A turbocharging system, control method, storage medium and automobile

Abstract

The invention discloses a turbocharging system, a control method, a storage medium and an automobile, which are applied to a vehicle engine and include a controller, a turbocharger, and an auxiliary device. The auxiliary device includes an auxiliary air intake device and an auxiliary exhaust device; The intake device includes an intake bypass pipe and at least two pressure vessels; the auxiliary exhaust device includes a waste gas bypass pipe; one end of the intake bypass pipe is connected with the compressor inlet main pipe of the turbocharger, and the intake bypass pipe The other end of the pipe is connected with the intake main pipe of the vehicle engine; the openings of each pressure vessel are connected with the air intake main pipe of the vehicle engine; one end of the wastegate pipe is connected with the turbine intake pipe of the turbocharger, and the wastegate pipe The other end is connected to the exhaust pipe after the turbocharger, and the controller is configured with a specific control strategy. The turbocharger system, control method, storage medium and automobile disclosed by the invention can effectively improve the matching problem between the engine and the turbocharger under various working conditions.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a turbocharging system, a control method, a storage medium and an automobile. Background technique [0002] The core principle of the turbocharger is to use the inertial momentum of the exhaust gas discharged from the engine to drive the turbine in the turbine chamber. The high-speed rotation of the turbine drives the coaxial impeller. The impeller presses the air sent by the air filter pipe to make it supercharged. into the cylinders of the engine. Nowadays, turbocharging technology has gradually become an important direction of engine technology development by virtue of its advantages of reducing engine size, increasing engine power and reducing harmful emissions. [0003] The flow characteristics of engines using turbocharged technology are different from those of naturally aspirated engines. The intake matching problems are mainly reflected in low intake efficiency at low en...

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Problems solved by technology

[0009] In the prior art, those skilled in the art focus on the improvement of the turbocharger, mainly focusing on the scheme of adopting the variable cross-section turbocharging technology, and the electric auxiliary turbine scheme of using the electric motor to regulate the speed of the turbocharger drive shaft , for these two schemes, the working position of the variable cross-section turbocharger is in the high-temperature or ultra-high-temperature exhaust gas discharge area, and the working position of the electric auxiliary turbine is in the high-speed turbine transmission shaft. It can be seen that the two schemes The working environment is very harsh, and the application conditions are greatly restricted. For the turbocharging system, there are few technical solutions that can be well matched under all working conditions.

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