Control method for diesel engine air inlet flow calculation

A technology of intake air flow and control method, applied in electrical control, engine control, fuel injection control, etc., can solve the problem of inaccurate calculation of intake air flow

Pending Publication Date: 2021-09-10
GUANGXI YUCHAI MASCH CO LTD
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Problems solved by technology

[0008] The purpose of the present invention is to provide a control method for the calculation of intake air flow of a diesel engine, which can effectively solve the calculation of intake air flow caused by the pipeline layout and signal drift caused by the intake air flow sensor or intake model in low speed or low load conditions. Inaccurate problems to ensure stable engine operation

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  • Control method for diesel engine air inlet flow calculation
  • Control method for diesel engine air inlet flow calculation
  • Control method for diesel engine air inlet flow calculation

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Embodiment Construction

[0022] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0023] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0024] Such as Figure 1 to Figure 2 As shown, a control method for calculating the air intake flow rate of a diesel engine according to a preferred embodiment of the present invention mainly includes the following steps: taking the engine speed and the cycle fuel injection quantity as the X-axis and Y-axis of the working condition identification map MAP; Different intake flow calculation modes are switched at positions in...

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Abstract

The invention discloses a control method for diesel engine air inlet flow calculation. The control method comprises the following steps of taking the engine rotating speed and the circulating oil injection quantity as an X axis and a Y axis of a working condition recognition graph; switching different air inlet flow calculation modes according to positions corresponding to different engine rotating speeds and different circulating fuel injection quantities in the working condition recognition graph; and after the different air inlet flow calculation modes are switched, achieving smooth transition of the air inlet amount through time filtering. According to the control method for the diesel engine air inlet flow calculation provided by the invention, the problem that the intake flow calculation of an intake flow sensor or an intake model is inaccurate due to pipeline arrangement and signal drifting under the low-speed or low-load working condition can be effectively solved through the method for controlling the intake flow calculation of an electronic control diesel engine in a segmented mode, and it is guaranteed that the engine operates stably.

Description

technical field [0001] The invention relates to the field of calculation and control of intake air volume of a diesel engine, in particular to a calculation method for controlling the intake air volume in sections according to the fuel injection volume and rotational speed of the engine, so as to realize the use of different intake air volume calculation methods under different working conditions Control method of segmental calculation of intake air volume. Background technique [0002] In the current use of diesel engines, there is only one algorithm for the calculation of air intake during system operation, and it is impossible to switch algorithms according to working conditions; current applications such as image 3 Shown: [0003] Among them: PFM-air flow sensor based on intake pressure, HFM-based on hot film air mass flow sensor, TFI4-intake flow meter; velocity density method: [0004] [0005] It can be seen that currently only one algorithm can be selected for t...

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Application Information

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IPC IPC(8): F02D41/24
CPCF02D41/2422Y02T10/40
Inventor 陈杰陆寿域董祥欢周健杨淇竣
Owner GUANGXI YUCHAI MASCH CO LTD
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