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Control method and device of composite pressurization system

A supercharging system and control method technology, applied in the direction of engine components, machines/engines, internal combustion piston engines, etc., can solve problems affecting diesel engine performance, diesel engine torque output instability, etc.

Active Publication Date: 2021-05-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the operating parameters of the diesel engine are constantly changing during operation, and the electric supercharger needs to be cut in and out frequently, resulting in unstable torque output of the diesel engine, which seriously affects the performance of the diesel engine

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  • Control method and device of composite pressurization system
  • Control method and device of composite pressurization system
  • Control method and device of composite pressurization system

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Embodiment Construction

[0066] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0067] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0068] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

[0069] In all examples shown and discussed herein, any specific values ​​should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have dif...

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Abstract

The invention discloses a control method and device of a composite pressurization system, and relates to the technical field of power systems. The control method and device are applied to controller algorithm design in the composite pressurization system. The method comprises the steps that the target air-fuel ratio of an engine is determined according to current operation parameters of the engine; the current air inlet pressure of the engine is obtained, and the target air inlet pressure of the engine is determined according to the target air-fuel ratio of the engine; the difference value between the target air inlet pressure and the current air inlet pressure of the engine is determined; a first threshold value and a second threshold value are determined according to the difference value between the target air inlet pressure and the current air inlet pressure; and according to the first threshold value, the second threshold value and the difference value, a control signal is output to a bypass valve and an electric supercharger, so that the current air inlet pressure of the engine reaches the target air inlet pressure. According to the control method and device of the composite pressurization system, the dynamic response of composite pressurization is improved, and the problem of engine torque fluctuation caused by engine intake pressure fluctuation when an electric pressurizer is suddenly cut in and cut out can be eliminated, so that the performance of the engine is effectively improved.

Description

technical field [0001] The present invention relates to the technical field of power systems, and more specifically, to a control method and device for a compound supercharging system. Background technique [0002] In order to increase the power of the diesel engine, the turbocharger is often used to increase the intake air volume during the design and manufacture of the diesel engine. However, the exhaust energy of the turbocharger is small when the diesel engine is running at low speed and low load, and there is a lag in the turbine, which leads to a delay in the torque response of the diesel engine at low speed (turbo lag). [0003] At present, in related technologies, an electric supercharger is added behind the main turbocharger as an auxiliary supercharger, and the fast response of the electric supercharger is used to solve the problem of insufficient torque and slow response of the diesel engine at low speed. However, the operating parameters of the diesel engine are...

Claims

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Application Information

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IPC IPC(8): F02B37/10F02B37/18F02B39/10
CPCF02B37/10F02B37/183F02B39/10Y02T10/12
Inventor 崔涛杨攀涛赵彦凯
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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