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A method for calibrating the parameters of the fractional main spray

A technology for parameter calibration and parameter calibration, which is used in fuel injection devices, engine testing, and machine/structural component testing to achieve the effects of low fuel consumption, reduced calibration complexity, and guaranteed accuracy.

Active Publication Date: 2021-09-07
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, how to determine the parameters of the first main injection and the second main injection so that the engine can achieve the best performance, and how to reduce the complexity of the calibration while ensuring the calibration accuracy is an urgent problem to be solved

Method used

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  • A method for calibrating the parameters of the fractional main spray
  • A method for calibrating the parameters of the fractional main spray
  • A method for calibrating the parameters of the fractional main spray

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Embodiment Construction

[0030] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a s...

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Abstract

The invention relates to the technical field of engines, and discloses a method for calibrating the parameters of the divided main injection, comprising the following steps: setting the first main injection reference start angle, the first main injection reference The fuel injection quantity and the reference fuel injection quantity of the second main injection; the reference start angle of the first main injection, the reference fuel injection quantity of the first main injection and the reference fuel injection quantity of the second main injection are taken as quantification, and the first main injection The interval angle of the crankshaft angle between the injection and the second main injection is a variable, and the reference interval angle is determined under the condition that the burst pressure meets the standard burst pressure and the nitrogen oxide emission meets the standard nitrogen oxide emission. Then use the reference start angle and the reference interval angle as quantitative, adjust the first main spray power-on time and the second main spray power-on time, and determine the first main spray calibration power-on time and the second main spray calibration power-on time Time, so as to determine the calibration injection volume of the first main injection and the calibration injection volume of the second main injection. This calibration method reduces the complexity of calibration.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a method for calibrating parameters of fractionated main injection. Background technique [0002] At present, multiple injection technology has been widely used in high-pressure common rail diesel engine systems. Multiple injections include pre-injection, main injection and post-injection. The main purpose of pre-injection is to reduce noise; the purpose of post-injection is to reduce soot and Increase exhaust temperature. [0003] The main optimization goal of the above-mentioned multiple injection method is to improve noise or emission by adding a small amount of injection before and after the main injection, which will lead to increased fuel consumption. Moreover, the above-mentioned application of multiple injections has little effect on the main fuel injection quantity, and the diesel that contributes torque is still injected into the cylinder with the maximum injection qua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M65/00
CPCF02M65/001
Inventor 孙楠楠王晓艳陈学东贾德民冯瑞祥石磊
Owner WEICHAI POWER CO LTD
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