Control method for high-pressure oil tank system of hybrid electric vehicle

Abstract

The invention discloses a control method for a high-pressure oil tank system of a hybrid electric vehicle, which has the main design conception that the high-pressure oil tank system of the hybrid electric vehicle can be safely decompressed or boosted through the control of an oil tank isolating valve and a carbon tank electromagnetic valve in the refueling stage and the normal monitoring of the pressure of an oil tank; meanwhile, the activated carbon tank only adsorbs oil gas generated in the refueling stage, and the oil gas can be stored in a high-pressure oil tank or discharged into an engine for combustion under other pressure adjusting working conditions, so that the problem that the oil gas of the hybrid vehicle overflows from an atmosphere port of the carbon tank can be effectively solved, the discharging risk of the hybrid vehicle is greatly improved, and the service life of the hybrid vehicle is prolonged. And the hybrid power vehicle can meet the requirements of emission regulations.

Description

technical field [0001] The invention relates to the technical field of electric control of a fuel tank system of a hybrid vehicle, in particular to a control method for a high-pressure fuel tank system of a hybrid vehicle. Background technique [0002] With the implementation of National VI emission regulations on evaporation and refueling, due to the short engine running time of hybrid vehicles during driving, there are few opportunities for the carbon tank to be flushed, so that the oil and gas in the carbon tank cannot be fully flushed in time, thereby increasing the flow of oil and gas from the carbon tank's atmospheric port. In addition, the pressure control of the high-pressure fuel tank system (including the aforementioned carbon tank components) used in hybrid vehicles in the industry and the control of the oil and gas direction are not perfect, which also makes the oil and gas The emissions problem is getting worse. Contents of the invention [0003] In view of t...

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Problems solved by technology

[0002]With the implementation of National VI emission regulations on evaporation and refueling, due to the short engine running time of hybrid vehicles during driving, there are few opportunities for carbon tank flushing, resulting in carbon tank The oil and gas in the tank cannot be flushed in time, which increases the risk of oil and gas overflowing from the large port of the carbon tank, making it difficult to comply with relevant regulations; The control and the control of the direction of oil and gas are not perfect, which also makes the problem of oil and gas emissions worse

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