Product Introduction
Auxiliary Engine Plunger is a precision mechanical component in the auxiliary engine fuel system. It is mainly used in the fuel pump to pressurize the fuel and deliver it to the injector through reciprocating linear motion.
Product Details
|
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 |
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Packing |
Standard packing |
|
Condition |
Brand new |
|
Terms of delivery |
Exw |
|
Price |
To be negotiated |
|
Ports |
China ports and other ports in the world |
Main Offered Models
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
Main Supplied Range
Connecting rod,piston, piston ring, suction and exhaust valve,nozzle assy, nozzle holder, outlet valve, fuel injection valve, inlet and outlet valve, valve seat, bearing bush, cylinder liner, cylinder head, seal, nozzle ring, friction plate, plunger, auxiliary tool, copper sleeve, paper element.
Advantages
Wear-resistant
Auxiliary Engine Plunger is made of high-strength alloy steel. After nitriding and surface hardening treatment, the surface hardness can be stabilized at HRC64~66, and the anti-wear depth of the friction pair matching area is 0.5mm.
High injection accuracy
The product uses precision cylindrical grinding technology to control the clearance of the matching area between the plunger and the sleeve to 2.5μm±0.5μm, the sliding fit error does not exceed 0.003mm, and the fuel injection deviation is less than ±1.8%.
High temperature and high pressure resistance
The thermal expansion coefficient of the material used in the Auxiliary Engine Plunger is controlled at 11.5×10⁻⁶/K. After 100 hours of thermal fatigue test in a continuous combustion chamber environment at 280℃, the dimensional change rate is less than 0.01%.
Delivery And Shipping Service
24*7 hours online, our services cover all main ports in the world, we can provide the cost and time saving logistics solution to our customers, to provide you with one stop comprehensive services.
FAQ
Q: What is Auxiliary Engine Plunger?
A: It is a key component in the fuel injection pump. It controls the quantitative injection of fuel through reciprocating motion and is one of the core components of the engine fuel system.
Q: What material is the plunger usually made of?
A: High-carbon alloy steel or nitrided steel is commonly used, which is heat-treated and surface-strengthened to improve wear resistance and corrosion resistance.
Q: What are the main dimensional parameters of the plunger?
A: The key parameters include plunger diameter, length, stroke, guide surface accuracy, fit tolerance, etc., which need to be closely matched with the pump body.
Q: How high is the fit accuracy between the plunger and the pump sleeve?
A: It is generally an interference fit with a clearance at the micron level to ensure sealing and prevent fuel leakage and pressure loss.
Q: What are the surface treatments of the plunger?
A: The surface is usually nitrided, precision ground or chrome-plated to improve hardness and surface finish and extend service life.
Q: What are the common plunger failures?
A: Problems such as wear, jamming, pressure relief, and loose fit can lead to insufficient fuel injection, difficulty in starting the engine, or unstable operation.
Q: Can the plunger be replaced individually?
A: It can be replaced individually, but it is recommended to replace the plunger and pump sleeve in pairs to ensure sealing and running-in consistency.
Q: How to determine whether the plunger is worn?
A: Determine the plunger status by measuring the clearance, observing fuel leakage, checking the injection pressure and starting performance.