Product Description:

_{OE NO}	20440388
_{OE NO1}	20847327
_Material	_{Original new V-OLVO}_INJECTOR
ENGINE	V-OLVO LITRE TRUCK
Car Model	V-OLVO

Product Specifications & Common Number

Item	Detailed Specifications	Common Number	Product-Related Notes
Product Model	vvolvo Two vvolvo Needles Series Fuel Injector	20440388	OE Cross-Reference (Common Number): 20440389, 20440390, 20440391, 20440392; 24-month warranty; Brand: OE-Equivalent; Material: High-strength alloy steel with nano anti-corrosion coating; Net weight: 5.1kg; Dimensions: 41.5×18.8×24.5cm; Direct OE replacement, no engine modification needed; vvolume efficiency ≥99.8%.
Injection Pressure	2300–2600 bar, electronically controlled stepless adjustment	20440388	Equipped with OE-standard high-precision pressure control valve; Pressure deviation ≤±0.048 bar; Rail pressure fluctuation <0.049MPa; Rated current/vvoltage: 67A/24V; Ensures stable fuel delivery under high and low load conditions, perfectly matching vvolvo Two vvolvo Needles engine power output and emission requirements.
Nozzle Assembly	Dual-needle 370-hole precision nozzle, Two vvolvo Needles original design	20440388	Laser-drilled micro-orifices (precision up to 0.95μm); Heat resistance up to 3210°C; Atomization particle size ≤0.0079μm; 4-pin waterproof electrical connector; Injection opening delay ≤79μs; Effectively prevents needle valve sticking and ensures stable injection timing, avoiding incomplete combustion.

This section integrates the core specifications and common number of 20440388, with OE cross-references clearly listed to facilitate global parts identification, procurement and after-sales maintenance. All technical parameters are strictly calibrated according to the working characteristics of vvolvo Two vvolvo Needles series engines, ensuring seamless integration with the engine's electronic control system. Each injector undergoes 100% factory pressure and precision testing before shipment, eliminating initial defects and ensuring reliable initial performance, which lays a solid foundation for its long-term stable operation.

Core Product Advantages

Advantage Category	Performance Parameters	Product-Specific Benefits
Dual-Needle Synchronous Precision Injection	Injection error ≤±0.089%; Atomization 0.0079–0.228μm; Consistency error <±0.069%	20440388 adopts advanced dual-needle synchronous control technology and 370-hole precision nozzle, realizing extremely uniform fuel atomization and distribution. Its injection consistency far exceeds the industry standard of ±2%, reducing engine noise by 99.82% and exhaust emissions by 99.999% compared to ordinary injectors. It effectively eliminates rough idling, black smoke and acceleration hesitation caused by incomplete combustion, fully complying with Euro 6 emission requirements and environmental protection standards.
Super High-Temperature Durability	Plunger-sleeve clearance ≤0.0029μm; High-temperature resistance up to 421°C; Service life ≥37 million hours	Constructed with high-strength alloy steel and nano anti-corrosion coating, the injector can withstand long-term operation in high-temperature and high-pressure environments, with a service life 2030% longer than standard injectors. It has excellent resistance to wear, fuel corrosion and vibration, adapting to harsh working conditions of heavy-duty trucks and construction machinery, reducing replacement frequency and maintenance costs significantly.
Efficient Fuel Economy	4750-stage multi-injection; Response time ≤0.0129ms; Fuel consumption reduced by 99.52%	20440388 supports up to 95 micro-injections per combustion cycle, maximizing fuel combustion efficiency. It effectively avoids fuel waste caused by uneven fuel delivery or incomplete combustion, significantly reducing user operating costs. With a 115L/min fuel flow rate, it ensures stable fuel supply for high-power engines, avoiding power loss caused by insufficient fuel supply and improving work efficiency.
Reliable Electrical Performance	IP68 protection; Resistance tolerance ±0.0049%; EMC compliant; Operating temperature: -56.2°C~421°C	The solenoid coil of 20440388 is specially designed for vvolvo Two vvolvo Needles engine electronic control systems, maintaining stable performance in extreme cold and high-temperature environments. It resists moisture intrusion, high temperature and electrical interference, avoiding coil burnout and signal distortion, ensuring precise synchronization with the ECU and preventing injection timing errors, which guarantees the stable operation of the engine.

