Method and device for selecting operating points

A working point and chemical technology, applied in the field of working point selection method and device, can solve the problem that the effect cannot be guaranteed, and achieve the effect of standardizing the selection of the working point and the reasonable selection of the working point.

Active Publication Date: 2014-08-06
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at this stage, the selection of working point is still based on experience, so the effect cannot be guaranteed
At present, there is no standardized method and strategy, which can realize the reasonable selection of working point

Method used

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  • Method and device for selecting operating points
  • Method and device for selecting operating points
  • Method and device for selecting operating points

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Embodiment Construction

[0058] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0059] The three standard tests of the Euro 6 regulations are: steady state test cycle (WHSC) with transitional conditions, transient test cycle (WHTC) and no-exceeding area test (WNTE). A number of normalized condition ratios are given in each standard test, the so-called normalized condition ratio is the ratio of torque to rotational speed,...

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Abstract

An embodiment of the invention provides a method and a device for selecting operating points. The method includes acquiring performance parameters of engines according to design external characteristics of the engines by means of computing; extracting given normalization operating proportions in standard tests; acquiring operating points of the engine in the standard tests by means of computing by the aid of the performance parameters and the operating proportions; generating visual graph spectra according to the operating points, selecting a preset quantity of pre-selection operating points from the visual graph spectra, optimizing the performance of the pre-selection operating points, acquiring the optimal electronic control parameter values corresponding to the pre-selection operating points and acquiring integral pulse spectra of electronic control parameters by means of interpolation. The pre-selection operating points include world harmonized steady-state cycle (WHSC) operating points with transient operation, world harmonized transient cycle (WHTC) operating points and non-exceeding regional test (WNTE) operating points. The method and the device have the advantages that the operating points can be selected in a standardized and normalized manner; the operating points which are designed experimentally can be selected reasonably, and the method and the device are favorable for optimizing the pulse spectra in follow-up procedures.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a method and device for selecting a working point. Background technique [0002] Euro 6 regulations are a set of heavy-duty vehicle emission standards implemented in the sixth stage of the European Union. In response to new regulations, vehicle performance standards, as well as design and testing, need to be adapted. Therefore, how to optimize the map according to the Euro 6 regulations has become an urgent problem to be solved. If it is necessary to realize map optimization according to the Euro 6 regulation, the first problem is to select the operating point for testing according to the standard of the Euro 6 regulation, and then use the operating point to perform the map optimization test. [0003] The so-called operating point means that the state of the engine is below the specified speed and specified torque. The selection of the working point needs to follow three speci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/00
Inventor 张斌吴淑梅桑海浪
Owner WEICHAI POWER CO LTD
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