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Control method and device for compound supercharging system

A booster system and control method technology, applied in engine control, combustion engine, machine/engine, etc., can solve problems affecting diesel engine performance, diesel engine torque output instability, etc., to improve performance, improve responsiveness, and meet transient conditions The effect of volume demand

Active Publication Date: 2022-06-03
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

Method used

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  • Control method and device for compound supercharging system
  • Control method and device for compound supercharging system
  • Control method and device for compound supercharging system

Examples

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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 arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the invention unless specifically stated otherwise.

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

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

[0069] In all examples shown and discussed herein, any specific values ​​should be construed as illustrative only and not limiting. Accordingly, other instances of the exemplary embodiment may hav...

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Abstract

The invention discloses a control method and device of a compound supercharging system, relates to the technical field of power systems, and is applied to the controller algorithm design in the compound supercharging system, including: determining the target air-fuel ratio of the engine according to the current operating parameters of the engine ; Obtain the current intake pressure of the engine, and determine the target intake pressure of the engine according to the target air-fuel ratio of the engine; determine the difference between the target intake pressure and the current intake pressure of the engine; Determine the first threshold and the second threshold based on the pressure difference; output control signals to the bypass valve and the electric supercharger according to the first threshold, the second threshold and the difference, so that the current intake pressure of the engine reaches the target. air pressure. The application improves the dynamic response of compound supercharging, and can eliminate the engine torque fluctuation problem caused by the engine intake pressure fluctuation when the electric supercharger suddenly cuts in and out, thereby effectively improving the performance of the engine.

Description

technical field [0001] The present invention relates to the technical field of power systems, and more particularly, to a control method and device for a compound supercharging system. Background technique [0002] In order to improve the power of the diesel engine, the turbocharger is often used in the design and manufacture of the diesel engine to increase the intake air volume. However, the exhaust energy of the turbocharger is small when the diesel engine is running at low speed and low load, and the turbo lags, which in turn leads to a delay in the torque response of the diesel engine at low speed (turbo lag). [0003] At present, in the related art, 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 problems of insufficient torque and slow response of the diesel engine at low speed. However, the operating parameters of the diesel engine are constantly chan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D23/00F02B37/10F02B37/18F02B39/10
CPCF02B37/10F02B37/183F02B39/10Y02T10/12
Inventor 崔涛杨攀涛赵彦凯
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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