Common rail fuel injection nozzle assembly

The S.P series of long bore and pintle common rail fuel injection nozzle assembly pairs produced by Huahui Oil Pump and Nozzle Company are suitable for 60 - 135 cylinder bore series diesel engines: the product performance is reliable, and its performance indicators rank among the top of similar products in China. It has been praised by users for many years. Quality trustworthy products.

Designed for high-precision fuel control, the matching error of couples is <±1μm, and the working pressure covers 50-300bar. It supports ethanol-gasoline blended fuels. It has passed IATF 16949 certification and is suitable for passenger car GDI and industrial diesel engines. There is no need to disassemble the assembly during maintenance, and performance can be restored by directly replacing the matching parts.

 

Product Introduction

The Common Rail Fuel Injection Nozzle Assembly is a key component in modern diesel engine fuel systems, designed to deliver precisely metered and atomized fuel into the combustion chamber. This assembly works with electronically controlled common rail systems, enabling multiple injections at ultra-high pressure (up to 2,500 bar). The result is improved combustion efficiency, enhanced power output, and reduced emissions. Built with advanced materials and tight manufacturing tolerances, this nozzle assembly supports high-speed operation and complies with strict global emission standards like Euro VI and EPA Tier 4.

 

Product Advantages

High Precision Injection: Enables multiple injection events (pilot, main, post) for optimized combustion, reduced noise, and improved throttle response.

Ultra-High Pressure Capability: Withstands injection pressures up to 2,500 bar for better atomization, increased engine power, and lower fuel consumption.

Low Emissions: Designed to meet stringent emissions regulations by improving fuel-air mixing and reducing unburnt hydrocarbons, NOx, and particulates.

Durable and Reliable: Constructed with wear-resistant components and corrosion-resistant alloys for long service life, even with varying fuel qualities.

Compatible with ECU Systems: Fully integrated with electronic control units for real-time adjustment of injection timing and quantity.

 

Product Applications

The Common Rail Fuel Injection Nozzle Assembly is widely used in various industries and diesel-powered systems, including:

Automotive: Light-duty and heavy-duty diesel vehicles such as passenger cars, trucks, buses, and vans.

Construction Equipment: Excavators, wheel loaders, bulldozers, and cranes requiring efficient high-performance engines.

Agricultural Machinery: Tractors, combines, and harvesters with electronically controlled diesel engines.

Industrial Generators: Diesel-powered generator sets used in factories, hospitals, and backup power systems.

Marine Engines: High-speed diesel propulsion systems in small commercial vessels and yachts.

 

FAQ

How many production lines in your factory?

5 production lines.

 

How long is your delivery time?

One week for spot goods, 60 days for orders.

 

What is the role of a common rail nozzle assembly in a diesel engine?

It delivers finely atomized fuel at high pressure into the combustion chamber, controlled by the ECU for precise timing and quantity.

 

How is this different from traditional mechanical nozzles?

Unlike mechanical nozzles, common rail nozzles are electronically controlled and can perform multiple injections per cycle, improving efficiency and reducing emissions.

 

Can the nozzle assembly be serviced or cleaned?

Some minor servicing is possible, but due to the high precision required, damaged or worn nozzle assemblies are typically replaced rather than repaired.

 

Is it compatible with biodiesel or alternative fuels?

Yes, many models are compatible with low-blend biodiesel (e.g., B5, B20), but always confirm with the engine manufacturer to ensure proper operation.

 

What is the expected lifespan of a common rail nozzle assembly?

Typically, these components last 150,000–250,000 km or 4,000–6,000 hours, depending on fuel quality, driving conditions, and maintenance practices.

 

Company Introduction

Changzhou Huahui Fuel Injection Equipment Co.,Ltd's main products include S and P series long and short injector assembly and injector nozzle parts. Injection pumps used in 165-1125 single-cylinder engines and plungers and oil delivery valve parts used in injection pumps. In recent years, with the efforts of our scientific research personnel, we have successively developed P series BQ type, PW type, P7 type, P8 type, PE type, PN type, P7100 type, P2000 type, high-pressure common rail series, etc., a total of more than 100 types of plunger parts and electronically controlled single pumps.