Shandong Shengyue Technology Development Co.,Ltd is one of the most professional yunnei power inline four-cylinder diesel engine assembly 4100/4102 manufacturers and suppliers in China. Please feel free to buy high quality genuine auto parts at competitive price from our factory.
YUNNEI POWER Inline four-cylinder diesel ENGINE ASSEMBLY 4100/4102
Basic Physical Specifications & Engine Structure
| Parameter Category | Yunnei 4100 Series (e.g., YN4100QBZL) | Yunnei 4102 Series (e.g., YN4102QBZL / YN38) |
|---|---|---|
| Engine Type | Inline, water-cooled, 4-stroke, diesel engine | Inline, water-cooled, 4-stroke, diesel engine |
| Number of Cylinders | 4 Cylinders | 4 Cylinders |
| Number of Valves | 8 Valves (2 Valves per Cylinder) | 8 Valves (2 Valves per Cylinder) |
| Cylinder Bore | 100 mm (Core Difference) | 102 mm (Core Difference) |
| Piston Stroke | 105 mm | 115 mm (110 mm for certain high-speed variants) |
| Total Displacement | 3.298 L | 3.760 L - 3.853 L |
| Engine Dry Weight | Approx. 320 kg | Approx. 355 kg - 370 kg |
| Engine Oil Capacity | 7.5 L - 8.5 L | 9.0 L - 10 L |
Power Output & Thermodynamic Performance Parameters
| Parameter Category | Yunnei 4100 Series (e.g., YN4100QBZL) | Yunnei 4102 Series (e.g., YN4102QBZL / YN38) |
|---|---|---|
| Rated Power Range | 66 kW - 81 kW | 85 kW - 105 kW |
| Horsepower Coverage | 90 hp - 110 hp | 115 hp - 143 hp |
| Rated Speed | 3000 rpm - 3200 rpm | 2600 rpm - 3000 rpm |
| Maximum Torque | 280 N·m - 310 N·m | 360 N·m - 420 N·m (Stronger heavy-duty climbing) |
| Max Torque Speed | 1800 - 2200 rpm | 1600 - 2000 rpm (Earlier low-speed torque release) |
| Min. Fuel Consumption Rate | ≤ 210 g/kW·h | ≤ 205 g/kW·h (Lower for common rail models) |
| Aspiration Mode | Turbocharged Intercooled (TI) | Turbocharged Intercooled (Single Turbo for engineering version) |
Core Assembly Tolerances & Machining Dimensions
| Parameter Category | Yunnei 4100 Series (100mm Bore) | Yunnei 4102 Series (102mm Bore) |
|---|---|---|
| Piston Skirt OD (Standard) | 99.88 mm - 99.90 mm | 101.86 mm - 101.89 mm |
| Main Journal Diameter | 75 mm (Standard Size) | 80 mm (Standard Size, more robust & anti-torsion) |
| Crankpin Diameter (Rod Journal) | 60 mm | 62 mm or 65 mm (Depending on Cargo/Tipper version) |
| Piston Pin Diameter | 32 mm | 34 mm or 36 mm (Heavy-duty reinforced) |
| Intake Valve Clearance (Cold) | 0.25 mm - 0.30 mm | 0.25 mm - 0.30 mm |
| Exhaust Valve Clearance (Cold) | 0.30 mm - 0.35 mm | 0.30 mm - 0.35 mm |
| Compression Ratio | 17.5 : 1 | 17.0 : 1 |
Wear Parts, Electrical, & Filtration System Parameters
| Parameter Category | Yunnei 4100 Series Common Config | Yunnei 4102 Series Common Config (e.g., HOWO Truck) |
|---|---|---|
| Starter Motor Spec | 24V / 4.5 kW (11 Teeth) | 24V / 5.5 kW or 6.0 kW (11 or 12 Teeth) |
| Alternator Spec | 28V / 55A or 70A | 28V / 70A or 90A (Matching heavy-duty dual batteries) |
| Alternator/Water Pump Belt | AV13 or AV17 Cogged V-Belt | AV22 Heavy-Duty Cogged V-Belt (e.g., AV22X1200Li) |
| Oil Filter Spec (Qty) | Spin-on Single Filter (J0810 Series) | Spin-on Single or Dual Filters (J1012 Series) |
| Fuel Filter Spec | Spin-on Dual-Stage Filter (CX0708) | Common Rail Fuel Filter with Pre-heater + Fuel Water Separor |
| Air Cleaner Recommended Flow | 400 - 500 m³/h | 600 - 800 m³/h (Matching large-intake air cleaners) |
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