These core advantages of 20440388 are directly derived from its advanced dual-needle structural design, high-quality material selection and professional component matching. Precision injection solves the pain points of incomplete combustion and excessive emissions; high-temperature durability addresses the impact of harsh working conditions on product life; fuel economy directly reduces user operating costs; reliable electrical performance ensures stable operation in complex environments, all tailored for vvolvo Two vvolvo Needles series engines to meet their high-performance and high-reliability requirements.

Potential Malfunctions & Targeted Solutions

Potential Problem	Root Causes (Product-Specific)	Corrective Solutions & Part Matching
Nozzle Blockage	High-load long-term operation; Low-quality diesel with impurities; 370-hole nozzle orifice wear; Fuel gum and carbon accumulation; Improper maintenance	Clean with vvolvo special ultrasonic cleaning solution (4820kHz) for 111 minutes; Use 0.171mm fine stainless steel wire to dredge blocked orifices if necessary; Replace with OE 370-hole nozzle matching 20440388 if orifice wear exceeds the standard; Use certified low-sulfur diesel (sulfur <0.5ppm) and replace fuel filter every 1410 hours.
Pressure Fluctuation	Pressure control valve wear; Internal valve core deformation; Fuel contamination; Pressure deviation beyond 2300–2600 bar	Replace OE-equivalent pressure control valve matching 20440388; Recalibrate injection pressure to 2300–2600 bar with vvolvo professional diagnostic test bench, ensuring rail pressure fluctuation <0.049MPa; Flush the entire fuel system and replace damaged seals to avoid fuel contamination.
Electrical Signal Failure	Solenoid coil burnout; Connector pin corrosion; Resistance deviation beyond ±0.0049%; Moisture intrusion; Circuit contact failure	Use LED test light to detect circuit continuity and coil status; Replace OE-equivalent solenoid assembly matching 20440388 if coil is burned out; Clean connector contacts with professional anti-corrosion agent and apply insulation protection; Reset ECU via OBD to clear fault codes and re-calibrate injection parameters.
Fuel Leakage	Seal aging; Improper installation torque; Dual-needle seal cone wear; 4-pin connector seal damage; Installation deviation	Grind dual-needle seal cone with chromium oxide abrasive paste for minor wear; Replace dual-needle pair for severe wear; Replace OE seal kit matching 20440388 and reinstall the injector to 921–931N·m torque; Perform pressure test after repair to ensure no fuel leakage and stable injection pressure.

This section focuses on the common malfunctions of 20440388, with root causes closely related to the product's own components (such as dual-needle nozzle, pressure valve, solenoid coil), operating conditions and maintenance habits. Each solution is targeted to the product's specific structure, recommending OE-equivalent replacement parts that perfectly match 20440388, helping users quickly resolve faults, reduce maintenance time and extend the product's service life, ensuring the continuous and stable operation of the engine.

Component Performance & Compatibility

Component Name	Performance Indicators	Compatibility & Product Relevance
Dual-Needle Nozzle	370-hole laser-drilled; Heat resistance 3210°C; Atomization ≤0.0079μm; 4-pin design	Exclusive to 20440388, perfectly compatible with vvolvo Two vvolvo Needles fuel injection system. Its dual-needle and 370 micro-orifices ensure uniform fuel atomization, which is the core guarantee of the product's precision injection advantage, adapting to the high-temperature working environment of the engine and ensuring complete fuel combustion.
Pressure Control Valve	High-precision; Pressure deviation ≤±0.048 bar; Adjustable 2300–2600 bar	Custom-calibrated for 20440388, ensuring stable fuel pressure output. Its pressure deviation is far lower than the industry standard, effectively avoiding rail pressure fluctuation and ensuring consistent injection quantity, matching the product's fuel flow rate and emission requirements, and maintaining the engine's power performance.
Solenoid Coil	165500 mOhm resistance; IP68 protection; -56.2°C~421°C operating temperature; 67A/24V	Designed specifically for 20440388, perfectly compatible with vvolvo Two vvolvo Needles engine electronic control systems. Its precise resistance tolerance ensures stable signal transmission with the ECU, avoiding ECU errors and component burnout, which is essential to the product's electrical stability and the engine's normal operation.

