Calibration method and device for gasoline hydrogenated engine

Abstract

The invention discloses a calibration method and calibration device for a gasoline-hydrogen fueled engine. The calibration method comprises the following steps: regulating gas-jetting pulse width of an engine and obtaining multiple corresponding equivalent air-fuel ratios; obtaining minimum-ignition advance angles MBT of maximum torques corresponding to the multiple equivalent air-fuel ratios, and recording multiple specific fuel consumptions of the engines; obtaining optimal specific fuel consumption and recording the gas-jetting pulse width corresponding to the optimal specific fuel consumption as well as equivalent air-fuel ratios and ignition advance angles under the gas-jetting pulse width, and respectively calibrating to-be-calibrated rotation speed and to-be-calibrated gas-jetting pulse width, the equivalent air-fuel ratios and ignition advance angles under the gas inlet pressure of the engine. The calibration method for the gasoline-hydrogen fueled engine of the embodiment of the invention can greatly improve the exhaustion of the gasoline-hydrogen fueled engine relative to the exhaustion of the same-displacement gasoline engine, so that the exhaustion requirements of national locomotive can be satisfied, and the engine reaches the best dynamic property and economical efficiency.

Description

technical field [0001] The invention relates to the field of engine calibration methods, in particular to a calibration method and device for gasoline hydrogen-doped engines. Background technique [0002] Since hydrogen has the characteristics of short quenching distance, fast flame propagation speed, good emission characteristics, and strong diffusion ability, when the mixed fuel mixed with hydrogen and other fuels is used as the fuel for the engine, the combustion speed is higher. The mixture of fuel and air is more uniform and burns more completely. At present, a hydrogen-gasoline dual-fuel engine has appeared. When the engine starts and idles, only hydrogen is used as the engine fuel; when the intake pressure increases, the quality of the hydrogen fuel added to the engine remains constant, and the amount of gasoline is gradually increased. quality. When the above-mentioned hydrogen-gasoline dual-fuel engine is fueled with hydrogen-gasoline dual fuel, the fuel consumpti...

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Problems solved by technology

[0003] However, the current research on hydrogen-gasoline dual-fuel engines only studies the combustion characteristics of hydrogen-doped engines through simple test methods to qualitatively analyze the impact of hydrogen on gasoline engines, and has not done research on hydrogen-doped gasoline engines Over-calibration, it is difficult to achieve the best power and economy of gasoline hydrogenated engine

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