A Gasoline Engine In-Cylinder Water Injection Detection Control System and Its Application

Abstract

The invention relates to a cylinder internal water spraying detection control system for a gasoline engine and application of the cylinder internal water spraying detection control system. The cylinder internal water spraying detection control system comprises a gasoline engine cylinder body, a high-voltage silicon rectifier stack, a voltage component, adaptive resistors, a signal processing device and a microprocessor, wherein a sparking plug and a water spraying nozzle are arranged in the gasoline engine cylinder body; the sparking plug is connected with an ignition device; the voltage component applies voltage to form a directional electrical field between the sparking plug and the gasoline engine cylinder body; an ion product generated by combustion in the gasoline engine cylinder body directionally moves to form ion current; the ion current serves as a voltage signal in the adaptive resistors; the voltage signal is fed to the microprocessor through the signal processing device; and the microprocessor makes decision and controls the water spraying nozzle to carry out voltage action. Compared with the prior art, the cylinder internal water spraying detection control system disclosed by the invention has the advantages that real-time online detection and feedback control of the water spraying process are realized by using an amplitude of an ion current signal, so that a water spraying technology is effectively controlled in time, a water spraying control signal and a water spraying action are synchronously carried out, the combustion process is optimized, and the sensitivity, the timeliness and the accuracy in control are realized.

Description

Technical field [0001] The invention belongs to the technical field of internal combustion engines, and specifically relates to a gasoline engine in-cylinder water injection detection and control system and its application. Background technique [0002] Energy conservation and emission reduction are becoming stricter at home and abroad. Small-displacement turbocharged gasoline engines have been vigorously promoted and applied, effectively reducing fuel consumption and pollutant emissions in the transportation field. However, as the combustion intensity in the cylinder increases, such as knock, super knock, etc. Abnormal combustion phenomena place higher requirements on the combustion stability and durability of gasoline engines. In order to effectively control the abnormal combustion caused by high pressure and high load, the in-cylinder water injection technology has gradually attracted the attention of domestic and foreign research institutions and vehicle manufacturers. The i...

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Problems solved by technology

[0003] However, it is worth noting that the water spray process needs to be precisely controlled to avoid the influence of water mist on the combustion flame propagation, and water is different from gasoline, which has a poor lubricating effect on the nozzle, prone to nozzle failure, and easy to cause water spray The control signal is not synchronized with the water injection action, the water injection technology cannot be effectively and timely controlled, and the combustion process cannot be optimized

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