Hydrogen pressurizing device based on hydraulic pump and recovered braking energy and control method
A technology for recovering brakes and hydraulic pumps, which is applied in the direction of oil supply devices, charging systems, engine components, etc., and can solve the problems that low-pressure hydrogen tanks cannot provide high-pressure hydrogen for internal combustion engines with direct injection of hydrogen in cylinders, and high-pressure hydrogen buffer tanks are expensive. , to achieve the effect of ensuring the battery life of hydrogen supply
Pending Publication Date: 2022-03-18
BEIJING UNIV OF TECH
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Problems solved by technology
However, the high-pressure hydrogen buffer tank is extremely expensive, and the low-pressure hydrogen tank, although lower in cost, cannot provide high-pressure hydrogen for direct-injection hydrogen internal combustion engines
Method used
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[0014] Below in conjunction with accompanying drawing and specific embodiment the present invention will be further described:
[0015] The internal hydrogen storage pressure of the low-pressure hydrogen tank 23 can be less than or equal to 15MPa, and the high-pressure hydrogen direct injection nozzle 21 can provide a maximum injection pressure of 30MPa;
[0016]The high-pressure hydrogen buffer tank 16 stores hydrogen above 35 MPa. The hydrogen supply pipeline P3 passes through the second pressure reducing valve 18, the hydrogen flow sensor 19, and the flame-retardant valve 20 in sequence and enters the high-pressure hydrogen direct injection nozzle 21. The electronic control unit ECU28 passes the hydrogen The injection signal h controls the opening and closing of the high-pressure hydrogen direct injection nozzle 21 to supply hydrogen to the in-cylinder direct injection hydrogen internal combustion engine 22, and the electronic control unit ECU28 controls the oil drain valve ...
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The invention provides a hydrogen pressurizing device based on a hydraulic pump and recovered braking energy and a control method of the hydrogen pressurizing device. The problem that a low-pressure hydrogen tank cannot supply high-pressure hydrogen to an in-cylinder direct hydrogen injection internal combustion engine and the problem of hydrogen supply endurance of a high-pressure hydrogen buffer tank are solved. When the residual hydrogen pressure of the high-pressure hydrogen buffer tank is lower than the hydrogen supply pressure required by the in-cylinder direct hydrogen injection internal combustion engine, hydrogen stored in the low-pressure hydrogen tank is introduced into the diaphragm type energy accumulator, and the hydrogen stored in the low-pressure hydrogen tank is pressurized to the hydrogen supply pressure required by the in-cylinder direct hydrogen injection internal combustion engine through the diaphragm type energy accumulator; the pressurized hydrogen pushes open the one-way valve to enter the high-pressure hydrogen buffer tank, and the high-pressure hydrogen is supplied to the in-cylinder direct hydrogen injection internal combustion engine through the high-pressure hydrogen buffer tank, so that the high-pressure hydrogen is supplied to the in-cylinder direct hydrogen injection internal combustion engine by the low-pressure hydrogen tank, and the hydrogen supply endurance of the high-pressure hydrogen buffer tank is ensured. The stable operation of the hydrogen pressurizing device system based on the hydraulic pump and the recovered brake energy is realized through the control of the electric control unit.
Description
technical field [0001] The invention proposes a hydrogen pressurization device based on a hydraulic pump and recovery of braking energy and its control method, and specifically relates to a system design of a hydrogen pressurization device based on a hydraulic pump and recovery of braking energy and a system design based on a hydraulic pump and recovery of braking energy. The invention relates to a control method of a hydrogen pressurizing device system for braking energy, which belongs to the field of internal combustion engines. Background technique [0002] Global warming is a serious world problem, and much of this warming is attributable to the use of fossil fuels in transportation. Although the internal combustion engine still occupies a global dominance in the field of transportation, many policies support fuel cells and electric vehicles. rely. As a result, engine manufacturers have designed alternative fuel engines and fuel systems in an attempt to provide suffici...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F02M21/02
CPCF02M21/0206F02M21/0221F02M21/023F02M21/0245F02M21/0275Y02T10/30
Inventor 纪常伟洪琛汪硕峰杨金鑫辛固孟昊常珂
Owner BEIJING UNIV OF TECH