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A method for on-line detection and evaluation of fuel collision

A technology of fuel oil and injection holes, which is applied in the direction of instruments, geometric CAD, calculation, etc., can solve the problem of no online detection function of fuel collision, and achieve the effect of avoiding oil dilution, avoiding fuel collision, and ensuring real-time performance

Active Publication Date: 2019-08-16
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the current control strategy, there is no special online detection function for fuel collision

Method used

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  • A method for on-line detection and evaluation of fuel collision
  • A method for on-line detection and evaluation of fuel collision
  • A method for on-line detection and evaluation of fuel collision

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Embodiment Construction

[0041] This specific embodiment provides an online detection and evaluation method for fuel collision, which can accurately evaluate fuel collision in real time.

[0042] Hereinafter, an embodiment will be described with reference to the drawings. In addition, the examples shown below do not limit the content of the invention described in the claims in any way. In addition, all the contents of the configurations shown in the following embodiments are not limited to be essential to the solutions of the invention described in the claims.

[0043] The overall flow diagram provided in this embodiment, such as figure 1 shown. The fuel collision online detection and evaluation method provided in this embodiment requires three types of input: engine parameters, engine real-time running signals and user calibration parameters. The fuel collision online detection and evaluation module formed by the fuel collision online detection and evaluation method can include four types. Three s...

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Abstract

The invention discloses an online detection and evaluation method of fuel impingement. The online detection and evaluation method comprises the following steps of calculating the current position of a piston and the volume in a cylinder of an engine according to cylinder diameter, stroke, connecting rod length, rotating speed, cam shaft phase and compression ratio collected; calculating the density and the temperature of gas in the current cylinder according to the current position of the piston and the volume in the cylinder of the engine, the gas quality and flow, the pressure after intercooling, the temperature after intercooling, EGR (Exhaust Gas Recirculation) rate and calibration parameter; calculating the real-time spraying pressure of the whole spraying process according to the diameter of spraying holes, the conical angle of the spraying holes, the number of the spraying holes, the flow coefficient of a spraying nozzle, the rail pressure, the electrifying time and the calibration parameter; judging whether the phenomenon of fuel impingement occurs according to the density and the temperature of gas in the cylinder, the real-time spraying pressure of the whole spraying process, the diameter of spraying holes, the number of the spraying holes and the flow coefficient of the spraying nozzle. The online detection and evaluation method disclosed by the invention has the advantages that by the arrangement, the fuel impingement can be accurately evaluated in real time.

Description

technical field [0001] The invention relates to the technical field of vehicle engines, and more specifically relates to an online detection and evaluation method for fuel collision. Background technique [0002] A large number of studies have shown that fuel pre-injection can reduce diesel engine NOx (nitrogen oxides) emissions and noise, and post-injection can reduce PM, HC emissions and increase exhaust temperature for after-treatment systems. The number of injections of advanced engines at home and abroad has reached 7 Second-rate. When performing pre-injection and post-injection, the piston is often far away from the compression top dead center, and the injected fuel can easily reach the cylinder wall, which will lead to serious HC (hydrocarbon) emission deterioration and oil dilution problems, increasing the wear of the diesel engine, Significantly shorten the life of key components. [0003] Whether the fuel hits the wall is related to multiple factors such as the g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/367
Inventor 李丕茂张朝阳张玲李云华
Owner WEICHAI POWER CO LTD
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