CN-117514478-B - Automatic oil supply system of internal combustion engine and control method thereof
Abstract
The invention relates to the technical field of fuel supply of internal combustion engines, in particular to an automatic fuel supply system of an internal combustion engine and a control method thereof, wherein the fuel supply system comprises a main fuel tank, a first auxiliary fuel tank, a second auxiliary fuel tank, an air compressor and a detection control module to form two independent oil ways and two independent air ways, and the detection control part is used for controlling the two auxiliary fuel tanks to alternately circulate and supply fuel by monitoring the pressure and the liquid level change of the auxiliary fuel tanks, and discharging mixed steam formed by air and fuel steam in the auxiliary fuel tank for supplying fuel before into an engine air inlet channel to finally enter the cylinder for combustion after the oil way is switched. The invention can solve the serious damage problem of the novel fuel to the pump and the pressure regulating valve, and the fuel supply system can supply fuel for a long time continuously, save fuel, reduce environmental pollution, and realize data monitoring such as fuel consumption rate.
Inventors
- TIAN WEI
- LI XUANTAO
- HAN ZHIQIANG
- WU XUESHUN
- YAN YAN
- WU YI
Assignees
- 西华大学
Dates
- Publication Date
- 20260512
- Application Date
- 20231025
Claims (3)
- 1. An automatic fuel supply system of an internal combustion engine is characterized by comprising a main fuel tank (1), a first auxiliary fuel tank (11), a second auxiliary fuel tank (12), an air compressor (7) and a detection control module (18); Oil path portion: The first oil outlet of the main oil tank (1) is connected to the oil inlet of the first auxiliary oil tank (11) through a first electric valve (2), and the oil outlet of the first auxiliary oil tank (11) is connected to the first oil inlet of the third three-way electric valve (15) through a first one-way valve (13); the second oil outlet of the main oil tank (1) is connected to the oil inlet of a second auxiliary oil tank (12) through a second electric valve (3), and the oil outlet of the second auxiliary oil tank (12) is connected to the second oil inlet of a third three-way electric valve (15) through a second one-way valve (14); an oil outlet of the third three-way electric valve (15) is connected to an oil rail (16), and an oil sprayer (17) is arranged on the oil rail (16); and the gas path part is as follows: The air outlet of the air compressor (7) is simultaneously connected to the air inlets of a first three-way electric valve (6) and a second three-way electric valve (8), the first air outlet of the first three-way electric valve (6) is connected to the air inlet of a first auxiliary oil tank (11), the first air outlet of the second three-way electric valve (8) is connected to the air inlet of a second auxiliary oil tank (12), and the second air outlets of the first three-way electric valve (6) and the second three-way electric valve (8) are commonly connected to an engine air inlet channel; and a detection control part: The first auxiliary oil tank (11) is internally provided with a first pressure sensor (4) and a first liquid level sensor (5), the second auxiliary oil tank (12) is internally provided with a second pressure sensor (10) and a second liquid level sensor (9), and signal output lines of the sensors and the electric valves are connected to a detection control module (18).
- 2. A control method of an automatic oil supply system of an internal combustion engine according to claim 1, characterized by comprising the steps of: After the oil supply pressure is set by a user, opening an air charging channel of a first three-way electric valve (6) between the air compressor (7) and a first auxiliary oil tank (11), enabling the air compressor (7) to start working as air charging in the first auxiliary oil tank (11), and after the first pressure sensor (4) detects that the gas in the tank reaches the set pressure, opening a first oil inlet of a third three-way electric valve (15), wherein the system starts to supply oil through the first auxiliary oil tank (11), and the air charging channel of the first three-way electric valve (6) is kept normally open when the first auxiliary oil tank (11) works; Step 2, when the liquid level in the first auxiliary oil tank (11) is lowered to a first early warning liquid level, opening an air charging channel of a second three-way electric valve (8) between the air compressor (7) and the second auxiliary oil tank (12) to enable the air compressor (7) to start working as air in the second auxiliary oil tank (12) to start charging; When the liquid level in the first auxiliary oil tank (11) drops to a second early warning liquid level, a first oil inlet of a third three-way electric valve (15) is closed, a second oil inlet is opened, an oil supply channel of an oil rail (16) is communicated with the second auxiliary oil tank (12), an air charging channel of a first three-way electric valve (6) connected with the first auxiliary oil tank (11) and an air compressor (7) is closed, a channel connected with an engine air inlet channel of the first three-way electric valve (6) is opened, high-pressure gas in the first auxiliary oil tank (11) starts to be decompressed, and mixed gas formed by air and fuel steam is discharged into the engine air inlet channel and finally enters a cylinder for combustion; And 4, when the first pressure sensor (4) in the first auxiliary oil tank (11) detects that the gas pressure is recovered to be normal, the pressure relief process is ended, the oil supplementing process is started, the first electric valve (2) connected with the main oil tank (1) and the first auxiliary oil tank (11) is opened, the oil is supplemented, and when the first liquid level sensor (5) detects that the oil position is recovered to the upper limit liquid level, the oil supplementing process is ended, the first electric valve (2) is closed, and one working cycle is completed.
