System and method for detecting leakage of fuel evaporation system

• Main Authors: ZHANG JIAN, LIU WEIBIAO, REN HAOPENG
• Format: Patent
• Language: Chinese; English
• Published: 06.06.2023
• Subjects: BLASTING; COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

The invention discloses a system for detecting leakage of a fuel evaporation system, and belongs to the technical field of oil gas leakage detection.The system comprises an electric control module, a pressure pump, a pressure sensor set and a gasoline volatile gas sensor, an oil tank is communicated with a carbon tank through a first pipeline, and the carbon tank is communicated with the pressure pump through a second pipeline; and the pressure sensor group, the volatile gas sensor and the pressure pump are electrically connected with the electric control module. According to the invention, a gasoline volatile gas sensor signal and a pressure sensor group signal are fitted, so that the detection precision and the detection frequency of leakage detection of the fuel evaporation system are improved; a standard leakage hole is formed, an electric control module is used for fitting a pressure change signal curve, the pressure change signal curve is compared with a pressure change curve of the standard leakage hol