Recently, BorgWarner announced that its dual-flow turbocharger has been adopted by BMW and will be adapted to the 3.0L inline six-cylinder gasoline engine. This engine is widely used in BMW passenger cars. After using the new supercharger, it can provide two performance options of 250kW, 500N·m and 280kW, 550N·m.
When it comes to inline six-cylinder engines, people may first think of the 2JZ-GTE equipped on Toyota Supra. In fact, BMW is the real king of inline six-cylinder engines. First, BMW's "straight six" has a history of nearly a hundred years. Second, in recent years, starting with the engine code-named N54, and later the N55 engine, and then the B58 engine, each model represented BMW's advancement in the field of turbocharging technology at that time. The latest research and development results.
Nowadays, when the Mercedes-Benz E-Class uses 1.5T, it is very rare for a car company like BMW to insist on evolving the 3.0T straight-six turbo engine. Now, with the help of BorgWarner, this classic BMW engine has been sublimated.
『BorgWarner dual-channel turbocharger』
Hysteresis is an inherent physical defect of exhaust gas turbochargers. Therefore, many performance-focused cars will use twin turbochargers. Pressure, mechanical supercharging, electronic supercharging and other methods can be used to make up for this shortcoming, but this will undoubtedly increase the cost.
The "dual-flow turbine technology" provided by BorgWarner to BMW this time can produce similar effects to twin-turbo technology. At the same time, it has many advantages such as smaller size, lighter weight, and lower cost. ."
In terms of working principle, each flow channel of BorgWarner's dual-channel turbocharger can be used by three cylinders at the same time. The exhaust manifold and turbocharger pipeline are arranged separately. Two independent spiral air chambers in the turbocharger guide the pulsating exhaust gas separately, effectively preventing the air flows from interfering with each other. The turbocharger is equipped with two smaller, independent nozzles to improve response.
Finally, compared with a single-flow turbocharger, the dual-flow design can recover energy in the exhaust gas more efficiently, reduce parasitic reverse losses, and improve the response speed of the engine at low speeds.
Written at the end:
At present, small-displacement turbocharged engines have become the mainstream of the market, but regardless of economy, emission limits, etc., having a large-displacement engine Turbine-engined performance cars are still every big boy's dream. When the new Toyota Supra is equipped with BMW's straight-six engine, we should understand that there are not many car companies in this era that can insist on evolving the straight-six engine.
This article comes from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.