B12 Engine - Small Displacement Gasoline Power
The B12 engine is a classic small displacement gasoline engine independently developed by SAIC-GM-Wuling.
This reliable powerplant is widely used in popular micro-cars including Wuling Zhiguang, Wuling Rongguang,
and Wuling Hongguang models.
Technical Specifications
| Specification |
Details |
| Engine Model |
B12 (Derivative models: LAQ, L2Y, etc.) |
| Configuration |
Inline 4-cylinder, DOHC (Double Overhead Camshaft), 16-valve |
| Displacement |
1.206 L |
| Bore * Stroke |
69.7 mm * 79 mm |
| Compression Ratio |
9.8:1 |
| Rated Power |
63 kW / 6000 rpm (Approximately 86 horsepower) |
| Maximum Torque |
103–108 N·m / 4000 rpm |
| Specific Power Output |
52.2 kW/L |
| Firing Order |
1-3-4-2 |
| Cooling System |
Water-cooled |
| Air Intake |
Naturally aspirated |
| Fuel System |
Multi-point fuel injection (MPI) |
| Idle Speed |
750 ± 50 rpm |
| Dimensions (L*W*H) |
Approximately 565 * 520 * 610 mm |
Performance Note: The B12 engine delivers an impressive specific power output of 52.2 kW/L,
significantly exceeding the domestic industry standard of 50 kW/L prevalent during its development period.