enLanguage
Home / Products / Bosch Parts / Bosch Injector / Content

Products

0445116011 Injector – Nozzle Exit Geometry & Jet‑Induced Swirl for Enhanced Air Entrainment and Reduced Soot
video
0445116011 Injector – Nozzle Exit Geometry & Jet‑Induced Swirl for Enhanced Air Entrainment and Reduced Soot

0445116011 Injector – Nozzle Exit Geometry & Jet‑Induced Swirl for Enhanced Air Entrainment and Reduced Soot

1. Product:0445116011
2. Compatible Equipment: Diesel Fuel Injection Systems
3. Manufacturer: Aftermarket OEM Replacement
4. Condition: Brand New, Fully Tested
5. Origin: ABOSEDE Diesel
6. Shipping period: 3-5 business days
7. Payment terms: T/T, Western Union, PayPal

Send InquiryChat Now
  • Fast Delievery
  • Quality Assurance
  • 24/7 Customer Service
Product Introduction

Fuel atomisation quality is typically attributed to injection pressure, but the nozzle exit geometry plays an equally decisive role in determining droplet size and spray dispersion. The 0445116011 is a solenoid‑actuated CRI 2 injector that features a conical‑divergent outlet-a subtle expansion angle (6°) at the exit of each of its five 0.133 mm injection holes. This geometry modifies the flow velocity profile at the point of jet exit, inducing a mild radial velocity component that promotes air entrainment along the spray periphery. The result is a 12‑15% reduction in the Sauter mean diameter (SMD) of the fuel droplets compared to a straight‑bore nozzle of the same hole size, without increasing the spray penetration that would cause wall impingement. This injector's defining characteristic is its air‑entrainment efficiency-the ratio of entrained air mass to fuel mass, which reaches 12:1 at 1,200 bar, compared to 9:1 for standard nozzles. This improved mixing reduces particulate emissions and enhances combustion efficiency across the engine's operating range. This article examines the conical‑divergent exit geometry, the resulting spray characteristics, and the practical methods for evaluating injector performance based on combustion quality rather than just flow numbers.

🔬 Exit Geometry – The Conical‑Divergent Principle

The nozzle holes of 0445116011 are not simple straight cylinders. Each hole begins with a standard inlet radius (R0.05 mm) to reduce cavitation, then transitions to a cylindrical section of length 0.8 mm, and finally expands at a 6° angle for the last 0.3 mm before the exit. This expansion reduces the fuel velocity at the very tip, creating a pressure gradient that draws surrounding air into the spray. The droplets formed are smaller (SMD ≈ 14 µm at 1,200 bar) and have a more uniform size distribution, improving the overall air‑fuel mixing rate.

Parameter Value Condition
Number of nozzle holes 5 asymmetrical pattern
Hole diameter (cylindrical section) 0.133 mm ± 0.002 mm
Exit expansion angle 6° conical‑divergent
Cylindrical length 0.8 mm before expansion
Sauter Mean Diameter (SMD) 14 µm @ 1,200 bar
Static flow @ 1,000 bar 400 cc/30s ± 2.0 %
Solenoid resistance 0.32 Ω @ 20°C
Recommended rail pressure 250 – 1,600 bar continuous operation

The 6° expansion angle is critical: a smaller angle (3°) does not create sufficient radial velocity to enhance entrainment, while a larger angle (9°) reduces the exit velocity too much, shortening the spray penetration and reducing the fuel's reach into the combustion bowl.

🔗 Application Coverage – Engine Families Using This Nozzle

0445116011 is specified for Euro 4 and Euro 5 engines where particulate emissions were a design priority:

Ford / PSA – DW10A, DW10B (2.0 HDi 90‑110 kW) – Focus Mk2, Mondeo Mk4, Peugeot 307/407, Citroën C4/C5 (Euro 4/5 variants)

Volvo – D5 (D5244T2, D5244T4, D5244T5) – S60, V70, XC70, XC90 (model years 2004‑2010)

Mazda – MZR‑CD 2.0 (RF7J) – Mazda6, Mazda3 diesel variants

Mini – Cooper D (1.6, N47) – early diesel Mini models

BMW – 2.0d (N47D20) – early N47 diesel variants

This injector is not interchangeable with 0445116010, which has a straight‑bore nozzle without the conical expansion. The difference in spray characteristics would alter the combustion pattern and increase soot emissions by 15‑20%.

