Combustion air-fuel ratio control method of hydrogen internal combustion engine

Abstract

The invention discloses a combustion air-fuel ratio control method of a hydrogen internal combustion engine, which is characterized by comprising the following steps of: presetting air-fuel ratio calibration data of the engine, wherein the air-fuel ratio calibration data comprises a target air-fuel ratio and engine working condition data corresponding to target air-fuel ratio; detecting real-time working condition of the engine, comparing the preset air-fuel ratio calibration data according to the real-time working condition data of the engine to obtain a corresponding target air-fuel ratio, calculating through a set program according to the target air-fuel ratio to obtain oil injection, air inlet and ignition angle control data; and respectively controlling a nozzle, an electronic air damper and an ignition coil according to the obtained oil injection, air inlet and ignition angle control data so as to control the engine to operate under the target air-fuel ration. According to the invention, the hydrogen internal combustion engine operates in a control region with better dynamic property, discharge property and safety, thus the economic efficiency, the discharge property and the safety are effectively increased, and enough dynamic property is ensured.

Description

technical field [0001] The invention relates to the technical field of hydrogen-powered vehicle fuel control, in particular to a combustion air-fuel ratio control method of a hydrogen internal combustion engine. Background technique [0002] In recent years, the technical level of the automobile industry has developed rapidly, and people have put forward more stringent requirements on the power, economy, emission, and safety of automobiles. As the power source of a car, the engine determines the economy, power, emission and safety of the vehicle to a large extent. Hydrogen internal combustion engine, that is, hydrogen fuel engine, has attracted more and more attention because of its excellent emission performance and good power output. At the same time, the hydrogen internal combustion engine also has its technical difficulties, such as the hydrogen combustion speed is too fast, the combustion temperature is too high, and the cruising range of the vehicle is small. [0003...

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Problems solved by technology

At the same time, the hydrogen internal combustion engine also has its technical difficulties, such as the hydrogen combustion speed is too fast, the combustion temperature is too high, and the cruising range of the vehicle is small.

[0003] At present, the air-fuel ratio control of hydrogen internal combustion engines generally specifies a certain value. Such control is not the optimal configuration under different working conditions, and the comprehensive performance of power, economy, emissions and safety is poor.

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