Fuel on-line detection method of gasoline and diesel oil mixing flexible fuel engine

Abstract

The invention relates to a fuel on-line detection method of a gasoline and diesel oil mixing flexible fuel engine. The fuel on-line detection method is characterized in that power equipment is used, and the power equipment comprises an engine electronic control unit, a flexible fuel compression ignition engine, a piezoresistive cylinder pressure sensor and a fuel recognition electronic control unit; the fuel recognition electronic control unit comprises a circulating fuel-injection quantity calculating module, an accumulative heat release calculating module, a fuel volume calorific value calculating module and a fuel recognition module; the engine electronic control unit collects the fuel temperature, the rail pressure and the injection time, and the piezoresistive cylinder pressure sensor collects cylinder pressure and sends the cylinder pressure to the fuel recognition electronic control unit; the circulating fuel-injection quantity calculating module calculates the circulating fuel-injection quantity and sends the circulating fuel-injection quantity to the fuel volume calorific value calculating module; the accumulative heat release calculating module calculates the circulating accumulative heat release and sends the circulating accumulative heat release the fuel volume calorific value calculating module; the fuel volume calorific value calculating module calculates the volume calorific value of mixing fuel and sends the volume calorific value of the mixing fuel to the fuel recognition module; the fuel recognition module calculates the mixing ratio and feeds back the mixing ratio to the engine electronic control unit to perform closed-loop control. The fuel on-line detection method can be widely applied to the on-line detection of engine fuel.

Description

technical field [0001] The invention relates to the technical field of electronically controlled engine control, in particular to an on-line fuel detection method for gasoline and diesel blended flexible fuel engines. Background technique [0002] Traditional diesel engines usually adopt high compression ratio compression ignition, which has high thermal efficiency, but there is a contradictory relationship between the emission of nitrogen oxides and particulate matter, and the emission of nitrogen oxides is positively correlated with thermal efficiency, and the post-treatment equipment is expensive. The homogeneous compression ignition combustion theory not only has the potential to simultaneously reduce nitrogen oxides and particulate matter emissions, but also does not affect thermal efficiency, so it has become an important direction for diesel engine improvement. However, whether it is gasoline or diesel, many problems have been encountered in the process of realizing h...

AI Technical Summary

Problems solved by technology

However, the problem faced by gasoline and diesel blended fuel for compression ignition combustion is the need to detect the blending ratio of f

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