Английская Википедия:GM L3B engine
Шаблон:One source Шаблон:Infobox engine
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 the best fuel economy and performance at a wider range of operating conditions.[1]
The BorgWarner developed turbo can produce up to Шаблон:Convert 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]
History
The L3B was first used in the Chevrolet Silverado and GMC Sierra, with an output of Шаблон:Convert at 5600 RPM and Шаблон:Convert at 1500 RPM. With the unveiling of the 2022 model year Silverado, GM announced a significant revision that stiffened and strengthened the engine allowing for a GM-estimated increased maximum torque rating of Шаблон:Convert while also improving noise, vibration, and harshness (NVH).[1] Parts are cast at Bedford Casting Operations in Indiana.[2] Assembly is at Spring Hill Manufacturing, Tennessee, USA.[3] The L3B is the successor to the 3.6L V6 LGX, 3.6L V6 LGZ, and 4.3L V6 LV3 engines.[3]
Specifications
The engine is the first GM truck engine to feature an active thermal management system. This system consists of an electrically driven water pump and a 3-way rotary valve which allows the engine to maintain proper operating temperatures and quicker warm-ups. Also, a continuously variable oil pump helps to lower parasitic losses as well as providing proper lubrication and cooling to the engine, especially under high-load conditions.[1] The Active Fuel Management system can shutdown the middle two cylinders under low-power conditions.[2]
Cylinder liners are spun nodular iron.[2]
The low-output work truck variant runs 10 psi of boost, the 390 lb⋅ft variant runs 20 psi, and the 430 lb⋅ft variant runs 27 psi.[2]
Applications
| Year(s) | Model | Power | Torque | Notes |
|---|---|---|---|---|
| 2019–2021 | Chevrolet Silverado and GMC Sierra 1500 | Шаблон:Convert @ 5600 RPM | Шаблон:Convert @ 1500 RPM | |
| 2022–present | Шаблон:Convert @ 5600 RPM | Шаблон:Convert @ 3000 RPM | TurboMax name | |
| 2020–present | Cadillac CT4 | Шаблон:Convert @ 5500 RPM | Шаблон:Convert @ 1500 RPM | |
| 2020–present | Cadillac CT4-V | Шаблон:Convert @ 5500 RPM | Шаблон:Convert @ 2000 RPM | |
| 2023 | Chevrolet Colorado | Шаблон:Convert @ 5600 RPM | Шаблон:Convert @ 3000 RPM | detuned with different components, RPO code L2R |
| 2023 | Шаблон:Convert @ 5600 RPM | Шаблон:Convert @ 2000 RPM | ||
| 2023 | Chevrolet Colorado and GMC Canyon | Шаблон:Convert @ 5600 RPM | Шаблон:Convert @ 3000 RPM |
LK0
| Year(s) | Model | Power | Torque | Dyno Chart |
|---|---|---|---|---|
| 2024– | Chevrolet Traverse | Шаблон:Cvt @ rpm | Шаблон:Cvt @ rpm | |
| GMC Acadia |
References
Шаблон:GM late engine timeline
- ↑ 1,0 1,1 1,2 1,3 Шаблон:Cite web
- ↑ 2,0 2,1 2,2 2,3 Interview with Kevin Luchansky, GM Assistant Chief Engineer, https://www.youtube.com/watch?v=fU-bhEjflwo, Aug 18, 2023
- ↑ 3,0 3,1 Шаблон:Cite web
