Engine control method and controller used for bench test and bench test system

Abstract

The embodiment of the invention provides an engine control method and a controller used for a bench test and a bench test system. The method includes the steps that all parameters when an engine works are obtained; and at least one of the air-fuel ratio, the ignition advance angle and operation of the engine is intelligently controlled according to the obtained parameters. The air-fuel ratio of the engine is intelligently controlled according to the obtained air-fuel ratio and the obtained exhaust temperature. The ignition advance angle of the engine is intelligently controlled according to the obtained combustion signal. The combustion signal includes at least one of the cylinder pressure peak value, the heat release 50% crank angle and the maximum cylinder pressure crank angle. The operation of the engine is intelligently controlled according to the obtained operation signal. The operation signal includes at least one of the engine torque, the engine rotating speed, the pressurization pressure, the turbine rotating speed and the engine power. By means of the engine control method and the controller used for the bench test and the bench test system, accurate and safe control over the engine can be achieved without calibration or online control parameter regulation.

Description

technical field [0001] The invention relates to the technical field of engine control, in particular to an engine control method, a controller and a bench test system for bench tests. Background technique [0002] The engine bench test can be used to check the reliability of the engine as a whole and related components, and can also be used to verify whether the performance of the engine meets the design indicators, etc. The equipment involved in the engine bench test generally includes: engine (as the test object), measurement control system and auxiliary system, etc.; among them, the measurement control system can include: engine controller and various sensors, and various sensors are used to control the engine. The engine controller is used to control the engine based on the parameters collected by various sensors and combined with the control model (for example: charging model, exhaust temperature model, torque model). [0003] At present, in the bench test, it is gener...

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Problems solved by technology

[0003] At present, in the bench test, it is generally necessary to continuously calibrate the control models such as the inflation model, exhaust temperature model and torque model according to the experimental conditions, so as to ensure the accuracy and safety of the control when the engine is assembled into the complete machine , and the calibration work is a very time-consuming and labor-intensive work. For example, the calibration of the inflation model takes about two months, the calibration of the exhaust temperature model needs to be calibrated in the wheel hub test room, and the calibration of the torque model takes about It will take one month, however, in order to ensure the high performance and safety of the engine when it is used in the whole machine, it is necessary to carry out such calibration work

[0004] However, currently in the bench test, some engines are generally not assembled into the whole machine, which is mainly used to test the performance of the engine to help correct the design of the engine or others; Do accurate and safe control, otherwise the obtained results will be meaningless, but at this time, if the engine controller is calibrated to ensure the accuracy and safety of the control, it is obviously a big problem in terms of time and cost. Therefore, the general method adopted is to monitor the operation of the engine online by the electronic control engineer, and then adjust the control parameters of the engine controller according to the operating conditions to meet the needs of various bench tests of the engine. However, this method is very demanding for the electronic control engineer. High, not only requires the electrical control engineer to have a very high level of electrical control technology, but also requires the electrical control engineer to have very rich experience

[0005] Therefore, in the prior art, if the engine controller is not calibrated or the electronic control engineer adjusts the control parameters online, it will not be easy to achieve accurate and safe control of the engine

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