Engine control parameter online calibration device and method combining genetic algorithm and extreme value search algorithm

A technology of engine controller and control parameters, which is applied in the direction of engine testing, genetic rules, measuring devices, etc., can solve the problems of time consumption, long calibration time, short calibration time, etc., and achieve fast convergence and accurate search results

Active Publication Date: 2020-06-26
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0017] The genetic algorithm will generate a large number of control parameter combinations, so a large number of tests are required to solve the optimization objective function. Since the test is carried out in real time on the engine bench, it takes a certain amount of time to test each set of control parameters. The calibration time is very long;
[0018] The extreme value search algorithm has a fast convergence time and a short calibration time, but the research object is generally a convex optimization problem, and its local optimum is the global optimum; while the relationship between the engine control parameter input and the performance response output is a nonlinear and non-convex optimization problem, There are multiple local optimal points, and the local optimal point is not necessarily the global optimal point

Method used

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  • Engine control parameter online calibration device and method combining genetic algorithm and extreme value search algorithm
  • Engine control parameter online calibration device and method combining genetic algorithm and extreme value search algorithm
  • Engine control parameter online calibration device and method combining genetic algorithm and extreme value search algorithm

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Embodiment 1

[0052] This embodiment provides a device for online calibration of engine control parameters combined with genetic algorithm and extreme value search algorithm, as shown in the attached figure 1 As shown, the device includes engine, dynamometer, engine controller, combustion analyzer, MircoAutoBox rapid control prototype and dynamometer upper computer control system, engine controller upper computer, MircoAutoBox rapid control prototype upper computer.

[0053] The engine and the dynamometer are connected by a coupling. The main functions of the dynamometer are to provide the starting speed for the engine to start; to fix the engine speed to ensure a stable operating condition; to measure the torque of the engine, etc.

[0054] The engine controller is used to control various actuators on the engine, receive signals collected by various sensors, and communicate with the engine controller host computer through the CAN bus.

[0055] The combustion analyzer collects the in-cylind...

Embodiment 2

[0061] as attached image 3As shown, this embodiment provides a method for online calibration of engine control parameters that combines the genetic algorithm and the extreme value search algorithm. speed; then start, the engine runs stably at the preset operating speed, and the control system of the upper computer of the dynamometer can monitor the state of the dynamometer and the dynamic indicators such as engine torque in real time; then set the throttle through the upper computer of the engine controller Opening, determine the operating conditions, and detect the engine exhaust temperature, cooling water temperature and other states in real time; then turn on the automatic calibration switch of the control parameters on the MircoAutoBox rapid control prototype host computer to perform automatic calibration of the control parameters; the combustion analyzer Collect and calculate the IMEP of the engine in real time during the whole process, and continuously send the IMEP inf...

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Abstract

The invention relates to the technical field of engine parameter automatic calibration methods, in particular to an engine control parameter online calibration device and method combining a genetic algorithm and an extreme value search algorithm. The device comprises an engine, a dynamometer, an engine controller, a combustion analyzer, a MicoAutoBox rapid control prototype, a dynamometer upper computer control system, an engine controller upper computer, a MicoAutoBox rapid control prototype upper computer and a CAN bus communication system. The invention relates to the online automatic calibration device for engine control parameters. Control parameters are continuously changed through an optimization algorithm under the fixed working condition of the engine, and an optimization objective function is solved, so the automatic optimization of control parameters is realized; in the online automatic optimization process of the control parameters, an optimization algorithm combining a genetic algorithm and an extreme value search algorithm is used, the defects that genetic algorithm test control parameter combinations are many, and optimization time is long are overcome, and the defects that the extreme value search algorithm can only solve the convex optimization problem and is prone to converge to the local optimal point are also avoided.

Description

technical field [0001] The invention relates to the technical field of automatic calibration methods for engine parameters, in particular to a device and method for online calibration of engine control parameters combined with a genetic algorithm and an extreme value search algorithm. Background technique [0002] When the engine is running, it relies on the engine controller (ECU) to send execution instructions to various actuators on the engine, such as fuel injectors and ignition coils, according to the engine operating conditions (speed and throttle opening determination conditions) . Taking the fuel injector as an example, including the opening time, opening time, etc., the execution commands of these actuators are collectively called control parameters. If you want to ensure that the engine can run stably in a certain working condition, you must ensure that the control parameters in this working condition are set reasonably. However, the control parameters set with t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/00G05B23/02G06F30/20G06N3/12
CPCG01M15/00G05B23/0213G06N3/126
Inventor 李鸿黄英何蔚梁岳芸鹏王绪李永亮王健
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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