Marine Engine fuel injection system

The Marine Engine fuel injection system is one of the most important parts of a marine diesel engine. A fuel injection system does the work of providing the right amount of fuel to the engine cylinder at the right moment. It is also extremely important that the fuel injected inside the engine enters the cylinder at the right combustion situation for the highest combustion efficiency. It is for this reason that there is a need for a measured fuel supply system that times and monitors the delivery of the fuel and oil in the combustion chamber. This timing device helps to have perfect atomization of the fuel. The device is known as a fuel injector.

Fuel Injection System pictures and Sketch

Fuel injection is done with the help of cams and camshaft. The speed of the camshaft is the same as the engine speed in a two-stroke engine and half the engine speed in a four-stroke engine. The adjacent fuel injection system diagram gives a broad view to the reader regarding the fuel injection system. The faded sketch shows the engine in the background, whilst the dark-colored schematic represents the fuel system. This helps the reader to understand the concept with the given theory.

The injection system comprises the most important part, which combines both mechanical and hydraulic operations. We know this as the Jerk Pump.

Jerk Pump

The Jerk pump system comprises individual fuel injectors for each cylinder. This means that the injection of each cylinder is exclusive to each other. The injector pump is operated once every cycle using the cam and camshaft. In order to ensure that the camshaft and the injection run simultaneously to deliver the perfect timing of fuel injection, the barrel and plunger of the injector pumps are selected of appropriate size to suit the engine fuel requirements. The fuel delivery is facilitated with the help of ports in the barrel and slots in the plunger or adjustable spill valves.

All the injector valves are preset to a specific pressure. The needle of the valve lifts exactly to this pre-set pressure, ensuring that the fuel completely atomizes once it enters the cylinder.

Two types of fuel pumps

• Valve control discharge type
• Helix or helical edge pump

The valve control discharge type pump is generally found on slow speed two-stroke engines and the helix type is found on high or medium speed four-stroke engines.

Common Rail

In the common rail system, each cylinder doesn’t have an individual fuel pump, but only one high-pressure multiple fuel plunger pumps for all the cylinders. A manifold or rail is where the fuel accumulates at high pressure before entering the cylinders. This common-rail supply fuel to all the cylinders. A timing valve in provided between the rail and the injector to control the timing and extent of fuel delivery. The common rail is also provided with spill valves to release excess pressure. The injectors in a common rail system are often known as fuel valves.

Engine fuel injection system Spares:

Engine fuel injection system Brands

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：
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

 

• Ship spare parts S60MC S50MC S80MC K80MC K90MC Cylinder liner
• Fuel Oil System for Marine Diesel Engine
• Oil Lubrication Stern Shaft Seal
• Construction Materials used in Marine Diesel Engines
• Cylinder Liner S60MC S50MC S42MC S35MC S26MC Spare Parts
• Circulation System in a modern ship