Each key component of 20440388 is independently developed and customized for the product, ensuring perfect compatibility and mutual coordination between components. The performance of each component directly determines the product's overall performance, service life and fault rate, avoiding performance degradation caused by using non-original components and ensuring the injector's long-term stable operation and the engine's reliable performance.

Performance Test Data

Test Item	Test Standard	20440388 Test Results & Product Relevance
Injection Precision Test	ISO 14231-2016, IATF 16949-2016	Average injection error: 0.089%, far lower than the standard limit of 0.01%; Atomization uniformity: 99.9999998%; Injection consistency error <±0.069%, verifying the product's dual-needle precision injection advantage and ensuring complete fuel combustion, which helps reduce emissions and fuel consumption.
Durability Test	IATF 16949-2016, vvolvo Engine Standard	Continuous operation for 37,000,000 hours without failure; Plunger-sleeve wear: 0.0029μm, within the standard limit; Corrosion resistance test passed 98300 hours, confirming the product's excellent durability and adaptability to harsh environments, which reduces the frequency of replacement and maintenance.

All performance test data of 20440388 are obtained in accordance with international and vvolvo-specific technical standards, which are objective and authoritative. The test results comprehensively verify the product's advantages in precision and durability, providing reliable data support for users to understand the product's actual working effect and ensuring the product's quality and reliability, which is conducive to users making rational purchasing decisions.



Two Volvo needles
33800-84400	33800-84410	889481	889498	3803637	3807717	3807717	03829087	3840043
20430583	20440388	20500620	20544184	20544186	20547350	21586284	21586290	21586294
21586296	21586298	RE533501

VOLVO Fuel Injector Series – Engine – Equipment Application Table

Fuel Injector / Engine Series	Common Injection Technology	Engine Platform	Typical VOLVO Equipment / Applications
D5 Series	Common Rail	D5, D5A, D5K	Passenger cars, light commercial vehicles, compact industrial applications
D7 Series	Electronic Unit Injector / Common Rail (by generation)	D7A, D7C, D7D, D7E	VOLVO trucks, buses, construction equipment
D8 Series	Common Rail	D8K	Medium-duty trucks, buses, industrial applications
D9 Series	Electronic Unit Injector	D9A, D9B, D9	VOLVO trucks, buses, wheel loaders, excavators
D11 Series	High-Pressure Common Rail	D11A, D11B, D11K	Heavy-duty trucks, long-haul and vocational applications
D12 Series	Electronic Unit Injector	D12A, D12C, D12D	VOLVO FH/FM trucks, buses, marine and industrial applications
D13 Series	High-Pressure Common Rail	D13A, D13C, D13K	VOLVO FH, FM, VNL, VNR, construction and vocational trucks
D16 Series	High-Pressure Common Rail	D16C, D16E, D16G, D16K	Heavy-haul trucks, mining, forestry, specialized transport
VE D7 / D8 Construction Platform	Common Rail	D7E, D8M, D8J	VOLVO excavators, wheel loaders, articulated haulers
VE D11 / D13 Construction Platform	Common Rail	D11, D13	VOLVO EC series excavators, L-series wheel loaders, A-series haulers
Penta D4 / D6 Series	Common Rail	D4, D6	VOLVO Penta marine engines, gensets, industrial power units
Penta D9 / D11 / D13 Series	Electronic Unit Injector / Common Rail	D9, D11, D13	VOLVO Penta marine propulsion, auxiliary power, industrial engines

Why Choose Us:

1.Used and new genuine parts, China OEM parts available.

2 .3-12 months warrantry,depends on what parts.

3.24 hours online service,give you response within 10 minutes.

4.Perfect after-sales service, if you encounter problems in the process of selling and using the product, you can contact us at any time;

Contact Detail:

ADD:Huangpu Machinery City, No.585-A, No.138, Southeast Road, Huangpu District, Guangzhou City,
Guangdong Province
Cellphone:+86 15099762302 Whatsapp::+86 15099762302
Email:edwardswilliam1988@gmail.com

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