Marine Engine Fuel Pump

The marine fuel pump is a part of a vessel that supplies fuel from a fuel container to the carburetor of an IC engine. The main fuel pump is to control the quantity and timing of the fuel injected into the combustion space and to provide the high fuel pressure required to hydraulically operate the fuel injector.

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Marine Engine Fuel Pump:

A Marine Engine Fuel Pump is a part of a ship that supplies fuel from a fuel container to the carburetor of an internal combustion engine. The main fuel pump controls the amount and timing of fuel injected into the combustion space and provides the high fuel pressure required to hydraulically operate the fuel injection. Late or early injection can result in insufficient power and engine damage.

Fuel injection is done with the help of cams and camshafts. The cams mounted on the camshaft operate the fuel pump driven by the crankshaft, one for each cylinder. The speed of the camshaft is the same as the engine speed of a 2-stroke engine, while the speed of a 4-stroke engine is half the engine speed.

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Basic Working principle of fuel pump

As the cam rotates, it operates a spring-loaded plunger (plunger) that moves up and down in a cylinder (barrel). As the plunger moves up, the fuel pressure in the barrel above the plunger rises rapidly. The high-pressure fuel then opens the fuel valve (injector) and sprays it into the cylinder in tiny droplets called atomization. It is important to note that injection only occurs when the plunger moves up the cam ramp.

2 Types of Fuel Pump

Port-Controlled Helix Jerk Pump

This is a common fuel pump, widely used in MAN B&W engines as well as 4-stroke engines.

The fuel pump includes a cam-operated single-acting plunger with a fixed stroke. A helix is machined into the plunger, and the helix also forms a vertical groove and an annular groove at the bottom of the helix. The plunger reciprocates inside the barrel, the pump body has overflow ports that connect to the suction side of the pump, and when the cams are on the base circle, they drill holes above the top of the plunger. The plunger is keyed to the sleeve, and a gear (pinion) is machined in the sleeve. The pinion meshes with a rack that rotates the plunger relative to the barrel. The frame is connected to the engine governor.

During the down stroke, the pump barrel is filled with oil through the suction port. During the upward stroke, the plunger covers the suction and overflow ports. The onset of injection is constant, achieved by the fuel pressure rising above the spring-loaded delivery valve preset pressure. The delivery ends when the edge of the spiral emerges from the overflow. The start of injection is initially set and constant. It starts when the top edge of the plunger covers the suction port and the pressure is greater than the delivery valve setting. The end of the spray is variable and controlled by the spiral edge that exposes the spill. (This can be changed by moving the rack and pinion mechanism that rotates the plunger and screw). The oil spill port spills fuel back to the suction side.

Suction and Spill Controlled Fuel Pump

A common plunger reciprocates in the barrel. As the plunger moves up and down, two pivot levers operate the push rod, opening the suction and relief valves. When the cam follower is on the base circle of the cam, the suction valve opens and the overflow valve closes. When the plunger moves up the barrel, the suction push rod moves down and the suction valve closes. Injection then begins, and fuel is delivered to the injector through the one-way valve. As the plunger continues upward, the overflow plunger will open the overflow valve, the pressure above the plunger will drop, and the injection will stop.

Main Engine Fuel Pump Spares:

Bed Plate Spares

Marine Engine Fuel Pump Spares:

Products Brands 1 - Noah Marine Services

We offer the Brands and Spear parts:

SULZER:
RD68	RND76	RND76M	RND90	RND90M
ZL40/48	RTA62	RND68M	RTA84	16ZAV40S
RLA90	RTA72	RTA84M	RTA84C	RND68
RTA52	RTA58	RTA76	RLB90	RTA48(T)
RTA38	RTA76	RTA96	RLA(B)56	RLA(B)66
RLA(B)76	RF44	RF56	TAD36	TAD48

MAN:
40/54A	52/90N	57/80C	KZ57/80F
KSZ70/125	KSZ78/155	90/160A	52/55
L58/64	90/190CL	60/105E	70/120E
70/125CL	KSZ78/155A	KSZ70/125BL	52/55A, 40/45

B&W:
L35MC	L60MC	L80MC	L55GF	L55GFCA
L80GFCA	L80GB	74VT2BF	K62EF	K74EF
K84EF	K45GFC	K67GF	K80GF	K90GF
S45HU	L70MC	L50MCE	S60MC	S70MCE
K80MC	S80MC	K90MC-C	L67GFCA	L90GBE
K45GF	L45GF	L67GF	L80GF	L90GF
S35MC	L42NC	S42NC	L50MC	S60MC
L70MC	L80MC	L90MC	S90MC	50VT2BF
62VT2BF	K84EF

MITSUBISHI:
UEC37L/LA/LS	UEC45HA	UEC60L/LA/LS
UEC45L/LA/LS	UET45/75C	UEC52/125H
UEC52L/LA/LS	UET45/80D	UEC52/90D
UEC(T)52/105D	UEC45/115H	UEC37/88H	UEC37H

PIELSTICK:
PA6	PC3	PC2-2	IHI PC2-5	PC4
PC2-6	PC4-2L	PC4-570	PA5

AKASAKA:
UET45/80D	UEC52/105D	DM51SS	UEC 60/150H	UEC 60HA
A31	A34	A37	A41	AH27
AH28	AH30	AH36	AH38	AH40
DM30	DM36	DM38	DM46	DM47

DEUTZ:
RBV8M358	RBV8M540	RBV16M640	TBD620L6
BVM350	BVM540	BF6M716

HANSHIN:
EL30	EL32	EL35	EL40	EL44
LH28RG	LH31G	LU28(A,R,G)	LU32	LU35
LU38	LU46(A)	LU50	LU54	LUN28
LUN30	LUD32	LUD35	LUS38

NIIGATA:
MG40X(EX)	M34X	6M28BFT	M31X

MAK:
M332	M453AK	MU551AK	MU552AK	M601
MU452AK	451AK	6M453AK	9M453C	6M601C
8M601

WARTSILA:
22	32	31	26	20
S28	38	46	32GD	46GD
14TK	R22HF	R-V32	NOHAB

DAIHATSU：</div >
PS-18	PS-22	PS-20	PS-26	PS-30
PKT-14	PKT-16	PKTD-16	DS-18	DS-22
DS-26	DS- 28	DS-32	DL-14	DL-16
DL-19	DL-20	DL-22	DL-24	DL-26
DK-20	PL-24

CUMMINS:
4BT3.9	6BT(A)5.9	6CT8.3	NT(A)855	N14
KTA19	KTA38	KTA50	QSK19	QSM11

CATERPILLAR:
3054	3056	3066	3106	3126
3306	3406	3408	3412	3508
3512	3516	3606	3608	3612
3616	3618	C1.5	C2.2	C7
C9	C10	C12	C15	C16
C18	C30	C32

SCANIA:
DI 09	DI 13	DI 16

Main bearing From Wikipedia:

A fuel pump is a component in marine ships that transfers liquid from the fuel tank to the carburetor or fuel injector of the internal combustion engine. … See more on Wikipedia.

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