Refueling control method for automobile high pressure fuel tank

Abstract

The invention discloses an oil filling control method used for an automobile high-pressure oil tank. The oil filling control method comprises the steps that firstly, a driver presses an oil filling request button, and an automobile body controller sends oil filling request information to wake up an engine controller; secondly, the engine controller controls a pressure valve of the oil tank to openand relieve the pressure; thirdly, the engine controller feeds pressure relief status information back to the automobile body controller , if a pressure relief completion signal is received, the fourth step is carried out, if a pressure valve open failure or pressure relief failure signal is received, oil filling is not allowed unless an oil filling door is popped open, and if a feedback signal is not received, oil filling is not allowed unless the oil filling door is popped open by the automobile body controller; fourthly, the automobile body controller controls the automobile body oil filling door to pop open, and oil filling starts; and fifthly, oil filling is completed, the automobile body controller receives an automobile body oil filling door closing signal and then feeds the automobile body oil filling door closing signal back to the engine controller, and the engine controller closes the pressure valve of the high-pressure oil tank. It can be guaranteed that the pressure in the high-pressure oil tank is within a safe range through pressure relief control before the oil filling door is opened.

Description

technical field [0001] The invention relates to a method for refueling and releasing pressure of an automobile, in particular to a method for controlling refueling of a high-pressure fuel tank of an automobile. Background technique [0002] For hybrid and traditional fuel vehicles that use high-pressure fuel tanks, the driver’s refueling request needs to be pressure-released from the high-pressure fuel tank to ensure that the pressure in the high-pressure fuel tank is within the safe design range. If the pressure in the high-pressure fuel tank exceeds the safe design When the fuel tank door is opened, it may cause harm to the human body, and at the same time, the oil vapor will overflow and damage the environment. At present, in the existing automobile market, only hybrid vehicles using high-pressure fuel tanks have passed China's National VI regulations for motor vehicles, and there are no traditional fuel vehicles using high-pressure fuel tanks. Contents of the invention...

AI Technical Summary

Problems solved by technology

[0002] For hybrid and traditional fuel vehicles that use high-pressure fuel tanks, the driver’s refueling request needs to be pressure-released from the high-pressure fuel tank to ensure that the pressure in the high-pressure fuel tank is within the safe design range. If the pressure in the high-pressure fuel tank exceeds the safe design range, when the fuel tank door is opened, it may cause harm to the human body, and at the same time, oil vapor will overflow and damage the environment

At present, in the existing automobile market, only hybrid vehicles using high-pressure fuel tanks have passed China's National VI regulations for motor vehicles, and there are no traditional fuel vehicles using high-pressure fuel tanks

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