Exhaust back pressure control method and device of engine

• Main Authors: SUN FEI, YAN BINGCHAO, WANG QIAN, CAO YINBO, NI CHUANQIN
• Format: Patent
• Language: Chinese; English
• Published: 20.01.2023
• Subjects: BLASTING; CALCULATING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; COMPUTING; CONTROLLING COMBUSTION ENGINES; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; PHYSICS; WEAPONS

The invention provides an exhaust back pressure control method and device for an engine, and the method comprises the steps: obtaining the maximum exhaust back pressure allowed by the engine, and obtaining the actual exhaust back pressure of the engine; comparing the maximum exhaust back pressure with the actual exhaust back pressure; under the condition that the actual exhaust back pressure exceeds the maximum exhaust back pressure, first maximum supercharging pressure allowed by the engine is calculated based on the maximum exhaust back pressure; and the maximum inflation efficiency allowed by the engine is calculated according to the first maximum supercharging pressure, and the inflation efficiency of the engine is controlled based on the maximum inflation efficiency. According to the method, the risk that the exhaust back pressure in the engine exceeds the maximum theoretical design threshold value can be reduced, and parts of the engine are effectively protected. 本发明提供一种发动机的排气背压控制方法及装置，包括：获取发动机所允许的最大排气背