- 3. A control method according to claim 2, characterized in that when it is necessary to stop the operation of the oil supply system, the third three-way electric valve (15) is directly closed, and the auxiliary tank is automatically opened for the relief process.
Description
Automatic oil supply system of internal combustion engine and control method thereof Technical Field The invention relates to the technical field of fuel supply of internal combustion engines, in particular to an automatic fuel supply system of an internal combustion engine and a control method thereof, aiming at a fuel supply system with high flow and no backflow. Background Many new fuels are different from traditional fossil fuels in physical and chemical properties, and if the traditional fuel supply system is continuously used, the traditional fuel supply system has various places with discomforts, and the oil pump and the pressure regulating valve in the traditional fuel supply system are expensive, and when the low-viscosity fuels such as methanol, dimethyl ether and the like are required to be supplied at a large flow rate, the vanes of the oil pump are extremely worn and easily damaged. Taking methanol as an example, the methanol is in a liquid state at normal temperature and normal pressure, is poisonous and has certain corrosiveness to metal, and the traditional pump and the pressure regulating valve are utilized to pressurize an oil supply pipeline of the methanol, so that the pump and the pressure regulating valve can be damaged rapidly, and even pollute the methanol fuel, and the methanol fuel can be operated only by replacing a special kit for the methanol, such as large-scale use, and the use cost can be increased. The CN205371117U patent document provides a fuel supply device with double pressurized fuel tanks, which uses compressed air as power, and is mainly aimed at reducing energy consumption. However, two oil tanks are adopted as the interchangeable supply source, no oil supplementing device is adopted, the use time and conditions are limited, and when aiming at the fuel with high saturated vapor pressure, a plurality of volatilized fuels are mixed with air to form mixed gas, and the mixed gas is discharged into the atmosphere, so that not only can environmental pollution be caused, but also energy waste can be caused. Disclosure of Invention In view of the above problems, an object of the present invention is to provide an automatic fuel supply system for an internal combustion engine and a control method thereof, which can solve the serious problem of damage to a pump and a pressure regulating valve caused by a novel fuel, and the fuel supply system can supply fuel for a long time continuously, save fuel, reduce environmental pollution, and realize data monitoring such as fuel consumption rate. The technical proposal is as follows: an automatic oil supply system of an internal combustion engine comprises a main oil tank, a first auxiliary oil tank, a second auxiliary oil tank, an air compressor and a detection control module, wherein the three parts are formed: Oil path portion: the first oil outlet of the main oil tank is connected to the oil inlet of the first auxiliary oil tank through a first electric valve, and the oil outlet of the first auxiliary oil tank is connected to the first oil inlet of the third three-way electric valve through a first one-way valve; The second oil outlet of the main oil tank is connected to the oil inlet of the second auxiliary oil tank through a second electric valve, and the oil outlet of the second auxiliary oil tank is connected to the second oil inlet of the third three-way electric valve through a second one-way valve; An oil outlet of the third three-way electric valve is connected to an oil rail, and an oil sprayer is arranged on the oil rail; and the gas path part is as follows: the air outlet of the air compressor is simultaneously connected to the air inlets of a first three-way electric valve and a second three-way electric valve, the first air outlet of the first three-way electric valve is connected to the air inlet of the first auxiliary oil tank, the first air outlet of the second three-way electric valve is connected to the air inlet of the second auxiliary oil tank, and the second air outlets of the first three-way electric valve and the second three-way electric valve are commonly connected to the engine air inlet channel; and a detection control part: The first auxiliary oil tank is internally provided with a first pressure sensor and a first liquid level sensor, the second auxiliary oil tank is internally provided with a second pressure sensor and a second liquid level sensor, and signal output lines of the sensors and the electric valves are connected to a detection control module. A control method of an automatic oil supply system of an internal combustion engine, comprising the steps of: After the oil supply pressure is set by a user, opening an air charging channel of a first three-way electric valve between the air compressor and the first auxiliary oil tank to enable the air compressor to start working as air charging in the first auxiliary oil tank, and after the first pressure sensor detects that the gas in the tank reache