Auxiliary Engine

Your Professional Auxiliary Engine Accessories Supplier!

HAISTAR MARINE LTD is one of the professional marine service providers in China since 2020. With strong global resources and reliable quality, we can provide ship spares parts, stores, maintenance, warehousing and delivery onboard services to the shipowners and ship management companies all over the world.

Why Choose Us

Wide Range of Supply

We have a wide range of marine spare parts supply, covering European, Korean, Japanese and Chinese manufacturing, providing original, OEM and replacement spare parts for ships.

Quality Control

We strictly follow the requirements of quality management system and environmental management system to ensure stable quality and reliable products for our valuable customers.

Professional Team

We have an experienced technical team that enables us to provide onboard repair and installation, technical support and other related services.

24-Hour Online Service

We provide 24/7 service, which means you can reach us at any time should you require assistance. We will make every effort to respond promptly and offer effective solutions.

Our Best-Selling Auxiliary Engine Accessories

Auxiliary Engine Exhaust Valve

The inlet and exhaust valves are processed with high-end materials, especially Nimonic80A material, which is a nickel-based superalloy with a large amount of nickel, chromium, cobalt and a small amount of aluminum, titanium, tungsten and other elements.

Auxiliary Engine Plunger

The plunger is the core component of diesel engine fuel injection system, which is the main component of controlling fuel injection quantity and injection time of diesel engine. Its main function is to inject high pressure diesel into the diesel engine combustion chamber, so that it mixes with the air and burn to generate power.

Auxiliary Engine Nozzle

Nozzle and needle are one of the important parts of diesel engine, which has high requirements for materials, production processes, and matching accuracy. Therefore, it is necessary to strengthen the cleaning of the fuel system and the maintenance of the injector in the process of using.

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Auxiliary Engine Exhaust Valve Specification

Name	Intake and exhaust valve
Category	Auxiliary engine spare parts
Brand	Yanmar/daihatsu/man b&w
Specifition	As per your requirement
Material	23-8n with stellite / nimonic 80a
Place of original	Genuine/china authoried factory/high quality korea parts
Packing	Standard packing
Condition	Brand new
Terms of delivery	Exw
Price	To be negotiated
Ports	China ports and other ports in the world

Functions of Auxiliary Engine Exhaust Valve

The camshaft of the auxiliary engine exhaust valve is connected to the crankshaft via chains or gears. Once the cam is in the cam profile, the hydraulic oil pump will overcome the spring force and the oil will be delivered to the auxiliary engine exhaust valve at high pressure.

The pressure at which the hydraulic oil operates the auxiliary engine exhaust valve can go up to 150 – 220 bars.

Hydraulic oil chamber and the operating piston is on the top of the valve spindle.

As the hydraulic oil pushes the operating piston, which is connected to the valve spindle, the valve will move down and allow the exhaust inside the cylinder to flow out of the engine to exhaust trunk.

There is a spring air piston chamber which has an air supply connection. As the valve opens, the air underneath the piston is compressed. The expansion of this compressed air, when the hydraulic pressure is relieved assists in the closing of the valve.

Once the hydraulic oil pump roller comes off the cam profile, into the cam circle, the spring pressure will cut the supply of the hydraulic oil. Now the air supply, under the spring air piston, will close the valve and seal it with the valve seat, stopping the flow of the exhaust out of the cylinder. The air pressure is approx. 7 bar to close the valve.

The oil remaining in the hydraulic oil chamber is taken out from the drain valve when the valve is closing due to air pressure.

To prevent the possibility of an air lock, the hydraulic system has a small leak off at the top of the auxiliary engine exhaust valve hydraulic cylinder. Oil is made up via a non-return valve.

A damping arrangement on top of the piston in the auxiliary engine exhaust valve prevents hammering of the valve seating. In most of the modern engine, air pressure is used to close the valve.

Main Supply Models of Auxiliary Engine Exhaust Valves

YANMAR

6N18 AL-UV, 6EY18AL, 8N21AL-GV, M200,M220.

DAIHATSU

5DK-20, 6DK-20, DL16, DL20, DC17.

MAN B&W

L16/24, L20/27, L21/31, L23/30, L28/32.

SUZER

RTA68/RTA72/RTA76.

CUMMINS

6CT8.3, NT(A)855, KTA19, KTA38, KTA50, QSK19, QSM11.

Auxiliary Engine Plunger Specification

Name	Plunger
Category	Auxiliary engine spare parts
Brand	Yanmar/daihatsu/man b&w/suzer/cummins
Specifition	As per your requirement
Material	Standard material
Place of original	Genuine/high quality korea parts
Packing	Standard packing
Condition	Brand new
Terms of delivery	Exw
Price	To be negotiated
Ports	China ports and other ports in the world

Auxiliary Engine Plunger Features

High durability to withstand high pressure up to 160 MPa. Compatible with various fuel oils.

Customization Process

Communication

Please provide detailed specifications so that we can have further professional discussions.

Production Execution

Based on the confirmed design, we will strictly implement a refined production process and enforce strict quality control measures at each stage to ensure high consistency and accuracy of the product.

Quality Inspection and Packaging

After the product is produced, we will conduct a comprehensive and systematic quality inspection process to ensure that all products meet established quality standards. We will customize the packaging according to your specific needs.

Delivery Arrangement

We will strictly abide by the terms of the contract and complete timely delivery of the product within the agreed timeframe to ensure that your time requirements are met.

Packaging and Shipping

Packaging	Film, wooden box or carton
Transportation methods	Road transport, rail transport, sea transport, air transport

Our Certificate

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FAQ

Q: What is the function of the exhaust valve in auxiliary engine?

A: An exhaust valve is a valve that releases burned gases from a cylinder. The exhaust valve closes during the initial part of the induction stroke. The inlet valve usually opens a little before top dead center and the exhaust valve remains open a little after top dead center.

Q: How does auxiliary engine exhaust valve work?

A: As the hydraulic oil pushes the operating piston, which is connected to the valve spindle, the valve will move down and allow the exhaust inside the cylinder to flow out of the engine to exhaust trunk.

Q: What are the benefits of auxiliary engine exhaust valves?

A: Improved efficiency: A super quick exhaust valve reduces energy consumption and operating costs by releasing pressure promptly and efficiently. It also prevents pressure buildup, which may damage equipment and cause safety hazards.

Q: When should the auxiliary engine exhaust valve open?

A: As we move closer to the bottom of the cylinder, a little before the piston reaches the bottom, the exhaust valve begins to open. By this time most of the charge has been burned and the cylinder pressure will begin to push this burnt mixture out into the exhaust port.

Q: What is the function of plunger in diesel engine?

A: Plunger which enables the timing of the fuel injection to be controlled in accordance with the engine load, and can be used to prevent the emission of exhaust smoke and to achieve quieter engine operation, and under full-load conditions enables the engine to regain speed rapidly.

As one of the leading auxiliary engine suppliers in China, we warmly welcome you to wholesale cheap auxiliary engine in stock here and get quotation from our factory. All customized products are with high quality and low price.

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