Diagnosis method and system of natural gas engine supercharger control system

• Main Authors: ZHANG PENG, ZHANG GUIMING, ZHU HAO, YANG XUEZHU, LI SUWEN, CAI PENG
• Format: Patent
• Language: Chinese; English
• Published: 28.09.2018
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

The invention provides a diagnosis method of a natural gas engine supercharger control system. The method is used for diagnosing an air source pipeline, a pressure reducer and a supercharger control valve of the control system, and comprises the following steps that working conditions of an engine are judged; when the engine is located in preset working conditions not influencing normal operationof the engine, the following diagnosis operations are carried out: a duty ratio of the supercharger control valve is set as 0; the air source pipeline and the pressure reducer are diagnosed based on the air source pressure provided to the supercharger control valve and acquired outlet pressure discharged by the supercharger control valve; and under the condition of determining no fault of the airsource pipeline and the pressure reducer, the duty ratio of the supercharger control valve is adjusted, and the circulating characteristics of the supercharger control valve are diagnosed based on theoutlet pressure of the sup