Single-cylinder engine bench experiment system with reverse towing function, and control method of single-cylinder engine bench experiment system

Abstract

The invention discloses a single-cylinder engine bench experiment system with the reverse towing function, and a control method of the single-cylinder engine bench experiment system. The system comprises a dynamometer, a signal acquisition system, an experiment cylinder and other cylinders both isolated from a multi-cylinder engine. The experiment cylinder is provided with an experiment cylinder air inlet system, an experiment cylinder air exhaust system and an experiment cylinder air inlet channel oil injection system. Other cylinders are provided with other cylinder air inlet systems and other cylinder air exhaust systems. The experiment cylinder and other cylinders simultaneously have an in-cylinder direct injection oil spraying system. According to the invention, a method for achievinga preset rotating speed of the experiment cylinder is realized through the reverse towing of other cylinders. Therefore, the requirement of an experiment bench on the dynamometer is simplified. The air inlet pressure, the air inlet temperature and the rotating speed of the experiment cylinder are maintained at constant values through intelligently controlling the experiment cylinder after the adoption of different oil spraying strategies by the experiment cylinder. Compared with a method for calculating the indicating power of the experiment cylinder according to the instantaneous pressure inthe cylinder, the above calculation method for calculating the indicating power of the experiment cylinder is more accurate.

Description

technical field [0001] The invention relates to the field of engine bench experiments, in particular to a single-cylinder engine bench experiment system with a back-drag function and a control method thereof. Background technique [0002] Bench test is an essential link in the engine development process. Considering that during the bench test, there are many factors that affect the operation of the engine, such as intake state parameters (intake pressure and intake temperature) and fuel injection strategy (injection volume and injection timing), the engine It is particularly important to precisely control the input parameters. In addition, some researchers have proposed in recent years that when the load of the compression ignition engine is large, the combination of low-activity fuel injection into the intake port and direct diesel injection in the cylinder can reduce the proportion of diesel diffusion combustion in the cylinder, making the cylinder The internal combustio...

AI Technical Summary

Problems solved by technology

However, this combustion mode is still in the stage of a large number of experimental verifications and has high requirements for the infrastructure of the bench test platform, especially the need for the dynamometer to have a reverse drag function

[0003] At present, the experimental research on whether the homogeneous premixed gas formed in the cylinder of the fuel injected into the intake port (such as gasoline, butanol) can undergo high-temperature exothermic reaction under the condition that the intake state parameters reach a certain value still less

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