Dual-fuel engine combustion system and control method thereof

Abstract

The invention aims at providing a dual-fuel engine combustion system capable of giving consideration to performance and emission and a control method thereof. The dual-fuel engine combustion system comprises a cylinder body, a cylinder cover and a piston, wherein the cylinder body, the cylinder cover and the piston form a combustion chamber, and the combustion chamber is provided with an air intake channel and an exhaust channel and is also internally provided with a spark plug. The dual-fuel engine combustion system is characterized in that the air intake channel is internally provided with a first gasoline nozzle communicated with a gasoline supply system, and the combustion chamber is internally provided with a first alcohol nozzle communicated with an alcohol supply system. The dual-fuel engine combustion system has simple structure and low reconstruction cost, and can be applied by only little reconstructing the traditional combustion system. By adopting the control method of the dual-fuel engine combustion system, the problems of low ignition success rate and overproof emission of the cold-starting stage are solved, the dual-fuel engine combustion system is driven under different load states by adopting different kinds of fuels, and oil consumption and emission are reduced on the premise of improving high-speed power and low-speed torque of the engine.

Description

technical field [0001] The invention belongs to the field of internal combustion engines, and in particular relates to a dual-fuel engine combustion system and a control method thereof. Background technique [0002] With the rise of oil prices and increasingly stringent emission regulations, engines with low pollution, low fuel consumption, high power, and high torque have gradually become the design goals of engine engineers. The power output, the compression ratio is often designed around 10 to prevent the occurrence of full-load knocking, so that the efficiency of gasoline engines working under high load conditions is often not high. [0003] At present, there are also some ethanol-fueled vehicles, and the emission performance has been greatly improved. However, due to the high ignition point of ethanol, it is difficult to ignite such vehicles at low temperatures, thus limiting their use. Contents of the invention [0004] The object of the present invention is to prop...

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Problems solved by technology

[0002] With the rise of oil prices and increasingly stringent emission regulations, engines with low pollution, low fuel consumption, high power, and high torque have gradually become the design goals of engine engineers. The power output, the compression ratio is usually designed around 10 to prevent the occurrence of full-load knocking, so that the efficiency of gasoline engines under high-load conditions is often not high

[0003] At present, there are also some ethanol-fueled vehicles, and the emission performance has been greatly improved. However, because of the high ignition point of ethanol, it is difficult to ignite this type of vehicle at low temperature, thus limiting its use.

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