Liwei M0019P140 Diesel Injector Nozzle: Penetration-Velocity vs Swirl-Period Phase Window, Low-Swirl Over-Penetration Reversal & In-Orifice Flow Separation in High-Swirl Common-Rail Engines
1. Product:M0019P140
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
The Liwei M0019P140 is a seven-hole, 140° diesel injector nozzle referenced for high-swirl, deep-bowl common-rail engines. It is a bare nozzle, not a complete injector. Its 140° cone is the narrowest in the Liwei range, with spray penetration around 52 mm at 1,600 bar. A narrow cone resists swirl deflection and delivers fuel deep into the bowl. But penetration is not only a distance. It is a velocity and timing relationship. The plume must reach the outer bowl radius during the window when swirl velocity and air density are still high. If it arrives too fast, it can hit the bowl wall. If it arrives too slowly, swirl carries it off target. At low swirl and cold start, the same nozzle can over-penetrate because the opposing air motion is weaker. The ECM controls injection timing but cannot see plume arrival or over-penetration. This guide focuses on penetration-velocity versus swirl-period phase matching, low-swirl over-penetration reversal, in-orifice flow separation and installation verification.
📌 Fitment & Nozzle Identification
The M0019P140 must be matched to the correct injector body, needle, control valve, seat angle, opening pressure and needle lift. It is commonly referenced for Bosch CRI and Denso G2/G3 injector families with a 7 × 0.185 mm geometry. Confirm injector part number, nozzle number, needle diameter, seat angle, lapping requirement and copper washer specification before ordering. Do not install a bare nozzle without checking injector body wear and sleeve condition. Also confirm the combustion system. A 140° cone is intended for high-swirl, deep-bowl pistons. A mismatched bowl changes spray targeting and can increase wall impingement, soot and oil dilution.
📊 Penetration, Velocity & Swirl Data
| Parameter | Service target | Diagnostic meaning |
|---|---|---|
| Nozzle type | Inward-opening, differential pressure | Common-rail nozzle family |
| Number of holes | 7 | Flow area and plume count |
| Orifice diameter | ≈ 0.185 mm | Atomization and axial velocity |
| Spray angle | 140° | Extreme narrow-angle, high-swirl matching |
| Static flow @ 100 bar | ≈ 820 cc/min | Hydraulic baseline |
| Spray penetration @ 1,600 bar | ≈ 52 mm | Bowl reach and wall impingement risk |
| Opening pressure | ≈ 220 ± 10 bar | Start of injection |
| Needle guide diameter | ≈ 4.1 mm | Concentricity and friction |
| Needle-to-nozzle clearance | ≈ 4–6 µm | Leakage and seizure risk |
| Seat angle | ≈ 60° conical | Sealing and after-dribble control |
| Seat diameter | ≈ 3.7 mm | Seat contact and flow transition |
| Needle lift | ≈ 0.21 mm | Partial-lift and pilot stability |
| Material | M42 high-speed steel | Hot hardness and wear resistance |
| DLC coating | ≈ 1.5 µm on guide | Friction and soot resistance |
| Max rail pressure | ≈ 1,800 bar | Pressure compatibility |
⚙️ Penetration Velocity vs Swirl Period
High-swirl combustion systems create a rotating air field. The time required for one swirl rotation is the swirl period. The fuel plume needs a certain time to travel from the nozzle tip to the outer bowl radius. If plume travel time and swirl period are mismatched, mixing suffers. A 140° cone keeps the plume on a narrow axial path, so it loses less momentum to radial dispersion than a 150° or 154° cone. That helps it reach the outer bowl radius in a high-swirl field. But if the plume travels too fast, it reaches the wall before the surrounding air has mixed with it. If it travels too slowly, swirl carries it downstream before it reaches the target zone. The ECM cannot measure this. It only sees cylinder balance, fuel trim and exhaust temperature. This is why spray angle and penetration should be matched to swirl ratio, not only to bowl depth.