Bosch 0445110423 CRI 2.0 Injector – The Energy-Efficient Calibration for Fiat 1.3 Multijet & Opel 1.7 CDTi Diesel Engines
1. Product:0445110423
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
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Product Introduction
In common rail systems, rail pressure and static flow are the headline figures, but the true measure of an injector's contribution to overall engine efficiency is its ability to convert electrical energy into hydraulic work with minimal losses. The Bosch 0445110423 is a CRI 2.0-generation solenoid injector calibrated for a maximum rail pressure of 1,600 bar (23,200 psi), with a static flow of 720 cc/min at 100 bar – a relatively modest flow rate that reflects its application in small-displacement diesel engines (1.3L to 1.7L). However, its defining metric is the pilot injection accuracy – the injector consistently delivers pilot quantities between 1.5 and 2.5 mm³/stroke with a variation of less than ±0.15 mm³, enabling the homogeneous charge compression required for low combustion noise and reduced NOx formation. This precision is achieved through a combination of a fast-acting solenoid (pull-in time: 240 µs) and a lightweight armature (mass: 3.2 g), which together minimise the mechanical inertia that can cause pilot quantity drift in heavier armature designs. In small-displacement engines where each injection event accounts for a larger percentage of the total fuel delivery, this precision translates directly to fuel economy improvements – making the 0445110423 the preferred service choice for the Fiat 1.3 Multijet and Opel 1.7 CDTi platforms.
█ Application Coverage – Small Diesel Platforms with High Efficiency Demands
The 0445110423 is a widely deployed service replacement across several vehicle platforms from the Euro 4 and Euro 5 emissions era:
Fiat – 1.3L Multijet (engine codes 188A2, 188A3, 199A2, 199A3) in Punto, Grande Punto, Idea, Panda, Qubo, Doblo, 500
Opel/Vauxhall – 1.7L CDTi (engine codes Z17DTL, Z17DTH, Z17DTJ) in Corsa D, Meriva A, Astra H, Combo
Suzuki – 1.3L DDiS (engine code Z13DT) in Swift, SX4
Ford – 1.4L/1.6L Duratorq TDCi in some applications (Fiesta, Fusion)
Citroën/Peugeot – 1.4L/1.6L HDi in some applications (C3, 207, Berlingo)
The injector's 7-hole nozzle with 0.170 mm diameter orifices and 148° spray angle produces a droplet SMD of approximately 19 µm – the finest atomisation in the CRI 2.0 family, delivering the small droplet sizes essential for the compact combustion chambers of small-displacement diesel engines. It directly replaces Bosch part numbers 0445110424, 0445110425, and 0445110426, as well as Fiat OEM number 55188324 and GM number 55188325.
▐ Technical Specifications – Electrical and Hydraulic Parameters
| Parameter | Specification |
|---|---|
| Maximum Rail Pressure | 1,600 bar (23,200 psi) |
| Actuator Type | Solenoid CRI 2.0 |
| Coil Resistance (20°C) | 0.90 – 1.05 Ω |
| Peak Pull-in Current | 16 A |
| Holding Current (PWM) | 5.0 – 5.5 A |
| Static Flow @ 100 bar | 720 ± 20 cc/min |
| Nozzle Holes / Diameter | 7 × 0.170 mm |
| Spray Angle | 148° |
| Needle Lift | 0.19 mm |
| Hydraulic Opening Pressure | 200 bar |
| Leak-off Rate (new, idle) | ≤ 14 ml/min |
| Max. Engine Speed | 5,200 rpm |
| Solenoid Inductance | 2.4 mH |
The 2.4 mH inductance results in a pull-in time of approximately 240 µs, which is adequate for the 5,200 rpm governed speed of the 1.3L Multijet. The higher inductance (compared to the 0445110524's 2.2 mH) reduces the peak current requirement, lowering the electrical load on the ECU's injector drivers – a detail that extends the life of the engine control unit, particularly in high-mileage applications.
◆ Construction Details – The Pilot-Optimised Design
The CRI 2.0 architecture used in the 0445110423 incorporates several refinements specifically tuned for small-displacement, high-efficiency diesel engines:
→ Lightweight Armature (3.2 g): The solenoid armature is machined from a low-density ferromagnetic alloy (containing 5% aluminium), reducing its mass by 15% compared to standard armatures. This lower mass allows the injector to switch faster and more precisely, enabling the short pilot injection durations required for the 1.3L Multijet's high-speed combustion cycle.
→ Non-Serviceable Laser-Welded Nozzle: The nozzle is laser-welded to the injector body, eliminating the high-pressure sealing joint that can leak in earlier CRI designs. This sealed-unit construction is non-serviceable – if the nozzle wears, the entire injector must be replaced. While this increases replacement cost, it reduces the risk of high-pressure fuel leaks, a critical safety consideration in small-displacement engines where the fuel rail is mounted near the intake manifold.
→ DLC-Coated Needle Guide: The nozzle needle receives a 1.0 µm diamond-like carbon coating, providing a hardness of 2,000 HV. The thin coating is sufficient for the lower operating pressures (1,600 bar) and the lower soot loads of small-displacement engines equipped with EGR and DPF systems. The coating's primary function is to reduce friction during the pilot injection phase, where the needle travels only 0.05 mm, ensuring a consistent pilot quantity.