HPS unit can be either mounted onto the engine and engine driven (EoD 4 40 160) or delivered separately electrically driven, option 4 40 660. See figs. 16.01.02 and 16.01.03 respectively.

The hydraulic power supply unit shown in Fig. 8.02.01, consists of:

•an automatic main filter with a redundance filter, in parallel

•two electrically driven pumps

•three engine driven pumps

•an safety and accumulator block

RW is the oil outlet from the automatic backflushing filter.

At start one of the two electrically driven start up pumps is activated, and it is stopped as soon as the three engine driven pumps have taken over the hydraulic oil supply.

The hydraulic oil is supplied to the Hydraulic Cylinder Units (HCU) located at each cylinder, where it is diverted to the electronic Fuel Injection system, and to the electronic exhaust Valve Activation (FIVA) sy stem, which perform the fuel injection and opens the exhaust valve. The exhaust valve is closed by the conventional ‘air spring’.

The electronic signals to the FIVA valves are given by the Engine Control System, see Chapter 16, Engine Control System (ECS).

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The Hydraulic power supply is available in 2 versions

The standard version, EoD 4 40 660, is the classic ME power supply where the hydraulic power is generated by engine driven pumps and start up pressure is created by electric driven start pumps. The capacity of the start up pumps is only sufficient to make the start up pressure. The engine can not run with the engine driven pumps out of operation.

The optional version, EoD 4 40 661 is similar to the standard version, but the electric driven start up pumps have a capacity sufficient to give Take Home power at least 15% engine power. The electric power consumption should be taken into consideration in the specification of the auxilliary machinery capacity.

MAN B&W ME/ME-C/ME-GI engines

MAN B&W ME/ME-C/ME-GI engines

Lubricating Oil Pipes for Turbochargers

&ROMæSYSTEMæOIL

%

!"

Fig. 8.03.01: MAN Diesel turbocharger type TCA

From system oil

PI 8 03

PT 8 03 I AL

ABB TPL turbocharger TI 8 7

TE 8 7 I AH

AB

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MAN B&W MC/MC C, ME/ME-B/ME C/ME GI engines, Engine Selection Guide

MAN B&W MC/MC C, ME/ME-B/ME C/ME GI engines, Engine Selection Guide

MAN B&W MC/MC-C, ME/ME C/ME GI/ME-B engines, Engine Selection Guide