🧭 Air Entrainment – The Key to Soot Reduction

The improved air entrainment of 0445116011 has a direct effect on soot formation. In a standard straight‑bore nozzle, the fuel jet core remains relatively dense for the first 30‑40 mm of penetration, creating fuel‑rich zones where soot particles form. The conical‑divergent exit, by inducing radial velocity components, promotes mixing at the jet periphery from the very moment of exit. This reduces the peak soot concentration by approximately 20% under full‑load conditions, a benefit that helps maintain DPF (diesel particulate filter) regeneration intervals.

The improved mixing also reduces the combustion temperature gradient in the cylinder-hot spots are minimised, lowering NOx formation by approximately 5‑8% without EGR adjustments. This makes the 0445116011 a valuable component for engines that must meet both particulate and NOx emission limits.

🧪 Diagnostic Approach – Evaluating Atomisation Quality

While flow testing measures the total quantity, evaluating the atomisation quality requires different methods:

Combustion noise analysis : Use a knock sensor or cylinder pressure transducer to measure the rate of pressure rise. A well‑atomised spray produces a more gradual pressure rise, resulting in a "softer" combustion sound. An injector with degraded atomisation will have a sharper, more metallic knock, especially at idle.

Exhaust opacity under load : Perform a snap acceleration from 1,500 to 3,000 rpm while measuring the exhaust smoke opacity. A healthy 0445116011 should show opacity below 15% on a standard opacity meter. If the opacity exceeds 25%, the atomisation quality has degraded, likely due to nozzle exit erosion or partial blockage.

Fuel dilution in engine oil : Poor atomisation leads to fuel impingement on the cylinder wall, which washes past the piston rings and dilutes the engine oil. A fuel‑dilution level above 3% in the oil indicates that the injectors are not atomising correctly-an indirect indicator that the nozzle exit geometry may be compromised.

❓ FAQ – Practical Questions on Spray Characteristics and Nozzle Wear

Q1: How can I tell if the conical‑divergent exit has been eroded or damaged?
A direct visual inspection requires removing the nozzle and examining it under magnification. Indirectly, an increase in exhaust smoke opacity (above 20% under load) or a sudden drop in fuel economy (by more than 5%) suggests that the nozzle exit geometry has been compromised.

Q2: Can I clean the nozzle holes to restore the atomisation quality?
Cleaning removes varnish and soft deposits, which can improve atomisation if the only issue was blockage. However, if the conical‑divergent exit has been eroded or the expansion angle has changed, cleaning will not restore the spray quality. The only effective solution is nozzle replacement.

Q3: What causes the conical‑divergent exit to erode?
Erosion is primarily caused by cavitation and fuel‑borne particles. The expansion region is particularly susceptible to cavitation because the pressure drops as the fuel expands. Using a high‑quality fuel filter and maintaining the filtration system are the best preventative measures.

Q4: Does the 6° expansion angle affect the flow measurement?
Yes. The expansion reduces the effective flow resistance, increasing the static flow by approximately 2‑3% compared to a straight bore of the same inlet diameter. This is accounted for in the injector's calibration-the ECU's base maps are designed for the specific flow characteristics of this nozzle.

Q5: Can I use this injector on an engine with a different piston bowl design?
The spray penetration and cone angle are matched to the bowl geometry of the engines listed in the application section. Using this injector on an engine with a different bowl shape may cause wall impingement (if the bowl is smaller) or poor mixing (if the bowl is larger). We recommend checking the original part number for compatibility.

Q6: What is the expected service life of the nozzle before the atomisation quality degrades?
Under normal EN590 fuel and regular filter changes, the conical‑divergent exit can maintain its geometry for 180,000‑200,000 km. However, the atomisation quality can degrade earlier if the fuel contains water or abrasive particles-these accelerate erosion and can reduce the service life to 120,000 km.

202510091606539026

 

 

2

3

4

 

Flexible Payment Methods for Your Convenience

 

To make your purchasing experience smooth and easy, we offer a variety of secure payment options:

product-750-750

Bank Transfer

Pay directly in 15 supported currencies.

west union

Western Union

Quick and global money transfers.

PayPalLogo2014-1024x1014

PayPal

Safe and convenient online payment.

ae99cd49-2667-464e-b9db-b39cee0126e1

Alibaba

Enjoy extra protection with trusted Alibaba transactions.

We're here to make your order process worry-free - choose the payment method that works best for you!

 

Shipping Made Simple

6

Customer reviews

 

8

Hot Tags: 0445116011 Injector – Nozzle Exit Geometry & Jet‑Induced Swirl for Enhanced Air Entrainment and Reduced Soot, China 0445116011 Injector – Nozzle Exit Geometry & Jet‑Induced Swirl for Enhanced Air Entrainment and Reduced Soot manufacturers, suppliers, factory, bosch injector

You Might Also Like

(0/10)

clearall