Parameter | Value |
|---|---|
Displacement | 1.85 L (1,850 cc) |
Cylinder Arrangement | Inline 4-cylinder |
Bore × Stroke | 80 mm × 92 mm |
Compression Ratio | 15.8:1 |
Valve Train | DOHC, 16 valves |
Fuel System | Direct Injection |
Induction | Turbocharged with Intercooler |
Maximum Power | 106.5–110 kW @ 4,000 rpm |
Maximum Torque | 350 Nm @ 1,800–2,600 rpm |
Idle Speed | 800 ± 50 rpm |
Emission Standard | Euro 5 / China 5 |
Engine Weight | ≤185 kg |
Data compiled from
The engine employs a robust inline four-cylinder configuration with a bore diameter of 80 mm and a stroke length of 92 mm, resulting in a square design that balances power delivery and durability . The cylinder block is constructed from cast iron, providing structural rigidity necessary for high compression ratios and turbocharged operation . The cylinder block features precision-machined cylinder bores with a standard diameter of 80.00–80.01 mm, with wear limits extending to 0.01 mm . The main bearing housing diameters range from 64.000 mm to 64.019 mm, categorized into three distinct grades to ensure optimal bearing clearance .
The pistons are manufactured from aluminum alloy with a graphite coating on the skirt surface, designed to minimize friction and enhance thermal management . The piston diameter measures 79.921–79.939 mm when measured 20 mm from the skirt bottom, establishing a piston-to-cylinder clearance of 0.061–0.089 mm under standard conditions . Each piston is fitted with three piston rings: a top compression ring, a second compression ring, and an oil control ring. The ring gaps are precisely controlled, with the top ring gap ranging from 0.23 to 0.33 mm and the second ring gap from 0.40 to 0.60 mm .
The connecting rods are manufactured in six weight classifications ranging from 807–812 g (Class A) to 832–837 g (Class F), ensuring balanced assembly . The center distance between the big end and small end is maintained at 144 ± 0.03 mm, with a side clearance of 0.35–0.63 mm between the connecting rod and crankshaft counterweights .
The crankshaft incorporates main bearing journals categorized into three grades (A, B, C) with diameters ranging from 59.981 mm to 60.000 mm . Similarly, connecting rod journals are divided into two grades (1 and 2) with diameters of 49.984–50.000 mm . The crankshaft axial clearance is maintained between 0.19 and 0.37 mm under standard conditions, with a maximum allowable limit of 0.4 mm .
The main bearings utilize a color-coded system for thickness identification: red bearings measure 1.980–1.987 mm, yellow bearings measure 1.987–1.994 mm, and blue bearings measure 1.994–2.001 mm . This precision grading enables the achievement of main bearing oil clearances between 0.022 and 0.052 mm.
The cylinder head is constructed from aluminum alloy and features a double overhead camshaft (DOHC) configuration with 16 valves . The camshafts operate on hydraulic lash adjusters with roller rocker arms, reducing friction and ensuring quiet operation. The camshaft journals measure 23.947–23.960 mm in diameter, running in bearing bores of 24.000–24.021 mm, providing an oil clearance of 0.04–0.074 mm .
Valve timing is precisely controlled, with intake valves opening at 24.8° before top dead center (BTDC) and closing at 41.2° after bottom dead center (ABDC), achieving a maximum lift of 8 mm . Exhaust valves open at 39.3° before bottom dead center (BBDC) and close at 30.7° after top dead center (ATDC), also with 8 mm of lift .
The 19D4N engine delivers maximum power of 106.5–110 kW at 4,000 rpm, with peak torque of 350 Nm available across a broad plateau from 1,800 to 2,600 rpm . This torque characteristic enables strong low-end response and sustained pulling power, making the engine well-suited for commercial vehicle applications. The engine achieves its maximum net power of 106.5 kW at 4,000 rpm, with torque maintained consistently throughout the mid-range operating band .
In practical applications, the 19D4N demonstrates favorable fuel consumption figures. In the LDV G10 van configuration, combined cycle fuel consumption is rated at 8.6 L/100 km, with highway consumption of 7.2 L/100 km and urban consumption of 10.9 L/100 km . This translates to a theoretical range exceeding 1,000 km under optimal highway conditions from the 75-liter fuel tank.
The engine complies with Euro 5 emission standards, featuring electronic sequential fuel injection and exhaust gas recirculation systems . Carbon dioxide emissions are rated at 227 g/km on the combined cycle, with urban CO₂ emissions of 289 g/km
