 | This article relies largely or entirely on a single source. (August 2022) |
| General Motors L3B engine | |
|---|---|
| Overview | |
| Manufacturer | General Motors |
| Production | 2018–present |
| Layout | |
| Configuration | Inline-4 |
| Displacement | 2.7 L; 166.4 cu in (2,727 cc) |
| Cylinder bore | 92.25 mm (3.63 in) |
| Piston stroke | 102 mm (4.02 in) |
| Cylinder block material | 380 T5 Cast Aluminum |
| Cylinder head material | 356 T5 Cast Aluminum |
| Valvetrain | DOHC 4 valves/cyl with VVT and VVL |
| Compression ratio | 10.0:1 |
| RPM range | |
| Max. engine speed | 6100 RPM |
| Combustion | |
| Turbocharger | Single BorgWarner Dual-Volute w/ electrically actuated wastegate |
| Fuel system | Gasoline direct injection |
| Fuel type | Gasoline |
| Oil system | Wet sump |
| Cooling system | Water cooled |
| Output | |
| Power output | 237–325 hp (177–242 kW) |
| Torque output | 259–430 lb⋅ft (351–583 N⋅m) |
| Emissions | |
| Emissions target standard | Tier III, Bin 50 |
| Emissions control systems | Three-way catalytic converter, wide-band heated oxygen sensor |
The GM L3B engine is a turbocharged four-cylinder gasoline engine designed by General Motors. It is an undersquare aluminum DOHC inline-four displacing 2.7 liters (165 cid) and tuned for strong low-end torque.
In addition to GM's active fuel management, start-stop system, and variable valve timing, which are already featured on GM's other full-size pickup truck engines, this engine also features GM's Intake Valve Lift Control which has 3 different intake cam profiles that are electromagnetically actuated to provide improved fuel economy and performance at a wider range of operating conditions.[1]
The BorgWarner developed turbo can produce up to 27 psi (1.9 bar) of boost thanks in part to its unique dual volute turbine housing and an electrically actuated wastegate. Instead of two side-by-side exhaust passages like on a regular twin-scroll turbocharger, in this design the two exhaust passages are concentric and allow for better use of the exhaust pulse energy.[1]
- ^ a b Sherman, Don. "All-new four-cylinder for 2019 Chevrolet Silverado". www.sae.org. SAE.org. Retrieved 28 May 2018.