Variable nozzle turbocharger control method and device
A technology of turbocharger and control method, which is applied in the directions of gas turbine devices, machines/engines, combustion engines, etc., and can solve problems such as small nozzle ring blade opening, VNT life reduction, nozzle ring blade rotation angle deviation, etc., to avoid Carbon deposits, prolonging life and avoiding lack of power
Active Publication Date: 2018-11-02
SAIC MOTOR
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Problems solved by technology
[0005] However, when the VNT is running at high speed and high load for a long time, carbon deposits are easily formed on the nozzle ring blades, resulting in deviations in the rotation angle of the nozzle ring blades, and even the nozzle ring blades are stuck, resulting in a reduction in the life of the VNT
[0006] At the same time, when the engine stops unexpectedly, the supercharger electronic control unit (REA) may suddenly lose power, and at this time, the opening of the nozzle ring blades remains at the moment of power failure, and there are cases where the opening of the nozzle ring blades is small
When starting the engine again, the turbocharger is underpowered due to the small opening of the nozzle ring vanes
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[0031] When the VNT is running at high speed and high load for a long time, carbon deposits are easily formed on the nozzle ring blades, resulting in a deviation in the rotation angle of the nozzle ring blades, and even the nozzle ring blades are stuck, resulting in a reduction in the life of the VNT.
[0032] In the embodiment of the present invention, after the engine stops rotating, the nozzle ring vanes are controlled to move back and forth between the first opening position and the second opening position. Since the nozzle ring vanes are in contact with the nozzle hub, the back and forth movement of the nozzle ring vanes The movement can smear the attachments on the nozzle ring blades to the nozzle hub, so that the attachments on the nozzle ring blades can be removed, thus effectively avoiding the formation of carbon deposits on the nozzle ring blades and improving the life of the VNT.
[0033] In order to make the above objects, features and advantages of the embodiments ...
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A variable nozzle turbocharger control method and device is provided. The method comprises: when detecting an engine stopping rotating, controlling a nozzle ring blade of a turbocharger to reciprocate between a first opening position and a second opening position until the number of repeated movements reaches a preset one, the second opening position being larger than the first opening position. By using the method and device, carbon deposition can be effectively prevented from forming on the nozzle ring blade, thus prolonging the life of the variable nozzle turbocharger.
Description
technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a control method and device for a variable nozzle turbocharger. Background technique [0002] Supercharging technology increases the air density in the cylinder and increases the intake air volume by increasing the intake pressure of the engine, which can correspondingly increase the circulating oil supply and greatly improve the power of the engine. [0003] There is a defect in the ordinary turbocharging system, that is, the engine cannot produce the expected high boost pressure at low speed, resulting in insufficient low-speed torque, poor starting acceleration performance, and slow transient response. [0004] The appearance of the variable nozzle turbocharger (Variable Nozzle Turbocharger, VNT) can effectively solve the above problems, through electronic control to change the opening of the turbine nozzle ring vane, to change the speed and boost pressure ...
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IPC IPC(8): F01D17/16F02B37/24F02C6/12
CPCY02T10/12
Inventor 杨芾曾斌朱国华胡建月张咏江王凯
Owner SAIC MOTOR